Among the thermophilic fishes that have become established in the north-western Mediterranean as a consequence of sea warming, the yellowmouth barracuda (Sphyraena viridensis Cuvier, 1829) appears to be one of the most successful and abundant in the coastal rocky environment, having increasingly become object of recreational and commercial exploitation in the study area. Lure-fishing sessions were carried out from May 2016 to November 2018 in the Catalan Sea (NE Spain) at dawn and dusk, with the aim of providing new insight into the behavioural, spatial and feeding ecology and vulnerability to angling of this poorly known species. Generalized mixed-effects linear models showed that S. viridensis is a crepuscular inshore dweller, whose vulnerability to angling is significantly influenced by solar and lunar light intensities, being highest in the pre-spawn and spawning periods. Asymmetries between dawn and dusk activity patterns were detected, evidently related to a drop in aggressiveness at dusk following the spawning period. The simple study design adopted may be applied to other contexts, aiming to the recognition of several levels of fish vulnerability to angling.

中文翻译：

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黄口梭鱼（Sphyraena viridensis Cuvier，1829）的黄昏活动模式和钓鱼脆弱性，一种范围扩大的嗜热鱼

在由于海水变暖而在地中海西北部定居的嗜热鱼类中，黄口梭鱼（Sphyraena viridensis Cuvier，1829）似乎是沿海岩石环境中最成功和最丰富的鱼类之一，越来越成为研究区的娱乐和商业开发对象。2016 年 5 月至 2018 年 11 月，黎明和黄昏在加泰罗尼亚海（西班牙东北部）进行了诱饵钓鱼活动，目的是提供对这种鲜为人知的物种的行为、空间和喂养生态以及钓鱼脆弱性的新见解. 广义混合效应线性模型表明，S. viridensis 是一种黄昏的近海居民，其钓鱼的脆弱性受到太阳和月球光强度的显着影响，在产卵前和产卵期最高。检测到黎明和黄昏活动模式之间的不对称，这显然与产卵期后黄昏时攻击性下降有关。所采用的简单研究设计可应用于其他情况，旨在识别鱼类易受钓鱼影响的几个级别。