Aggregational Behavior in a Freshwater Sculpin

Copeia ◽  
1957 ◽  
Vol 1957 (2) ◽  
pp. 157 ◽  
Author(s):  
John Greenbank
Keyword(s):  
Freshwater Sculpin

Systematic Status of a Midwater Population of Freshwater Sculpin (Cottus) from Lake Washington, Seattle, Washington

1975 ◽  
Vol 32 (1) ◽  
pp. 21-28 ◽  
Author(s):  
K. W. Larson ◽  
G. W. Brown Jr.
Keyword(s):  
Reproductive Isolation ◽  
Canal System ◽  
Systematic Status ◽  
Close Relationship ◽  
Lake Washington ◽  
Freshwater Sculpin

A population of freshwater sculpin from Lake Washington differs from other species of the typically benthic genus Cottus in that individuals migrate nightly to the surface and midwaters. Individuals are phenotypically and biochemically similar to Cottus aleuticus, but have a longer, more terete body, a larger cephalic pore and canal system, shorter pelvic fins, and a higher frequency of individuals with seven branchiostegal rays per side.A close relationship between the Lake Washington population and C. aleuticus seems indicated because of their phenotypic and biochemical similarities and because of the existence of individuals in other Northwest lakes that appear intermediate in character between C. aleuticus and the Lake Washington population. The decision as to the specific status of the Lake Washington population is deferred until more is known of its degree of reproductive isolation from C. aleuticus and of the existence of these possibly intermediate populations.

scholarly journals An invasive lineage of sculpins, Cottus sp. (Pisces, Teleostei) in the Rhine with new habitat adaptations has originated from hybridization between old phylogeographic groups

2005 ◽  
Vol 272 (1579) ◽  
pp. 2379-2387 ◽  
Author(s):  
Arne W Nolte ◽  
Jörg Freyhof ◽  
Kathryn C Stemshorn ◽  
Diethard Tautz
Keyword(s):  
River Rhine ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Cottus Gobio ◽  
Mitochondrial Haplotypes ◽  
Expansion Range ◽  
Distinct Genetic Group ◽  
Source Populations ◽  
Freshwater Sculpin ◽  
New Habitats

Fish abundance surveys in the Rhine system have shown in the past two decades that there is a rapid upriver invasion of a freshwater sculpin of the genus Cottus . These fish are found in habitats that are atypical for the known species Cottus gobio , which is confined to small cold streams within the Rhine drainage. Phylogeographic analysis based on mitochondrial haplotypes and diagnostic single nucleotide polymorphisms indicates that the invasive sculpins are hybrids between two old lineages from the River Scheldt drainage and the River Rhine drainage, although it is morphologically more similar to the Scheldt sculpins. Most importantly, however, the invasive population possesses a unique ecological potential that does not occur in either of the source populations from the Rhine or the Scheldt, which allows the colonization of new habitats that have previously been free of sculpins. Microsatellite analysis shows that the new lineage is genetically intermediate between the old lineages and that it forms a distinct genetic group across its whole expansion range. We conclude that hybridization between long separated groups has lead to the fast emergence of a new, adaptationally distinct sculpin lineage.

Late Pleistocene fish fossils of Coregonus, Stenodus, Thymallus, Catostomus, Lota, and Cottus from the Old Crow basin, northern Yukon, Canada

1981 ◽  
Vol 18 (11) ◽  
pp. 1740-1754 ◽  
Author(s):  
Stephen L. Cumbaa ◽  
Don E. McAllister ◽  
Richard E. Morlan
Keyword(s):  
North America ◽  
Geographic Variation ◽  
Glacial Refugia ◽  
Yukon Territory ◽  
The Arctic ◽  
Arctic Grayling ◽  
Thymallus Arcticus ◽  
Freshwater Sculpin ◽  
Longnose Sucker ◽  
First Time

Fossils of the broad whitefish, Coregonus nasus; the inconnu, Stenodus leucichthys; the longnose sucker, Catostomus catostomus; and the burbot, Lota lota, are reported for the first time from North America and a freshwater sculpin, Cottus, for the first time from Yukon Territory. The known fossil occurrence of the Arctic grayling, Thymallus arcticus, in North America is extended from 32 000 to about 60 000 years BP. These six fossils represent about one sixth of the present-day Yukon freshwater ichthyofauna of 35 species.These fossils provide a major test for the method of determining glacial refugia based on geographic variation of morphological or protein characters. They confirm that these taxa were present prior to and presumably survived the Wisconsinan glaciation in a Beringian refugium.The occurrence of these fossils, all subarctic or subarctic–boreal species known at present in the same area, does not suggest a paleoenvironment greatly different from the present one.

scholarly journals BACKGROUND MATCHING AND COLOR-CHANGE PLASTICITY IN COLONIZING FRESHWATER SCULPIN POPULATIONS FOLLOWING RAPID DEGLACIATION

Evolution ◽  
2009 ◽  
Vol 63 (6) ◽  
pp. 1519-1529 ◽  
Author(s):  
Andrew R. Whiteley ◽  
Scott M. Gende ◽  
Anthony J. Gharrett ◽  
David A. Tallmon
Keyword(s):  
Color Change ◽  
Background Matching ◽  
Freshwater Sculpin
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