Length-Weight Relationships for Fourteen Fish Species Collected by Bottom Trawl From the Eastern Black Sea Coast, Turkey

Göktuğ DALGIÇ,Hatice ONAY

doi:10.33714/masteb.881256

Göktuğ DALGIÇ, Hatice ONAY

Open Access

https://doi.org/10.33714/masteb.881256

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Abstract

Length-weight relationships (LWR) were described for fourteen demersal and pelagic fish species; whiting (Merlangius merlangus), red mullet (Mullus barbatus), picarel (Spicara maena), scorpion fish (Scorpaena porcus), anchovy (Engraulis encrasicolus), sprat (Sprattus sprattus), horse mackerel (Trachurus mediterraneus), bluefish (Pomatomus saltatrix), turbot (Scophthalmus maximus), thornback ray (Raja clavata), shore rockling (Gaidropsarus mediterraneus) round goby (Neogobius melanostomus), black goby (Gobius niger) and stargazer (Uranoscopus scaber) caught with bottom trawl (12 mm mesh size) from the Eastern Black Sea. Samples were caught in depths from 10 m up to 60 m between April 2017 and March 2018 at monthly intervals. The minimum and maximum lengths and weights, length-weight relationships, parameters of a and b, ± 95% CI of b, r2, growth type (isometric or allometric) of samples, and statistical analyses of the relationship were determined. Estimates for parameter b of the length–weight relationship ranged between 2.44 and 3.54.

Highlights

The Black Sea is the world’s largest land-locked inland sea (Bakan & Büyükgüngör, 2000)
This study aims to provide data on the length-weight relationship for the 14 fish species captured by bottom trawl from the coastal waters of the Eastern Black Sea, Turkey
For fish species that were at a high number, the sub-sampling method was applied in order to measure the length and weight values

Summary

Introduction

The Black Sea is the world’s largest land-locked inland sea (Bakan & Büyükgüngör, 2000). It has been exposed to environmental fluctuations and strong anthropogenic stresses (Bologa, 2001). In the Eastern part of the Black sea, the fishing grounds are quite different and the big rivers (Bzyb, Kodori, Inguri of Rio and Çoruh River) flows into the Black Sea from. The rivers change the physico-chemical properties parallel to the food spectrum of the environment (Berkün et al, 2010). This may play an important role in determining the nutrient composition, quantity and quality of the environment. The length-weight relationship (LWR) has great importance in fish biology, physiology, ecology and fishery assessment (Gonçalves et al, 1997; Silva et al, 2013)

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