Reproduction and gonad development of gastropod Thais carinifera in Lake Timsah, Suez Canal, Egypt
Radwan, N., Mohammad, S., Mohamed, S., Yaseen, A. (2009). Reproduction and gonad development of gastropod Thais carinifera in Lake Timsah, Suez Canal, Egypt. EKB Journal Management System, 13(2), 53-67. doi: 10.21608/ejabf.2009.2032
Nancy Radwan; Samya Mohammad; Saad Mohamed; Ahmed Yaseen. "Reproduction and gonad development of gastropod Thais carinifera in Lake Timsah, Suez Canal, Egypt". EKB Journal Management System, 13, 2, 2009, 53-67. doi: 10.21608/ejabf.2009.2032
Radwan, N., Mohammad, S., Mohamed, S., Yaseen, A. (2009). 'Reproduction and gonad development of gastropod Thais carinifera in Lake Timsah, Suez Canal, Egypt', EKB Journal Management System, 13(2), pp. 53-67. doi: 10.21608/ejabf.2009.2032
Radwan, N., Mohammad, S., Mohamed, S., Yaseen, A. Reproduction and gonad development of gastropod Thais carinifera in Lake Timsah, Suez Canal, Egypt. EKB Journal Management System, 2009; 13(2): 53-67. doi: 10.21608/ejabf.2009.2032

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, Page 53-67  XML PDF (310.63 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2009.2032
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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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