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Seasonal Changes in the Ovary of the African Lungfish Protopierus annectens (Pices : Sarcopterygii) in the Flood Plains of River Niger in Etsako East Local Government Area of Nigeria
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  • Seasonal Changes in the Ovary of the African Lungfish Protopierus annectens (Pices : Sarcopterygii) in the Flood Plains of River Niger in Etsako East Local Government Area of Nigeria
  • Seasonal Changes in the Ovary of the African Lungfish Protopierus annectens (Pices : Sarcopterygii) in the Flood Plains of River Niger in Etsako East Local Government Area of Nigeria
저자명
Onyedineke. Nkechi E.,Otuogbai. Timothy,Elakhame. Luckey A.,Erekaife. Joyce O.
간행물명
韓國養殖學會誌
권/호정보
2002년|15권 1호|pp.43-48 (6 pages)
발행정보
한국수산과학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

We investigated the gonadosomatic index (GSI), germ cell development, reproductive cycle of the Afriean lungfish Protorierus annecteus (Owen) by histological observations and morphometric data. Samples were collected from the river Orie and its flood of Nigeria, from January to December 2000. The fish is dioecious and oviparous. Monthly changes in the gonadosomatic index (GSI) showed a similar pattern to change in the mean oocyte diameter and the reproductive cycle. The reproductive period occurred from March to July-August; the spawning period was once a year between truly and August, and the main spawning occurred in August when active and voracious feeding occurred during the rainy season. In the resting (dormant) stage after spawning, fish stopped feeding and aestivated during the dry season from December to February. The reproductive cycle of the species can be divided into five successive stages, quiescent stage (March to April), developing/maturing stage (April to lune), ripe/spawning stage (July to August), post-spawning stage (September to November), and resting (dormant) stage (December to February).