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Size Distribution and Biometric Studies on the Rocky Snail Thais carinifera in Lake Timsah, Suez Canal

By Ahmed on August 10,2010

 

Size Distribution and Biometric Studies on the Rocky Snail  Thais carinifera in Lake Timsah, Suez Canal

 Nancy A. Radwan¹*, Samia H. Mohammad2, Saad Z. Mohammad3, Ahmed E. Yaseen4 

¹Faculty of Education, Suez Canal University, El-Arish, Egypt ²Faculty of Science, Suez Canal University, Port Said, Egypt 3Faculty of Science, Suez Canal University, Ismailia, Egypt 4Faculty of Science, Suez Canal University, Suez, Egypt   

 ABSTRACT

This study investigates the population structure, size frequency distribution and the biometric studies of the rocky snail Thais carinifera in Lake Timsah, Suez Canal. The population was dominated by animals with shell length ranged from 5-5.5 to 5.6-6 cm, which represented 61.96 % of the total individuals. Significant correlations were found between shell length and most of the other parameters (shell width, aperture length, and body whorl), with negative allometric growth. The correlation co-efficient values between shell length and body weight were significant with isometric, positive and negative allometric growth along the study period (July 2006 - September 2007).

Key words: Thais carinifera, Lake Timsah, gastropods, imposex, Rockysnail.

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