The European eel is a highly migratory fish. After the reproduction in the Sargasso Sea early larval-stages start a passive ocean migration towards European and Mediterranean continental waters. After several years as yellow eels, mature adults change to silver stage and then start their return trip. The trajectory of their backward migration is unknown, because of low probability of capturing ...

A critical step in ecological speciation is the development of reproductive isolation. The processes leading up to reproductive isolation are difficult to study since they often occur over very long time periods. Populations of European whitefish (Coregonus lavaretus) has gone through reticulate divergent evolution in many Scandinavian lakes during the last 10 000 years. Some populations even e...

Hucho taimen (Pall.) is one of the largest salmonid species, and has been classified as an endangered species in China since 1998. In recent years, its wild stocks, habitats, and spawning grounds have been severely damaged by environmental degradation and human intervention. To protect and exploit this treasured species effectively and sustainably, the genetic diversity and structure of taimen ...

Whitefish (Coregonus spp.) are an important catch for many freshwater fisheries, particularly in Switzerland. In support of this, supplemental stocking of whitefish species is carried out, despite lacking complete knowledge of the extent, distribution and origin of whitefish diversity in these lakes, potentially threatening local endemics via artificial gene flow. Here, we investigate phenotypi...

A total of 4959 sea bass was tagged between 2000 and 2005 around the coasts of England, Wales, southern Ireland, and the Channel Isles to investigate whether movement patterns documented in 1987 have changed and to estimate the level of competition for sea bass between inshore and offshore fisheries. Most (54%) of the recaptures of adult bass (fish .40 cm) tagged inshore and made between May an...

Issue 1: MPA benefits to fisheries It is crucial to avoid ‘overselling’ MPAs on the basis that increased catches due to spillover and enhanced recruitment from spawning in the MPA will more than make up for lost fishing grounds, increased effort and higher costs of fishers displaced from the MPA. To date, this assumption has never been proven; and spillover is generally measured as movement of ...

The first principle guiding our understanding of how migration affects population dynamics is philopatry. Harden Jones (1968) codified philopatry as the migration triangle, a series of seasonal and ontogenetic migrations arranged to guarantee homing and reproduction at localized spawning grounds. The concept of philopatry has supported the assumption of closed populations and allowed important ...