Journal
FISHERIES RESEARCH
Volume 81, Issue 1, Pages 26-36Publisher
ELSEVIER
DOI: 10.1016/j.fishres.2006.06.003
Keywords
appendix masculina; morphometric maturity; Nephrops norvegicus; primary sexual characteristics; size at onset of maturity (SOM)
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Size at onset of maturity (SOM) was estimated for both male and female Nephrops from primary sexual characteristics and morphometric traits. SOM estimated from primary sexual characteristics based on histological examination of the gonad ranged from 15.1 mm carapace length (CL) in males to 22.9 mm CL in females. Nephrops morphometric maturity, or change in allometric growth of body parts, was estimated from appendix masculina and cutter claw lengths in males and abdomen width in females from two sites in the Irish Sea. Two regression techniques were used to estimate morphometric maturity. Estimated SOM from morphometric characteristics ranged from 23.2 to 27.6 mm CL in females and from 25.9 to 31.0 mm CL in males. Spatial variation in SOM was observed in Nephrops from different parts of the Irish Sea. (c) 2006 Elsevier B.V. All rights reserved.
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