A STAGE-BASED POPULATION-MODEL FOR LOGGERHEAD SEA-TURTLES AND IMPLICATIONS FOR CONSERVATION
A STAGE-BASED POPULATION-MODEL FOR LOGGERHEAD SEA-TURTLES AND IMPLICATIONS FOR CONSERVATION
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DOI：
10.2307/1939225
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发表时间：
1987-10-01
期刊：
影响因子：
4.8
通讯作者：
CASWELL, H
中科院分区：
文献类型：
--
作者：
CROUSE, DT;CROWDER, LB;CASWELL, H
目前对许多物种的管理是建立在对其种群动态了解不足的基础上的。缺乏特定年龄的人口统计信息，特别是长寿的陆生物种，阻碍了有用模型的开发。我们使用Lefkovitch阶段类矩阵模型，基于Frazer(1983 A)开发的初步生命表，指出临时管理措施，并确定那些对完善我们对受威胁的十字头海龟(Caretta Aretta)种群动态的知识最关键的数据。种群预测被用来检验弗雷泽S生命表对参数估计变化的敏感性，以及种群对各种管理选择的可能反应。目前的管理做法似乎集中在反应最慢的生命阶段，即筑巢海滩上的卵。替代保护措施，如使用海龟排除器(TED)，可能要有效得多。
Management of many species is currently based on an inadequate understanding of their population dynamics. Lack of age-specific demographic information, particularly for long-lived iteroparous species, has impeded development of useful models. We use a Lefkovitch stage class matrix model, based on a preliminary life table developed by Frazer (1983 a), to point to interim management measures and to identify those data most critical to refining our knowledge about the population dynamics of threatened loggerhead sea turtles (Caretta caretta). Population projections are used to examine the sensitivity of Frazer''s life table to variations in parameter estimates as well as the likely response of the population to various management alternatives. Current management practices appear to be focused on the least responsive life stage, eggs on nesting-beaches. Alternative protection efforts for juvenile loggerheads, such as using turtle excluder devices (TEDs), may be far more effective.