Age composition, growth, and mortality of European hake Merluccius merluccius (Actinopterygii: Gadiformes: Merlucciidae) from the northern Aegean Sea, Turkey

Uzer, Uğur; Öztürk, Bayram; Yıldız, Taner

doi:10.3750/aiep/02465

Cited by 8 publications

(8 citation statements)

References 27 publications

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“…Overviewing the literature and data regarding the length-weight parameters of European hake inhabiting (VRGOČ et al, 2004;SOYKAN et al, 2015;UZER et al, 2019), minor oscillations between all reported values of allometrical coefficient (b) were noted, but in general results of this study corresponds with the ones previously reported in a review of SARTOR et al (2017). Those slight allometrical coefficient deviations were expected since length -weight relationship as well as the derived parameters are closely related to geographical areas, sampling strategy, degree of stomach fullness, gonad maturity, sex, size range, health and general fish condition and preservation techniques (FROESE, 2006;JU et al, 2016;TESCH, 1971).…”

Section: Discussionsupporting

confidence: 87%

Reproductive traits of the European hake, Merluccius merluccius (L. 1758), in the Adriatic Sea

Zorica

Šestanović

Pleić

et al. 2021

Acta Adriat. (Online)

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Within this paper, reproduction traits of the Adriatic population European hake, Merluccius merluccius (Linnaeus, 1758), were investigated. Specimens of the target species were monthly collected (N=1173) during 2019 along the eastern Adriatic Sea with commercial bottom trawlers. Overall, European hake total body length varied between 15.5 and 49.5 cm (mean±SD=27.5±5.0 cm) and domination of females was noted in larger length classes (TL>31.0 cm). The sexual ratio of all specimens was m/f=0.64; male prevalence was established over the year, except during the spawning peaks (December, June) when the sex ratio was in favour of the females. According to European hake’s maturity stages, gonad weights, gonadosomatic indexes and histological analysis of the gonad tissues, this species in Adriatic spawn twice in one year; the spawning period was from December to February, while second smaller signs of spawning were observed at the beginning of the summer, in June. 50% of the European hake male and female specimens sexually matured at 20.7 cm and 22.4 cm of total length, respectively.

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Section: Discussionsupporting

confidence: 87%

Reproductive traits of the European hake, Merluccius merluccius (L. 1758), in the Adriatic Sea

Zorica

Šestanović

Pleić

et al. 2021

Acta Adriat. (Online)

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“…It is evaluated that the minimum length limit for fishing should be 23 cm. UZER et al (2019) reported that the minimum landing size in the Turkish waters should be increased from 20 cm to 25 cm to ensure at least single breeding of Merluccius merluccius. These values are very close to our findings.…”

Section: Discussionmentioning

confidence: 99%

Growth characteristics of the European hake, Merluccius merluccius (Linnaeus, 1758), inhabiting northeastern Mediterranean

Girgin

Başusta

2020

Acta Adriat. (Online)

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In this study, the age and some growth characteristics of the European hake, Merluccius merluccius, from the northeastern Mediterranean were examined during 2015-2016 fishing season. A total of 661 European hake ranging from 9.8 to 51.6 cm in total length was captured by commercial trawler. Female/male ratio was 1/1.15. Age determination was conducted using the sagittal otoliths. Ages of examined individuals ranged from 1 to 7 years. The von Bertalanffy growth parameters fitted to the average measured total lengths-at-age for each sex separately and estimated as L∞= 93.98 cm, k= 0.114 year-1, t0= -0.597 year for females, as L∞= 77.65 cm , k= 0.153 year-1, t0= -0.343 year for males and as L∞= 84.44 cm, k= 0.135 year-1, t0= -0.469 year for combined sexes. The growth performance value (Φ) of the European hake population was computed as 2.98 for combined sexes. Mean condition factor value for population was 0.654±0.021; the highest condition factor was found as 1.01 in fish at age 7.

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“…Fisheries management is important to ensure sustainable fisheries and must be adapted to meet the requirements of different fishing areas (Uzer et al 2019). Some population parameters, such as fish age and growth, must be studied to improve our understanding of fisheries biology and current management strategies, which are critical to preserve stocks into the future.…”

Section: Introductionmentioning

confidence: 99%

“…La gestión pesquera es importante para garantizar una pesca sostenible y debe adaptarse para cumplir con los requisitos de las diferentes áreas de pesca (Uzer et al 2019). Se deben estudiar algunos parámetros de la población, como la edad y el crecimiento de los peces, para mejorar nuestra comprensión de la biología pesquera y las estrategias de gestión actuales, que son fundamentales para preservar las poblaciones en el futuro.…”

Section: Introductionunclassified

First approximation of the growth and the spawning period of Symphodus ocellatus (Linnaeus, 1758) (Pisces: Labridae) in the southeastern Black Sea

Onay

2023

Cienc. Mar.

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The aim of this study was to provide a first approximation of the growth, reproduction, and length–weight relationships of Symphodus ocellatus in the southeastern Black Sea, Turkey. A total of 320 specimens (273 males, 47 females) were collected between June 2015 and May 2016, and their biological parameters were estimated for each sex and both sexes combined. Total length ranged from 6.90 to 13.70 cm and the parameters (a, b) in the power length–weight relationships were a = 0.065 and b = 2.38 for males and a = 0.102 and b = 2.20 for females. Age was successfully estimated by commonly accepted procedures for otolith analysis. The von Bertalanffy growth parameters from the otolith age estimation were L∞ = 12.66 cm, k = 0.764, and t0 = –1.151 (0–3 years) for males, and L∞ = 14.15 cm, k = 0.764, and t0 = –0.188 (1–3 years) for females. The monthly gonadosomatic index values reflected a spawning period between April and July, with a spawning peak in May–June. The present study provides the first estimate of the growth and reproduction of S. ocellatus in the southeastern Black Sea of Turkey and compares the results with those from other areas.

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Age composition, growth, and mortality of European hake Merluccius merluccius (Actinopterygii: Gadiformes: Merlucciidae) from the northern Aegean Sea, Turkey

Cited by 8 publications

References 27 publications

Reproductive traits of the European hake, Merluccius merluccius (L. 1758), in the Adriatic Sea

Reproductive traits of the European hake, Merluccius merluccius (L. 1758), in the Adriatic Sea

Growth characteristics of the European hake, Merluccius merluccius (Linnaeus, 1758), inhabiting northeastern Mediterranean

First approximation of the growth and the spawning period of Symphodus ocellatus (Linnaeus, 1758) (Pisces: Labridae) in the southeastern Black Sea

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