On fishing selectivity of hadrah (fixed stake trap) in the coastal waters of Kuwait
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Published source details
Al-Baz A.F., Chen W., Bishop J.M., Al-Husaini M. & Al-Ayoub S.A. (2007) On fishing selectivity of hadrah (fixed stake trap) in the coastal waters of Kuwait. Fisheries Research, 84, 202-209.
Published source details Al-Baz A.F., Chen W., Bishop J.M., Al-Husaini M. & Al-Ayoub S.A. (2007) On fishing selectivity of hadrah (fixed stake trap) in the coastal waters of Kuwait. Fisheries Research, 84, 202-209.
Actions
This study is summarised as evidence for the following.
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Use a larger mesh size Action Link |
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Use a larger mesh size
A replicated, paired, controlled study in 2001–2002 at three intertidal sites in the Persian Gulf, Kuwait (Al-Baz et al. 2007) found that increasing the mesh size in fish traps (hadrah) did not typically improve the size-selectivity for a variety of fish species compared to a smaller conventional mesh size. The length at which fish had a 50% chance of escape was greater in traps with larger mesh sizes (51 mm or 25 mm) compared to conventional traps (19 mm) in only six of 40 comparisons, similar between mesh sizes in 31 comparisons, and smaller in the larger mesh sizes in three comparisons (see original paper for individual data for 25 fish species/groups). Sampling was carried out from October 2001 to December 2002 at three sites (Failakah, AlBaq’sh and Abu Hasaniyah). At each location, two traps were deployed: one of two experimental traps consisting of either 25 mm (AlBaq’sh and Abu Hasaniyah) or 51 mm (Failakah) mesh size, and a conventional trap of 19 mm mesh size. The two traps were positioned near to one another and fish were removed after 24 h and length recorded. A total of 153 samples were collected at Failakah, 38 from AlBaq’sh and 30 from Abu Hasaniyah.
(Summarised by: Chris Barrett)
