PRESENT STATUS OF THE MAIN SHADS’ POPULATIONS IN PORTUGAL.
The allis shad (Alosa alosa) and the twaite shad (Alosa fallax) are anadromous migratory species, which are threatened not only in Portugal but also in most of their geographic area of distribution. Overfishing and illegal fishing, pollution, physical barriers and river-bed changes seem to be the ma...
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| Główni autorzy: | , , , , , , |
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| Format: | Artigo |
| Język: | Inglês |
| Wydane: |
EDP Sciences
2001-07-01
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| Seria: | Knowledge and Management of Aquatic Ecosystems |
| Hasła przedmiotowe: | |
| Dostęp online: | http://dx.doi.org/10.1051/kmae:2001040 |
| Etykiety: |
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