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首页> 外文期刊>Journal of Molluscan Studies >Modelling population density of Pinna nobilis (Bivalvia) on the eastern and southeastern coast of Tunisia
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Modelling population density of Pinna nobilis (Bivalvia) on the eastern and southeastern coast of Tunisia

机译：突尼斯东部和东南沿海的Pinna nobilis（Bivalvia）人口密度建模

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摘要

The distribution and density of Pinna nobilis was assessed along the eastern and southeastern coasts of Tunisia, based on line-transect data collected by SCUBA diving. An information-theory approach was followed for inference, and generalized additive models were fitted to model the population density of fan mussels using environmental and spatial covariates. The density of fan mussels was significantly correlated with depth and the distance from the city of Gabes. The fan mussel density was practically zero in very shallow water (<0.3 m depth) and increased with depth within the depth range of this study (0–6 m). The species was observed within Posidonia oceanica, Cymodocea nodosa and Caulerpa prolifera beds, with no evident difference in density among habitats. Zero fan mussel densities were observed near the city of Gabes. Population density increased with the distance from Gabes and was higher in the south than in the north. This decline of P. nobilis density near Gabes could be an effect of marine pollution due to the dumping of large quantities of phosphogypsum and other chemical products and the associated degradation of the benthic habitats in the area during recent decades.
机译：根据由SCUBA潜水收集的线状剖面数据，评估了突尼斯东部和东南沿海的Pinna nobilis分布和密度。遵循信息论方法进行推理，并使用环境和空间协变量拟合了广义加性模型来模拟扇贝的种群密度。扇贝的密度与深度和距加贝斯市的距离显着相关。在非常浅的水中（<0.3 m深度）扇贝贻贝密度实际上为零，并且在本研究的深度范围内（0-6 m）随深度增加。该物种在大洋波塞多尼亚，Cymodocea nodosa和Caulerpa繁殖床中观察到，生境间密度没有明显差异。在加贝斯市附近发现扇贝贻贝密度为零。人口密度随着与加布斯的距离增加而增加，在南部高于北部。近几十年来，由于大量磷石膏和其他化学产品的倾倒以及该地区底栖生物的相关退化，加布斯附近的新月疫杆菌密度的下降可能是海洋污染的结果。

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    《Journal of Molluscan Studies》 |2010年第4期|p.340-347|共8页
  • 作者

    Lotfi Rabaoui; Sabiha Tlig-Zouari; Stelios Katsanevakis;

  • 作者单位

    Research Unit of Biology, Ecology and Parasitology of Aquatic Organisms, Department of Biology, Faculty of Science of Tunis, University Campus, El Manar 2092, Tunis, Tunisia;

    Research Unit of Biology, Ecology and Parasitology of Aquatic Organisms, Department of Biology, Faculty of Science of Tunis, University Campus, El Manar 2092, Tunis, Tunisia;

    Institute of Marine Biological Resources, Hellenic Centre of Marine Research, 46.7 km Athens-Sounio, 19013 Anavyssos, Greece;

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