+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Influence of Body Size and Prey Type on the Willingness of Age-0 Fish to Forage under Predation Risk

, : Influence of Body Size and Prey Type on the Willingness of Age-0 Fish to Forage under Predation Risk. Transactions of the American Fisheries Society: 969-975

Ontogenetic diet shifts have been shown to be the outcome of changes either in vulnerability to predators or foraging efficiency for different prey types. More information is needed on how changes in vulnerability and prey value with forager size interact to influence the responses to predation risk. Piscivorous fishes are a significant source of predation risk for many other fish species, but as young of the year (age 0) they themselves are vulnerable to predators. We experimentally compared the foraging behavior of three vulnerable size-classes of largemouth bass Micropterus salmoides with respect to zooplankton, chironomid larvae, and bluegills Lepomis macrochirus when a larger predator was visible and when none were present. The size-classes of age-0 largemouth bass represented a documented ontogenetic diet progression from zooplankton to benthic invertebrates to fish. The size of the largemouth bass influenced their consumption rate and amount of foraging activity in the presence of a predator, but prey type did not. All sizes of largemouth bass reduced their foraging time and total consumption when a larger predator was visible except for age-0 largemouth bass that are typically piscivorous in the wild. Predation risk may affect the ontogeny of piscivory by decreasing the feeding rate on all prey types, changes in vulnerability with size having more influence on risk-taking than foraging efficiency for different prey types.


DOI: 10.1577/T09-098.1

Other references

Geiger, J.R., 1977: Inventorying the urban forest. An account of the method of inventory used by the City [council] of Chicago to estimate tree resources, partly with a view to planning the utilization of timber removals (currently about 4 million ft3/yr). The grid pattern of the city simplified t...

Ryan, N.S.; Nicholas, J.M.; Weston, P.S.J.; Liang, Y.; Lashley, T.; Guerreiro, R.; Adamson, G.; Kenny, J.; Beck, J.; Chavez-Gutierrez, L.; de Strooper, B.; Revesz, T.; Holton, J.; Mead, S.; Rossor, M.N.; Fox, N.C., 2016: Clinical phenotype and genetic associations in autosomal dominant familial Alzheimer's disease: a case series. The causes of phenotypic heterogeneity in familial Alzheimer's disease with autosomal dominant inheritance are not well understood. We aimed to characterise clinical phenotypes and genetic associations with APP and PSEN1 mutations in symptoma...

St-Pierre, Jëlle.; Chadee, K., 2014: How the discovery of TNF-α has advanced gastrointestinal diseases and treatment regimes. Digestive Diseases and Sciences 59(4): 712-715

Riaz, M.; Fawwad, A.; Hydrie, M.Zafar.Iqbal.; Basit, A.; Shera, A.Samad., 2011: Is there any association of serum high-sensitivity C-reactive protein with various risk factors for metabolic syndrome in a healthy adult population of karachi, pakistan?. The aim of this study was to discover the association of serum high-sensitivity C-reactive protein (hsCRP) with various risk factors for metabolic syndrome in an urban population of Karachi, Pakistan. In this cross-sectional study, 337 healthy adu...

Nance W.E., 1978: Proceedings of the 2nd international congress on twin studies part b biology and epidemiology august 29 september 1 1977 washington dc usa. Nance, Walter E (Ed ) Progress in Clinical And Biological Research, Vol 24 Twin Research Part B Biology And Epidemiology Proceedings Of The 2nd International Congress on Twin Studies Washington, D C , Usa, Aug 29-Sept 1, 1977 Xiii+218p Illus Alan R Liss, Inc : New York, N Y , Usa Isbn 0-8451-0151-X 1-205

Omoti, A.E.; Waziri-Erameh, J.M.; Okeigbemen, V.W., 2009: A review of the changes in the ophthalmic and visual system in pregnancy. Pregnancy is often associated with ocular changes which may be more commonly transient but occasionally, permanent. It may be associated with the development of new ocular conditions, or can exacerbate pre-existing conditions. The ocular effects o...

Amblard, C.; Bourdier, G.; Sime Ngando, T.; Rachiq, S.; Carrias, J.F.ancois, 1994: Diel and vertical variations of the microbial stocks and their relative activities. The objective of this study was to ascertain the extent of diel and vertical variability in, firstly, the abundance and biomass of the different plankton communities (bacteria, heterotrophic flagellates, ciliates and phytoplankton), and, secondly,...

Arendt, R.M.; Seizinger, B.R.; Pasi, A.; Mehraein, P.; Herz, A., 1985: Characterization of proenkephalin B-derived opioid peptides in the human hypothalamo-neurohypophyseal axis. Proenkephalin B-derived opioid peptides, such as dynorphin1-17, dynorphin1-8, dynorphin B, alpha-neo-endorphin and beta-neo-endorphin in the human hypothalamo-neurohypophyseal tract were quantitated and characterized by the combined use of various...

Khristova, E., 1972: Chemical control of greenhouse white fly. After several years' trials the following are recommended for the control of Asterochiton trivaporariorum [Trialeurodes vaporariorum?]: Bromex 0.15%, Unden w.p. 50 [propoxur] 0.1%, Unden E 20 0.2% and Actellic [primiphos] 0.3%. Alternated use...

Shapiro M.S.; Decoursey T.E., 1988: Two types of potassium channels in a lymphoma cell line. Biophysical Journal 53(2 PART 2): 550A