Naslov
Reproduction cycle of the golden grey mullet, Liza aurata (Risso, 1810) in the estuary of the Neretva River, southeastern Adriatic Sea, Croatia

Autori
Bartulović, Vlasta ; Glamuzina, Branko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of the XII European Congress of Ichthyology / Buj, Ivana ; Zanella, Linda ; Mrakovčić, Milorad - Zagreb : Zavod za zoologiju, Prirodoslovno matematički fakultet, 2007, 245-245

Skup
European Congress of Ichthyology (12 ; 2007)

Mjesto i datum
Cavtat, Hrvatska, 09.09.2007. - 13.09.2007

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
golden grey mullet; Liza aurata; reproduction cycle; Neretva River estuary

Sažetak
The golden grey mullet, Liza aurata (Risso, 1810) is typical representative of the Atlantic-Mediterranean fauna, common in Meditteranean and in the Black Sea and introduced in the Azov and Caspian Seas. It inhabits the Adriatic coast living in inshore waters, lagoons and estuaries and rarely fresh waters. It represents a highly valued resource for local fisheries. The knowledge of reproductive period and spawning migrations are crucial in efficient artisanal and commercial fishery. Gond-somatic index (GSI) of the golden grey mullet from Neretva River estuary is lower than 1% in the November-June period. GSI started to increase in July, and reached the level of 3.6% for females and 0.98% for males. The highest GSI was found in September, when it was 5.5% for females, 1.8% for males and 3.6% for all sample. During October GSI was higher than 1% in both sexes. The GSI changes were verified histologically. During winter and spring, the ovaries are composed of nests of oogonia and oocytes in the early previtellogenic stage. During summer, oocytes in late previtellogenic stage dominated. In September, most of the ovaries are occupied with late vitellogenic oocytes, but the presence of oocytes in the primary growth phase is evident. Sex ratio of the golden grey mullet total sample was 53.5% female and 46.5% males. The profile shows skewed sex ratios throughout the year. Males dominated in January and October, while females significantly dominated in February, March, May and July.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA