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Paper Information

Journal:   JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)   WINTER 2007 , Volume 16 , Number 62/1 (BIOLOGY ISSUE); Page(s) 45 To 59.
 
Paper: 

HISTOLOGICAL STUDY ON OVARY OF LONGTAIL TUNA (THUNNUS TONGGOL) AND KAWAKAWA (EUTHUNNUS AFFINIS) IN THE PERSIAN GULF

 
 
Author(s):  ABDALY S.*
 
* MARINE AND TECHNOLOGY FACULTY, NORTH TEHRAN BRANCH AZAD ISLAMIC UNIVERSITY, TEHRAN, IRAN
 
Abstract: 

In the present research which was done during the period of July 1997 to June 1998, histological studies on maturation stages of 40 Longtail tuna and Kawakawa specimen (Thunnus tonggol & Euthunnus affinis) were conducted. It was concluded that the ovaries of these fish had the following characteristics; Germination disk were not present. there were no difference among anterior, posterior and middle parts of maturity stage of ovaries. All observed ovaries were asynchronous. The ovaries had five maturity stages which were as follow:

a) Immature          b) Maturing          c) Rippening       d) Ripe   e) Spent Average dimension of oocyte in different stage are as follow:
Immature (2.4
m) Maturing (>50m) Rippening (100m) and Ripe (200m) for Longtail Tuna

Immature (> 12m) Maturing (<40m) Rippening (<70m) and Ripe (> 70m) for Kawakawa.

 
Keyword(s): HISTOLOGY, OVARY, THUNNUS TONGGOL, EUTHUNNUS AFFINIS, OMAN SEA, IRAN
 
References: 
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