GRANT
NUMBER:
NA76FD0101
NMFS NUMBER: 96-NER-036
REPORT
TITLE:
Using Observers to Monitor Status of Atlantic Herring
Spawning Stocks and Groundfish Bycatch in the Gulf Of
Maine
AUTHOR:
David K. Stevenson
PUBLISH
DATE:
February 17, 1999
AVAILABLE
FROM:
National Marine Fisheries Service, Northeast Region, One
Blackburn Drive, Gloucester, MA 01930. TELEPHONE:
(978) 281-9267
ABSTRACT

The first objective
of this project was to collect bycatch data and determine
what percentage of the catch made by purse seiners and
mid-water trawlers was composed of groundfish and other
species and to analyze the data for spatial and temporal
patterns. Results of the bycatch monitoring indicate
that the herring fishery is a clean one. The only
two species that showed up in the catches in significant
quantities were dogfish and mackerel. In the 50
purse seine sets and 54 trawl tows that were monitored,
groundfish accounted for 0.05% of the total trawl catch
and 0.0001% of the purse seine catch, and those percentages
reflect small amounts of whiting. It should be understood,
however, that mid-water trawlers make about 800 trips
a year, so that a sample of 27 trips only represents about
3.5% of all trips. Occasional catches of groundfish
could occur in this fishery when a net gets too close
to the bottom or when groundfish (particularly juveniles)
rise up to mid-water. It would be a mistake to conclude
from this study that there is no groundfish bycatch in
mid-water gear (or purse seines). It is clear that
whatever bycatch does occur in the herring fishery, it
is the exception rather than the rule. The second
objective of this project was to use observers to train
fishermen to collect catch and effort information and
record other observations on the distribution, size, and
spawning condition of herring harvested at sea.
A form was designed for this purpose and given to a number
of fishermen. However, no one was interested in
filling it out. There were several good reasons
why this happened. First, much of the information
requested was duplicative of information that fishermen
are required to include in their vessel trip reports,
so they couldn't understand why they should have to fill
out two forms. Second, because this was a volunteer
program, it was impossible to sustain the fishermen's
interest once the observer was off the boat. After
a couple of months, the fill-in form was abandoned for
a voluntary phone-in system. The fishermen are now
using the phone-in system to report daily catches and
fishing locations (but not haul-by-haul or set-by-set
information). Fishermen generally prefer making
a phone call to writing information down on paper.
Perhaps in the future, a phone-in system could be used
to obtain more detailed catch and effort information from
selected fishermen.