Geographic variation in Megalorchestia californiana allele frequencies may be caused by winter rather than summer temperatures

2013 ◽  
Vol 488 ◽  
pp. 201-207
Author(s):  
JH McDonald
Keyword(s):  
Geographic Variation ◽  
Allele Frequencies ◽  
Summer Temperatures

Geographic variation in allele frequencies at three loci in Chlamys opercularis from Norway to the Brittany coast

1982 ◽  
Vol 62 (2) ◽  
pp. 243-261 ◽  
Author(s):  
A. R. Beaumont
Keyword(s):  
Geographic Variation ◽  
Leucine Aminopeptidase ◽  
Allele Frequencies ◽  
Irish Sea ◽  
Coastal Current ◽  
Isolated Populations ◽  
Protein Locus ◽  
The Irish Sea ◽  
Current Systems ◽  
Octopine Dehydrogenase

Geographic variation of allele frequencies at four loci in Chlamys opercularis was investigated using electrophoresis on polyacrylamide gels. Large differences were observed between populations at a protein locus, while some small but significant variations occurred at the phosphoglucomutase-2 and octopine dehydrogenase loci. The leucine aminopeptidase locus appeared monomorphic. On the basis of mean genetic identities derived from three loci in nine populations and hydrographic data on coastal current systems, it is proposed that there are at least four relatively genetically isolated populations of this scallop around the British Isles, namely (1) North and West Scottish coast, (2) the Irish Sea, (3) the Celtic Sea (Brittany coast) and (4) the English Channel. It is argued that both random genetic drift and selection may play a significant part in the establishment and retention of large allele frequency differences between isolated populations of this species.

Geographic Variation in Atlantic Cod, Gadus morhua, off Eastern North America: A Biochemical Systematics Approach

1978 ◽  
Vol 35 (1) ◽  
pp. 117-123 ◽  
Author(s):  
T. F. Cross ◽  
R. H. Payne
Keyword(s):  
North America ◽  
Geographic Variation ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Allele Frequencies ◽  
Fish Stock ◽  
Eastern North America ◽  
The North ◽  
Stock Discrimination ◽  
Significant Difference

Analysis of geographic variation in the frequencies of alleles at the Tf locus in Atlantic cod, Gadus morhua, indicates that it is possible to distinguish three major populations off eastern North America: (1) north of the Laurentian Channel, (2) south of the Laurentian Channel, and (3) Flemish Cap. The data also suggest that the north Laurentian stock may be further subdivided into a northern and southern component. The genetic distinction between the cod population on Flemish Cap and those on other areas of the continental shelf is confirmed by a significant difference in allele frequencies at the PGI-2 locus. It is suggested that the cod population on Flemish Cap may have persisted in isolation since the last glaciation. Key words: fish stock discrimination, transferrin, phosphoglucose isomerase, allele frequencies, genetic distance

scholarly journals Macro- and micro-geographic variation in pantophysin (PanI) allele frequencies in NE Atlantic cod Gadus morhua

2005 ◽  
Vol 301 ◽  
pp. 267-278 ◽  
Author(s):  
RAJ Case ◽  
WF Hutchinson ◽  
L Hauser ◽  
C Van Oosterhout ◽  
GR Carvalho
Keyword(s):  
Geographic Variation ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Allele Frequencies ◽  
Ne Atlantic

To Whistle or Not to Whistle? Geographic Variation in the Whistling Behavior of Small Odontocetes

2008 ◽  
Vol 34 (3) ◽  
pp. 288-302 ◽  
Author(s):  
Julie N. Oswald ◽  
Shannon Rankin ◽  
Jay Barlow
Keyword(s):  
Geographic Variation
Sign in / Sign up

Export Citation Format

Share Document