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You searched for: Journal Animal reproduction science Remove constraint Journal: Animal reproduction science Publication Year 2009 Remove constraint Publication Year: 2009 Source 2009 v.113 no.1-4 Remove constraint Source: 2009 v.113 no.1-4
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21. Porcine Aurora A accelerates Cyclin B and Mos synthesis and promotes meiotic resumption of porcine oocytes

Author:
Nishimura, Yukio; Endo, Tsutomu; Kano, Kiyoshi; Naito, Kunihiko
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 114-124
ISSN:
0378-4320
Subject:
non-specific serine/threonine protein kinase; oocytes; germinal vesicle; meiosis; biochemical pathways; protein synthesis; protein phosphorylation; cyclins; messenger RNA; gene expression; in vitro studies; sows; clones
Abstract:
... Full-grown oocytes arrested at germinal vesicle stage contain many dormant maternal mRNAs, and Aurora A has been reported to play a key role for the translation of these maternal mRNAs in Xenopus oocytes. Although the presence of Aurora A has been reported in mammals, the functions of Aurora A on the protein synthesis and the meiotic resumption have never been elucidated in mammalian oocytes. In t ...
DOI:
10.1016/j.anireprosci.2008.05.074
PubMed:
18614302

22. Prediction of the estrous cycle and optimal insemination time by monitoring vaginal electrical resistance (VER) in order to improve the reproductive efficiency of the Okinawan native Agu pig

Author:
Yamauchi, Shogo; Nakamura, Satoshi; Yoshimoto, Teppei; Nakada, Tadashi; Ashizawa, Koji; Tatemoto, Hideki
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 311-316
ISSN:
0378-4320
Subject:
swine; swine breeds; rare breeds; female reproductive system; estrus; estrus detection; electrophysiology; vagina; evoked potentials; bioelectrical impedance; hormone secretion; luteinizing hormone; validity; artificial insemination; female fertility; reproductive efficiency; Japan
Abstract:
... The present study was conducted to determine whether vaginal electrical resistance (VER) can be exploited to improve the low reproductive efficiency of the rare Okinawan native Agu pig, in which estrous signs are difficult to ascertain by visual observation. The lowest VER (272.0±12.4units, n =5) and the preovulatory LH surge were detected at 57.6±5.3 and 36.8±9.6h before the onset of estrus, resp ...
DOI:
10.1016/j.anireprosci.2008.08.005
PubMed:
18789615

23. Preparation and ultrastructure of spermatozoa from Green Poison Frogs, Dendrobates auratus, following hormonal induced spermiation (Amphibia, Anura, Dendrobatidae)

Author:
Lipke, Christian; Meinecke-Tillmann, Sabine; Meyer, Wilfried; Meinecke, Burkhard
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 177-186
ISSN:
0378-4320
Subject:
frogs; Anura; endangered species; animal reproduction; spermatozoa; acrosome; cell nucleus; flagellum; ultrastructure; in vivo studies; hormonal regulation; spermiation; human chorionic gonadotropin; histology; differential staining; transmission electron microscopy; scanning electron microscopy; phylogeny; Panama
Abstract:
... Few ultrastructural studies have been performed on members of the Dendrobatidae, although such investigations can be useful for the understanding of reproductive patterns, as a diagnostic method for males in breeding programs for endangered amphibians and for phylogenetic analysis. The sperm ultrastructure of the Green Poison Frog, Dendrobates auratus, from Panama is described following induced sp ...
DOI:
10.1016/j.anireprosci.2008.06.005
PubMed:
18657373

24. Relationship between uterine morphology and peripheral concentrations of sex steroid hormone in wild Japanese black bears (Ursus thibetanus japonicus)

Author:
Yamane, Masako; Yamamoto, Yoshio; Tsujimoto, Tsunenori; Osawa, Takeshi
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 251-262
ISSN:
0378-4320
Subject:
Ursus; endangered species; endometrium; corpus luteum; morphogenesis; cell proliferation; hormone secretion; sex hormones; estradiol; progesterone; seasonal variation; breeding season; proliferating cell nuclear antigen; blood plasma; chemical concentration
Abstract:
... Developing a better understanding of the reproductive physiology and breeding condition peculiar to wild Japanese black bears (Ursus thibetanus japonicus) is crucial for estimation of their habitat distribution. The aim of this study was to clarify the changes in morphology of the genital organs, cellular proliferation in the endometrium and sex steroid hormone concentrations along with the reprod ...
DOI:
10.1016/j.anireprosci.2008.08.004
PubMed:
18790579

25. Relationship of cryptorchidism with sex ratios and litter sizes in 12 dog breeds

Author:
Gubbels, Ed.J.; Scholten, Janneke; Janss, Luc; Rothuizen, Jan
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 187-195
ISSN:
0378-4320
Subject:
dogs; dog diseases; cryptorchidism; genetic disorders; carrier state; risk assessment; complications; sex ratio; males; females; male fertility; female fertility; pregnancy outcome; litter size; dog breeds; breed differences; linkage (genetics); sex linkage; epidemiological studies; Netherlands
Abstract:
... The aim of this study was to identify the influence of genetic carriership for cryptorchidism on litter sizes and sex ratios in the offspring. Weaning data of 11,230 litters in 12 purebred dog breeds were evaluated. Parents were classified as cryptorchidism 'carriers' (C) when at least one of their offspring was found cryptorchid. Subsequently the effects of 'carrier' and 'non-carrier' (NC) parent ...
DOI:
10.1016/j.anireprosci.2008.07.004
PubMed:
18684574

26. Relationships between ovarian blood flow and ovarian response to eCG-treatment of dairy cows

Author:
Honnens, A.; Niemann, H.; Herzog, K.; Paul, V.; Meyer, H.H.D.; Bollwein, H.
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 1-10
ISSN:
0378-4320
Subject:
dairy cows; superovulation; hormonal regulation; equine chorionic gonadotropin; follicular development; corpus luteum; luteinization; biomarkers; arteries; hemodynamics; blood flow; validity; ultrasonography
Abstract:
... The goal of the present study was to investigate ovarian blood flow and ovarian response in cows undergoing a gonadotropin treatment to induce a superovulatory response, using transrectal colour Doppler sonography. Forty-two cows including 19 cross-bred, 14 German Holstein and 9 German Black Pied cows were examined sonographically before hormonal stimulation on Day 10 of the oestrous cycle, three ...
DOI:
10.1016/j.anireprosci.2008.05.077
PubMed:
18619746

27. Reproductive performance of swine females re-serviced after return to estrus or abortion

Author:
Vargas, Anamaria J.; Bernardi, Mari L.; Paranhos, Tiago F.; Gonçalves, Marcio A.D.; Bortolozzo, Fernando P.; Wentz, Ivo
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 305-310
ISSN:
0378-4320
Subject:
pregnancy; estrus; reproductive disorders; abortion (animals); sows; gilts; parity (reproduction); puberty; weanlings; reproductive efficiency; farrowing rate; pregnancy outcome; risk assessment; culling (animals); risk factors
Abstract:
... The objective of this study was to analyze reproductive performance in swine females re-serviced after return to estrus or abortion in comparison with females in first service (gilts or weaned females). Records used were obtained from four commercial sow herds in Brazil including 24,194 mating records from PigCHAMP® research database. Three mating categories (first service in gilts or weaned sows, ...
DOI:
10.1016/j.anireprosci.2008.06.006
PubMed:
18657372

28. Seminal traits, suitability for semen preservation and fertility in the native Portuguese horse breeds Puro Sangue Lusitano and Sorraia: Implications for stallion classification and assisted reproduction

Author:
Gamboa, Sandra; Machado-Faria, Manuel; Ramalho-Santos, João
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 102-113
ISSN:
0378-4320
Subject:
stallions; horse breeds; spermatozoa; male fertility; artificial insemination; germplasm conservation; cooling; germplasm evaluation; germplasm screening; sperm motility; pH; breed differences; animal characteristics; Portugal
Abstract:
... The Puro Sangue Lusitano (PSL) is the major national breed of horse in Portugal, but no studies exist on its seminal characteristics, or on the possibility of conserving semen for future use. The aim of this study was to evaluate semen parameters, fertility and the aptness to semen preservation in Lusitano Stallions. In order to compare characteristics defined by a single or by multiple semen coll ...
DOI:
10.1016/j.anireprosci.2008.06.004
PubMed:
18632230

29. Short-term nutritional treatments grazing legumes or feeding concentrates increase prolificacy in Corriedale ewes

Author:
Viñoles, C.; Meikle, A.; Martin, G.B.
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 82-92
ISSN:
0378-4320
Subject:
Corriedale; ewes; estrus synchronization; hormonal regulation; prostaglandins; controlled internal drug release devices; drug injection; sheep feeding; grazing; legumes; Lotus corniculatus; dietary supplements; corn; soybean meal; feed concentrates; ovulation; female fertility; litter size
Abstract:
... We tested whether short periods of increased nutrition will improve ovulation rate and prolificacy, irrespective of the method used to synchronise the cycles of the ewes. In Experiment 1, we used 138 Corriedale ewes to evaluate two factors: synchronization treatment (sponges versus a single injection of prostaglandin) and type of pasture (native versus improved with Lotus corniculatus). Ewes were ...
DOI:
10.1016/j.anireprosci.2008.05.079
PubMed:
18639397

30. Standardization and validation of an induced ovulation model system in buffalo cows: Characterization of gene expression changes in the periovulatory follicle

Author:
Jyotsna, U.R.; Medhamurthy, R.
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 71-81
ISSN:
0378-4320
Subject:
buffaloes; females; ovulation; ovarian follicles; follicular development; biochemical mechanisms; hormonal regulation; gene expression; human chorionic gonadotropin; synthetic prostaglandins; oxytocin; hormone secretion; progesterone; estradiol; proteinases; chemical concentration; estrous cycle; reference standards
Abstract:
... In bovines characterization of biochemical and molecular determinants of the dominant follicle before and during different time intervals after gonadotrophin surge requires precise identification of the dominant follicle from a follicular wave. The objectives of the present study were to standardize an experimental model in buffalo cows for accurately identifying the dominant follicle of the first ...
DOI:
10.1016/j.anireprosci.2008.08.001
PubMed:
18771864

31. Strategies to optimize reproductive efficiency by regulation of ovarian function in yak (Poephagus grunniens L.)

Author:
Sarkar, M.; Dutta Borah, B.K.; Prakash, B.S.
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 205-211
ISSN:
0378-4320
Subject:
yaks; estrus synchronization; estrus; ovulation; hormonal regulation; methodology; drug injection; synthetic prostaglandins; gonadotropin-releasing hormone; physiological response; biomarkers; follicular development; corpus luteum; progesterone; pregnancy; animal performance; optimization
Abstract:
... Ovulatory response to the first GnRH of Ovsynch is the critical determinant for successful synchronization of ovulation in animals. An attempt was made in this study to design a pre-Ovsynch hormonal strategy in yaks to increase the ovulatory response to the first GnRH injection of Ovsynch so that overall synchronization rate to Ovsynch could be improved. Non-lactating cyclic yak cows (n =33) were ...
DOI:
10.1016/j.anireprosci.2008.07.005
PubMed:
18691837

32. Studies on effect of Booroola (FecB) genotype on lifetime ewes' productivity efficiency, litter size and number of weaned lambs in GarolexMalpura sheep

Author:
Mishra, A.K.; Arora, A.L.; Kumar, S.; Prince, L.L.L.
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 293-298
ISSN:
0378-4320
Subject:
lambs; ewes; sheep breeds; crossbreds; animal genetics; genotype; reproductive traits; genes; mutation; animal performance; longevity; reproductive efficiency; pregnancy outcome; fecundity; multiple births; litter size; litter weight; weanlings; weaning
Abstract:
... The FecB gene of Garole was introgressed into non-prolific Malpura sheep. The present study was conducted to evaluate the effects of FecB genotypes on cumulative lifetime (three lamb crops) litter size (CLS), cumulative number of weaned lambs (CWL) and cumulative ewe's productivity efficiency (CEPE) in 51 GarolexMalpura (GM) crossbred sheep. The GM ewes of F₁ were selected and screened for FecB mu ...
DOI:
10.1016/j.anireprosci.2008.06.002
PubMed:
18620822

33. Supplementary artificial light to increase egg production of geese under natural lighting conditions

Author:
Wang, Chin-Meng; Chen, Lih-Ren; Lee, Shuen-Rong; Jea, Yu-Shine; Kao, Jung-Yie
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 317-321
ISSN:
0378-4320
Subject:
geese; poultry production; egg production; female reproductive system; ovulation; photoperiod; photoperiodism; breeding season; tropics; animal housing; supplementary lighting; physiological response; female fertility; laying performance; optimization; Taiwan
Abstract:
... A new supplementary lighting program was designed to increase the egg production of geese under natural light conditions. The objective of this study was to evaluate the effects of the supplementary lighting program on egg production of White Roman geese in an open housing system at the Tropic of Cancer. Forty mature White Roman geese were randomly allocated into two groups (male:female=1:4). The ...
DOI:
10.1016/j.anireprosci.2008.05.073
PubMed:
18789617

34. The effect of VEGF on the temporal-spatial change of α-tubulin and cortical granules of ovine oocytes matured in vitro

Author:
Cao, Xin; Zhou, Ping; Luo, Hailing; Zhao, Youzhang; Shi, Guoqing
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 236-250
ISSN:
0378-4320
Subject:
ewes; in vitro fertilization; oocytes; biological development; germinal vesicle; cortical granules; microtubules; tubulin; metaphase; cell nucleus; cytoplasm; temporal variation; spatial variation; biochemical mechanisms; vascular endothelial growth factors; culture media
Abstract:
... The effects of vascular endothelial growth factor (VEGF) on the temporal-spatial change of α-tubulin and cortical granules (CGs) in ovine oocytes matured in vitro were studied using human recombinant VEGF₁₆₅ at 5ng/ml in maturation media. Immunofluorescence, confocal microscopy and orcein staining were used to evaluate cell cycle-dependent modifications in nuclear configuration, quality of the met ...
DOI:
10.1016/j.anireprosci.2008.08.013

35. Thermoresistance sperm tests are not predictive of potential fertility for cryopreserved bull semen

Author:
Vianna, F.P.; Papa, F.O.; Zahn, F.S.; Melo, C.M.; Dell'Aqua, J.A.
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 279-282
ISSN:
0378-4320
Subject:
bulls; artificial insemination; germplasm conservation; spermatozoa; semen; cryopreservation; male fertility; prediction; freeze-thaw cycles; thawing; testing; cold tolerance; freezing quality; sperm motility; validity; accuracy; germplasm evaluation; germplasm screening
Abstract:
... Different studies demonstrate positive correlations between seminal variables determined in the laboratory and subsequent fertility after artificial insemination. It is clear, however, that there is still a deficiency in predicting in vivo fertility results of semen samples. The present study intended to verify the efficiency of rapid and slow thermoresistance tests in predicting fertility of froz ...
DOI:
10.1016/j.anireprosci.2008.06.009
PubMed:
18707830

36. Validation of trans-rectal ultrasonography for counting preovulatory follicles in weaned sows

Author:
Bolarin, Alfonso; Vazquez, Juan M.; Parrilla, Inmaculada; Vazquez, Jose L.; Martinez, Emilio A.; Roca, Jordi
Source:
Animal reproduction science 2009 v.113 no.1-4 pp. 137-142
ISSN:
0378-4320
Subject:
sows; weanlings; ovulation; ovarian follicles; follicular development; detection; monitoring; image analysis; ultrasonography; rectum; validity; accuracy; biological development; dimensions; estimation
Abstract:
... The present study investigated the accuracy of trans-rectal ultrasonography (TRU) for assessing the exact number of preovulatory follicles (POFs, with a diameter from 6 to 10mm) present in the ovaries of weaned sows. The ovaries of 63 hormonally treated (1500IU of eCG) weaned sows were checked with TRU (7.5-MHz multiple scan angle transducer) in two successive scanning sessions performed at 26-27 ...
DOI:
10.1016/j.anireprosci.2008.07.002
PubMed:
18684575