the objective of this study was to investigate the relationship among body weight and fat-tail measurements with fat-tail weight by using multiple regression and principal component analysis. the eleven characters includes, body weight, fat-tail length, fat-tail circumference, width and diameters in 3 position of upper, middle and lower before the slaughter, and also fat-tail weight after the s...

Abstract Length-weight relationships (LWR) were determined for Brotula barbata , Dentex angolensis macrophthalmus Neomerinthe folgori and Scorpaena stephanica using individual fish records collected between July 2002 January 2003, during a pilot project of experimental fishing over the shelf off Guinea Bissau. Fishes caught by commercial vessels bottom longline, measured defrost total length (t...

  Estimates of age, growth parameters, length-weight relationship and length and age at first maturity of the otolithes ruber are required for fishery management. We used counting annuli on the section of sagittal otoliths to age O.ruber from the Northwest Persian Gulf in south of Iran. Estimated ages ranged from 0 to 6 years, and maximum frequency of fishes was observed in age-group 1. The val...