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Testicular Development of the Male Lungfish, Protopterus annectens (OWEN) (Pisces: Sarcopterygii) in the Flood Plains of River Niger in Udaba-Ekperi in Nigeria
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  • Testicular Development of the Male Lungfish, Protopterus annectens (OWEN) (Pisces: Sarcopterygii) in the Flood Plains of River Niger in Udaba-Ekperi in Nigeria
  • Testicular Development of the Male Lungfish, Protopterus annectens (OWEN) (Pisces: Sarcopterygii) in the Flood Plains of River Niger in Udaba-Ekperi in Nigeria
저자명
Onyedineke. N.E.,Otuogbai. T.O.S.,Elakhame. L.A.,Ofoni. C.
간행물명
韓國養殖學會誌
권/호정보
2001년|14권 2호|pp.73-79 (7 pages)
발행정보
한국수산과학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Testicular development of the male African lungfish, Protopterus annectens (Owen) was investigated histologically. The testis was found to be an elongated structure that possessed two distinct portions: an anterior spermatogenic part that was made up of a system of testicular tubules and a posterior vesicular part that invaded the kidney tissue. Spermatogenesis can be divided into five stages; primary spermatogonia, secondary spermatogonia, spermatocyte, spermatids and spermatozoa. Based on the gonadosomatic index (GSI) and histological changes observed, the reproductive cycle can be divided onto four distinct stages: resting and quiescent (December to February), growing (March to June) ripe and spent (July to August) and postspawning (September to November). The GSI was the maximum on July when reproductive cells were mature, ripe and ready for spawning; and the minimum in August after fish spawned.