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Aspects of the biology of the abalone Haliotis midae (Linne 1758) on the east coast of South Africa. 1. Feeding Biology


Wood, AD and Buxton, CD, Aspects of the biology of the abalone Haliotis midae (Linne 1758) on the east coast of South Africa. 1. Feeding Biology, South African Journal of Marine Science, 17 pp. 61 - 68. ISSN 0257-7615 (1996) [Refereed Article]

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Copyright 1996 National Inquiry Services Centre (NISC)

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The diet and the feeding habits of adult (80-150 mm shell length) and juvenile (<30 mm shell length) abalone Haliotis midae were investigated from the subtidal and intertidal regions at Great Fish Point on the Eastern Cape coast of South Africa. Adults feed on a variety of seaweeds by grazing on attached plants and by trapping drift algae under the muscular fool. Juvenile abalone are grazers, feeding primarily on encrusting algae. Within each of the adult and juvenile sub-groupings, no seasonal differences or size-specific dietary patterns were apparent. Based on algal availability and frequency of occurrence in gut samples, adults selected Ralfsia verrucosa, Viva spp. and five of the red seaweeds, namely Plocamium corallorhiza, Calliblepharisjimbriata, Spyridia cupressina, Hypnea rosea and Hypnea spicifero. Algae rejected by adults included several coralline species and the spined kelp Ecklonia radiata. Of the six algal types consumed by juveniles, only two were selected, i.e. Ralfsia verrucosa and Corallina sp. Adults exhibited a higher degree of selectivity and their diet generally reflected the most abundant available seaweed. Although the three most available algal types were consumed by juveniles, their level of selectivity was lower than for adults, and many of the available seaweeds were rejected.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Fisheries sciences not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:Buxton, CD (Professor Colin Buxton)
ID Code:48417
Year Published:1996
Web of Science® Times Cited:20
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2007-08-01
Last Modified:2010-01-19
Downloads:4 View Download Statistics

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