Some Ecological Indices in Flemish Cap derived from the surveys conductec by EU between 1988 and 2006
Some ecological indices were calculated from the data obtained in the research surveys conducted by EU (Spain and Portugal) in Flemish Cap between the years 1988 and 2006. These indices were calculated for individual populations (intrinsic population rate of growth and mean length of catch) and for...
| Main Authors: | , |
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| Format: | Report |
| Language: | English |
| Published: |
2007
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10508/612 http://hdl.handle.net/10261/328015 |
| Summary: | Some ecological indices were calculated from the data obtained in the research surveys conducted by EU (Spain and Portugal) in Flemish Cap between the years 1988 and 2006. These indices were calculated for individual populations (intrinsic population rate of growth and mean length of catch) and for all the community (ABC curves, indices about faunal diversity, proportion of non-commercial species, mean length in community and size spectra). We use the data of twenty seven species captured in the survey year by year, included the Pandalus borealis. The data of the Pandalus borealis and the Sebastes juveniles have a great influence in the value of the indices, as their abundance is very high in relation to their contribution to the biomass. The indices present a general stable pattern. Despite the moratorium of the principal commercial species of the bank of Flemish Cap it seems not to be recovery of the general community. |
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