Naslov
Diet overlap of introduced Atlantic and native Danubian lineages of brown trout (Salmo trutta) from inland waters

Autori
Velagić, Luana

Vrsta, podvrsta i kategorija rada
Ocjenski radovi, diplomski rad

Fakultet
Agronomski fakultet

Mjesto
ZAGREB

Datum
18.09

Godina
2019

Stranica
48

Mentor
Piria, Marina

Ključne riječi
invasive ; feeding habits ; diet overlap ; food sources ; overstocking

Sažetak
Brown trout has been widely introduced into suitable environments globally. In Croatia, the Danube (Da) lineage of brown trout is native. However, due to anglers’ activities, brown trout of the Atlantic (At) lineage were stocked into Croatian streams and rivers. Brown trout of the At lineage have been determined as invasive, posing a threat to native Da populations. Until now, no research related to feeding competition between At and Da lineage of brown trout from inland waters has been performed. Thus, the purpose of this research is to examine the natural diet of brown trout of At and Da lineages and to compare their feeding overlapping. Feeding habits of both trout lineages are related to insects of both terrestrial and aquatic origin. High diet overlap between At and Da lineages were found. This result indicate that At lineage pose significant threat to native Da trout populations. Also, it seems that At lineage feed more by insects of terrestrial origin. Such feeding strategy could make the species more attractive for fly fishing and consequently more attractive for stocking which may complicate the implementation of conservation measures necessary to preserve the indigenous brown trout of the DA lineage.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Biotehnologija

POVEZANOST RADA