REPRODUCTION CYCLES OF VEINED RAPA WHELK (Rapana Venosa, VALENCIENNES 1846) IN THE MIDDLE BLACK SEA (YAKAKENT, SAMSUN)
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Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Parlar Scientific Publications (P S P)
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The veined Rapa whelk, Rapana venosa (Valenciennes, 1846), have a significant commercial value in Turkey. This study was carried out between December 2013 and November 2014 in the Black Sea. R. venosa was collected to determine the reproductive cycle, the gonadosomatic index, gonad index. Monthly variation in gonad development stages revealed that R. venosa has an annual reproductive cycle and long gonadal activity period. Spawning occurred mainly between May and July and peaked in July and in September. The gonad development stages of males and females differed significantly (P<0.05) between months. In November, 1 out of 30 samples were found as a hermaphrodite, containing both sperm and eggs in the same area. Male individuals were dominant during the study period (1.0:2.4 female: male).
Açıklama
Anahtar Kelimeler
Veined rapa whelk, Rapana venosa, reproduction, sex ratio, hermaphrodite, Black Sea
Kaynak
Fresenius Environmental Bulletin
WoS Q Değeri
N/A
Scopus Q Değeri
Cilt
31
Sayı
7
