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Ichthyoplankton distribution and dispersal in the Tsitsikamma National Park marine reserve, South Africa

journal contribution
posted on 2023-05-16, 20:21 authored by Tilney, RL, Nelson, G, Radloff, SE, Colin BuxtonColin Buxton
The nature of ichthyoplankton distribution within the Tsitsikamma National Park marine reserve was investigated in an attempt to evaluate the potential for export of larvae of commercially and recreationally important reef species to adjacent, exploited areas. Monthly, inshore ichthyoplankton samples were taken using Bongo nets over an 18-month period. Sampling sites were located over areas of high-profile reef and sand, Currentmeter measurements of the area were used to determine current velocity, direction and reversal periodicity. Statistical analysis of the data was performed independently for larvae from four families: Blenniidae, Gobiesocidae, Sparidae and Engraulidae. Results suggested that blenniid and gobiesocid larvae practised active position retention throughout their pelagic phase, while this feature was less defined in sparid and engraulid larval distribution. Using larval distribution and current-meter information, projected dispersal distances for spa rid larvae, the family containing the most target commercial and recreational angling species, were estimated. The results suggest that sparid larvae are exported from the reserve to adjacent, exploited areas.

History

Publication title

South African Journal of Marine Science

Volume

17

Pagination

1 - 14

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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