Small-scale clinical variation, genetic diversity and environmental heterogeneity in the marine gobies Pomatoschistus minutus and P. lozanoi (Gobiidae, Teleostei)

Article Abstract:

A study is conducted to assess possible effects of natural selection on the maintenance of genetic diversity and allele frequencies within two Pomatoschistus species occurring in a gradient of environmental heterogeneity. No significant differences in levels of genetic diversity are found between estuarine, coastal and offshore samples in either species and only a temporally stable clinical gradient is observed in allele frequencies at the two-allele locus GPI-A* in P. lozanoi.

Belgium, Analysis, Gel electrophoresis

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High genetic diversity in cryptic populations of the migratory sutchi catfish Pangasianodon hypophthalmus in the Mekong river

Article Abstract:

The sutchi catfish Pangasianodon hypophthalmus is a common large-sized tropical fish which migrates annually to several upstream spawning sites on the Lower Mekong River and feeds on the huge floodplain of the Lower Mekong and Tonle Sap. The sustainable exploitation of the natural resource hinges on the conservation of the limited spawning grounds and open migration routes between the spawning and feeding grounds.

Animal aquaculture, Catfish, Catfishes, Spawning

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Evidence for fine-scale genetic structure and estuarine colonization in a potential high gene flow marine goby (Pomatoschistus minutus)

Article Abstract:

Genetics diversity and differentiation was assessed in 15 samples of the sand goby Pomatoschistus minutus from four major habitats of the North Sea. The results showed indications of a complex and dynamic spatiotemporal structure that was determined by historical events and local oceanic currents.

United States, Finfish, Salt Water Fish, Isoenzymes, Marine fishes

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