Efficiency of a Small Pot for Oriental River Prawn <i>Macrobrachium nipponense</i> in Terms of Entry and Escape

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  • Efficiency of a Small Pot for Oriental River Prawn Macrobrachium nipponense in Terms of Entry and Escape
  • Efficiency of a Small Pot for Oriental

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Abstract

The construction of the pot entrance may be reflected in the degree of the change in the individuals in a pot. The efficiency of a small pot for Macrobrachium nipponense was studied. To clarify how the pot entrance design affects the efficiency of a pot, a series of tests were carried out under actual fishing conditions. The prawn's entry and its escape behavior was observed frequently and the length of the individual's stay in a pot was relatively short. The variations in the efficiency could be explained by the differences in the funnel design of h (height of neck)/d (diameter of opening). The apparent efficiency was maximum at h/d=3.1. The results suggest that the interaction between individuals in a pot is controlled by the funnel design.

Journal

  • Fisheries science

    Fisheries science 61 (6), 904-908, 1995

    The Japanese Society of Fisheries Science

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