ENSO and the rise and fall of a tilapia fishery in northern Colombia
ENSO and the rise and fall of a tilapia fishery in northern Colombia
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DOI：
10.1016/j.fishres.2007.07.015
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发表时间：
2007-12-01
影响因子：
2.4
通讯作者：
Viloria, Efrain A.
中科院分区：
文献类型：
--
作者：
Blanco, Jacobo A.;Barandica, Juan Carlos Narvaez;Viloria, Efrain A.
从ENSO变率的角度描述和分析了Pajarales泻湖复合体(PC)罗非鱼渔业丰度的显著年际变化。这种外来物种受益于1996年、1999年和2000年拉尼娜年发生的连接该水系与马格达莱纳河的渠道工程和有利的气候-水文变化。后来，在2001-2005年，罗非鱼种群几乎在泻湖系统中消失了。对盐度浓度的不耐受似乎限制了罗非鱼在PC中的分布和丰度。提出了当地个体渔业罗非鱼相对丰度随盐度变化和ENSO强度变化的非线性模型，作为ENSO指标--南方振荡指数异常。虽然模型的预测能力仍然与ENSO事件的实际预测相联系，但给出了渔业管理提示。(C)2007 Elsevier B.V.保留所有权利。
The remarkable interannual abundance variation in a tilapia (Oreochromis niloticus) fishery in Pajarales lagoon Complex (PC) is described and analyzed from the point of view of ENSO variability. This exotic species benefited from channeling works connectin the system with Magdalena River and favorable climate-hydrological changes, which took place in La Nina years 1996, 1999 and 2000. Later, in 2001-2005, the tilapia population practically disappeared in the lagoon system. Intolerance to salinity concentrations > 10 seemed to act as a restraint for distribution and abundance of tilapias in PC. Non-linear models to explain the relative abundance variability of tilapias in the local artisanal fishery with salinity changes and ENSO intensity, measured as southern oscillation index anomaly, an ENSO indicator, are proposed. Fishery management hints are given, though the predictive ability of models remains linked to the actual forecast of ENSO events. (C) 2007 Elsevier B.V. All rights reserved.