The homogeneity of krill length composition in commercial trawl catches (hauls) was investigated by comparing length compositions from different parts of the same haul. There was no significant difference (P>0.05) in 53 out of 60 hauls. Therefore it is concluded that sampling from one part of the haul provides a reasonable estimate of length composition in the entire haul as a whole. In contrast to small variations in length composition within the same haul, variation between different hauls was most noticeable in areas where krill length compositions were bimodal.
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