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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Do environmental factors influence the movement of estuarine fish? A case study using acoustic telemetry
Estuarine, Coastal and Shelf Science, Volume 78, No. 1, Year 2008
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Description
Telemetry methods were used to investigate the influence of selected environmental variables on the position and movement of an estuarine-dependent haemulid, the spotted grunter Pomadasys commersonnii (Lacepède 1801), in the Great Fish Estuary, South Africa. Forty individuals (263-698 mm TL) were surgically implanted with acoustic coded transmitters and manually tracked during two periods (7 February to 24 March 2003; n = 20 and 29 September to 15 November 2003; n = 20). Real-time data revealed that spotted grunter are euryhaline (0-37) and are able to tolerate large variations in turbidity (4-356 FTU) and temperature (16-30 °C). However, the fish altered their position in response to large fluctuations in salinity, temperature and turbidity, which are characteristic of tidal estuarine environments. Furthermore, tidal phase had a strong influence on the position of spotted grunter in the estuary. © 2007 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Childs, Amber Robyn
South Africa, Grahamstown
Rhodes University
Cowley, Paul Denfer
South Africa, Grahamstown
South African Institute for Aquatic Biodiversity
NÆsje, Tor Fredrik
Norway, Trondheim
Trondheim Hovedkontor
Booth, Anthony John
South Africa, Grahamstown
Rhodes University
Potts, Warren Mason
South Africa, Grahamstown
South African Institute for Aquatic Biodiversity
Thorstad, Eva Bonsak
Norway, Trondheim
Trondheim Hovedkontor
Økland, Finn
Norway, Trondheim
Trondheim Hovedkontor
Statistics
Citations: 108
Authors: 7
Affiliations: 3
Identifiers
Doi:
10.1016/j.ecss.2007.12.003
ISSN:
02727714
Study Design
Case Study
Study Approach
Qualitative
Study Locations
South Africa