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DISTRIBUTION OF BATHYNECTES PIPERITUS (BRACHYURA: PORTUNIDAE) IN THE BENGUELA UPWELLING REGION AND ITS RELATIONSHIP WITH SOME ENVIRONMENTAL PARAMETERS

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ABSTRACT Distribution and abundance patterns in relation to some environmental parameters and population size structure have been studied in the deep-water portunid crab Bathynectes piperitus in the Benguela upwelling region. The highest densities were found between 300 and 400 m depth, especially between latitudes 24°S and 28°S, associated with oxygen levels higher than 0.51 ml/l, and bottom temperatures of 7-8°C. Sediment granulometry did not appear to play a crucial role in determining the distribution pattern of the species; high abundances of B. piperitus occurred on sediments with 20-80% silt-clay content. Sex ratio was highly male-biased at both depth extremes of the distribution. The main recruitment area was found between 200 and 300 m in latitudes 23°S and 24°S. No single environmental parameter appears to be responsible for the species' main distribution patterns in this area.

10.1163/193724089X00331
/content/journals/10.1163/193724089x00331
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/content/journals/10.1163/193724089x00331
2017-08-21

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