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首页> 外文期刊>Aquatic Biology >Modelling habitat associations of 14 species of holothurians from an unfished coral atoll: implications for fisheries management.
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Modelling habitat associations of 14 species of holothurians from an unfished coral atoll: implications for fisheries management.

机译：对未捕捞的珊瑚环礁中14种整形鱼类的栖息地协会进行建模：对渔业管理的意义。

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Currently there is no commercial or subsistence fishing for holothurians on the Cocos (Keeling) Islands and, despite a prominent government presence, no reported cases of poaching or illegal fishing. However, because of recent interest in developing a commercial fishery for holothurians there, a survey was initiated to provide baseline data on the previously unfished local holothurian populations. Fourteen species of holothurians were recorded during the survey, with the most abundant species being Holothuria atra; only 4 other species had relatively high abundances. A total of 20556 holothurians were counted; however, 97% of these were considered to be of low commercial value. The high- and medium-value species found in this survey were all in extremely low abundances, with restricted distributions. The distribution and abundance of holothurians was closely linked with benthic habitats, with 48% of the variation in holothurian populations explained by 13 habitat variables. Several species displayed distinct habitat preferences: H. atra was associated with sand-dominated habitats, Actinopyga mauritiana was associated with relic reefs and soft corals, while Holothuria fuscopunctata and Stichopus herrmanni were both associated with reef flats. The densities recorded in the present study represent the natural abundance and distribution of holothurian populations at this atoll. Given the low numbers of commercially important species, it is highly unlikely that a commercial fishery would be economically viable at the Cocos (Keeling) Islands and it would be more beneficial to maintain the natural holothurian population.Digital Object Identifier http://dx.doi.org/10.3354/ab00381
机译：目前，在科科斯（基林）群岛上，没有针对全人类的商业捕鱼或自给自足的捕鱼活动，尽管政府占据重要位置，也没有关于偷猎或非法捕鱼的报道。但是，由于最近有兴趣在此开发一种用于当地居民的商业渔业，因此启动了一项调查，以提供以前未捕捞的当地当地居民的基线数据。调查期间记录了14种全州人种，其中最丰富的是<全州人种>。只有另外4个物种具有相对较高的丰度。总共计入了20556名全人类。但是，其中的97％被认为具有较低的商业价值。在这项调查中发现的高价值和中值物种全都处于极低的丰度，分布受到限制。底栖动物的分布和丰富度与底栖生境密切相关，其中13个生境变量解释了底栖动物种群变化的48％。几种物种表现出不同的生境偏好：H。 atra 与以沙子为主的栖息地有关， Actinopyga mauritiana 与遗迹礁石和软珊瑚有关，而 Holothuria fuscopunctata 和 Stichopus herrmanni 都与礁滩有关。在本研究中记录的密度代表了该环礁全人类的自然丰度和分布。鉴于商业上重要物种的数量很少，商业捕鱼在科科斯（基林）群岛上经济上可行的可能性很小，而且对保持自然的全人类而言更有利。数字对象标识符http：// dx。 doi.org/10.3354/ab00381

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