Reproduction and gonad development of gastropod Thais carinifera in Lake Timsah, Suez Canal, Egypt | ||
| Egyptian Journal of Aquatic Biology and Fisheries | ||
| Article 4, Volume 13, Issue 2, April 2009, Pages 53-67 PDF (310.63 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejabf.2009.2032 | ||
| Authors | ||
| Nancy Radwan1; Samya Mohammad2; Saad Mohamed3; Ahmed Yaseen4 | ||
| 1Department of Zoology, Faculty of Education, El Arish, Suez Canal University, Egypt | ||
| 2Department of Zoology, Faculty of Science, Port Said, Suez Canal University, Egypt | ||
| 3Department of marine Biology, Faculty of Sciences, Ismailia, Suez Canal University, Egypt | ||
| 4Department of Zoology, Faculty of Science, Suez, Suez Canal University, Egypt | ||
| Abstract | ||
| Gonad development, reproductive cycle and sex ratio of Thais carinifera were studied through a histological investigation of its gonads. Samples of Thais carinifera were monthly collected during the period from February 2007 to May 2008, from Lake Timsah, Suez Canal, Egypt. Staging criteria for the gonad of male and female snails were described. The ovary and testis in both sexes were composed of a number of oogenic follicles and several spermatogenic follicles respectively. Reproductive cycle of Thais carinifera could be categorized into five stages: early active, late active, ripe, fully ripe and partially spawning phase (in males), and, early active, late active, ripe, spawned and spent phase (in females). Sex ratio departed from 1:1 and the males dominated the population. | ||
| Keywords | ||
| Gastropoda; Thais carinifera; reproductive cycle; imposex | ||
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