Avian predation mediates size-specific survival in a Neotropical annual fish: a field experiment

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F18%3A00489136" target="_blank" >RIV/68081766:_____/18:00489136 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1093/biolinnean/bly022" target="_blank" >http://dx.doi.org/10.1093/biolinnean/bly022</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/biolinnean/bly022" target="_blank" >10.1093/biolinnean/bly022</a>

Result language

angličtina

Original language name

Avian predation mediates size-specific survival in a Neotropical annual fish: a field experiment

Original language description

Predation and population density have fundamental size- and sex-specific effects on individual survival and demographic parameters. Given the overlap and interactions between different age cohorts in natural populations, separating the factors related to differential survival and growth based on longitudinal field-collected data is problematic. Using a Neotropical annual fish (Austrolebias minuano) with a single age cohort per generation, we used replicated field enclosures to experimentally test the roles of avian predation and fish population density on survival and growth over adult lifespan. We found that mortality risk was higher in larger males and smaller females when predation was experimentally excluded. Exposure to avian predation eliminated this sex-specific effect of body size on survival. No overall sex difference in survival was found in the experiment, despite a female-biased sex ratio in natural populations. Individually based growth rates were highest in enclosures at low population density with no predation risk. Overall, we demonstrate that annual fish suffer high sex-dependent size-specific mortality that is more strongly related to predation than to density-dependent processes. This has important implications for our understanding of the evolution of senescence and other life history traits in annual fishes.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10602 - Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology

Project

<a href="/en/project/GBP505%2F12%2FG112" target="_blank" >GBP505/12/G112: ECIP - European Centre of Ichtyoparasitology</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Biological Journal of the Linnean Society

ISSN

0024-4066

e-ISSN

—

Volume of the periodical

124

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

56-66

UT code for WoS article

000434109900007

EID of the result in the Scopus database

—