Vol. 53 - Alaska Resources Library and Information Services

However, the data are not included in File Type 124, "Decapod Larvae" as
of this writing.
2.2 Sample Collection
Zooplankton samples were collected with Bongo nets on a 60 cm
(diameter) Bongo frame, a MOCNESS (Multiple Opening/Closing Nets and
Environmental Sampling System, Wiebe et al. 1976), a NORPAC net (Motoda
et al. 1957) and an MTD net (Motoda, 1969).
The mesh size on the nets
deployed with each piece of gear varied, but all were fine enough to retain
even the smallest of the decapod larvae of this region.*
During OCSEAP and NMFS cruises in 1976-1979, Bongo frames were
deployed with one 333 µm and one 505 µm mesh net attached.
The samples
analyzed in this study depended exclusively upon availability and included
collections from both mesh sizes.
Bongo nets used during the
1978 PROBES cruise were 333 µm during Leg I and 505 µ m during Legs II-IV
(the investigators resorted to the larger mesh to reduce net clogging).
A 505 µ m net was used during the 1980-1982 PROBES and NMFS cruises.
The
NORPAC and MTD nets used both 333 and 505 µ m mesh, and the MOCNESS was
equipped with 149 µ m mesh nets
Flow meters attached in front of the opening of Bongo, NORPAC, and
MTD nets and near the top of the MOCNESS were used to estimate the volume
of water filtered by each net.
Bongo tows were made using standard
*The smallest larvae were stage I zoeae (SI) of the Brachyuran
family Pinnotheridae: minimum dimension of smallest individual
collected with 149 µ m nets was approximately 1.5 mm. The largest mesh
used was 550 µ m.
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