U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Publication year rev 7986-2014 Remove constraint Publication year rev: 7986-2014 Subject term egg production Remove constraint Subject term: egg production
Start Over

Search

255  Search Results

« Previous | 1 - 50 of 255 |
Number of results to display per page

Search Results

1. A model for the description of feeding regulation by mesozooplankton under different conditions of temperature and prey nutritional status

Author:
Emmanuel Acheampong; Inga Hense; Michael A. St. John
Source:
Ecological modelling 2014 v.272 pp. 84-97
ISSN:
0304-3800
Subject:
Acartia tonsa; algae; animals; carbon; carbon nitrogen ratio; ecosystems; egg production; energy; feeding behavior; food webs; ingestion; models; nitrogen; nutritional status; nutritive value; plankton; temperature
Abstract:
... Ecosystem modelling studies that consider mesozooplankton feeding regulation have primarily focused on the impact of prey nutritional status and temperature separately, despite experimental evidence for strong links between these two factors. Here, we propose a method based on optimal feeding behaviour of individual mesozooplankton that can be used to derive acclimative food ingestion, assimilatio ...
DOI:
10.1016/j.ecolmodel.2013.09.009

2. A new approach for the laboratory culture of the fathead minnow, Pimephales promelas

Author:
Denise A. Gordon; Mark E. Smith; Melissa Wratschko; David Agard; Lisa Holden; Steve Wilcox; James M. Lazorchak
Source:
Environmental toxicology and chemistry 2014 v.33 no.1 pp. 126-133
ISSN:
0730-7268
Subject:
Pimephales promelas; aquariums; breeding stock; egg production; eggs; farmed fish; glass; labor; minnows; spawning; stainless steel; tanks; toxicity; toxicology
Abstract:
... Fathead minnows are routinely cultured for use in aquatic toxicology studies. A new mass culture system described in the present study consisted of 6 stainless steel tanks, each containing 68 fish and 20 spawning substrates. Spawning results are compared with a previous system of 22 individual glass aquaria, which contained 16 fish and 4 spawning substrates per tank. During a 19‐mo period, the new ...
DOI:
10.1002/etc.2396
PubMed:
24115165

3. A novel framework for interpretation of data from the fish short‐term reproduction assay (FSTRA) for the detection of endocrine‐disrupting chemicals

Author:
Gerald T. Ankley; Kathleen M. Jensen
Source:
Environmental toxicology and chemistry 2014 v.33 no.11 pp. 2529-2540
ISSN:
0730-7268
Subject:
Pimephales promelas; agonists; androgen receptors; antagonists; egg production; egg yolk; enzymes; females; fish; histopathology; males; screening; vitellogenin
Abstract:
... The fish short‐term reproduction assay (FSTRA) is a key component of the US Environmental Protection Agency's Endocrine Disruptor Screening Program (EDSP), which uses a weight‐of‐evidence analysis based on data from several assays to identify the potential for chemicals to act as agonists or antagonists of the estrogen or androgen receptors (ER and AR), or inhibitors of steroidogenic enzymes. The ...
DOI:
10.1002/etc.2708
PubMed:
25098918

4. A rabbit eye model for in vivo transformation of progenetic metacercariae of Clinostomum complanatum into ovigerous adult worms

Author:
A. Rizvi; Z.A. Zaidi; M.M. Alam; A. Zafar; P.A.A. Shareef; M.K. Saifullah; M. Saleemuddin; S.M.A. Abidi
Source:
Journal of helminthology 2014 v.88 no.1 pp. 69-73
ISSN:
1475-2697
Subject:
Trematoda; Trichogaster; adults; cecum; egg production; eggs; eyes; fish; gonads; host-parasite relationships; hosts; humans; metacercariae; models; necropsy; rabbits; uterus; zoonoses
Abstract:
... Clinostomum complanatum is a digenetic trematode that causes yellow grub disease in some fish species and also shows zoonotic potential by sporadically infecting humans. In this study, progenetic metacercariae of C. complanatum were obtained from the fish Trichogaster fasciatus, and were aseptically placed in conjunctival incisions made in the superior and inferior fornices of the eye of rabbits, ...
DOI:
10.1017/S0022149X12000752
PubMed:
23232016

5. A trade‐off between quantity and quality of offspring in haematophagous ectoparasites: the effect of the level of specialization

Author:
Irina S. Khokhlova; Shai Pilosof; Laura J. Fielden; A. Allan Degen; Boris R. Krasnov; Sheena Cotter
Source:
journal of animal ecology 2014 v.83 no.2 pp. 397-405
ISSN:
0021-8790
Subject:
Xenopsylla; blood meal; ectoparasites; egg production; eggs; femur; hosts; mothers; progeny; rodents; starvation
Abstract:
... Theory predicts an adaptive trade‐off between quantity and quality of offspring if mothers can reliably predict the offspring environment. We studied egg production and quality of offspring in two flea species (host‐specialist Parapulex chephrenis and host‐generalist Xenopsylla ramesis) exploiting eight rodent species. We evaluated quality of new imagoes via their developmental time, size (length ...
DOI:
10.1111/1365-2656.12134

6. Acaricidal activity of extract of Artemisia absinthium against Rhipicephalus sanguineus of dogs

Author:
R. Godara; S. Parveen; R. Katoch; A. Yadav; P. K. Verma; M. Katoch; D. Kaur; A. Ganai; P. Raghuvanshi; N. K. Singh
Source:
Parasitology research 2014 v.113 no.2 pp. 747-754
ISSN:
0932-0113
Subject:
Artemisia absinthium; Rhipicephalus sanguineus; acaricidal properties; adults; aerial parts; amitraz; bioassays; chloroform; dogs; egg hatchability; egg production; eggs; hatching; humans; larvae; lethal concentration 50; mortality; pathogens; ticks
Abstract:
... The objective of the study was to evaluate the in vitro efficacy of different concentrations of chloroform extract obtained from the aerial parts of Artemisia absinthium in comparison to amitraz on adults, eggs and larvae of the dog tick Rhipicephalus sanguineus using the adult immersion test (AIT), egg hatchability test (EHT) and larval packet test (LPT), respectively. Five concentrations of the ...
DOI:
10.1007/s00436-013-3704-9
PubMed:
24288053

7. Acaricidal properties of two extracts from Guiera senegalensis J.F. Gmel. (Combrataceae) against Hyalomma anatolicum (Acari: Ixodidae)

Author:
Ilham M. Osman; A.S. Mohammed; A.B. Abdalla
Source:
Veterinary parasitology 2014 v.199 no.3-4 pp. 201-205
ISSN:
0304-4017
Subject:
Hyalomma anatolicum; acaricidal properties; adults; correlation; egg production; eggs; females; hatching; inhibitory concentration 50; larvae; leaves; lethal concentration 50; molting; mortality; nymphs; petroleum
Abstract:
... Laboratory test were carried out on eggs, larvae, nymphs and adults of Hyalomma anatolicum to determine the acaricidal activities of petroleum ether (PE) and crude ethanolic extracts (EE) from the leaves of Guiera senegalensis J.F. Gmel. (Combrataceae) using immersion method.Stock solutions, of 300mg/ml (30%) of the each two extract, were prepared. Six two-fold serial dilutions each with three rep ...
DOI:
10.1016/j.vetpar.2013.11.010

8. Advancing avian nutrition through best feeding practice

Author:
A. L. Fidgett; L. Gardner
Source:
International zoo yearbook 2014 v.48 no.1 pp. 116-127
ISSN:
0074-9664
Subject:
viability; nutrient content; diet; egg production; progeny; chicks; zoos
Abstract:
... At a time when zoo populations are being relied upon for future progeny and long‐term sustainability of our avian populations, nutrition is vitally important. However, diet review, evaluation and change are often met with disinterest and complacency. Link nutrition to poor health, associated veterinary costs, poor egg production and low chick viability and suddenly the subject becomes more importa ...
DOI:
10.1111/izy.12057

9. Alteration in lymphocytes responses, cytokine and chemokine profiles in laying hens infected with Salmonella Typhimurium

Author:
Shi P. Bai; Yong Huang; Yu H. Luo; Lei L. Wang; Xue M. Ding; Jian P. Wang; Qiu F. Zeng; Ke Y. Zhang
Source:
Veterinary immunology and immunopathology 2014 v.160 no.3-4 pp. 235-243
ISSN:
0165-2427
Subject:
CD4-positive T-lymphocytes; Salmonella Typhimurium; cell-mediated immunity; egg production; flow cytometry; gene expression; ileum; interferon-gamma; interleukin-10; interleukin-12; interleukin-18; interleukin-1beta; interleukin-4; interleukin-6; interleukin-8; laying hens; messenger RNA; salmonellosis; spleen; tonsils
Abstract:
... Salmonella Typhimurium has been reported to contaminate egg production across the world, but the exact nature of the immune mechanisms protective against Salmonella infection in laying hens has not been characterized at the molecular level. The experiment was conducted to determine Salmonella colonization and lymphocytes subpopulation in the ileum and spleen, and the mRNA expression of pro-inflamm ...
DOI:
10.1016/j.vetimm.2014.05.015

10. Ammonia concentrations and modeling of inorganic particulate matter in the vicinity of an egg production facility in Southeastern USA

Author:
Qian-Feng Li; Lingjuan Wang-Li; Sanjay B. Shah; R. K. M. Jayanty; Peter Bloomfield
Source:
Environmental science and pollution research international 2014 v.21 no.6 pp. 4675-4685
ISSN:
0944-1344
Subject:
aerosols; ammonia; chlorides; combs (social insects); correlation; egg production; farms; ion exchange chromatography; particulates; poultry; samplers; simulation models; swine; North Carolina
Abstract:
... Ammonia (NH₃) is an important base gas and can react with acidic species to form atmospheric aerosols. Due to the rapid growth of poultry and swine production in the North Carolina Coastal Plain, atmospheric NH₃concentrations across the region have subsequently increased. Ammonia concentrations and inorganic particulate matter (PM) at four ambient stations in the vicinity of an egg production faci ...
DOI:
10.1007/s11356-013-2417-z
PubMed:
24352547

11. An Experimental Infection Model for Escherichia coli Egg Peritonitis in Layer Chickens

Author:
Chaudhari Atul A.; Kariyawasam Subhashinie
Source:
Avian diseases 2014 v.58 no.1 pp. 25-33
ISSN:
1938-4351
Subject:
Escherichia coli; White Leghorn; anorexia; bacteria; bird diseases; disease control; edema; egg production; egg yolk; eggs; histopathology; laying hens; microbial load; models; mortality; oviducts; pathogenesis; pericarditis; peritoneum; peritonitis; salpingitis; vaccines
Abstract:
... The present study describes an experimental infection model for avian pathogenic Escherichia coli (APEC)-induced egg peritonitis in layer chickens. First, a pilot study which consisted of two separate experiments was carried out to compare two routes of inoculations of APEC to induce peritonitis and to examine if the presence of egg yolk in the peritoneum would facilitate APEC-induced peritonitis. ...
DOI:
10.1637/10536-032213-Reg.1

12. An Experimental Test of the Ability of Daphnia Galeata Resting Egg Production in Lake Biwa

Author:
Narumi K. TSUGEKI; Jotaro URABE
Source:
Journal of limnology 2014 v.73 no.1 pp. -
ISSN:
1723-8633
Subject:
Daphnia galeata; egg production; eggs; endocrine-disrupting chemicals; genetic variation; lakes; rearing; sediments; winter; Japan
Abstract:
... The Daphnia galeata population in Lake Biwa (Japan) had almost ceased producing resting eggs by the 1980s. To examine whether D. galeata had lost the ability to produce resting eggs, or if chemical contamination was inhibiting resting egg production, individuals collected in fall (November) and late winter (March), were reared in the laboratory. More than 50% of these D. galeata individuals produc ...
DOI:
10.4081/jlimnol.2014.569

13. An evaluation of outcrossing to improve mass-reared strains of the Queensland fruit fly Bactrocera tryoni

Author:
A.S. Gilchrist; A.W. Meats
Source:
International journal of tropical insect science 2014 v.34 no.S1 pp. S35
ISSN:
1742-7592
Subject:
Bactrocera tryoni; domestic animals; egg production; females; heterosis; hybrids; insects; males; mass rearing; outcrossing; parents; sterile insect technique; strains; stress tolerance; thermal stress
Abstract:
... Outcrossing to wild or unrelated strains has been proposed as a counter to the negative effects of adaptation by domesticated animals to captive-breeding environments. However, for mass-reared insects intended for sterile insect technique release, outcrossing may reduce productivity in mass-rearing facilities. In this study, we characterized adaptation to mass-rearing in the Queensland fruit fly B ...
DOI:
10.1017/S1742758414000216

14. An immunogenic Salmonella ghost confers protection against internal organ colonization and egg contamination

Author:
Chetan V. Jawale; John Hwa Lee
Source:
Veterinary immunology and immunopathology 2014 v.162 no.1-2 pp. 41-50
ISSN:
0165-2427
Subject:
Salmonella Enteritidis; T-lymphocytes; cell-mediated immunity; egg production; eggs; genes; immunoglobulin A; immunoglobulin G; intestines; laying hens; liver; plasmids; protective effect; salmonellosis; vaccination; virulence
Abstract:
... The tightly regulated expression of the PhiX174 lysis gene E from a multi-copy plasmid led to the stable production of an Salmonella Enteritidis bacterial ghost. The present study was conducted to evaluate induction of the humoral and cell-mediated immune responses induced after single or double intramuscular immunization with the S. Enteritidis ghost and to assess its protective effect on coloniz ...
DOI:
10.1016/j.vetimm.2014.08.015

15. An overview of infectious bronchitis virus in chickens

Author:
F. AWAD; R. CHHABRA; M. BAYLIS; K. GANAPATHY
Source:
World's poultry science journal 2014 v.70 no.2 pp. 375-384
ISSN:
1743-4777
Subject:
Infectious bronchitis virus; chickens; egg production; egg quality; financial economics; genetic recombination; growth retardation; inactivated vaccines; kidneys; morbidity; mortality; mutation; pathogens; poultry industry; viruses
Abstract:
... Infectious bronchitis virus (IBV) is one of the foremost causes of economic loss within the poultry industry. IBV is a commonly occurring, economically significant pathogen of commercial chicken. Economic consequences to the poultry industry comprise mortality, growth retardation and high condemnation rates in meat-type birds. In addition, decreased egg production, reduced internal and external eg ...
DOI:
10.1017/S0043933914000385

16. Atrazine reduces reproduction in Japanese medaka (Oryzias latipes)

Author:
Diana M. Papoulias; Donald E. Tillitt; Melaniya G. Talykina; Jeffrey J. Whyte; Catherine A. Richter
Source:
Aquatic toxicology 2014 v.154 pp. 230-239
ISSN:
0166-445X
Subject:
Oryzias latipes; Pimephales promelas; adults; aromatase; atrazine; breeding; egg production; eggs; females; fish; gonadosomatic index; males; oocytes; phenotype; risk; surface water; tanks; testosterone; United States
Abstract:
... Atrazine is an effective broadleaf herbicide and the second most heavily used herbicide in the United States. Effects along the hypothalamus–pituitary–gonad axis in a number of vertebrate taxa have been demonstrated. Seasonally elevated concentrations of atrazine in surface waters may adversely affect fishes, but only a few studies have examined reproductive effects of this chemical. The present s ...
DOI:
10.1016/j.aquatox.2014.05.022

17. Axone, an Ethnic Probiotic Containing Food, Reduces Age of Sexual Maturity and Increases Poultry Production

Author:
Bhoj Raj Singh; R. K. Singh
Source:
Probiotics and antimicrobial proteins 2014 v.6 no.2 pp. 88-94
ISSN:
1867-1306
Subject:
sexual maturity; weight gain; oviposition; soybean products; bacteria; males; egg weight; villages; probiotics; Bacillus coagulans; egg production; chicks; females; poultry; India
Abstract:
... Axone (Akhuni) is a homemade synbiotic (Nagamese fermented soybean product) served as side dish in North Eastern India. In this study, effects of Axone feeding on growth, weight gain, sexual maturity and egg production on Vanaraja birds (a strain of poultry bird developed at PDP Hyderabad for villages and backyard poultry) were evaluated. Axone incorporation in commercial poultry feed at the rate ...
DOI:
10.1007/s12602-014-9160-8

18. Azadirachtin-Induced Sterilization in Mature Females of Rhodnius prolixus

Author:
Denise Feder; Denise Valle; H. Rembold; E. S. Garcia
Source:
Zeitschrift für Naturforschung 2014 v.43 no.11-12 pp. 908-913
ISSN:
1865-7125
Subject:
Rhodnius prolixus; dose response; egg production; eggs; females; hemolymph; mechanism of action; oocytes; radioimmunoassays; vitellin; vitellogenin
Abstract:
... The effects of azadiraehtin A , given orally, on the reproduction of mature females of Rhodnius prolixus were studied. Azadiraehtin A caused a reduction in oocyte growth and consequently in the egg production in a dose-dependent manner. Eggs layed had no alteration in their viabilities. A significant correlation between these effects and the titers of both vitellogenin in the haemolymph and vitell ...
DOI:
10.1515/znc-1988-11-1218

19. Biochemical characterization and role of the proteasome in the oxidative stress response of adult Schistosoma mansoni worms

Author:
Renato Graciano de Paula; Alice Maria de Magalhães Ornelas; Enyara Rezende Morais; William de Castro Borges; Massimo Natale; Lizandra Guidi Magalhães; Vanderlei Rodrigues
Source:
Parasitology research 2014 v.113 no.8 pp. 2887-2897
ISSN:
0932-0113
Subject:
Schistosoma mansoni; adults; bubbles; egg production; homeostasis; humans; hydrogen peroxide; immune system; metabolism; mortality; oxidative stress; parasites; peeling; proteasome endopeptidase complex; protein degradation; proteinases; proteins; schistosomiasis; stress response; viability
Abstract:
... The trematode Schistosoma mansoni, an important parasite of humans, is the principle agent of the disease schistosomiasis. In the human host, one of the most important stress factors of this parasite is the oxidative stress generated by both the metabolism of the worm and the immune system of the host. The proteasomal system is responsible for protein homeostasis during oxidative stress. The 26S p ...
DOI:
10.1007/s00436-014-3950-5
PubMed:
24870249

20. Biological and biochemical characterization of a red‐eye mutant in Nilaparvata lugens （Hemiptera: Delphacidae）

Author:
Shu‐Hua Liu; Jing Yao; Hong‐Wei Yao; Peng‐Ling Jiang; Bao‐Jun Yang; Jian Tang
Source:
Insect science 2014 v.21 no.4 pp. 469-476
ISSN:
1672-9609
Subject:
Nilaparvata lugens; alleles; egg production; eyes; genetic techniques and protocols; granules; loci; microscopy; mutants; mutation; pests; phenotype; pigments; rice; transportation; viability; Asia
Abstract:
... A red‐eye colony was established in our laboratory in brown planthopper (BPH), Nilaparvata lugens (Stål), a major rice pest in Asia. Except for the red‐eye phenotype, no other differences were observed between the wild‐type (brown eye) and the mutant‐type (red eye) in external characters. Genetic analysis revealed that the red‐eye phenotype was controlled by a single autosomal recessive allele. Bi ...
DOI:
10.1111/1744-7917.12049
PubMed:
23955841

21. Biological parameters of the predatory mite Cheletomimus bakeri (Acari: Cheyletidae) feeding on Tetranychus cinnabarinus (Acari: Tetranychidae)

Author:
Sevda Kamburgil; Ibrahim Cakmak
Source:
Biocontrol science and technology 2014 v.24 no.12 pp. 1339-1348
ISSN:
1360-0478
Subject:
Cheyletidae; Tetranychus cinnabarinus; adults; biological control; egg production; eggs; fecundity; males; predation; predatory mites; relative humidity; temperature
Abstract:
... Developmental periods of egg, larva and nymphal stages and fecundity as well as predation of Cheletomimus bakeri (Acari: Cheyletidae) feeding on Tetranychus cinnabarinus (Acari: Tetranychidae) were evaluated at different temperatures (15, 20, 25, 30 and 35°C) at 65 ± 10% relative humidity and 16 L: 8D in the laboratory. The development periods of C. bakeri from egg through adult decreased signific ...
DOI:
10.1080/09583157.2014.938610

22. Can UK livestock production be configured to maintain production while meeting targets to reduce emissions of greenhouse gases and ammonia?

Author:
J. Webb; Eric Audsley; Adrian Williams; Kerry Pearn; Julia Chatterton
Source:
Journal of cleaner production 2014 v.83 pp. 204-211
ISSN:
0959-6526
Subject:
ammonia; animal manure management; autumn; beef; beef cattle; buildings; calves; calving; dairy herds; dairy manure; diet; drying; egg production; eggs; feed conversion; feeds; finishing; greenhouse gas emissions; greenhouse gases; highlands; life cycle assessment; management systems; meat production; milk production; nutrient use efficiency; poultry; poultry manure; poultry meat; production technology; rumen fermentation; sheep; slurries; sows; swine production; tillage; weanlings; United Kingdom
Abstract:
... We used a Life Cycle Assessment approach to determine whether the inherent differences in emissions to air among existing livestock production systems could be used to reconfigure the UK livestock sector in order to meet current greenhouse gas (GHG) and ammonia (NH3) targets while maintaining production at current levels. Output, defined as financial value, was optimized across all sub-sectors. Us ...
DOI:
10.1016/j.jclepro.2014.06.085

23. Canonical-correlation analysis applied to selection-index methodology in quails

Author:
André Marubayashi Hidalgo; Luciano Pinheiro da Silva; Rodrigo Reis Mota; Elias Nunes Martins
Source:
Livestock science 2014 v.169 pp. 35-41
ISSN:
1871-1413
Subject:
Coturnix coturnix; age at first egg; body weight changes; egg production; egg weight; eggs; genetic improvement; quails; selection index; selection response
Abstract:
... Genetic evaluations in dual-purpose quails (Coturnix coturnix) have demonstrated that overall genetic gains in a breeding program are achieved not only based on a specific trait, but on several. The most common technique to use all this information is the selection index. Another alternative may be the canonical-correlation analysis applied to selection index. There is, however, a lack of studies ...
DOI:
10.1016/j.livsci.2014.09.021

24. Capon Production – Breeding Stock, Rooster Castration And Rearing Methods, And Meat Quality – A Review

Author:
Jolanta Calik
Source:
Annals of animal science 2014 v.14 no.4 pp. 769-777
ISSN:
2300-8733
Subject:
body weight; breeding stock; breeds; castration; cockerels; egg production; eggs; flavor; germplasm conservation; hatching; laying hens; meat; meat production; meat quality; nutrients; odors; phenotype; rearing; roosters; Poland
Abstract:
... Over the last decade, there has been an increased consumer interest in niche food products with special aroma and flavour, and rich in nutrients. Poland has a large (19 lines) and valuable collection of laying hens enrolled in the genetic resources conservation programme. Research to date has shown these hen breeds to vary in phenotype, productivity, and biological quality of hatching eggs and mea ...
DOI:
10.2478/aoas-2014-0050

25. Cassava root chips andMoringa oleifera leaf meal as alternative feed ingredients in the layer ration

Author:
Etalem B. Tesfaye; Getachew M. Animut; Mengistu L. Urge; Tadelle A. Dessie
Source:
Journal of applied poultry research 2014 v.23 no.4 pp. 614-624
ISSN:
1056-6171
Subject:
body weight; cassava; chemical analysis; color; corn; diet; egg masses; egg production; egg weight; eggs; embryonic mortality; energy; leaves; mortality; research; soybean meal
Abstract:
... A study was conducted to evaluate effects of cassava root chips (CRC) andMoringa oleifera leaf meal (MOLM) inclusion in layer rations on egg laying performance, egg quality parameters, fertility, and hatchability. One hundred twenty Dominant CZ layers, 22 wk of age, and 12 cocks were used and equally divided into 4 dietary treatments with 3 replications. Treatment rations contained CRC and MOLM [i ...
DOI:
10.3382/japr.2013-00920

26. Changes in some blood parameters and production performance of old laying hens due to growth hormone and testosterone injection

Author:
H. Mohammadi; Z. Ansari‐Pirsaraei
Source:
Journal of animal physiology and animal nutrition 2014 v.98 no.3 pp. 483-490
ISSN:
0931-2439
Subject:
blood composition; breeding; egg production; estradiol; glucose; high density lipoprotein cholesterol; laying hens; low density lipoprotein; somatotropin; testosterone
Abstract:
... The experiment was designed to study the changes in some blood parameters and production performance of old laying hens after injection of different doses of growth hormone (GH) and testosterone (Ts). A total of 160 old laying hens (HyLine W‐36) at 73 weeks of age were weighed individually and randomly allocated to four treatments with four replicates and 10 birds in each replicate in a completely ...
DOI:
10.1111/jpn.12095
PubMed:
23808354

27. Changes in the spatial distribution of spawning activity by north-east Atlantic mackerel in warming seas: 1977–2010

Author:
Kathryn M. Hughes; Leonie Dransfeld; Mark P. Johnson
Source:
Marine biology 2014 v.161 no.11 pp. 2563-2576
ISSN:
0025-3162
Subject:
Scomber scombrus; egg production; eggs; fauna; gravity; habitats; mackerel; migratory behavior; spawning; spring; surface water temperature; surveys; variance
Abstract:
... Migratory species with a broad geographic range, such as north-east Atlantic mackerel, may be amongst the fauna most able to respond to warming seas, typically with a poleward shift in range. Habitat heterogeneity could, however, produce more complex patterns than a simple polewards translation in distribution. We tested for changes in the central location and spatial spread of mackerel spawning o ...
DOI:
10.1007/s00227-014-2528-1

28. Characterization of a Low Pathogenic Avian Influenza H5N2 Virus Isolated from a Turkey Breeder Flock in Manitoba, Canada

Author:
Berhane Y.; Joseph T.; Kehler H.; Hisanaga T.; Embury-Hyatt C.; Diederich S.; McGreevy K. Hooper; Handel K.; Cottam-Birt C.; Pasick J.
Source:
Avian diseases 2014 v.58 no.1 pp. 1-7
ISSN:
1938-4351
Subject:
Influenza A virus; amino acid sequences; antibodies; avian influenza; barns; blood serum; ducks; egg production; farms; flocks; food consumption; genes; hemagglutinins; intravenous injection; monitoring; pathogenicity; phylogeny; sequence analysis; sialidase; turkeys; viruses; water birds; Manitoba; United States
Abstract:
... In November 2010, an outbreak of avian influenza (AI) due to the H5N2 subtype virus occurred in a turkey breeder farm in northern Manitoba, Canada. The only clinical signs observed were depression, decrease in food consumption, and loss of egg production. The hemagglutinin (HA) cleavage (HA₀) site of the isolated H5N2 virus was PQRETR/GLF, consistent with low pathogenic AI viruses. The intravenous ...
DOI:
10.1637/10591-061213-Reg.1

29. Characterization of the expression profile of CRBP1 and CRBP3 gene in chicken

Author:
Yan Wang; Lihua Xiao; Xiaoling Zhao; Yiping Liu; Qing Zhu
Source:
Molecular biology reports 2014 v.41 no.8 pp. 5031-5038
ISSN:
0301-4851
Subject:
chicken breeds; chickens; egg production; gene expression; genes; hypothalamus; kidneys; liver; messenger RNA; quantitative polymerase chain reaction; reproductive traits
Abstract:
... In this study, we quantified the expression of CRBP1 and CRBP3 in Roman layer (R) and Erlang mountainous chickens (SD02 and SD03), to discern the tissue, breed and age-related expression patterns in order to discover potential involvement in egg production and other related reproduction traits. Real-time quantitative PCR assays were developed for accurate measurement of CRBP1 and CRBP3 mRNA levels ...
DOI:
10.1007/s11033-014-3369-1
PubMed:
24728568

30. Chronic effects of PFOA and PFOS on sexual reproduction of freshwater rotifer Brachionus calyciflorus

Author:
Lilan Zhang; Junfeng Niu; Yujuan Wang; Jianghong Shi; Qingguo Huang
Source:
Chemosphere 2014 v.114 pp. 114-120
ISSN:
0045-6535
Subject:
Brachionus calyciflorus; aquatic environment; bioassays; egg production; eggs; freshwater; hatching; long term effects; marine ecosystems; oogenesis; population growth; progeny; sexual reproduction; toxicity
Abstract:
... Rotifers play an important role in the dynamics of freshwater and coastal marine ecosystems, and are also important tools for assessing toxicity in aquatic environments. In this study, the effects of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) on the population growth rate and resting egg production of rotifer Brachionus calyciflorus were investigated. Reproductive bioassays ...
DOI:
10.1016/j.chemosphere.2014.03.099

31. Clonal diversity and turnover in an overwintering Daphnia pulex population, and the effect of fish predation

Author:
Kathrin P. Lampert; Bishnu P. Regmi; Ingrid Wathne; Petter Larsson
Source:
Freshwater biology 2014 v.59 no.8 pp. 1735-1743
ISSN:
0046-5070
Subject:
Daphnia pulex; asexual reproduction; autumn; clones; ecosystems; egg production; eggs; environmental factors; extinction; females; fish; genetic variation; genotype; lakes; microsatellite repeats; mortality; overwintering; parthenogenesis; population density; predation; sexual reproduction; spring; summer; winter; Norway
Abstract:
... Daphnia are key species in lake ecosystems and are a model system in ecology. Their ecological success is very much due to their dual reproductive mode: females reproduce parthenogenetically when environmental conditions are favourable but switch to sexual reproduction and resting egg production in unfavourable conditions such as winter. Phases of clonal reproduction lower the overall genotypic di ...
DOI:
10.1111/fwb.12378

32. Clues from the recent past to assess recruitment of Mediterranean small pelagic fishes under sea warming scenarios

Author:
F. Maynou; A. Sabatés; J. Salat
Source:
Climatic change 2014 v.126 no.1-2 pp. 175-188
ISSN:
0165-0009
Subject:
life history; pelagic fish; Sardinella aurita; ichthyoplankton; summer; Engraulis encrasicolus; fisheries; water currents; trophic relationships; models; climate change; larvae; viability; anchovies; surface water temperature; surveys; spawning; environmental factors; food availability; egg production; Mediterranean Sea
Abstract:
... Knowledge of the effect of environmental variables on the early life history of fishes is essential to assess the effect of future environmental changes on the recruitment of commercial species. We investigate the effect of sea warming on two small pelagic fishes (Engraulis encrasicolus and Sardinella aurita) in the NW Mediterranean Sea based on the analysis of ichthyoplankton data collected in tw ...
DOI:
10.1007/s10584-014-1194-0

33. Colony attendance and at‐sea distribution of thin‐billed prions during the early breeding season

Author:
Petra Quillfeldt; Richard A. Phillips; Melanie Marx; Juan F. Masello
Source:
Journal of avian biology 2014 v.45 no.4 pp. 315-324
ISSN:
0908-8857
Subject:
Pachyptila belcheri; breeding; breeding season; burrows; chicks; egg masses; egg production; energy; females; life history; males; prions; seabirds; summer; Falkland Islands
Abstract:
... Procellariiform seabirds have extreme life histories; they are very long‐lived, first breed when relatively old, lay single egg clutches, both incubation and chick‐rearing are prolonged and chicks exhibit slow growth. The early part of the breeding season is crucial, when pair bonds are re‐established and partners coordinate their breeding duties, but is a difficult period to study in burrow‐nesti ...
DOI:
10.1111/jav.00307

34. Commercial formulation of Metarhizium anisopliae for the control of Rhipicephalus microplus in a pen study

Author:
Mariana G. Camargo; Allan F. Marciano; Fillipe A. Sá; Wendell M.S. Perinotto; Simone Quinelato; Patrícia S. Gôlo; Isabele C. Angelo; Márcia C.A. Prata; Vânia R.E.P. Bittencourt
Source:
Veterinary parasitology 2014 v.205 no.1-2 pp. 271-276
ISSN:
0304-4017
Subject:
Metarhizium anisopliae; Rhipicephalus microplus; biological assessment; egg production; females; fungi; hatching; in vivo studies; mineral oil; polysorbates; ticks
Abstract:
... The present study evaluated, for the first time, the effect of the commercial formulation Metarril® SP Organic of Metarhizium anisopliae plus 10% mineral oil to control Rhipicephalus microplus in a pen study. Three groups were formed with six animals each: the first group was exposed to Metarril® plus 10% mineral oil and 1% Tween 80; the second group was exposed to sterile distilled water, mineral ...
DOI:
10.1016/j.vetpar.2014.07.011

35. Comparative evaluation of Salmonella Enteritidis ghost vaccines with a commercial vaccine for protection against internal egg contamination with Salmonella

Author:
Chetan V. Jawale; John Hwa Lee
Source:
Vaccine 2014 v.32 no.45 pp. 5925-5930
ISSN:
0264-410X
Subject:
Escherichia coli; Salmonella Enteritidis; adverse effects; chickens; egg production; eggs; enterotoxins; heat; immunization; immunoglobulin A; immunoglobulin G; injection site; intravenous injection; vaccines; virulence
Abstract:
... The study was conducted for the comparative evaluation of the vaccine potential of Salmonella Enteritidis (S. Enteritidis, SE) ghost, SE ghost carrying Escherichia coli heat labile enterotoxin B subunit (LTB) protein, and a commercial vaccine. Group A chickens were used as a non-vaccinated control, group B chickens were immunized with the ghost carrying LTB protein, group C chickens were immunized ...
DOI:
10.1016/j.vaccine.2014.08.072

36. Comparative safety of the antifouling compound butenolide and 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT) to the marine medaka (Oryzias melastigma)

Author:
Lianguo Chen; Rui Ye; Ying Xu; Zhaoming Gao; Doris W.T. Au; Pei-Yuan Qian
Source:
Aquatic toxicology 2014 v.149 pp. 116-125
ISSN:
0166-445X
Subject:
Oryzias melastigma; acetylcholinesterase; active ingredients; adults; adverse effects; antifouling agents; biomarkers; brain; chemical treatment; chronic exposure; ecotoxicology; egg production; environmental assessment; estradiol; females; gender differences; industry; liver; males; marine fish; neurons; oxidative stress; progeny; reproductive success; seawater; testosterone; toxicity
Abstract:
... This study evaluated the potential adverse effects of butenolide, a promising antifouling compound, using the marine medaka (Oryzias melastigma), a model fish for marine ecotoxicology. The active ingredient used in the commercial antifoulant SeaNine 211, 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT) was employed as the positive control. Adult marine medaka (4-month-old) were exposed to vario ...
DOI:
10.1016/j.aquatox.2014.01.023

37. Comparative study of the effects of organic selenium on hen performance and productivity of broiler breeders

Author:
K. Rajashree; T. Muthukumar; N. Karthikeyan
Source:
British poultry science 2014 v.55 no.3 pp. 367-374
ISSN:
1466-1799
Subject:
antioxidants; broiler breeders; cages; egg albumen; egg production; egg weight; eggs; feed supplements; glutathione peroxidase; hens; mortality; protein content; selenium; sodium selenite; specific gravity; yeasts
Abstract:
... 1. A 10-week experiment was conducted with Ross 308 broiler breeder chickens in cages to evaluate the influence of organic and inorganic sources of selenium (Se) supplementation. A total of 600 birds at 29 weeks of age were divided at random into 4 groups and fed on a maize–soya basal diet supplemented with different forms of Se. 2. The first (control) group was given the basal diet without Se sup ...
DOI:
10.1080/00071668.2014.921663

38. Comparison of the environmental footprint of the egg industry in the United States in 1960 and 2010

Author:
Nathan Pelletier; Maro Ibarburu; Hongwei Xin
Source:
Poultry science 2014 v.93 no.2 pp. 241-255
ISSN:
0032-5791
Subject:
animal manure management; ecological footprint; egg industry; egg production; feed composition; feed conversion; fertilizers; greenhouse gases; hens; life cycle assessment; primary energy
Abstract:
... The US egg industry has evolved considerably over recent decades by incorporating new technologies and production practices. To date, there has been no comprehensive assessment of the resource demand and environmental effects of these changes. This study quantifies the environmental footprint of egg production supply chains in the United States for 2010 compared with 1960 using life cycle assessme ...
DOI:
10.3382/ps.2013-03390

39. Consequences of experimental clutch enlargement in a High Arctic single-egg layer, the Little Auk (Alle alle)

Author:
D. Jakubas; K. Wojczulanis-Jakubas
Source:
Canadian journal of zoology 2014 v.92 no.8 pp. 681-687
ISSN:
0008-4301
Subject:
energy; nests; rearing; evolution; eggs; fledglings; hatching; egg production; chicks; clutch size; Arctic region
Abstract:
... Initial reproductive investments in birds are energy-demanding. Amount of energy allocated to egg production and incubation may have an important role in determining parental fitness and evolution of clutch size. Here, we investigated whether the Little Auk (Alle alle (L., 1758)), a small alcid with one-egg clutch but two brood patches (probably remnant of the original two-egg clutch), is capable ...
DOI:
10.1139/cjz-2014-0027

40. Corticosterone in ovo modifies aggressive behaviors and reproductive performances through alterations of the hypothalamic-pituitary-gonadal axis in the chicken

Author:
Abdelkareem A. Ahmed; Wenqiang Ma; Yingdong Ni; Song Wang; Ruqian Zhao
Source:
Animal reproduction science 2014 v.146 no.3-4 pp. 193-201
ISSN:
0378-4320
Subject:
aggression; arginine vasotocin; corticosterone; corticotropin-releasing hormone; egg production; egg quality; eggs; embryogenesis; follicle-stimulating hormone receptors; gene expression; glucocorticoid receptors; gonadotropin-releasing hormone; hens; hypothalamus; luteinizing hormone; mammals; messenger RNA; ovarian follicles; oviducts; progeny
Abstract:
... Exposure to excess glucocorticoids during embryonic development affects offspring reproduction and suppresses the hypothalamic-pituitary-gonadal (HPG) axis in mammals. However, whether corticosterone (CORT) causes similar effects in the chicken remains unclear. In the present study, we injected low (0.2μg) and high (1μg) doses of CORT in ovo before incubation and detected changes in aggressive beh ...
DOI:
10.1016/j.anireprosci.2014.02.013

41. Curative and preventive efficacy of orally administered afoxolaner against Ctenocephalides canis infestation in dogs

Author:
Pascal Dumont; Boyd Gale; Theodore S. Chester; Diane L. Larsen
Source:
Veterinary parasitology 2014 v.201 no.3-4 pp. 212-215
ISSN:
0304-4017
Subject:
Ctenocephalides canis; adults; dog diseases; dogs; egg production; eggs; insect infestations; oral administration
Abstract:
... The efficacy of orally administered afoxolaner against adult dog fleas, Ctenocephalides canis, was evaluated in a controlled, blinded study. A total of 32 dogs were infested with 100 adult unfed fleas approximately 24h prior to treatment and then at weekly intervals for 5 weeks after treatment. Live fleas were counted upon removal at 12h (for 16 dogs) and 24h (for the remaining 16 dogs) after trea ...
DOI:
10.1016/j.vetpar.2014.02.014

42. Cytochrome P450 gene CYP337 and heritability of fitness traits in the Glanville fritillary butterfly

Author:
M. A. Jong; S. C. Wong; R. Lehtonen; I. Hanski
Source:
Molecular ecology 2014 v.23 no.8 pp. 1994-2005
ISSN:
0962-1083
Subject:
Lepidoptera; arthropods; butterflies; cages; cytochrome P-450; egg production; eggs; genes; genetic polymorphism; genetic variation; heritability; host plants; larvae; larval development; life history; plant adaptation; variance
Abstract:
... Fitness‐related life history traits often show substantial heritable genetic variation in natural populations, but knowledge of the genetic architecture of these traits is limited. In the Glanville fritillary butterfly, we measured the heritability of key life history traits in a large outdoor population cage during 2 years and generations and combined this experiment with an association study of ...
DOI:
10.1111/mec.12697
PubMed:
24552294

43. Dealing with the presence of the ciliate Euplotes sp. in cultures of the copepod Acartia tonsa

Author:
Guillaume Drillet; Jörg Dutz
Source:
Aquaculture international 2014 v.22 no.2 pp. 391-398
ISSN:
0967-6120
Subject:
foods; fatty acid composition; live feeds; unsaturated fatty acids; carbon; food availability; Acartia tonsa; hatching; egg production; pests; Rhodomonas; eggs; Ciliophora; mortality
Abstract:
... Ciliates in live feed cultures can be a pest that lower production yields. This could dramatically affect the management and success of copepod cultures. In this study, we investigated the effect of the ciliate Euplotes sp. on egg production, specific egg production and egg hatching success of Acartia tonsa fed with Rhodomonas salina. We found that at a concentration of 2 cells ml⁻¹, Euplotes sp. ...
DOI:
10.1007/s10499-013-9647-4

44. Demonstration of persistent contamination of a cooked egg product production facility with Salmonella enterica serovar Tennessee and characterization of the persistent strain

Author:
D. Jakočiūnė; M. Bisgaard; K. Pedersen; J.E. Olsen
Source:
Journal of applied microbiology 2014 v.117 no.2 pp. 547-553
ISSN:
1364-5072
Subject:
Salmonella enterica; biofilm; culture media; egg production; egg products; enzymes; hatching; hydrogen sulfide; multilocus sequence typing; pasteurization; pulsed-field gel electrophoresis; serotypes; Tennessee
Abstract:
... AIMS: The aim of this study was to investigate whether continuous contamination of light pasteurized egg products with Salmonella enterica serovar Tennessee (S. Tennessee) at a large European producer of industrial egg products was caused by persistent contamination of the production facility and to characterize the persistent strains. METHODS AND RESULTS: Seventy‐three S. Tennessee isolates colle ...
DOI:
10.1111/jam.12536

45. Development of an oriC vector for use in Mycoplasma synoviae

Author:
Muhammad A. Shahid; Marc S. Marenda; Philip F. Markham; Amir H. Noormohammadi
Source:
Journal of microbiological methods 2014 v.103 pp. 70-76
ISSN:
0167-7012
Subject:
Mycoplasma synoviae; egg production; financial economics; gene targeting; genetic engineering; genetic vectors; homologous recombination; pathogens; plasmids; poultry; replication origin; resistance genes; synovitis; tetracycline; virulence
Abstract:
... Mycoplasma synoviae, an important poultry pathogen, belonging to the class Mollicutes, causes airsacculitis, synovitis, decreased egg production and produces significant economic losses. Efforts to determine M. synoviae virulence factors and their role in pathogenicity require suitable tools for genetic manipulation of this pathogen. This study describes, for the first time, the identification and ...
DOI:
10.1016/j.mimet.2014.05.014

46. Developmental exposure of zebrafish (Danio rerio) to bisphenol-S impairs subsequent reproduction potential and hormonal balance in adults

Author:
Mohammad Naderi; Marian Y.L. Wong; Fatemeh Gholami
Source:
Aquatic toxicology 2014 v.148 pp. 195-203
ISSN:
0166-445X
Subject:
Danio rerio; adults; adverse effects; bisphenol A; body length; egg production; eggs; endocrine system; estradiol; females; fish; fish development; gonadosomatic index; hatching; hepatosomatic index; males; rearing; sex ratio; spawning; spermatozoa; tanks; testosterone; triiodothyronine; vitellogenin
Abstract:
... In the recent years, there has been a growing concern about the production and use of bisphenol-A substitute, namely bisphenol-S (BPS). Due to its novel nature, there have been few studies addressing the ability of BPS to disrupt the endocrine system of animals. In the present study, zebrafish (Danio rerio) embryos were exposed to and reared in various concentrations of BPS (0, 0.1, 1, 10 and 100μ ...
DOI:
10.1016/j.aquatox.2014.01.009

47. Diel behaviour and time budget of the adult pine weevil Hylobius abietis

Author:
Frauke Fedderwitz; Niklas Björklund; Velemir Ninkovic; Göran Nordlander
Source:
Physiological entomology 2014 v.39 no.2 pp. 103-110
ISSN:
0307-6962
Subject:
Hylobius abietis; Picea abies; adults; egg production; females; forest regeneration; girdling; locomotion; males; plant response; seedlings; Europe
Abstract:
... The pine weevil [Hylobius abietis (L.); Coleoptera: Curculionidae] has a high economic impact on forest regeneration in Europe. The general biology of the pine weevil has received considerable attention, although there is insufficient knowledge about its diel behaviour and time budget. Therefore, in the present study, the feeding and locomotion behaviour of individual adult weevils on Norway spruc ...
DOI:
10.1111/phen.12053

48. Dietary Manganese Supplementation Influences the Expression of Transporters Involved in Iron Metabolism in Chickens

Author:
Shiping Bai; Lirong Huang; Yuheng Luo; Leilei Wang; Xuemei Ding; Jianping Wang; Qiufeng Zeng; Keying Zhang
Source:
Biological trace element research 2014 v.160 no.3 pp. 352-360
ISSN:
0163-4984
Subject:
blood serum; diet; duodenum; egg production; eggs; gene expression; heart; hens; iron; liver; manganese; messenger RNA; metabolism; tibia; transporters
Abstract:
... To investigate the effects of dietary manganese (Mn) supplementation on iron (Fe) metabolism, a total of 480 50-week-old hens were fed the basal diet (control, 24.35 mg Mn/kg) without Mn supplementation for 6 weeks to reduce Mn storage in the body. Hens were then randomly assigned to one of three treatments, which included the control and control added with 60 or 300 mg Mn/kg diet (M-Mn or H-Mn). ...
DOI:
10.1007/s12011-014-0073-x
PubMed:
25037067

49. Dietary effects on egg production, egg‐hatching rate and female life span of the tropical calanoid copepod Acartia bilobata

Author:
Yen‐Ju Pan; Sami Souissi; Anissa Souissi; Cheng‐Han Wu; Shin‐Hong Cheng; Jiang‐Shiou Hwang
Source:
Aquaculture research 2014 v.45 no.10 pp. 1659-1671
ISSN:
1355-557X
Subject:
Acartia; Isochrysis galbana; Nannochloropsis; Tetraselmis chuii; aquaculture feeds; diet; egg production; eggs; fish larvae; hatching; industry; live feeds; longevity
Abstract:
... Copepods are crucial source of live feeds in the aquaculture industry. In particular, several species of the genus Acartia are considered optimal prey for fish larvae. The species Acartia bilobata has excellent potential for marine larvae culture, as it is easy for mass culture. This study investigated the effects of various algal diets on the egg production and egg‐hatching rate of A. bilobata. T ...
DOI:
10.1111/are.12113

50. Dietary vitamin E in White Leghorn layer breeder hens: a strategy to combat aflatoxin B1-induced damage

Author:
Wajid Arshad Khan; Muhammad Zargham Khan; Ahrar Khan; Zahoor Ul Hassan; Shahid Rafique; Muhammad Kashif Saleemi; Abdul Ahad
Source:
Avian pathology 2014 v.43 no.5 pp. 389-395
ISSN:
1465-3338
Subject:
White Leghorn; aflatoxin B1; diet; egg production; eggs; erythrocytes; hens; humans; progeny; protective effect; vitamin E
Abstract:
... Mycotoxins are unavoidable contaminants of animal and human feed and food respectively. This study was designed to investigate the protective activity of vitamin E (Vit E) in White Leghorn breeder hens and their progeny against aflatoxin B ₁ (AFB ₁)-induced damage. The results indicated a significant decrease in egg production and quality in the groups exposed to dietary AFB ₁. A detectable amount ...
DOI:
10.1080/03079457.2014.943691