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Marine and continental distribution and dynamic of the early spawning migration of twaite shad (Alosa fallax (Lacépède, 1803)) and allis shad (Alosa alosa (Linnaeus, 1758)) in the north-west of the Iberian Peninsula
- Source :
- Marine and Freshwater Research. 67:1229
- Publication Year :
- 2016
- Publisher :
- CSIRO Publishing, 2016.
-
Abstract
- Knowledge regarding the marine phase of twaite shad (Alosa fallax (Lacépède, 1803)) and allis shad (Alosa alosa (Linnaeus, 1758)) remains limited. To understand the coastal and continental distribution and dynamic of migration of these species, in the present study we collected official data records of marine landings (kg), separated according to species, for all fish markets in Galicia (north-west of the Iberian Peninsula) and undertook freshwater field sampling campaigns. The findings indicate that both species of shad exhibit a coastal distribution near the rivers where they spawn, namely the Minho and Ulla rivers. Catches at sea declined from January, a phenomenon that can be understood as the onset of migration to the rivers. Bycatch reports are important because both A. fallax and A. alosa are listed in the Annex V of the European Union Habitats Directive, which lists animal species whose exploitation and taking in the wild may be subject to management measures. However, for a better management of these species it is necessary to understand the magnitude of displacements and connection of shad populations at sea.
- Subjects :
- 0106 biological sciences
food.ingredient
Aquatic Science
Oceanography
010603 evolutionary biology
01 natural sciences
food
media_common.cataloged_instance
Allis shad
European union
Ecology, Evolution, Behavior and Systematics
media_common
Fish migration
geography
Alosa
geography.geographical_feature_category
Ecology
biology
Continental shelf
010604 marine biology & hydrobiology
Estuary
biology.organism_classification
Spawn (biology)
Bycatch
Fishery
Subjects
Details
- ISSN :
- 13231650
- Volume :
- 67
- Database :
- OpenAIRE
- Journal :
- Marine and Freshwater Research
- Accession number :
- edsair.doi...........dfbd35f3e0ae9ffc263e08a2ff2ad8d6