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MERIT RESEARCH JOURNAL OF  AGRICULTURAL SCIENCE AND SOIL SCIENCE (MRJASSS) (ISSN: 2350-2274)

 
 

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June 2017 Vol. 5 No.6

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El-Nasr TM
El-Drawany MA

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Merit Research Journal of Agricultural Science and Soil Science (ISSN: 2350-2274) Vol. 5(6) pp. 108-114, June, 2017

Copyright © 2017 Merit Research Journals

Original Research Article

Some Biological Studies on Terapon puta (Cuvier, 1829) in the Lake Timsah, Egypt 1-Age, Growth and Mortality of Terapon puta (Spinycheek Grunter)

 
 
 

T.M. Abu El-Nasr1* and M.A. El-Drawany2

 

Department of Zoology, Faculty of Science, Zagazig University, Egypt

*Corresponding Author’s Email: t_abuelnasr@yahoo.com

Accepted June 18, 201
7

 

Abstract

 

In the present study age, growth and mortality of Terapon puta was estimated for 380 specimens collected by monthly sampling. This study was carried out from June 2012 to May 2013 in the Lake Timsah, Egypt. The age of Terapon puta was estimated by scales’ readings and it was found out that the maximum age was IV years. The main total length and total weight values were calculated as 12.8 ±1.34 cm to 38.14 ±5.16 g and the calculated length-weight relationships were W = 0.016004 L3.0240 (Both sexes). The von Bertalanffy growth parameters were L∞ = 20.13 cm K = 0.13363 year-1 and to = -1.10850 year. The instantaneous rate of total mortality (Z) was 1.63251; the natural mortality (M) was 0.4304.and the fishing mortality (F) was estimated to be 1.202113. The exploitation rate (E) was calculated as 0.73 using value of M and F. Therefore, the population of Terapon puta off Lake Timsah was under the threat of overfishing.

Keywords: Age estimation, Terapon puta, Timsah Lake.






 




 

 
 


























 
 

 
 
   
   
   
   
   
   
   
   
   
   
   
 
 
 
 
 
 
 
 
   
 
                         

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