Vol. 53 - Alaska Resources Library and Information Services

ottom.
A pandalid larval type that was smaller and had fewer setae on
the antennal scale than the P. borealis larvae (as described by Haynes
1978) was found sporadically at scattered locations over the mid-shelf
domain in samples from 1976-1981.
While this larval type agreed with a
description of P. borealis SI larvae from Hokkaido, Japan (Kurata 1964),
it seemed significantly smaller and with different setal counts than the
majority of P. borealis larvae. At the same time, it had a larger body
size than the SI P. goniurus described by Haynes (1978) from Kachemak
Bay, Alaska.
The colder water temperatures of the Bering Sea may cause
significant size differences in larvae compared to -populations from the
Gulf of Alaska, and thus size alone cannot be used as a definitive characteristic
for the species.
Size of Bering Sea larvae were consistently
larger and had consistently different numbers of antennal setae,
maxillule spines, and maxilla setae counts than Haynes' Kachemak Bay.
Larval specimens were sent to Dr. Evan Haynes of the NMFS Auke Bay
Laboratory to confirm identifications of P. goniurus.
All P. borealis
SI larvae from 40-120 m stations were re-examined and re-assigned to P.
goniurus if they proved to be < 5.0 mm from rostrum to telson, with less
than 19 setae on the antenna, less than 9 spines on the basipodite of
the maxillule, and less than 11 setae on the scaphognathite of the
maxilla. Relatively few P. goniurus larvae were found following this
extensive review of 1976-1980 samples.
Only 2.4% of the PROBES stations
sampled in 1981, and 0% and 4.5% of the NOAA 1981 stations (two cruises)
contained P. goniurus larvae.
Figure 6.5 illustrates station locations
of P. goniurus larvae from all years combined.
720