Study of the case hermaphrodite and Sex reversal in the yellow fin sea bream Acanthopagrus latus in AL -Razaza lake | ||
| journal of kerbala university | ||
| Article 1, Volume 10, Issue 2, July 2014, Pages 205-218 PDF (0 K) | ||
| Abstract | ||
| The phenomenon of protandrous hermaphrodite and sex reversal has been studies in Acanthopagrus latus that is currently available in Al Razaza lake which fished by gill nest or cast net . A sample of 161 was chosen for the period of begining of August 2008 up to the end of January 2009 . Through this study , the fish gender and its sexual maturation were limited , and a studying monthly varieties of gonads function values GSI and liver function HSI and studying fish length at the first sex adulthood . The study also included the external and structure descriptive of the fish gonads . It was notices , according to the study , that the sex proportion was 38.51 for males and 44.72 for females and 16.77 for the hermaphrodite . The statistic analysis results showed that there are no moral differences between the observed and expected sex proportion ( p >0.05 ) . For the male proportion to the female in the total gathering is 1:0.86 ; it was noticed that the proportion tends to for the female with the age progress .this refers to the sex diversion from the male to male protandrous . The monthly changes in gonad function values of males and females showed that the increase in GSI values of both sexes start from September with a continual increase till reach the highest value in January 1.47 for male and 2.30 for female . The monthly change of the liver function showed that the increase in HSI values start from September with a continual increase reaching the top in January to 2.11 for male and 2.26 for female. The external examination for the Acanthopagrus latus gonads identified three types of gonads male , female and hermaphroditic . | ||
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