Country Species Summary

Alosa alosa (Linnaeus, 1758)
Family:	Clupeidae (Herrings, shads, sardines, menhadens)	picture (Alalo_u0.jpg) by Meyer, T.
Order:	Clupeiformes (herrings)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	Allis shad
Max. size:	83.0 cm TL (male/unsexed; Ref. 7047); max. published weight: 4,000 g (Ref. 30578); max. reported age: 10 years
Environment:	pelagic-neritic; anadromous ; depth range - 5 m
Climate:	temperate; 61°N - 20°N
Global Importance:	fisheries: minor commercial
Resilience:	Medium, minimum population doubling time 1.4 - 4.4 years (K=0.19-0.29; tm=3.5; tmax=10)
Distribution:	Eastern Atlantic: from Bergen (Norway) along the coasts of Europe to northern Mauritania in Africa (Ref. 188, Ref. 51442). Also in western part of Mediterranean Sea (Ref. 188). Reported from the western part of the Baltic Sea up to the Kaliningrad Oblast (Ref. 12801, 26334). Appendix III of the Bern Convention (protected fauna).
Diagnosis:	Dorsal spines (total): 4-6; Dorsal soft rays (total): 13-18; Anal spines: 3-4; Anal soft rays: 18-24; Vertebrae: 57-58. Body somewhat compressed, fairly deep with depth at pectoral fin more than head length (Ref. 188, Ref. 51442). Upper jaw notched, lower jaw fitting into it (Ref. 188). Gill rakers long, thin and numerous, total 85 to 130, longer than gill filaments (Ref. 188). Large, thin scales (Ref. 51442). Presence of abdominal scutes (Ref. 51442). A dark spot posterior to gill opening (sometimes absent; occasionally 1 or 2 more spots) (Ref. 188).
Biology:	Amphihaline species, spending most of its life in sea (Ref. 51442). Schooling and strongly migratory species, penetrating far up rivers, but not into small tributaries (Ref. 188). Enters rivers to spawn in May, usually at night and where the current is swift (Ref. 188). Migrating adults do not feed (Ref. 30578). Adults return to sea after spawning while the juveniles move down to the sea in autumn (Ref. 188). Feeds on a wide range of planktonic crustaceans; larger adults feed on small schooling fishes (Ref. 188, Ref. 51442). Less common than Alosa fallax but both have suffered from pollution and weirs or other obstructions (Ref. 188). Marketed fresh and frozen; eaten sautéed, broiled, fried and baked (Ref. 9988)
Threatened:	, (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Whitehead, P.J.P.. 1985. (Ref. 188)
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Mauritania country information
Common names:	[ No common name ]	Ref:
Status:	native	Ref:
Salinity:	freshwater, brackish, marine
Importance:	commercial	Ref: Mohamed Fall, K.O., 2005
Uses:	no uses
Country Information:	www.cia.gov/cia/publications/factbook/geos/mr.html
Occurrences:	Occurrences Point map
Main Ref:	Whitehead, P.J.P., 1985
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Checked: Mohamed Fall, K.O.

Modified: Torres, Armi G.

Entered: Carpenter, Kent E.

CGNET - US

Page created by: Eli, 20.10.03, last modified by Eli, 26.06.07

	Ref.:		Glossary
		(e.g. 9948)		(e.g. cephalopods)
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