Vulnerability of Fraser River sockeye salmon to climate change: a life cycle perspective using expert judgments.

Fraser River sockeye salmon have been the basis for a major commercial fishery shared by Canada and the United States, and an important cultural foundation for many aboriginal groups; they are also of huge ecological significance throughout the Fraser Basin. The potential for altered aquatic habitat and temperature regimes due to climate change is an important concern for Fraser River sockeye salmon. This paper characterizes the vulnerability of Fraser River sockeye salmon to future climate change using an approach that is novel on three counts.

From 'public service' to artificial insemination: animal breeding science and reproductive research in early twentieth-century Britain.

Artificial insemination (AI) was the first conceptive technology to be widely used in agriculture. Whereas at the beginning of the twentieth century all cows in England and Wales were mated to bulls, by the end of the 1950s 60% conceived through artificial insemination. By then a national network of 'cattle breeding centres' brought AI within the reach of every farmer.