BIO120H1 Lecture Notes - Grand Banks Of Newfoundland, Bighorn Sheep, Inbreeding Depression
36
BIO120H1 Full Course Notes
Verified Note
36 documents
Document Summary
In the areas surrounding the grand banks, the water tends to be very shallow, creating warm and productive waters. There are in addition temperature and air gradients that move along this, and this surfaces nutrients and so-on. This is referred to as upwelling, and is the reason why these areas tend to be quite productive. Modern fishing innovations tend to be the reason why fishing has taken off, and since then cod yields exploded. In particular the invention of factory freezers have increased yields quite dramatically. Canadian law has extended gradually from 3 miles to 200 miles over its coast over concern of collapsing fisheries. The causes of the fishery collapse is a storm of bad political and economic reasons, as well as overinvestment and overcapitalization on fishing equipments. There is in addition a biological cause of the fishery collapse.
