Growth and reproduction of the population of the four-spot megrim (Lepidorhombus boscii Risso) off the Portuguese coast
Santos, P.T. (1994). Growth and reproduction of the population of the four-spot megrim (Lepidorhombus boscii Risso) off the Portuguese coast. Neth. J. Sea Res. 32(3-4): 379-383
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579; e-ISSN 1873-1406, more
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| Abstract |
Information is presented on the four-spot megrim (Lepidorhombus boscii caught in the Portuguese fisheries, based on field data from 1989 to 1992. The length (L; cm) -fecundity (F; n) relationship could be described by F = 58.720 .L2.224. The Von Bertalanffy growth parameters were L=39.8 (cm), K=0.20 (y-1) t0=-1.44 (y) for males and L=39.8 (cm), K=0.16 (y-1), t0=-1.86 (y) for females. In the length-weight relationship W=a. Lb, a=0.0025 and b=3.36 for females and a=0.0045 and b=3.16 for males. The total annual mortality rate was found to be Z=0.45 (y-1), natural mortality M=0.38 (y-1) and fishing mortality F=0.07 (y-1). |
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