Determination of the Appropriate Hanging Ratios to Ease the Escape of Juvenile Red Mullet (Mullus barbatus L., 1758) and Annular Sea Bream (Diplodus annularis L., 1758) from a Trawl Codend
Articles > Article · 2003
Authors: Zafer TOSUNOĞLU, Yeliz Doǧanyilmaz Özbilgin, Hüseyin Özbilgin
Turkish Journal of Veterinary and Animal Sciences, Journal Indexed in SCI Expanded, International, Scopus, 2003, vol 27, pp 1193-1199
Summary
This study investigates the relationship between total length (TL) and fork length (FL), girth (G), height (H) and width (W) of red mullet (Mullus barbatus) (n = 953) and annular sea bream (Diplodus annularis) (n = 944) collected during trawl selectivity trials carried out in İzmir Bay between July 1996 and February 1997. The FL, G, H and W of red mullet were 89, 53, 20 and 11% of the TL, respectively. For annular sea bream these values were 91, 80, 34 and 11%, respectively. The ratios for average body thickness (W/H) were 0.573 for red mullet and 0.319 for annular sea bream. The hanging ratios (E RM and EASB) of codends designed to ease the escape of juveniles of these species were 0.497 for red mullet and 0.304 for annular sea bream.