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与渔业社区的距离解释了在执行不力的禁捕区鱼类的丰富程度。

Distance from a fishing community explains fish abundance in a no-take zone with weak compliance.

作者信息

Advani Sahir, Rix Laura N, Aherne Danielle M, Alwany Magdy A, Bailey David M

机构信息

Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, United Kingdom.

Department of Marine Science, Faculty of Science, Suez Canal University, Ismailia, Egypt.

出版信息

PLoS One. 2015 May 7;10(5):e0126098. doi: 10.1371/journal.pone.0126098. eCollection 2015.

Abstract

There are numerous examples of no-take marine reserves effectively conserving fish stocks within their boundaries. However, no-take reserves can be rendered ineffective and turned into 'paper parks' through poor compliance and weak enforcement of reserve regulations. Long-term monitoring is thus essential to assess the effectiveness of marine reserves in meeting conservation and management objectives. This study documents the present state of the 15-year old no-take zone (NTZ) of South El Ghargana within the Nabq Managed Resource Protected Area, South Sinai, Egyptian Red Sea. Previous studies credited willing compliance by the local fishing community for the increased abundances of targeted fish within the designated NTZ boundaries compared to adjacent fished or take-zones. We compared benthic habitat and fish abundance within the NTZ and the adjacent take sites open to fishing, but found no significant effect of the reserve. Instead, the strongest evidence was for a simple negative relationship between fishing pressure and distance from the closest fishing village. The abundance of targeted piscivorous fish increased significantly with increasing distance from the village, while herbivorous fish showed the opposite trend. This gradient was supported by a corresponding negative correlation between the amount of discarded fishing gear observed on the reef and increasing distance from the village. Discarded fishing gear within the NTZ suggested decreased compliance with the no-take regulations. Our findings indicate that due to non-compliance the no-take reserve is no longer functioning effectively, despite its apparent initial successes and instead a gradient of fishing pressure exists with distance from the nearest fishing community.

摘要

有许多无捕捞海洋保护区在其边界内有效养护鱼类种群的例子。然而,由于保护区法规的遵守情况不佳和执行不力,无捕捞保护区可能会变得无效,变成“纸上公园”。因此,长期监测对于评估海洋保护区在实现保护和管理目标方面的有效性至关重要。本研究记录了位于埃及红海西奈半岛南部纳卜克管理资源保护区内已有15年历史的南埃尔加尔加纳无捕捞区(NTZ)的现状。此前的研究认为,与相邻的捕捞区或可捕捞区相比,当地渔业社区的自愿遵守使得指定NTZ边界内目标鱼类的数量有所增加。我们比较了NTZ内和相邻的可捕捞地点的底栖生境和鱼类丰度,但未发现该保护区有显著影响。相反,最有力的证据是捕捞压力与到最近渔村的距离之间存在简单的负相关关系。随着与村庄距离的增加,目标食鱼性鱼类的丰度显著增加,而草食性鱼类则呈现相反的趋势。这种梯度得到了在珊瑚礁上观察到的废弃渔具数量与离村庄距离增加之间相应负相关的支持。NTZ内的废弃渔具表明对无捕捞规定的遵守有所下降。我们的研究结果表明,尽管该无捕捞保护区最初取得了明显成功,但由于不遵守规定,它已不再有效运作,相反,随着与最近渔业社区距离的增加,存在着捕捞压力梯度。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e973/4423979/2516f004d228/pone.0126098.g001.jpg

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