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Aspects of the biology of the abalone Haliotis midae (Linne 1758) on the east coast of South Africa. 2. Reproduction

journal contribution
posted on 2023-05-16, 20:17 authored by Wood, AD, Colin BuxtonColin Buxton
The South African abalone Haliolis midae is a dioecious, broadcast spawner with a high fecundity. Histological examination and gonad bulk indices showed that individuals are iteroparous, asynchronous spawners, and that the breeding season extends from March through to October, spawning peaking between April and June. The structure of the ovary and testis, and the process of gametogenesis are typical of haliotid species. Males and females spawn partially or totally, with atresia of residual gametes occurring after spawning. No resting stage was apparent and gonadal recrudescence began immediately after spawning. Sexual maturity was first attained at 20-25 mm shell width, and the size at 50% sexual maturity was attained at approximately 35 mm shell width in all of the populations studied, a size considerably lower than that of previously studied West Coast populations of H. midae.

History

Publication title

South African Journal of Marine Science

Volume

17

Pagination

69 - 78

ISSN

0257-7615

Department/School

Institute for Marine and Antarctic Studies

Publisher

Sea Fisheries Research Institute

Place of publication

Cape Town, South Africa

Rights statement

Copyright © 1996 National Inquiry Services Centre (NISC)

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the environmental sciences

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