In this study, length–weight relationships were estimated for discarded trawl fish species and mean size at capture was compared with reported mean length at first maturity (L_m). Sampling was conducted in Sığacık Bay, on the Turkish coast of the central Aegean Sea, between October 2008 and April 2010 onboard a commercial trawler fishing over a depth range of 88–450 m. A total of 14,120 individuals from 15 fish species belonging to 13 families were examined: 9 species were elasmobranchs and 6 were teleosts. Length-weight relationship (LWR) values of b parameter varied between 2.55 and 3.37, with five species having isometric growth, five negative and six positive allometric growth. LWR was not determined for one species due to insufficient sample size. Average size at capture for 14 fish species was found to be below the reported L_m. Our results could be useful in stock assessments and serve as a reference for future comparison of similar parameters estimated in other parts of the Aegean Sea or Mediterranean. Furthermore, information on the discard species in the trawl fishery, their mean size at capture and conservation status is important when considering sustainable ecosystem based fishery management.

在这项研究中，估计了丢弃的拖网鱼物种的长度与重量的关系，并将捕获时的平均大小与首次成熟时报告的平均长度进行比较（L _m）。在2008年10月至2010年4月之间，在爱琴海中部土耳其海岸的Sığacık湾进行了取样，该渔船在88-450 m的深度范围内进行捕鱼。共检查了来自13个科的15种鱼类的14,120个人，其中9种是弹性bra，6种是硬骨鱼。b参数的长度-重量关系（LWR）值在2.55和3.37之间变化，其中五种具有等长增长，五种负向增长和六种正向异速增长。由于样本量不足，未确定一种物种的LWR。发现14种鱼的平均捕获尺寸低于报告的L _m。我们的结果可能在种群评估中很有用，并为将来在爱琴海或地中海其他地区估计的类似参数进行比较提供参考。此外，在考虑基于生态系统的可持续渔业管理时，有关拖网渔业中丢弃物种类，其捕获和保护状况的平均大小的信息也很重要。