Biological Oceanography

(b) Spawners vs. returning 2-year-old fish relationship for the Kodiak Archipelago, taking all streams together. ...

series will be affected by changes in the system. (^) Most spawner–recruit relationships are affected by the ...

Growth (ΔB/Δt = ... + G(B,A) ...) (^) Fish grow at different rates at different sizes (ages). The rate ...

relationships of size to age and of growth rate to age typically have the forms shown in Fig. 17.13. Th ...

Another factor is that it can be difficult to leave some of the larger individuals behind while tak ...

17.14) and thus have better survival chances. For some fish and some capture techniques, in ...

of intense fishing shifts the age structure to smaller, younger, usually less-fecund fish. Moreover, once a fi ...

for return of a very small fraction of the original tagged lot (the usual case) are unfavorable ...

(^) Usually much of the reproductive stock has been removed in fisheries that are well down the right sid ...

There is an interaction between porpoises and tuna that is still not fully understood, but the fishers learned ...

or less fishing pressure. Evaluation of the eastern Pacific yellowfin tuna fishery and its stock have become ...

Fig. 17.17 Catch per set (CPUE) vs. sets (effort in baskets of hooks) for North Pacific halibut on the “souther ...

assumes the habitat is constant, supporting the stock at the same level consistently. Virtually every stock e ...

to protect their livelihood. Thus, the complexity of the scientific terminology and issues and the ...

in many fisheries is zero. If a fishery were to be maintained by regulation near MSY, then too many ...

only a stock of fish to catch, but also a market and entrepreneurs to invest in processing. Some ...

...

(^) Similar sequences have affected sardine (Sardinops melanostictus) and anchovy (Engraulis japonicus) fis ...

sardines, and is made more evident by normalizing the catch statistics and plotting them over the same dat ...

directions long before there were any industrial fisheries. The data for that are anchovy and sar ...