Haugen, Charles

English

Aquatic Commons

State of Cal ifornia - The Resources Agency
Department of Fish and Game
Marine Resources Region
Long Beach, California
CRUISE REPORT 74-KB-19 LOBSTER INVESTIGI\TIONS
Prepared by Charles Haugen
Vessel:
Dates:
Locality:
. Purpose:
R/v KELP BASS
July 23 - 25, 1974
Santa Catalina Island
1, To collect California spiny lobster, Pa:I1UUY'ZI8
interruptus .. for life history st.udies.
2. To evaluate escape ports in commercial traps.
Procedure: Trapp~_ng for lobster ,vas conduct.ed in areas of
suitable habitat in the vicinity of Isthmus Cove
utilizing both conunereial traps (2x4-inch mesh)
and small-mesh (lxl inch and 12:2 i.n-::h) traps.
Several of the conun0rcial traps \\Te':,~e fitted "ith
two escape ports and several with four measuring
6.0x20.3 cm (2 3/8x8 inches). All lobsters caught
were measured, sexed, and releas€d.
Results: THO nights of trapping totaling 106 tr.ap pulls re-
sulterl in a catch of 648 lobsters of "hich 348 ,olere
of legal size (53.7%). Females comf:r1scd 50. 8~{ of
the catch and of these, 17.0% ""ere ovigerous.
Recaptures of marked lobsters accounted for 34.6%
of the catch. For the first time in our study,
marked lobsters were recaptured after mo1tir.g.
Twenty-four of the recaptured lobsters, only one of
which was female, had molted and grown. App;:;.rent
grO\('th xcmged from 0.8 nun to 7.9 mm (0.03-0.31 inr..hcs)
and averaged 4.6 mm (0.18 inchES).
Traps fitted with tHO escape ports caught an aver.age
of 1. 55 short and 3.55 legal lobsters per pull.
Those fitted with four escape ports averaged 0.22
short and 4.00 legal lobsters.
Personnel: 11. Mazarovich, V€.sse1 Captain
R. Bel.I, Biologist
C. Haugen, Biologist
J. Engle, Biologist, U.S.C.
OF.B ILB/lSO
8·-19- 74 1m,]


Cruise Report 74-KB-19: Lobster Investigations

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Cruise Report 74-KB-19: Lobster Investigations

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