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Vol. 53 - Alaska Resources Library and Information Services

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Table 3.4.<br />

Relative annual abundance of female crabs greater than 89 mm carapace<br />

in the three areas of the southeastern Bering Sea. Stratum I<br />

<strong>and</strong> II are along the North Aleutian Shelf (see Fig. 3.16), <strong>and</strong><br />

Remaining Bristol Bay is delineated in Fig. 3.22 for the year 1978.<br />

Values are the mean + 1 SD ofcrabs per square mile (see the text<br />

for details on calcuTations).<br />

If a positive relationship exists between mature female abundance<br />

<strong>and</strong> larval production, it is not clear how this relates, in turn, to<br />

eventual year-class strength as measured by abundance of five-year-old<br />

juveniles (youngest prerecruits routinely sampled by NMFS; Reeves <strong>and</strong><br />

Marasco 1980) or older age-classes.<br />

Reeves <strong>and</strong> Marasco (1980) attempted<br />

to model spawner-recruit relationships with ambiguous results from both<br />

Beverton-Holt <strong>and</strong> Ricker models.<br />

The only reasonable conclusion to be<br />

drawn was that very high levels of mature females are not always correlated<br />

to high recruitment.<br />

This reasoning could be exp<strong>and</strong>ed by<br />

589

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