Stazione Zoologica Anton Dohrn, Department of Integrative Marine Ecology. Sede Interdipartimentale della Sicilia, Lungomare Cristoforo Colombo (Complesso Roosevelt), 90149, Palermo, Italy; NBFC, National Biodiversity Future Center, Palermo, Italy.
Stazione Zoologica Anton Dohrn, Department of Integrative Marine Ecology. Sede Interdipartimentale della Sicilia, Lungomare Cristoforo Colombo (Complesso Roosevelt), 90149, Palermo, Italy; Dipartimento di Scienze della Vita e dell'Ambiente (DiSVA), Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy.
Mar Environ Res. 2023 Nov;192:106217. doi: 10.1016/j.marenvres.2023.106217. Epub 2023 Oct 14.
The shortfin mako (Isurus oxyrinchus) is the second most fishery-exploited pelagic shark in the Mediterranean Sea, thus its conservation status is a cause for concern. Despite the species has been listed in fishery and trade regulations to hinder its population decline, the lack of knowledge on its distribution patterns and habitats essential for its persistence still hampers the implementation of sound conservation actions. Combining data from local expert knowledge, opportunistic catch records, and Baited Remote Underwater Videos, we show evidence of the interannual presence of young-of-the-year (YOY) I. oxyrinchus in the Pelagie Archipelago (Central Mediterranean Sea). A total of twenty-one individuals ranging 71-92.5 cm FL were incidentally caught (on average 2.3 YOY/1000 hooks) or documented on BRUVS in July and August over three consecutive years. These data coupled with questionnaires administered to longline fishers identify one specific area used by YOY in the summer months. Our study presents the most abundant record of YOY shortfin makos in the Mediterranean Sea within such a restricted time and limited area providing important information for improving the protection of this critically endangered species.
短鳍灰鲭鲨（Isurus oxyrinchus）是地中海第二大被过度捕捞的远洋鲨鱼，因此其保护状况令人担忧。尽管该物种已被列入渔业和贸易法规，以阻止其数量减少，但对其生存至关重要的分布模式和栖息地的知识仍然缺乏，这仍然阻碍了合理保护措施的实施。我们结合了来自当地专家知识、偶然捕捞记录和诱捕式水下视频的数据，证明了幼鲨（YOY）短鳍灰鲭鲨在 pelagie 群岛（地中海中部）存在年际变化。在连续三年的 7 月和 8 月，共有 21 条个体（全长 71-92.5 厘米）在该地区被偶然捕获（平均每 1000 个鱼钩 2.3 条 YOY）或在 BRUVS 上记录。这些数据加上对延绳钓渔民的问卷调查，确定了夏季幼鲨使用的一个特定区域。我们的研究在如此有限的时间和有限的区域内提供了地中海幼鲨最丰富的记录，为改善对这一极度濒危物种的保护提供了重要信息。
