Reproduction and gonad development of gastropod Thais carinifera in Lake Timsah, Suez Canal, Egypt

Document Type : Original Article

Authors

1 Department of Zoology, Faculty of Education, El Arish, Suez Canal University, Egypt

2 Department of Zoology, Faculty of Science, Port Said, Suez Canal University, Egypt

3 Department of marine Biology, Faculty of Sciences, Ismailia, Suez Canal University, Egypt

4 Department 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

Main Subjects

Egyptian Journal of Aquatic Biology and Fisheries
Volume 13, Issue 2
March and April 2009
Pages 53-67

Files

Share

How to cite

Statistics