Life history traits of the Black Sea whiting Merlangius merlangus (Gadidae): compliance with the temperature-size rule

IF 1.4 4区环境科学与生态学 Q3 ECOLOGY

Environmental Biology of Fishes Pub Date : 2024-01-24 DOI:10.1007/s10641-024-01513-6

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Abstract

The sex ratio, size, age, growth, maturation, gonado-somatic index, and mortality of the Black Sea whiting Merlangius merlangus (Linnaeus, 1758) were studied. The ecological and geographical variabilities of its life-history traits were analyzed in terms of its compliance with the temperature-size rule (TSR). Overall, 1148 individuals were examined from 2019 to 2022. The sex ratio in catches was biased towards females (1:0.14). The maximum (total) length of the females was 36.4 cm; that of the males 21 cm; the corresponding weights and ages were 582 g and 7 years and 66.5 g and 4 years, respectively. The values of the Bertalanffy equation parameters were L_∞ = 30.8 cm, W_∞ = 207 g, and K = 0.16 year⁻¹ for females and L_∞ = 20.8 cm, W_∞ = 57.7 g, and K = 0.29 year⁻¹ for males, while the mean length at first maturity was 14.13 ± 0.13 cm for the females and 12.14 ± 0.06 cm for the males. The highest spawning activity was observed from January to March. The exploitation rate in females was E = F/Z = 0.67, indicating high fishing pressure. The Mediterranean and Black Sea whiting is characterized by smaller sizes and shorter lifespan than individuals in Northern, colder areas. Thus, its size, and lifespan are expected to decrease with climate warming.

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黑海鳕鱼 Merlangius merlangus（鳕科）的生活史特征：符合温度-大小规则

摘要研究了黑海鳕鱼 Merlangius merlangus (Linnaeus, 1758) 的性别比、大小、年龄、生长、成熟、性腺指数和死亡率。根据其是否符合温度-大小规则（TSR），分析了其生命史特征的生态和地理变异性。从 2019 年到 2022 年，共研究了 1148 个个体。捕获量的性别比例偏向雌性（1:0.14）。雌鱼的最大（总）体长为 36.4 厘米，雄鱼为 21 厘米；相应的体重和年龄分别为 582 克和 7 岁以及 66.5 克和 4 岁。雌鱼的贝塔朗菲方程参数值为 L∞ = 30.8 厘米，W∞ = 207 克，K = 0.16 年-1；雄鱼的贝塔朗菲方程参数值为 L∞ = 20.8 厘米，W∞ = 57.7 克，K = 0.29 年-1；雌鱼和雄鱼的初熟平均体长分别为 14.13 ± 0.13 厘米和 12.14 ± 0.06 厘米。1 月至 3 月的产卵活动最为活跃。雌性的开发率为 E = F/Z = 0.67，表明捕捞压力很大。地中海和黑海鳕鱼与北方寒冷地区的鳕鱼相比，体型较小，寿命较短。因此，随着气候变暖，预计鳕鱼的体型和寿命都会缩短。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Biology of Fishes 环境科学-海洋与淡水生物学

CiteScore

2.60

自引率

14.30%

发文量

169

审稿时长

3 months

期刊介绍： Environmental Biology of Fishes is an international journal that publishes original studies on the ecology, life history, epigenetics, behavior, physiology, morphology, systematics and evolution of marine and freshwater fishes. Empirical and theoretical papers are published that deal with the relationship between fishes and their external and internal environment, whether natural or unnatural. The journal concentrates on papers that advance the scholarly understanding of life and draw on a variety of disciplines in reaching this understanding. Environmental Biology of Fishes publishes original papers, review papers, brief communications, editorials, book reviews and special issues. Descriptions and submission requirements of these article types can be found in the Instructions for Authors.