Results 21 to 30 of about 323,005 (266)

Isotopic niche partitioning and individual specialization in an Arctic raptor guild [PDF]

Oecologia, 2021
Abstract Intra- and inter-specific resource partitioning within predator communities is a fundamental component of trophic ecology, and one proposed mechanism for how populations partition resources is through individual niche variation. The Niche Variation Hypothesis (NVH) predicts that interindividual trait variation leads to functional trade-
Devin L. Johnson, Michael T. Henderson, David L. Anderson, Travis L. Booms, Cory T. Williams   +4 more
openaire   +2 more sources

Resource utilization, competition and cannibalism of the red swamp crayfish Procambarus clarkii in integrated rice-crayfish culture without artificial diets

Aquaculture Reports, 2021
In a 95-day, integrated rice-crayfish (Procambarus clarkii) culture experiment, the changes in the contribution of feed sources, intra-sexual isotopic niche width, inter-sexual isotopic niche overlap, and potential competition were analyzed.
Mingdi He, Feng Liu, Fang Wang
doaj   +1 more source

Multidimensional natal isotopic niches reflect migratory patterns in birds [PDF]

Scientific Reports, 2021
Abstract Naturally occurring stable isotope ratios in animal tissues allow estimation of species trophic position and ecological niche. Measuring multiple isotopes of migratory species along flyway bottlenecks offers the opportunity to sample multiple populations and species whose tissues carry information at ...
Franzoi, A., Larsen, S., Franceschi, P., Hobson, K. A., Pedrini, P., Camin, F., Bontempo, L.   +6 more
openaire   +5 more sources

Too Close for Comfort? Isotopic Niche Segregation in New Zealand's Odontocetes. [PDF]

Biology (Basel), 2022
Species occurring in sympatry and relying on similar and limited resources may partition resource use to avoid overlap and interspecific competition. Aotearoa, New Zealand hosts an extraordinarily rich marine megafauna, including 50% of the world’s cetacean species.
Peters KJ, Bury SJ, Hinton B, Betty EL, Casano-Bally D, Parra GJ, Stockin KA.   +6 more
europepmc   +4 more sources

Isotopic niche provides an insight into the ecology of a symbiont during its geographic expansion. [PDF]

Curr Zool, 2022
The study of the recent colonization of a symbiont and its interaction with host communities in new locations is an opportunity to understand how they interact. The use of isotopic ratios in trophic ecology can provide measurements of a species' isotopic
González-Ortegón E, Perez-Miguel M, Navas JI, Drake P, Cuesta JA.   +4 more
europepmc   +2 more sources

An empirical evaluation of the utility of convex hull and standard ellipse areas for assessing population niche widths from stable isotope data. [PDF]

PLoS ONE, 2013
Stable isotope analyses are increasingly employed to characterise population niche widths. The convex hull area (TA) in a δ(13)C-δ(15)N biplot has been used as a measure of isotopic niche width, but concerns exist over its dependence on sample size and ...
Jari Syväranta, Anssi Lensu, Timo J Marjomäki, Sari Oksanen, Roger I Jones   +4 more
doaj   +1 more source

Isotopic niche plasticity of American alligators within the southern Everglades. [PDF]

PLoS One
Hydrologic alterations within the Everglades have degraded American alligator (Alligator mississippiensis) habitat, reduced prey base, and increased physiological stress. Alligator body condition declined across many management areas from 2000 through 2014, prompting us to investigate the relationship between their intraspecific isotopic niche dynamics
Denton MJ, Cherkiss MS, Mazzotti FJ, Brandt LA, Godfrey ST, Johnson D, Hart KM.   +6 more
europepmc   +5 more sources

Variation in isotopic niche, digestive tract morphology, and mercury concentrations in two sympatric waterfowl species wintering in Atlantic Canada

FACETS, 2020
Sympatric communities of organisms may exploit different ecological niches to avoid intra- and interspecific competition. We examined the isotopic niches of American black ducks (Anas rubripes) and mallards (A.
Matthew D. English, Gregory J. Robertson, Nelson J. O’Driscoll, Sara J. Klapstein, Liam E. Peck, Mark L. Mallory   +5 more
doaj   +1 more source

Isotopic niches support the resource breadth hypothesis [PDF]

Journal of Animal Ecology, 2017
SummaryBecause a broad spectrum of resource use allows species to persist in a wide range of habitat types, and thus permits them to occupy large geographical areas, and because broadly distributed species have access to more diverse resource bases, the resource breadth hypothesis posits that the diversity of resources used by organisms should be ...
Rader, Jonathan A., Newsome, Seth D., Sabat Kirkwood, Alejandro Pablo, Chesser, R. Terry, Dillon, Michael E., Martínez del Río, Carlos   +5 more
openaire   +3 more sources

Coral reef degradation alters the isotopic niche of reef fishes [PDF]

, 2017
The degradation of coral reefs is widely reported, yet there is a poor understanding of the adaptability of reef fishes to cope with benthic change. We tested the effects of coral reef degradation on the feeding plasticity of four reef fish species.
Letourneur, Yves, Briand, Marine, Graham, Nicholas Anthony James   +2 more
core   +5 more sources