Study shows catching less fish means more will survive (no this is not an Onion headline)
We’re really surprised that this needed to be proven in a scientific study.
(NB: this is not strictly about salmon farming, but it is about wild salmon and science, a topic which is always related to salmon farms in B.C.)
No kidding. Catching less salmon means more will escape to spawn which means more bears can eat them and also that more will return next year.
It’s not rocket science, or in this case, rocket… biology. The less you take away of something, the more you have left. Kindergartners understand this. Did we really need a full-blown science study to understand this dynamic?
All joking aside though, the study does point out some interesting observations, including the observation that when salmon are plentiful, bears eat less of the fish they catch, leaving the carcass to rot and fertilize the forest and also feed other scavengers.
The study also pointed out that in four of six cases studied, reducing catch limits would have a net benefit for bears and fishers. In two cases, however, particularly two fisheries on the Fraser River, reducing catch limits would benefit bears but would take away $700,000 annually from fisheries.
Fisheries in B.C. are generally sustainable, but are fishers willing to reduce their catch to allow bear populations to grow? It’s a kind of a long-term gamble for fishers. It might increase the salmon population, and thus their catches, in the future; then again, it might not.
Posted on 2012/04/17, in News and tagged mathematics, salmon, science, sustainability, wild. Bookmark the permalink. 1 Comment.



Now if we could just get some recognition that building a gigantic reinforced-concrete barrier across a waterway prevents a good deal of the spawning, perhaps we could expect authorities to make the connection. I might be asking too much…;-)