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Population Dynamics and Spawning of the Flatfish Solea Bleekeri and Pseudorhombus Arsius in the Intertidal Area of Inhaca Island, Moçambique

Population Dynamics and Spawning of the Flatfish Solea Bleekeri and Pseudorhombus Arsius in the... The population dynamics of flatfish Solea bleekeri and Pseudorhombus arsius within the intertidal area of Inhaca Island, Moçambique, was investigated using bottom trawl data collected during summer (December 1996 – March 1997) and winter (June 1997 – August 1997). The endemic S. bleekeri is a small, relatively slowgrowing species with low rates of natural mortality. Densities of juveniles were significantly greater in winter (24.7 fish 1 000 m−2) than in summer (10.8 fish 1 000 m−2), probably because of intensive spawning during summer. Greater catches of S. bleekeri were taken by night than by day. Densities of P. arsius did not differ significantly between day and night or among seasons. Mean density of P. arsius was 53 fish 1 000 m−2 for the survey. Both species preferred the same substrata, significantly greater densities being found on the mudflats and in the tidal channels. Both seem to complete two life cycles within a year. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png African Journal of Marine Science Taylor & Francis

Population Dynamics and Spawning of the Flatfish Solea Bleekeri and Pseudorhombus Arsius in the Intertidal Area of Inhaca Island, Moçambique

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Population Dynamics and Spawning of the Flatfish Solea Bleekeri and Pseudorhombus Arsius in the Intertidal Area of Inhaca Island, Moçambique

Abstract

The population dynamics of flatfish Solea bleekeri and Pseudorhombus arsius within the intertidal area of Inhaca Island, Moçambique, was investigated using bottom trawl data collected during summer (December 1996 – March 1997) and winter (June 1997 – August 1997). The endemic S. bleekeri is a small, relatively slowgrowing species with low rates of natural mortality. Densities of juveniles were significantly greater in winter (24.7 fish 1 000 m−2) than in summer (10.8...
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Publisher
Taylor & Francis
Copyright
Copyright Taylor & Francis Group, LLC
ISSN
1814-2338
eISSN
1814-232X
DOI
10.2989/18142320309504000
Publisher site
See Article on Publisher Site

Abstract

The population dynamics of flatfish Solea bleekeri and Pseudorhombus arsius within the intertidal area of Inhaca Island, Moçambique, was investigated using bottom trawl data collected during summer (December 1996 – March 1997) and winter (June 1997 – August 1997). The endemic S. bleekeri is a small, relatively slowgrowing species with low rates of natural mortality. Densities of juveniles were significantly greater in winter (24.7 fish 1 000 m−2) than in summer (10.8 fish 1 000 m−2), probably because of intensive spawning during summer. Greater catches of S. bleekeri were taken by night than by day. Densities of P. arsius did not differ significantly between day and night or among seasons. Mean density of P. arsius was 53 fish 1 000 m−2 for the survey. Both species preferred the same substrata, significantly greater densities being found on the mudflats and in the tidal channels. Both seem to complete two life cycles within a year.

Journal

African Journal of Marine Science – Taylor & Francis

Published: Jun 1, 2003

Keywords: DENSITY; FLATFISH; GROWTH RATE; INHACA ISLAND; JUVENILES; MATURATION; MOCAMBIQUE; SPAWNING

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