date:Jan 17, 2013
of aquatic and fishery sciences. One is that it depends primarily on abundance. The other is that productivity of a stock mostly depends on whether theres a period of good conditions or a period of bad conditions.
Roughly 39 percent of the assessed stocks, the study found, were strongly influenced by periods of high and low environmental regimes, while 30 percent showed a weak relationship between productivity and abundance, mixed in with irregular regime shifts. The remaining 13 percent, the r