Naslov
A comparative study of the physiological condition of native and invasive crayfish in Croatian rivers

Autori
Lucić, Andreja ; Hudina, Sandra ; Faller, Matej ; Darko, Cerjanec

Izvornik
BIOLOGIA (0006-3088) 67 (2012), 1; 172-179

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
organosomatic indices; crayfish condition; freshwater invasion; indigenous crayfish; non-indigenous crayfish

Sažetak
The physiological condition of two invasive crayfish species identified in Croatian rivers (Orconectes limosus and Pacifastacus leniusculus) was compared with that of native crayfish populations (Astacus astacus and A. leptodactylus). Hepatosomatic, gonadosomatic and abdominal muscle indices were examined for all four species and within a specific invader-native pair. The results demonstrate that invasive crayfish had better overall physiological condition when compared to native species, with a higher energy content of the hepatopancreas, abdominal muscle and gonads in invasive than in native species, with the exception of A. leptodactylus females which demonstrated an increased ability to allocate energy to reproduction in comparison with other species. These results also indicate that A. astacus is physiologically more unstable than A. leptodactylus and thus more likely to be outcompeted and replaced by non-indigenous crayfish species.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA