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A trophic model of the Lesser Antilles Pelagic Ecosystem - Scientific Basis for Ecosystem-Based Management in the Lesser Antilles Including Interactions with Marine Mammals and Other Top Predators (LAPE)

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Year of publication 2008

Pages 168

Author Elizabeth Mohammed, Marcelo Vasconcellos, Steve Mackinson, Paul Fanning, Sherry Heileman and Fabio Carocci;Fishery and Aquaculture Economics and Policy Division

Product type Project

Edition 1

Synopsis (short abstract) An Ecopath with Ecosim model describing the pelagic ecosystem of the waters surrounding the Lesser Antilles islands in the eastern Caribbean was constructed. It incorporates data derived from published sources as well as unpublished databases and data collection activities conducted by the FAO project

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Scientific Basis For Ecosystem-Based Management In The Lesser Antilles Including Interactions With Marine Mammals And Other Top Predators: A Trophic Model Of The Lesser Antilles Pelagic Ecosystem, by Elizabeth Mohammed; Marcelo Vasconcellos; Steve Mackinson; Paul Fanning; Sherry Heileman; Fabio Carocci. FAO, Barbados, 2008. xiii + 168 pp. 14 Tables and 61 Figures. FI:GCP/RLA/140/JPN. Technical Document No. 2

Language English

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    Project
    Derivation of diet compositions in the Lesser Antilles Pelagic Ecosystem
    Scientific Basis for Ecosystem-Based Management in the Lesser Antilles Including Interactions with Marine Mammals and Other Top Predators (LAPE)
    2008
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    One of the medium-term objectives of the LAPE project is to enable fishery institutions in the Lesser Antilles to implement ecosystem approach to fisheries (EAF) management of the pelagic fisheries. An immediate objective of LAPE is the formulation of a food web model of the ecosystem to better understand the effects of fisheries on predator–prey relationships, and of the effects of food web dynamics on fisheries. This report presents average diet compositions of the 29 predator func tional groups, which include seabirds, marine mammals, turtles, fish, squid and zooplankton, in the LAPE model. The data were obtained through field sampling and analysis of stomach contents of a number of species of large and medium sized pelagic fish and marine mammals, as well as through a comprehensive search of published and unpublished literature. Data from 131 studies, of which about 8 percent were from the LAPE area, were used to derive the average diet compositions presented in this report. Despite the scarcity of data from within the LAPE area itself, a reasonable amount of data on same or similar species was available from adjacent areas in the Western Atlantic, including the Caribbean, and other areas mainly in the Atlantic. As expected, the availability of diet information was directly related to the commercial importance of the species. The analysis presented here does not consider differences in diet compositions arising from predator ontogenic changes and size, or seasonal changes in diets. A major problem encountered in a number of the studies was the low level of taxonomic disaggregation of the prey and relatively high proportion of unidentified prey items. Further studies are needed to better quantify diet compositions of the species in the LAPE ecosystem, including non-commercial species that might play an important ecological role.
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    Project
    Assessment of fisheries management issues in the Lesser Antilles and the ecosystem approach to fisheries management
    Scientific Basis for Ecosystem-Based Management in the Lesser Antilles Including Interactions with Marine Mammals and Other Top Predators (LAPE)
    2008
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    The LAPE project aims to apply Ecosystem Approach to Fisheries (EAF) principles to ecosystem management planning for pelagic resources in the LAPE area by making use of the best scientific information available. Part one of this document reports on the outcome of nine national EAF workshops to identify and prioritize ecosystem issues covering ecological well-being, human well-being, and ability to achieve categories. The Ecologically Sustainable Development (ESD) reporting framework was used as the exploratory tool to identify the main issues and risk associated with the pelagic fishery. In total, 134 individuals participated in national workshops, including fisheries officers, fishers, and other government agencies. On average 123 issues were proposed and prioritized per workshop. Issues rated as moderate to extreme risk to the fishery were pooled to determine common issues and trends amongst countries. Twenty-four major priority issues were identified of which four were selected for policy exploration using Ecopath with Ecosim (EwE) and non EwE. The document concludes with operational objectives and management recommendations for issues selected for detailed policy exploration. Part two of this document reports on EAF management workshops conducted in LAPE participating countries.
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