Abstract

The morphometric characteristics of several commercially important penaeid shrimps from the Zhujiang estuary, China, were studied. Morphometric equations were constructed for males and females of Penaeus chinensis, Penaeus penicillatus, Metapenaeus affinis, Metapenaeus ensis, Metapenaeus joyneri and Parapenaeopsis hungerfordi. Males were generally smaller than females. Differences in length-weight relationship between males and females were found in Metapenaeus affinis and Metapenaeus joyneri. Length-weight relationship in females of Metapenaeus affinis, Metapenaeus ensis, Metapenaeus joyneri and Parapenaeopsis hungerfordi varied with the degree of sexual maturity. Females with mature ovaries were generally heavier than immature females of the same body length.

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