Sexual segregation in European cyprinids: consequence of response to predation risk influenced by sexual size dimorphism
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F20%3A00538493" target="_blank" >RIV/60077344:_____/20:00538493 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/20:10418347
Result on the web
<a href="https://doi.org/10.1007/s10750-020-04198-x" target="_blank" >https://doi.org/10.1007/s10750-020-04198-x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10750-020-04198-x" target="_blank" >10.1007/s10750-020-04198-x</a>
Alternative languages
Result language
angličtina
Original language name
Sexual segregation in European cyprinids: consequence of response to predation risk influenced by sexual size dimorphism
Original language description
Fish respond to predation threat by size/cohort-dependent presence in particular habitats and this may contribute to sexual segregation between habitats in species with sexual size dimorphism (SSD). The present study examines the validity of the 'predation risk hypothesis' and importance of SSD on habitat (pelagic/inshore) segregation and dietary differences between sexes in three cyprinids with various magnitudes of SSD-roach (Rutilus rutilus), freshwater bream (Abramis brama) and bleak (Alburnus alburnus). Fish were sampled using gillnets over five consecutive years in the imov Reservoir. Habitat segregation with female overrepresentation in the pelagic habitat was found in the most sexually dimorphic species with 26% bigger females-the roach. When analysis of habitat segregation was size-controlled, this segregation ceased to confirm the importance of SSD. Freshwater bream sexes (2% SSD) differed in diet but did not differ in habitat occupation. Bleak sexes were not segregated. Larger roach individuals (predominantly females) are less threatened by gape-limited predators and consequently they can occupy the risky but optimal (for zooplankton acquisition) pelagic habitat. Our results demonstrate that habitat segregation is present in the species with the most pronounced SSD.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10617 - Marine biology, freshwater biology, limnology
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Hydrobiologia
ISSN
0018-8158
e-ISSN
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Volume of the periodical
847
Issue of the periodical within the volume
6
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
13
Pages from-to
1439-1451
UT code for WoS article
000513034800001
EID of the result in the Scopus database
2-s2.0-85079501515