Velikostní výběrovost v letní a zimní potravě kormorána velkého (Phalacrocorax carbo): odráží sezónně závislý rozdíl v lovecké výkonnosti?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F08%3A00318312" target="_blank" >RIV/60077344:_____/08:00318312 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Size selectivity in summer and winter diets of Great Cormorant (Phalacrocorax carbo): Does it reflect a season-dependent difference in foraging efficiency?

Popis výsledku v původním jazyce

The diet of the Great Cormorant was studied by means of examining regurgitated pellets, individual fish bones and fish remains collected from below the roosting trees at Želivka and Slapy Reservoir, Czech Republic, during summer, a warm winter and a coldwinter. Using diagnostic bones and own linear regression equations, between measured dimensions of the diagnostic bone and fish total length (LT), a total of 2055 fish of 18 species and 4 families were identified in the diet of Great Cormorants and their size was reconstructed. Both fish LT and fish weight differed significantly between seasons being, on average, 12.0 cm and 30 g during summer, 18.3 cm and 109 g during a warm winter and 22.8 cm and 157 g during the cold winter. The average weight of fish taken by Great Cormorants significantly increased with decreasing air and water temperature. Great Cormorants seem to consume all fish of appropriate size that they are able to catch in summer and select for larger fish in winter.

Název v anglickém jazyce

Size selectivity in summer and winter diets of Great Cormorant (Phalacrocorax carbo): Does it reflect a season-dependent difference in foraging efficiency?

Popis výsledku anglicky

The diet of the Great Cormorant was studied by means of examining regurgitated pellets, individual fish bones and fish remains collected from below the roosting trees at Želivka and Slapy Reservoir, Czech Republic, during summer, a warm winter and a coldwinter. Using diagnostic bones and own linear regression equations, between measured dimensions of the diagnostic bone and fish total length (LT), a total of 2055 fish of 18 species and 4 families were identified in the diet of Great Cormorants and their size was reconstructed. Both fish LT and fish weight differed significantly between seasons being, on average, 12.0 cm and 30 g during summer, 18.3 cm and 109 g during a warm winter and 22.8 cm and 157 g during the cold winter. The average weight of fish taken by Great Cormorants significantly increased with decreasing air and water temperature. Great Cormorants seem to consume all fish of appropriate size that they are able to catch in summer and select for larger fish in winter.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EG - Zoologie

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název periodika

Waterbirds

ISSN

1524-4695

e-ISSN

—

Svazek periodika

31

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000261043500016

EID výsledku v databázi Scopus

—