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首页> 外文期刊>Ocean & coastal management >Assessment of sea cucumber populations from the Aegean Sea (Turkey): First insights to sustainable management of new fisheries
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Assessment of sea cucumber populations from the Aegean Sea (Turkey): First insights to sustainable management of new fisheries

机译：评估爱琴海（土耳其）海参种群：对新渔业可持续管理的初步见解

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摘要

Sea cucumber stocks have been overfished in many countries. As a consequence, several species (Hol-othuria polii, Holothuria tubulosa and Holothuria mammata) are now caught in Turkish waters without adequate knowledge on their biology and ecology. Here, we address their morphometry, relationships among gutted length and weight, population dynamics, temporal evolution of catches, and we provide the first insights about technical aspects of their fisheries. The largest size classes of H. polii are missing from our sampling collection, possibly due to the heavy fishery pressure on this species. Significant differences in the eviscerated length and weight were found among the Turkish sampled localities for H. polii and H. tubulosa, respectively. These differences could be explained by higher food availability in some areas and/or differential fishery pressure. The size and weight of H. tubulosa specimens were smaller than those registered for the same species in Greek waters, where this species is not fished. All the studied species showed allometric growth. In the last two years, the sea cucumber fishery in Turkey has been increasing rapidly, reaching a total production of ca. 555 000 kg in 2012 (80% H. polii and 20% H. tubulosa plus H. mammata). For a correct management of these species, we recommend: 1) the re-establishment of species-specific closed fishery season according to the specific reproductive cycle; 2) the assessment of the exploited stocks from the Northern Turkish coasts with estimates of recovery time of their populations; 3) the reduction of fishery efforts, mainly on H. polii and H. tubulosa and 4) the establishment of protected areas (where sea cucumber fisheries are forbidden) to conserve healthy populations which will favour the recruitment on nearby areas.
机译：在许多国家，海参种群已被过度捕捞。结果，现在在土耳其水域中捕获了几种物种（小孔霍利氏菌（Hol-othuria polii），小叶霍洛索氏菌（Holothuriatubulosa）和大叶霍洛索氏菌（Holothuria mammata）），而对其生物学和生态学没有足够的了解。在这里，我们讨论它们的形态，内脏长度和重量之间的关系，种群动态，渔获物的时间演变，并提供有关其渔业技术方面的第一见解。我们的样本收集中没有最大规格的H. polii菌，这可能是由于该物种的沉重渔业压力造成的。在土耳其的H. polii和H.tubulosa采样地点之间，在内脏长度和重量上存在显着差异。这些差异可以通过某些地区较高的食物供应量和/或不同的渔业压力来解释。在希腊水域，不捕捞该物种的小管虫标本的大小和重量都小于同一物种的标本。所有研究的物种均表现出异速生长。在过去的两年中，土耳其的海参捕捞业一直在迅速增长，达到了约200万吨的总产量。 2012年为55.5万公斤（80％的poli。H.和20％的tubulosa加上H. mammata）。为了正确管理这些物种，我们建议：1）根据特定的繁殖周期重新建立特定物种的封闭捕捞季节； 2）对土耳其北部海岸被开发种群的评估，并对其种群的恢复时间进行估算； 3）减少渔业工作，主要是在polii和H.tubulosa上的渔业； 4）建立保护区（禁止海参渔业），以保护健康的人口，这将有利于在附近地区的招募。

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  • 来源
    《Ocean & coastal management》 |2014年第5期|87-94|共8页
  • 作者

    Mercedes Gonzalez-Wangueemert; Mehmet Aydin; Chantal Conand;

  • 作者单位

    Centro de Ciencias do Mar (CCMAR), CIMAR-Laboratorio Associado, Universidade do Algarve, Cambelas, 8005-139 Faro, Portugal;

    Ordu University, Faculty of Marine Sciences, 52400 Fatsa, Ordu, Turkey;

    ECOMAR, Universite de La Reunion, Saint-Denis de La Reunion, Paris 97715, France;

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