Sexual segregation in European cyprinids: consequence of response to predation risk influenced by sexual size dimorphism
Identifikátory výsledku
Kód výsledku v 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>
Nalezeny alternativní kódy
RIV/00216208:11310/20:10418347
Výsledek na webu
<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>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Sexual segregation in European cyprinids: consequence of response to predation risk influenced by sexual size dimorphism
Popis výsledku v původním jazyce
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.
Název v anglickém jazyce
Sexual segregation in European cyprinids: consequence of response to predation risk influenced by sexual size dimorphism
Popis výsledku anglicky
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.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10617 - Marine biology, freshwater biology, limnology
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2020
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Hydrobiologia
ISSN
0018-8158
e-ISSN
—
Svazek periodika
847
Číslo periodika v rámci svazku
6
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
13
Strana od-do
1439-1451
Kód UT WoS článku
000513034800001
EID výsledku v databázi Scopus
2-s2.0-85079501515