48 



COMMERCIAL FISHERIES REVIEW 



Vol. 28, No. 7 



able equipment and approved procedures for 

 taking accurate temperatures of frozen foods. 



3. No product shall be loaded in such 

 manner that it will interfere with the 

 free flow of air into or out of the re- 

 frigeration unit nor with the free flow 

 of air around the load in trailers of 

 other than envelope -type construction 

 or those using freon or liquid nitrogen 

 as a refrigerant. 



4. It is the duty of the shipper and 

 consignee, and not the motor carrier, 

 to see that no product is permitted to 

 remain on a nonrefrigerated dock long- 

 er than 20 minutes. 



5. Vehicles should be loaded and un- 

 loaded within allowable free time as 

 provided for in governing tariffs, oth- 

 erwise detention charges will apply. 



6. The refrigeration unit of the trail- 

 er must be turned on and doors of the 

 vehicle kept closed during any time 

 when loading and unloading operation 

 cease. 



7. The thermostat on the refrigeration 

 unit must be set at 0° F. or lower. 



8. Bills of lading will bear the follow- 

 ing or similar notation: "FROZEN 

 FOODS- -To be tendered and transport 

 ed at a temperature no higher than 



0° F." 



9. After loading has been completed 

 and the trailer doors closed, the car- 

 rier's equipment must be checked prior 

 to departure to make certain that the 

 refrigeration equipment is in proper 

 working order. 



Tropical Atlantic Fisheries 

 Investigations 



BIOLOGY AND ECOLOGY OF TUNA AND 

 LIVE BAIT INVESTIGATIONS: 



R/V 



"Geronimo" 



Cruise 7 (January 24- 



April 20, 1966): The northeast coast of South 

 America and the eastern Caribbean Sea were 

 the areas covered on this cruise by the re- 

 search vessel Geronimo , operated by the 



Tropical Atlantic Biological Laboratory, Bu- 

 reau of Commercial Fisheries, U. S. Depart- 

 ment of the Interior. Objectives were to: (1) 

 investigate the biology and ecology of surface 

 tunas and other pelagic predators by sampling 

 these fish by live -bait fishing and trolling, and 

 by investigating their relationships to the phys- 

 ical, chemical and biological environment, 

 and by testing the suitability of various fishes 

 as live bait; and (2) test the feasibility oftrans- 

 mitting salinity and uncorrected temperature 

 data to a shore station for processing and the 

 subsequent transmission of reduced data back 

 to the vessel; a cooperative feasibility study 

 between the Bureau of Commercial Fisheries, 

 Coast Guard, National Oceanographic Data 

 Center, Navy Anti-Submarine Warfare Envi- 

 ronmental Prediction System, and the Univer- 

 sity of Miami. 



INVESTIGATION OF THE BIOLOGY AND 

 ECOLOGY OF SURFACE TUNAS: Few fish 

 were sighted during the fishery -oceanography 

 survey from Miami to Trinidad (January 30 to 

 February 7) except for some concentrations 

 of blackfin tuna ( Thunnus atlanticus ) seen near 

 island banks. One large school of tuna was 

 observed near Anguilla Island. This school 

 was estimated to be at 30 tons consisting of 

 50-150 pound yellowfin tuna (Thunnus alba - 

 cares ), 5-10 pound skipjack tuna ( Katsuwonus 

 pelamis ), and 5-10 pound blackfin tuna. The 

 school was accompanied by a 40 -foot whale 

 shark ( Rhincodon typus) . The fish were feed- 

 ing on large concentrations of juvenile squir- 

 relfish ( Holocentrus sp.). 



Extremely rough weather was encountered 

 between Trinidad and the mouth of the Ama- 

 zon River from February 12 to March 8. 

 Thirty-knot winds from the northeast pre- 

 vailed daily and made sightings of surface 

 schools virtually impossible. One small 

 school of tuna (5 tons) was sighted. This 

 mixed school of yellowfin and skipjack occur- 

 red at 8°10' N. and 56°40' W. and was ac- 

 companied by several large baleen whales. 



On the return survey to Trinidad the en- 

 tire track was covered during daylight hours. 

 A few small, scattered schools of little tuna 

 ( Euthynnus alletteratus ) were observed in the 

 turbid, nearshore waters, particularly near 

 the mouth of the Amazon. A few schools of 

 skipjack tuna and occasional yellowfin jump- 

 ers were sighted in the clear, offshore wa- 

 ters. A 5 -ton school of skipjack and yellow- 

 fin was found at the same locality where the 

 whales and tuna were sighted 15 days earlier; 

 no whales were present at this time. 



