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Awaous commersoni in Comoros
River goby

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Awaous commersoni   (Schneider, 1801)
Family:	Gobiidae (Gobies) , subfamily: Gobionellinae			picture () by ( not available )
Order:	Perciformes  (perch-likes)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	River goby
Max. size:	25.0 cm SL (male/unsexed; Ref. 57749)
Environment:	benthopelagic; amphidromous
Climate:	tropical
Global Importance:	fisheries:
Resilience:	Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)
Distribution:	Africa: Mauritius, Reunion and Comoros. Species known only by the description of Commerson. Tentatively placed in the genus Gobius, a catch-all genus.
Diagnosis:	Dorsal spines (total): 7-7; Dorsal soft rays (total): 10-11; Anal spines: 1-1; Anal soft rays: 9-10. Large head. Fusiform body. Large and terminal mouth. Two dorsal fins. First with 6 spines, second with 1 spine and 10 to 11 branched rays. Adults body and fins usually grey to black with a clearer belly. Juveniles brown with a serie of darker rounded marks along the flanks. First dorsal usually shows a black mark in its posterior part, especially for young specimens. Fading while fish age. 10 to 25cm (Ref. 57749).
Biology:	A. commersoni occurs in freshwaters and sometimes brackish waters in slow to fast current waters to the base of the first falls. Usually occurs in clear waters with sand, gravel or rock bottom. Feeds on algi, detritus, worms, gasteropods and crustaceans. Close biology to A. guamensis. Amphidromous species. Adults migrate to the mouth of the rivers for reproduction. Females spawn on the rocks' surface where the males fecund the eggs. Males protect the eggs until they hatch (incubation lasts 24 to 70hrs). Larvae, translucid, are then carried into estuaries or sea. They come back after they spent 150 to 165 days in seawaters (Ref. 57749). Also Ref. 4343
Threatened:	Not Evaluated, see IUCN Red List  , (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Keith, P., G. Marquet, P. Valade, P. Bosc and E. Vigneux. 2006. (Ref. 57749)
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Comoros country information
Common names:	Loche, Cabot, Loche		Ref:  Keith, P., G. Marquet, P. Valade, P. Bosc and E. Vigneux, 2006
Status:	native		Ref:
Salinity:	freshwater, brackish
Aquaculture:			Ref:
Uses:	live export:
Country Information:	www.cia.gov/cia/publications/factbook/geos/cn.html
Occurrences:	Occurrences    Point map
Main Ref:	Keith, P., G. Marquet, P. Valade, P. Bosc and E. Vigneux, 2006
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More information:	Countries FAO areas Occurrences Introductions Ecosystem Ecology Diet Food items Food consumption Ration Predators Ciguatera Fish loss Common names Synonyms Pictures Sounds Reproduction Maturity Spawning Eggs Egg dev. Larvae Larval dynamics References Growth L-W relationship L-L relationship Length frequencies Recruitment Max. age & size Metabolism Morphology Morphometrics Gill area Brains Vision Collaborators Genetics Allele frequencies Heritability Strains Aquaculture Aquaculture profile Diseases Ecotoxicology Processing Speed Swim. type Stamps
	Note: No data are available if label is black .
Tools:	Biogeographic modelling | E-book | Field guide | Length-frequency Wizard | Life-history tool |
Internet sources:	BiOSC Point Data | CISTI | Google | GOBASE | GenBank ( genome, nucleotide ) | PubMed | Recipes | Scirus | Tree of Life | Zoological Record
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	Entered:  Busson, Frédéric

	Ref.:				Glossary
		(e.g. 9948)				(e.g. cephalopods)
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Page created by: Eli, 20.10.03, last modified by Eli, 26.06.07