Data Needs and Expected Benefits
Fishery dependent data -- such as length distributions,
sex ratios, maturity schedules and species composition of landed catches
-- are necessary for stock assessments. These data are currently
collected by state port biologists using a sampling design that randomly
selects samples from a small percentage of a very large target population.
For example, in 1997 ODF&W Port Biologists sampled 3.17% of landed
yellowtail rockfish. There are two potential shortcomings with current
sampling that will be addressed in the study. First, samples are
only collected from a small portion of the population. Increasing
sampling size will improve the precision of the estimates of fishing dependent
data, provided the sampling is done properly. Second, samples are
rarely collected from boats that come into port during the evenings and
on the weekends -- thus a substantial number of catches do not get sampled
and bias in the estimate is a potential problem. To examine the precision
and accuracy of fishery dependent data from the current port sampling,
we need to increase the sample size and expand data collection times into
the evenings and weekends. This must also be accomplished in an economically
reasonable manner -- not an insignificant challenge. Working cooperatively
with the seafood processing plants is essential to meet these challenges.
Methods
The FIRST project is a cooperative study utilizing
seafood processing plant workers to collect fishery data. The seafood
processing plant workers will be trained by the project coordinator to
randomly sample fish and measure their lengths. The FIRST project
will be conducted in three Oregon ports: Coos Bay, Newport and Astoria.
Coos Bay and Astoria will have 2 plants participating in the project and
Newport will have one. Plant workers will measure fish lengths of
specific species. Data collected by the plant workers will be compared
to data collected by ODF&W Port Biologist during their usual monitoring.
The FIRST Project coordinator will also collect length samples to augment
ODF&W samples and to ensure overall quality.