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: Subject term food availability Remove constraint Subject term: food availability Subject term condition factor Remove constraint Subject term: condition factor
Start Over

Search

23  Search Results

« Previous | 1 - 20 of 23 |
Number of results to display per page

Search Results

1. Effects of biological and environmental factors on the variability of Paralonchurus brasiliensis (Sciaenidae) density: An GAMLSS application

Author:
Eudriano F.S. Costa; Gustavo M. Teixeira; Fúlvio A.M. Freire; June F. Dias; Adilson Fransozo
Source:
Journal of sea research 2022 v.183 pp. 102203
ISSN:
1385-1101
Subject:
Paralonchurus brasiliensis; biomass; condition factor; environmental indicators; fish; fish communities; fisheries; food availability; hepatosomatic index; keystone species; models; organic matter; population density; population dynamics; repletion; research; resource management; salinity; sex ratio; water temperature
Abstract:
... The hypothesis of this study was based on the premise that complex interactions between biological and environmental factors may explain variability in fish population dynamics. To test this, Paralonchurus brasiliensis (Sciaenidae), a keystone species associated with coastal waters, was used as a model fish species. Generalized Additive Models for Location, Scale and Shape were performed to evalua ...
DOI:
10.1016/j.seares.2022.102203

2. Food and initial size influence overwinter survival and condition of a juvenile marine fish (age-0 Atlantic cod)

Author:
Emilie A. Geissinger; Robert S. Gregory; Benjamin J. Laurel; Paul V.R. Snelgrove
Source:
Canadian journal of fisheries and aquatic sciences 2021 v.78 no.4 pp. 472-482
ISSN:
1205-7533
Subject:
Gadus morhua; condition factor; food availability; juveniles; marine fish; mortality; overwintering; starvation; winter; young of the year
Abstract:
... In subarctic Newfoundland, age-0 Atlantic cod (Gadus morhua) settle into coastal habitats in several summer–autumn pulses, resulting in broad length-frequency distributions before winter. Low winter temperatures and potential decreases in food availability pose challenges for young-of-year fish. To examine how size variation affects overwintering success under contrasting food scenarios, we conduc ...
DOI:
10.1139/cjfas-2020-0142

3. Full compensatory growth before harvest and no impact on fish welfare in Atlantic salmon after an 8-week fasting period

Author:
Malthe Hvas; Jonatan Nilsson; Tone Vågseth; Velimir Nola; Per Gunnar Fjelldal; Tom Johnny Hansen; Frode Oppedal; Lars Helge Stien; Ole Folkedal
Source:
Aquaculture 2022 v.546 pp. 737415
ISSN:
0044-8486
Subject:
Salmo salar; animal welfare; aquaculture; compensatory growth; condition factor; feed intake; food availability; models; radiology; salmon
Abstract:
... Individually tagged Atlantic salmon postsmolts (≈1200 g, 46 cm) reared in triplicate indoor holding tanks were fasted for 8 weeks at 12 °C and subsequently refed for 5 weeks, whereafter they were transferred to triplicate sea cages in a common garden setup together with a continuously fed control group until harvest size of ≈6100 g and 73 cm. At the end of the fasting period fish had lost 7.3% mas ...
DOI:
10.1016/j.aquaculture.2021.737415

4. Wild longnose dace downstream of wastewater treatment plants display an obese phenotype

Author:
Analisa Lazaro-Côté; Erin Faught; Leland J. Jackson; Mathilakath M. Vijayan
Source:
Environmental pollution 2021 v.285 pp. 117363
ISSN:
0269-7491
Subject:
Rhinichthys cataractae; anthropogenic stressors; biochemical pathways; condition factor; food availability; glycogen; indigenous species; liver; metabolites; obesity; phenotype; transcription (genetics); transcriptomics; triacylglycerols; wastewater; wastewater treatment; wild fish
Abstract:
... Wild fish living downstream of wastewater treatment plants (WWTPs) often have increased body condition factors or body mass indices compared to upstream fish. This observation has been largely attributed to increased nutrient loading and food availability around wastewater effluent outflows. While a higher condition factor in fish is generally considered a predictor of healthy ecosystems, the meta ...
DOI:
10.1016/j.envpol.2021.117363

5. Liver Lipid Accumulation in European Bullhead (Cottus cobio) from a High-Mountain Lake: An Adaptive Strategy to Survive the Adverse Winter Season

Author:
Paolo Pastorino; Marco Bertoli; Manuel Kušće; Piero Giulio Giulianini; Vasco Menconi; Marino Prearo; Elisabetta Pizzul
Source:
Diversity 2020 v.12 no.12 pp. -
ISSN:
1424-2818
Subject:
Cottus gobio; Gobio; altitude; area; condition factor; fatty liver; fish; food availability; gonadosomatic index; hepatosomatic index; histology; lakes; lipids; liver; metabolism; population; streams; summer; water temperature; winter; Italy
Abstract:
... The hypothesis that liver lipid accumulation in fish is an adaptive strategy to survive the winter in the high-altitude environment was assessed in this study. During summer 2019, specimens of Cottus gobio were sampled in 15 watercourses of Friuli Venezia-Giulia Region (Italy) to verify if hepatic steatosis is or not normally present in the species. To do this, hepatic vacuolization was assessed b ...
DOI:
10.3390/d12120442

6. The utilization of cold-water zooplankton as prey for chum salmon fry (Oncorhynchus keta) in Yamada Bay, Iwate, Pacific coast of northern Japan

Author:
Yuichiro Yamada; Kei Sasaki; Kodai Yamane; Miwa Yatsuya; Yuichi Shimizu; Yoshitomo Nagakura; Tadahide Kurokawa; Hideki Nikaido
Source:
Regional studies in marine science 2019 v.29 pp. 100633
ISSN:
2352-4855
Subject:
Decapoda; Oncorhynchus keta; adults; coastal water; coasts; community structure; condition factor; food availability; larvae; marine science; nutritional status; salmon; stomach; water temperature; zooplankton; Japan; Pacific Ocean
Abstract:
... The food availability of chum salmon fry is one of the principal factors affecting survival in their coastal residence period. The aim of this study was to better understand the quality and quantity of available food resources and the feeding habits of salmon fry in nearshore waters. We examined stomach contents of salmon fry and the zooplankton community structure of the water column during salmo ...
DOI:
10.1016/j.rsma.2019.100633

7. Do environmental factors affect male fathead minnow (Pimephales promelas) response to estrone? Part 2. Temperature and food availability

Author:
N.W. Shappell; D.J. Feifarek; D.C. Rearick; S.E. Bartell; H.L. Schoenfuss
Source:
Science of the total environment 2018 v.610-611 pp. 32-43
ISSN:
0048-9697
Subject:
Pimephales promelas; bioactive properties; blood glucose; condition factor; cortisol; endocrine-disrupting chemicals; environmental factors; estrone; fish; food availability; gonadosomatic index; hematocrit; histology; liver; males; morphometry; spermatozoa; temperature; testes; vitellogenin
Abstract:
... Fish are subject to constantly changing environmental conditions and food availability, factors that may impact their response to endocrine disruptors (EDs). This may, in part, explain outcome discrepancies between field studies and laboratory exposures to EDs. This study assessed whether standard laboratory conditions for fish exposures adequately represent effects of ED exposure at two environme ...
Handle:
10113/5801886
DOI:
10.1016/j.scitotenv.2017.08.021

8. Effects of selenium on benthic macroinvertebrates and fathead minnow (Pimephales promelas) in a boreal lake ecosystem

Author:
Stephanie D. Graves; Karsten Liber; Vince Palace; Markus Hecker; Lorne E. Doig; David M. Janz
Source:
Ecotoxicology and environmental safety 2019 v.182 pp. 109354
ISSN:
0147-6513
Subject:
Chironomidae; Gammaridae; Pimephales promelas; aquatic ecosystems; aquatic invertebrates; biomass; condition factor; exposure duration; females; fish; food availability; lakes; macroinvertebrates; risk; risk assessment; selenites; selenium; sexual maturity; sustainable development; toxicity; trophic levels; Ontario
Abstract:
... Selenium (Se) is a contaminant of concern in many aquatic ecosystems due to its narrow range between essentiality and toxicity in oviparous (yolk-bearing) vertebrates. The objective of the present study was to determine the effects of Se, experimentally added to in situ limnocorrals as selenite, on invertebrate communities and fathead minnow (Pimephales promelas) at environmentally realistic Se co ...
DOI:
10.1016/j.ecoenv.2019.06.037

9. Net cages enhance golden mussel (Limnoperna fortunei) larval density and condition factor

Author:
Daercy Maria Monteiro de Rezende Ayroza; Clovis Ferreira do Carmo; Antonio Fernando Monteiro Camargo; Márcia Divina de Oliveira; Maria Letizia Petesse
Source:
Freshwater biology 2019 v.64 no.9 pp. 1593-1602
ISSN:
0046-5070
Subject:
Limnoperna fortunei; Oreochromis niloticus; adults; aquatic environment; chlorophyll; cold; condition factor; fish cages; fish culture; fish farms; fish production; food availability; invasive species; larvae; mussels; nitrites; nutritional status; principal component analysis; rivers; statistical models; total phosphorus; variance; Brazil
Abstract:
... Cage fish farming is an important economic activity in Brazil where tilapia (Oreochromis niloticus) is the main cultivated species. To investigate the cage fish farm as a vector for golden mussel invasion, we hypothesised that: (1) Limnoperna fortunei, a freshwater bivalve mollusc, finds greater food availability in the cage fish farm; (2) the cage fish farm favours mollusc colonisation and its nu ...
DOI:
10.1111/fwb.13355

10. Assessment of multiple stressors on the growth of larval green sturgeon Acipenser medirostris: implications for recruitment of early life‐history stages

Author:
Jamilynn B. Poletto; Benjamin Martin; Eric Danner; Sarah E. Baird; Dennis E. Cocherell; Natnael Hamda; Joseph J Cech, Jr; Nann A. Fangue
Source:
Journal of fish biology 2018 v.93 no.5 pp. 952-960
ISSN:
0022-1112
Subject:
Acipenser medirostris; climate change; condition factor; energy metabolism; food availability; juveniles; larval development; life history; sturgeon; temperature
Abstract:
... Early developmental stages of fishes are particularly sensitive to changes in environmental variables that affect physiological processes such as metabolism and growth. Both temperature and food availability have significant effects on the growth and survival of larval and juvenile fishes. As climate change and anthropogenic disturbances influence sensitive rearing environments of fishes it is unl ...
DOI:
10.1111/jfb.13805

11. Development and Field Application of a Model Predicting Effects of Episodic Hypoxia on Short‐Term Growth of Spot

Author:
Lindsay A. Campbell; James A. Rice
Source:
Marine and coastal fisheries 2017 v.9 no.1 pp. 504-520
ISSN:
1942-5120
Subject:
Leiostomus xanthurus; RNA; animal growth; condition factor; direct contact; dissolved oxygen; estuaries; fauna; fish; food availability; gene expression; hepatosomatic index; hypoxia; insulin-like growth factor I; juveniles; liver; muscle tissues; oxygen; rivers; specific growth rate; summer; temporal variation; water quality; North Carolina
Abstract:
... In North Carolina and elsewhere, there is concern that excessive nutrient loading and resulting hypoxic conditions in coastal ecosystems are adversely affecting the native fauna, but quantifying the effects on fish can be difficult. Hypoxia may reduce fish growth via direct exposure or indirectly (e.g., cost of low‐oxygen avoidance, reduced food availability, and density‐dependent effects in oxyge ...
DOI:
10.1080/19425120.2017.1362492

12. Difference on reproductive trait of skipjack tuna Katsuonus pelamis female between schools (free vs FAD school) in the tropical western and central Pacific Ocean

Author:
Hiroshi Ashida; Toshiyuki Tanabe; Nobuhiro Suzuki
Source:
Environmental biology of fishes 2017 v.100 no.8 pp. 935-945
ISSN:
0378-1909
Subject:
Katsuwonus pelamis; aggregation behavior; condition factor; females; fish; food availability; oogenesis; reproductive traits; schools; sex ratio; spawning; Pacific Ocean
Abstract:
... In order to clarify the difference on reproductive traits of female skipjack tuna between fish aggregation device (FAD) and free-swimming (Free) school, we examined the relative condition factor and sex ratio, minimum size at first maturity and spawning fraction in tropical western and central Pacific Ocean. The relative condition factor in developing (FAD: 1.00 ± 0.06, Free: 1.05 ± 0.07) and spaw ...
DOI:
10.1007/s10641-017-0621-2

13. Length-Weight Relationship and Condition Factor of Crayfish from South Sorong and Jayawijaya, Papua, Indonesia

Author:
Jean Marlin Weya; Nanda Sendy Rumbiak; Sucipto Hariyanto; Bambang Irawan; Agoes Soegianto
Source:
Croatian journal of fisheries 2017 v.75 no.1 pp. 18-24
ISSN:
1848-0586
Subject:
Cherax; condition factor; crayfish; fisheries; food availability; habitats; Indonesia
Abstract:
... The objectives of this study were to investigate the length-weight relationship and condition factor of crayfish living in the natural habitat of South Sorong and Jayawijaya Regencies, Papua, Indonesia. Three species of crayfish (Cherax monticola, C. albertisii and C. communis) were collected from Jayawijaya Regency and only one species of crayfish (C. swonden) was collected from South Sorong Rege ...
DOI:
10.1515/cjf-2017-0004

14. Year-class strength, physical fitness and recruitment cycles in vendace (Coregonus albula)

Author:
Thomas Axenrot; Erik Degerman
Source:
Fisheries research 2016 v.173 pp. 61-69
ISSN:
0165-7836
Subject:
Coregonus; basins; condition factor; energy; environmental factors; fish; fisheries; food availability; gonads; lakes; nutrient content; physical fitness; population density; sexual maturity; species recruitment; time series analysis; Eurasia; Sweden
Abstract:
... Vendace, an obligate zoo-planktivore through all life stages, is a key-stone species in many large lakes in northern Eurasia. Vendace often produces strong year-classes in cycles of various length. To better understand the factors that determine the emergence of strong year-classes we analyzed long time-series hydroacoustic data on abundance of young-of-the-year and older vendace, and representati ...
DOI:
10.1016/j.fishres.2015.03.017

15. Reproductive patterns of blacktail comber (Serranus atricauda, Serranidae) from south-west Portugal seamounts

Author:
Ana Neves; Vera Sequeira; Rafaela Barros Paiva; Ana Rita Vieira; Leonel Serrano Gordo
Source:
Helgoland marine research 2014 v.68 no.1 pp. 133-142
ISSN:
1438-387X
Subject:
Serranus; condition factor; energy; environmental factors; fecundity; fish; food availability; gonadosomatic index; hepatosomatic index; hermaphroditism; oocytes; population dynamics; spawning; Portugal
Abstract:
... The knowledge of the reproductive strategy is essential for the comprehensive understanding of the population dynamics of any fish species. This study intends to define the spawning season, verify the type of fecundity regulation and estimate relative annual fecundity for Serranus atricauda inhabiting the south-west of Portugal seamounts (Gorringe, Ampère and Lion). Monthly samples, between Septem ...
DOI:
10.1007/s10152-013-0373-0

16. Practical Comparison of Commercial Starter Diets for Feed Training Largemouth Bass Fingerlings

Author:
Isak J. Csargo; Michael L. Brown; Matthew J. Ward
Source:
Journal of applied aquaculture 2013 v.25 no.1 pp. 24-34
ISSN:
1545-0805
Subject:
Micropterus salmoides; condition factor; correlation; feeds; fingerlings; food availability; photoperiod; protein composition; protein energy ratio; starter cultures; starter diets; stocking rate; tanks; water temperature; weaning
Abstract:
... We compared performance (growth, survival, and condition) of northern largemouth bass Micropterus salmoides salmoides fingerlings fed one of three commercial starter feeds: Otohime Marine Weaning (OMW; Marubeni Nisshin Feed), Bio-Oregon BiVita Fry (BVF; Bio-Oregon), and Purina Aquamax Starter (PAS; PMI Nutrition International LLC). Nine 833-L circular tanks, connected in parallel to a recirculatio ...
DOI:
10.1080/10454438.2012.749824

17. Effects of Flow Reduction on a Whitespotted Char Population in a Japanese Mountain Stream

Author:
Tomoyuki Nakamura
Source:
North American journal of fisheries management 2013 v.33 no.6 pp. 1142-1148
ISSN:
1548-8675
Subject:
Salvelinus leucomaenis leucomaenis; aggression; biomass; condition factor; fish; food availability; long term effects; stream flow; streams; Japan
Abstract:
... I evaluated the effects of long-term (about 270 d/year) and large-volume (83.3% at mean flow) reductions in stream flow on a population of Whitespotted Char Salvelinus leucomaenis . I compared a range of biological parameters (density, biomass, condition factor, and age composition) between populations of char in the free-flowing (above dam) and regulated (below dam) sections of a Japanese mountai ...
DOI:
10.1080/02755947.2013.826757

18. Differential effects of elevated nutrient and sediment inputs on survival, growth and biomass of a common larval fish species (Dorosoma cepedianum)

Author:
GONZÁLEZ, MARÍA J.; KNOLL, LESLEY B.; VANNI, MICHAEL J.
Source:
Freshwater biology 2010 v.55 no.3 pp. 654-669
ISSN:
0046-5070
Subject:
Dorosoma cepedianum; adverse effects; aquatic ecosystems; biomass; condition factor; eutrophication; experimental design; fish; food availability; food webs; foraging; gizzard; lakes; land use; larvae; nutrients; omnivores; sediments; subsidies; turbidity; watersheds
Abstract:
... 1. Elevated allochthonous inputs of nutrients and sediments to aquatic ecosystems are associated with eutrophication and sedimentation. Reservoirs receive substantial subsidies of nutrients and sediments from catchments due to their large catchment : lake area ratios. We examined the effect of elevated subsidies of sediments and/or dissolved nutrients on the success (survival, growth, biomass and ...
DOI:
10.1111/j.1365-2427.2009.02304.x

19. Length-structured analysis of the reproductive season of anchovy and common sardine off central southern Chile

Author:
Luis A. Cubillos; Gabriel Claramunt
Source:
Marine biology 2009 v.156 no.8 pp. 1673-1680
ISSN:
0025-3162
Subject:
Engraulis; anchovies; condition factor; egg production; females; food availability; gonadosomatic index; pelagic fish; sardines; seasonal variation; summer; Chile
Abstract:
... The anchovy (Engraulis ringens) and common sardine (Strangomera bentincki) are two small pelagic fish which have a similar reproductive strategy off central southern Chile. The seasonal reproductive dynamics of both the species was investigated by taking into account the gonadosomatic index (GSI) and visual maturity data as a function of female size for the period 1993–1999, and also the seasonal ...
DOI:
10.1007/s00227-009-1202-5

20. The role of the environment in partial migration: food availability affects the adoption of a migratory tactic in brown trout Salmo trutta

Author:
Wysujack, K.; Greenberg, L.A.; Bergman, E.; Olsson, I.C.
Source:
Ecology of freshwater fish 2009 v.18 no.1 pp. 52-59
ISSN:
0906-6691
Subject:
Salmo trutta; condition factor; females; food availability; gene pool; males; migratory behavior; phenotype; phenotypic plasticity; tanks; trout
Abstract:
... Alternative reproductive tactics are commonly reported for salmonids (Pisces) and typically involve large migratory and small resident individuals. Variation in migratory tendency should reflect the different benefits and costs that the two different phenotypes face with regard to fitness. Therefore, the effect of food availability on the adoption of a migratory tactic in brown trout was investiga ...
DOI:
10.1111/j.1600-0633.2008.00322.x