Feeding habits of juveniles stages of Mediterranean horse mackerel, Trachurus mediterraneus (Steindachner, 1868.) in the central Adriatic Sea
| Autor: | Žužić, Katarina |
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| Přispěvatelé: | Šantić, Mate, Paladin, Antonela, Vuko, Elma |
| Jazyk: | chorvatština |
| Rok vydání: | 2020 |
| Předmět: | |
| Popis: | Za istraživanje prehrane juvenilnih stadija šnjura pučinara (Trachurus mediterraneus, Steindachner, 1868) analizirane su 544 jedinke. Uzorci su sakupljeni na području srednjeg Jadrana. Cilj rada je odrediti kvantitativno-kvalitativni sastav hrane, intenzitet hranjenja i promjene u sastavu hrane tijekom sezona. Ispitan je i sastav hrane ovisno o lokalitetu gdje su jedinke ulovljene. Glavni plijen juvenilnih stadija šnjura pučinara su zooplanktonski račići veslonošci (Copepoda). Račići svjetlari (Euphausiacea) i jaja riba su dodatni plijen, dok ostale skupine plijena (rašljoticalci, mizidi i amfipodni rakovi) predstavljaju slučajnu hranu. Tijekom godine nema značajnijih promjena u sastavu hrane. Račići veslonošci glavni su plijen u svim sezonama, s najvišim vrijednostima u jesen. Vrste iz roda Paracalanus, Clausocalanus i Calanus vrlo su česte u srednjem Jadranu, što vjerojatno objašnjava dominaciju račića veslonošaca u prehrani na svim lokalitetima. A total of 544 specimens of mediterranean horse mackerel (Trachurus mediterraneus, Steindachner, 1868) in juvenile stages were analysed. Samples were collected in the central Adriatic Sea. The aim of the study is to determine the quantitative and qualitative composition of the diet, the intensity of feeding and changes in the composition of the diet during the change of seasons. The composition of diet, depending on the localities where the specimens have been caught, was also examined. The main prey of juvenile stages of Mediterranean horse mackerel are zooplankton crustaceans Copepoda. Euphausiacea and eggs of fish are additional prey, while other groups prey (Cladocera, Mysidacea and Amhipoda) are random food. During the changes of seasons there are no significant changes in composition of the diet. Copepoda are dominant prey in all seasons, with the highest values in autumn. Species of genus Paracalanus, Clausocalanus i Calanus are commonly in the central Adriatic Sea, which probably explains dominates of copepods in diet in all sampling locations. |
| Databáze: | OpenAIRE |
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