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Pregled bibliografske jedinice broj: 581717

Zbornik radova

Autori: Matić-Skoko, Sanja; Ferri, Josipa; Tutman, Pero; Skaramuca, Daria; Đikić, Domagoj; Lisičić, Duje; Franić, Zdenko; Skaramuca, Boško
Naslov: Towards a reliable assessment of the European conger eel, Conger conger (L.) in the Mediterranean Sea: Population parameters for life history
( Towards a reliable assessment of the European conger eel, Conger conger (L.) in the Mediterranean Sea: Population parameters for life history )
Izvornik: Sustainable Fisheries in a Changing World / Huntingford, Felicity (ur.). - Edinburgh : FSBI Conference Ltd , 2012. 222-222.
Skup: 6th World Fisheries Congress
Mjesto i datum: Edinburgh, Škotska, 7-11.05.2012.
Ključne riječi: age determination; growth; feeding; Conger conger; Mediterranean
( age determination; growth; feeding; Conger conger; Mediterranean )
Sažetak:
Basic biological data, as important input parameters for stock assessment techniques, for the population of the European conger eel, Conger conger (L.) are presented based on a one-year study conducted in the north-central Mediterranean (Adriatic coastal waters). The total length (TL) and weight (W) of the sampled congers eels (N = 317) ranged from 23.4 to 144.0 cm and 43.8 to 6180.0 g, respectively. Majority of all sampled conger eels were females. The greatest increase of gonadosomatic index occurred in winter but the absence of males and mature females in the coastal waters suggests sexual separation, different spawning migration patterns and spawning grounds somewhere in deeper waters. Ground otoliths displayed a clearly visible pattern of alternating opaque and translucent zones which were used to estimate C. conger ages. Both edge-type and marginal increment analysis confirmed the formation of a single growth annulus per year. The relationship between the total length and age was described by the von Bertalanffy growth model: TL = 187.231 – exp (-0.11(t + 0.23)). Observed maximum age of coastal conger eel population was 8 years although most of the sampled fish were 5 years old. C. conger is opportunistic predator and its diet was composed mainly of fishes, followed by crustaceans and cephalopods. Due expressed site fidelity, wide prey spectrum (33 taxa) reflected local marine community structure and biodiversity level. There was no difference (P > 0.05) among the food items of fish specimens in different size classes or those sampled in different seasons. Regarding the fact that several important biological indices are still unclear, intensified and integrated research throughout Mediterranean is necessary in order to determine a common strategy for reliable assessment of this species.
Vrsta sudjelovanja: Poster
Vrsta prezentacije u zborniku: Sažetak
Vrsta recenzije: Međunarodna recenzija
Projekt / tema: 001-0013077-0844
Izvorni jezik: eng
Kategorija: Znanstveni
Znanstvena područja:
Biologija
Upisao u CROSBI: jferri@unist.hr (jferri@unist.hr), 28. Svi. 2012. u 11:31 sati



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