Certain reproductive characteristics of the freshwater mussel Unio terminalis delicates (Lea, 1863) in Golbasi Lake, Turkey
Yükleniyor...
Dosyalar
Tarih
2006
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The aquaculture potential of Unio terminalis has been considered, but is hindered by a lack of knowledge about the reproductive characteristics that promote yields. The present study describes the seasonal reproductive cycle, gonad structure and sex ratio of the freshwater mussel U. terminalis. A total of 695 individuals were collected in monthly samples from October 2004 to September 2005 in Golbas iota Lake, Turkey. Calculation of the gonadosomatic index and histological examination of the gonads showed that gametogenesis began in winter, and spawning occurred in summer and early autumn. Five stages of oogenesis and five stages of spermatogenesis were identified. Spermatogenesis followed a pattern similar to that of typical oogenesis. The population consisted of dioecious individuals. Although sex ratios of U. terminalis were not significantly different from the expected 1:1 ratio (P > 0.05), slightly female-biased sex ratios were recorded. These results and existing data on mussel meat, phytoplankton production, availability of mussel spat, water quality and growth performance suggest that U. terminalis would be a great source for use in future aquaculture attempts.
Açıklama
Anahtar Kelimeler
gametogenesis, reproductive cycle, GSI, sex ratio, Unio terminalis delicatus
Kaynak
Aquaculture Research
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
37
Sayı
13
