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Vol. 53 - Alaska Resources Library and Information Services

Vol. 53 - Alaska Resources Library and Information Services

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excess of 100,000/100 m² were found in 1982 (Armstrong,<br />

data).<br />

unpublished<br />

Mean densities calculated by stratum were highest in stratum 4<br />

(about 3000/100 m²) <strong>and</strong> less, but comparable, in strata 3, 5, 6, 8, <strong>and</strong><br />

12 (about 500-1100 m 2 ) (Fig. 5.16). The highest single density of 7025<br />

larvae/100 m 2 occurred in stratum 4.<br />

Summary<br />

1) Cancer spp. larvae were collected at 13% of all stations sampled<br />

during this study.<br />

2) Larvae were generally most abundant nearshore of Unimak Isl<strong>and</strong> <strong>and</strong><br />

west over the shelf break.<br />

3) The highest density found was over 7000/100 m 2 but means between<br />

1000-3000/100 m 2 were more typical of high abundance areas.<br />

5.3.2.5 Telemessus cheiragonus<br />

Seasonal Occurrence:<br />

These larvae were collected in the plankton from<br />

late-April to late June, a total period of 10 weeks, when data were combined<br />

from the years 1977-1981 (Fig. 5.3).<br />

Individual larval stages<br />

were present during these sampling periods as follows:<br />

SI in mid-May;<br />

SII in mid-April, mid-May, <strong>and</strong> late-June; SIII in late-May <strong>and</strong> late<br />

June; SIV in mid-May <strong>and</strong> early-June; <strong>and</strong> SV in early <strong>and</strong> mid-May.<br />

Megalops larvae were never observed in the plankton samples of this<br />

study.<br />

686

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