| differences in lens optical plasticity in two gadoid fishes meeting in the arctic. | arctic and boreal/temperate species are likely to be evolutionary adapted to different light regimes. currently, the boreal/temperate atlantic cod (gadus morhua) is coexisting with the native polar cod (boreogadus saida) in the arctic waters around svalbard, norway. here, we studied light/dark adaptative optical plasticity of their eye lenses by exposing fish to bright light during the polar night. schlieren photography, high-definition laser scanning and ray tracing were used to determine the o ... | 2014 | 25240636 |
| biomagnification of polybrominated diphenyl ether and hexabromocyclododecane flame retardants in the polar bear food chain in svalbard, norway. | concentrations of brominated flame retardants (bfrs), including polybrominated diphenylethers (pbdes) and hexabromocyclododecane (hbcd), were investigated in an arctic marine food chain consisting of four invertebrate species: polar cod (boreogadus saida), ringed seals (pusa hispida), and polar bears (ursus maritimus). the most abundant bfr, brominated diphenyl ether (bde)-47, was found in detectable concentrations even in zooplankton, the lowest trophic level examined in this study. most of the ... | 2006 | 16986806 |