In fish, adaptations to environmental variables, including chemical physical water properties such as temperature, photoperiod, ionic balance, and pollutants (Huang et al. 2004), are involved in the acceleration of the diandric-protogynic physiologic state, which makes fish valuable models for the investigation of neurologic adaptation mechanisms (Bass and Grober 2001; Larson et al. 2003).
Enhanced survival of farmed fish means less nutrients lost in the sea, better animal welfare and fish adaptation to novel environments, and more affordable protein-rich food produced.
This can be so for two major reasons: First, as with whales and fishes, adaptation to similar environments can lead to a superficial convergence of physical appearance.
In electric fish, however, adaptations have occurred, and this otherwise incidental electric current is actually utilized.
It is an example from several lines of ancient sarcopterygian fish developing adaptations to the oxygen-poor shallow-water habitats of its time, which led to the evolution of tetrapods.
In Atlantic cod Gadus morhua, perhaps the most intensively researched example of a broadcast spawning marine fish, local adaptations in life history traits have been noted amongst populations separated by relatively large distances [7].
For all the stocks combined, the most parsimonious conclusion is therefore that fishing causes adaptations in harvested populations.
Using an eco-evolutionary model, Pietro Landi and colleagues demonstrate how the interplay between adaptation of fish stocks and adaptation of fisheries policy can lead to dimorphism within populations, with some individuals reaching maturation early and others late, investing instead in growth and fecundity.
In salmonid fishes, thermal adaptation is thought to be important, especially during the egg-stage and subsequent phases following hatching.
Flow-FISH: an adaptation coupling Q-FISH incorporating flow cytometry, whereby the TL of multiple cell types can be measured and compared (Baerlocher et al. 2006).
A. These fish have evolved adaptations to a very cold environment, said Dr. Kurt Fristrup, assistant director of the Cornell University Bioacoustics Research Program, and in some extreme cases can survive in salty sea water that is colder than the freezing temperature of their internal body fluids.
