Effects of Commercial Herbal Extracts Enriched Artemia nauplii on Enzymatic and Nonenzymatic Antioxidents Activities of Oreochromis mossambicus

2012 ◽  
Vol 3 (6) ◽  
pp. 468-470
Author(s):  
S.Muthukumar S.Muthukumar ◽  
◽  
V.Ramasubramanian V.Ramasubramanian ◽  
V.Uthayakumar V.Uthayakumar ◽  
S.Munirasu S.Munirasu
Author(s):  
Daryl A. Cornish ◽  
George L. Smit

Oreochromis mossambicus is currently receiving much attention as a candidater species for aquaculture programs within Southern Africa. This has stimulated interest in its breeding cycle as well as the morphological characteristics of the gonads. Limited information is available on SEM and TEM observations of the male gonads. It is known that the testis of O. mossambicus is a paired, intra-abdominal structure of the lobular type, although further details of its characteristics are not known. Current investigations have shown that spermatids reach full maturity some two months after the female becomes gravid. Throughout the year, the testes contain spermatids at various stages of development although spermiogenesis appears to be maximal during November when spawning occurs. This paper describes the morphological and ultrastructural characteristics of the testes and spermatids.Specimens of this fish were collected at Syferkuil Dam, 8 km north- west of the University of the North over a twelve month period, sacrificed and the testes excised.


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