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Cottus gobio in Estonia
Bullhead

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Cottus gobio   Linnaeus, 1758
Family:	Cottidae (Sculpins)			picture (Cogob_u1.jpg) by Zienert, S.
Order:	Scorpaeniformes  (scorpionfishes and flatheads)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	Bullhead
Max. size:	18.0 cm TL (male/unsexed; Ref. 556); max. reported age: 10 years
Environment:	demersal; potamodromous; pH range: 7 - 7.5; dH range: 10 ; depth range 2 - 2 m
Climate:	temperate; 1 - 16°C; 70°N - 40°N
Global Importance:	fisheries: of no interest; bait: occasionally
Resilience:	Medium, minimum population doubling time 1.4 - 4.4 years (tm=1-3)
Distribution:	Europe: brackish waters along coasts of Gulfs of Bothnia, Finland and Riga, and in estuaries of large rivers; freshwaters of Europe (including Italy, Greece, Ireland, mainland Denmark to northern Germany and northern Norway, Sweden and Finland) (Ref 55856). Reported from 2 catchments, Forth and Clyde, in Scotland (P. Maitland, pers. comm.).
Diagnosis:	Dorsal spines (total): 6-8; Dorsal soft rays (total): 15-18; Anal spines: 0-0; Anal soft rays: 10-13; Vertebrae: 31-34. Caudal fin with 13 to 14 rays (Ref. 40476).
Biology:	Inhabits hard bottoms (under stones) in streams, rivers and lakes, rarely in brackish coastal waters. Feeds on small bottom invertebrates, mainly insects, crustaceans. Contrary to statements in older literature, eggs and larvae of fishes are not a common foot item (Ref. 45167). Pink to yellow eggs are found in clumps attached to undersides of large stones (Ref. 41678). Fish of the year 2006 in Germany and Austria, because its presence indicates good water quality
Threatened:	, (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Freyhof, J., M. Kottelat and A. Nolte. 2005. (Ref. 55856)
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Estonia country information
Common names:	võldas, Sculpin		Ref:  Anonymous, 1999
Status:	native		Ref:  Blanc, M., J.-L. Gaudet, P. Banarescu and J.-C. Hureau, 1971
Salinity:	freshwater, brackish, marine
Abundance:	scarce (very unlikely)		Ref:  Ojaveer, E. and E. Pihu, 2003
Regulations:	no regulations		Ref:
Uses:	no uses
Comments:	Common in the Gulf of Riga and rare in the Gulf of Finland (Ref. 52079). Also Ref. 683.
National  Checklist:	Estonian checklist - Fish
Country Information:	www.cia.gov/cia/publications/factbook/geos/en.html
Occurrences:	Occurrences    Point map
Main Ref:	Anonymous, 1999
National Database:	Estonian Vertebrates
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Internet sources:	BiOSC Point Data | CISTI | Google | GOBASE | GenBank ( genome, nucleotide ) | National databases | PubMed | Scirus | Public aquariums | Tree of Life | Zoological Record Other web sites |
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	Modified:  Ortañez, Auda Kareen	Entered:  Reyes, Rodolfo B.

	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