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Vol. 53 - Alaska Resources Library and Information Services

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cation of these larvae <strong>and</strong> the various larval stages are included in the<br />

text sections for each major larval group.<br />

2.5 Data Reporting<br />

The larvae of commercial decapod crustaceans are the focus of this<br />

report; they include the larval stages (zoeae <strong>and</strong> megalopae) of king<br />

crab (Paralithodes camtschatica, P. platypus), Tanner crab (Chionoecetes<br />

bairdi, C. opilio), korean horse-hair crab (Erimacrus isenbeckii), <strong>and</strong><br />

p<strong>and</strong>alid shrimp (P<strong>and</strong>alus borealis).<br />

In most cases, larvae of all other<br />

taxonomic divisions enumerated in our laboratory work are discussed in<br />

general categories as the larvae of "other anomuran crabs," "other brachyuran<br />

crabs" <strong>and</strong> "other shrimp."<br />

The pagurid crabs (Anomura: Paguridae),<br />

though of no direct commercial value, have received special attention<br />

because of the abundance <strong>and</strong> widespread distribution of their larvae in<br />

the study area.<br />

Larval abundance is reported throughout most of this text as estimated<br />

number of larvae per 100 m 2 sea surface area (number/100 m 2 ).<br />

This provides a common unit of measure by which the abundance of various<br />

larvae can be compared <strong>and</strong> summed, regardless of differences in their<br />

vertical distribution in the water column.<br />

The larvae of some taxa are<br />

more concentrated in some depth intervals than others, <strong>and</strong> this may<br />

change for the various developmental stages.<br />

Vertical distribution patterns<br />

<strong>and</strong> mean densities of larvae (numbers per 1000 m 3 ) are described<br />

for most of the major taxonomic groups.<br />

These data are used in the<br />

interpretation of potential oil impacts.<br />

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