Naslov
Study of the reproduction of the Karamote shrimp Peneaus (Melicertus) kerathurus in Amvrakikos Gulf, western Greece
(Study of the reproduction of the Karamote shrimp Penaeus (Melicertus) kerathurus in Amvrakikos Gulf, western Greece)

Autori
Conides, Alexis ; Glamuzina, Branko ; Dulčić, Jakov ; Kapiris, Kostas ; Jug-Dujaković, Jurica ; Papaconstantinou, Costas

Izvornik
Acta Adriatica (0001-5113) 49 (2008), 2; 97-106

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

Ključne riječi
Penaeus kerathurus ; reproduction ; sex ratio ; gonadosomatic index ; fecundity ; Greece

Sažetak
The reproduction of the karamote shrimp, Melicertus kerathurus (Forskå ; ; l 1775), was studied for the native population in Amvrakikos Gulf (Ionian Sea ; western Greece). Sampling was carried out on a monthly basis between June 1999 and May 2001. The results showed that the shrimp M. kerathurus reproduction period spans between late April and late September. The stimulus for the initiation of the reproduction process was recognised as the rapid increase of water temperature during March. The size-at-maturity was estimated at the size of 45.23 mm carapace length (or 156.2 mm in total length). The smallest mature female in the samples was found 30 mm CL or 113.95 mm TL. Maximum gonad-somatic index was estimated to be 9.62% for female shrimps at stage IV maturity. The population gonad-somatic index peaks in May with an average value of 6.895%. Fecundity was estimated to be 154600 of oocytes per g of gonad tissue at the stage IV (mature female). Monthly sex ratios (males/females) were found higher than 1 throughout the year with maximum values reaching 2.5. A new life cycle pattern is proposed for the particular population.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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