Yazar "Şereflişan, Menderes" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    The gastropod fauna and their abundance, and some physicochemical parameters of Lake Gölbaşı (Hatay, Türkey)
    (2009) Şereflişan, Hülya; Yıldırım, Mehmet Zeki; Şereflişan, Menderes
    An investigation was carried out on the native gastropod species in Lake Gölbaşı, Hatay. During the research 3 species belonging to the subclass Pulmonata (Gyraulus piscinarum, Radix labiata, Anisus leucostoma) were detected along with 9 species of the subclass Orthogastropoda (=Prosobranchia) including Theodoxus jordani, Semisalsa contempta, Semisalsa longiscata, Bithynia phialensis, Valvata saulcyi, Valvata piscinalis, Melanoides tuberculatus, Melanopsis praemorsa ferussaci, Melanopsis costata costata. These gastropod species were collected from 4 stations chosen in the lake. Furthermore, turbidity, dissolved oxygen, pH, and temperature were measured at the sampling sites.
  • [ N/A ]
    Öğe
    The reproductive cycle of Potomida littoralis (Cuvier, 1798) (Bivalvia: Unionidae) in Lake Gölbaşi, Turkey
    (2013) Şereflişan, Hülya; Çek, Şehriban; Şereflişan, Menderes
    In this work, reproductive cycle of Potomida littoralis, including histological description and indices of gonad maruration were investigated. There is no data previously available on the species. A total of 300 individuals were monthly collected from September 2009 to August 2010 in Gölbaşi Lake, Turkey. P. littoralis is dioecious and although males tended to predominate, the sex ratio was not significantly different from the expected 1:1 ratio (p>0.05). Calculation of the condition index (CI), gonadosomatic index (GSI) and histological examination of the gonads showed that gametogenesis began in January. Spawning occurred in June. Annual maximum GSI value peaked in May. A decrease of CI was observed during gametogenesis. When mussels had the highest GSI value, CI was the lowest value. This results suggest that gametogenesis and reproductive cycle are the key factor in mussels physiology and important for captive breeding/artificial mussels production and conservation status (e.g. When to obtain gravid females, when to relocate, when to restock, when to introduce fish host, when not to allow harvesting). Copyright 2013 Zoological Society of Pakistan.