Young, P. H.

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Aquatic Commons

Vessel: 
Dates: 
Locality: 
Purpose: 
Results: 
California Department of Fish and Game 
Marine Resources Operations 
California State Fisheries Laboratory 
Terminal Island, California 
Cruise Report 62-S-2 Californi.a HalibutaD 
Prepared by P.R. Young, Biologist-in-Charge 
N.B. SCOFIELD 
Departed from San Pedro 26 February, 1962. 
Returned to San Pedro 22 March, 1962. 
Mainland coast from Seal Beach (Los Angeles County) to Naples (Santa 
Barbara County). Principal effort off Ventura in 11 to 15 fathoms. 
To secure a sample of California halibut stratified by sex and length 
for determining age-weight-length relationships. 
To determine the temperature profile on the trawling grounds. 
To secure a collection and/or a record of the fish, molluscs and 
crustaceans found in association wifu halibut. 
A very satisfactory sample of California halibut was secured by trawl-
ing. The nets were an eastern-type not specifically adapted for hal-
ibut. An estimated 1,000 halibut were caught 0 The otoliths and one 
of t4e pre-opercular bones were removed from about 500 of these fish. 
Male halibut predominated in the catch of fish up to 20 inches. Males 
and females were in equal numbers between 20 and 22~ inches, but fe-
males outnumbered males in the larger sizes: as much as 21 to 1 for 
fish longer than 35 inches. 
Temperature profiles taken with a bathythermograph at the beginning 
of each trawl, showed that readings were about the same from top to 
bottom. Evidence of a thermocline was almost non-existent. 
Day to day temperatures varied about 20 , ranging between 51° and 53 0 F. 
Trawls varied from one to three hours in duration. Fish found in as-
sociation with halibut were saved for Laboratory examination. Species 
most commonly taken were: 
hornyhead turbot Pleuronichthys vertica1is 
diamond turbot Hypsopsetta guttulata 
fantail sole Xystreurys liolepis 
white croaker Genyonemus lineatus 
barred perch Amphistichus argenteus 
midshipman Porichthys sp 0 
comb fish Zanio1epis sp. 
- 2 = 
Running tallies were maintained for species such as~ 
shovelnose guitarfish Rhinobatos productus 
Pacific angel shark Sguatina californica 
thornback Platyrhinoidis triseriata 
skates Raja sppo 
bat ray MYliobatis californicus 
dogfish Sgualus acanthias 
yellow crab Cancer anthonyi 
sheep crab Loxorhynchus_ sp 0 
moon snails Polinices 
Personne 1 ~	 R.Bo Mitche11~ Master Fisheries Vessel 
P.Ho Young, Biologist-in-charge 
JoW o Schott, Biologist 
Po Petrich, Vessel Opere Su?vro (Mare 20) 
We McGuire, Fish and Game Warden (Mare 12) 
ToRo Meagher, Fish and Game Warden (Mara 12) 


Cruise Report 62-S-2 - California Halibut

http://aquaticcommons.org/2508/1/CR_62-S-2.pdf

Cruise Report 62-S-2 - California Halibut

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