ferromagnetic body tags of appropriate sizes are suitable 

 for tagging adults and juveniles, and the tags can be 

 recovered effectively on magnets in the processing 

 plants. 



665. Larval fish survey of Humboldt Bay, Califor- 

 nia, by Maxwell B. Eldridge and Charles F. 

 Bryan. December 1972, iii + 8 pp., 8 figs., 1 table. 



Price 25 cents. 



ABSTRACT 



As part of a series of investigations of the marine re- 

 sources of Humboldt Bay, Calif., a larval fish survey was 

 conducted from January to December 1969. Bottom and 

 oblique tows were made at five sampling stations with 

 1-m plankton nets on alternate biweekly intervals. Thirty- 

 seven species of larval and juvenile fishes representing 17 

 families were collected. In terms of larval abundance, the 

 dominant fish was the bay goby. Lepidogobius lepidus, 

 followed by Pacific herring (Clupea harengus pallasi). 

 Pacific staghorn sculpin (Leptocottus armalus), longfin 

 smelt (Spirinchus thaleichthys), and the arrow goby 

 (Clevelandia ios). These five species constituted 95% of 

 all larvae captured. 



The number of larvae captured increased with increas- 

 ing distance from the mouth of the Bay. The lowest 

 number of species captured was at a station which ex- 

 perienced the widest range of salinities and tempera- 

 tures. Peaks of seasonal abundance occurred in January 

 and February and in April and May. Relatively few fish 

 were captured after June. Some notable appearances of 

 offshore spawned fishes were found in Humboldt Bay. 



NOAA Technical Memorandum NMFS 

 (Atlantic Estuarine Fisheries Center) 



AEFC-1. Report of the National Marine Fisheries 

 Service Atlantic Estuarine Fisheries Center, 

 fiscal years 1970 and 1971,byT.R. Rice, Director 

 and Staff. June 1972, iv + 16 pp., 14 figs. 

 ABSTRACT 

 Estuarine and radioecological research conducted dur- 

 ing Fiscal Years 1970 and 1971 was concerned with 

 energy relations in ecosystems, distribution and cycling 

 of radionuclides and trace metals, and environmental 

 stress on the physiology of marine organisms. Research 

 on the status of Atlantic and Gulf menhaden resources 

 included monitoring the purse seine fishery, predicting 

 future abundance, and describing the role of menhaden 

 in the coastal environment. Other activities reported are 

 thread herring and blue crab programs and radiological 

 consulting. A list of professional staff and their scientific 

 publications is included. 



NOAA Technical Memorandum NMFS 

 (Southeast Fisheries Center) 



SEFC-1. Report of the National Marine Fisheries 

 Service Southeast Fisheries Center. Miami 

 Laboratory, fiscal years 1970 and 1971, by Ann 



Weeks and Albert C.Jones. July 1972, ii + 21 pp., 

 16 figs. 



ABSTRACT 

 The research program of the National Marine Fisheries 

 Service, Southeast Fisheries Center, Miami Laboratory 

 (U.S. Department of Commerce, National Oceanic and 

 Atmospheric Administration), Miami, FL, is described. 

 Progress in investigations of the tropical Atlantic Ocean 

 during Fiscal Years 1970 and 1971 is reviewed. 



SEFC-2. Report of the National Marine Fisheries 

 Service Southeast Fisheries Center, Pascagoula 

 Laboratory, fiscal years 1970 and 1971, by Ed- 

 ward F. Klima and Richard B. Roe. June 1972. iv 



+ 21 pp., 15 figs. 



ABSTRACT 



The National Marine Fisheries Service Southeast 

 Fisheries Center, Pascagoula Laboratory (formerly the 

 NMFS Exploratory Fishing and Gear Research Base) 

 conducted research in a wide range of activities during 

 Fiscal Years 1970 and 1971. Investigations into the appli- 

 cation of remote sensors for resource detection were 

 advanced using aerial photography, pulsed lasers, spec- 

 trophotometry, and low-light-level imagery. This program 

 received national status in September 1970 with the es- 

 tablishment of a National Marine Fisheries Service Re- 

 mote Sensing Program (now the Southeast Fisheries 

 Center, Mississippi Test Facility Engineering Laboratory) 

 at the Mississippi Test Facility, Bay St. Louis, Mississippi. 



Assessment surveys were conducted along the outer 

 Continental Shelf and upper Continental Slopes of the 

 Gulf of Mexico and Caribbean Sea where deepsea 

 prawns, crabs, and silver hake were often taken in quan- 

 tity. Benthic shelf explorations were greatly facilitated by 

 the development of a remote controlled underwater 

 fisheries assessment vehicle (RUFAS) used successfully 

 in assessing, monitoring, and predicting the calico scal- 

 lop resource off the eastern seaboard. 



A budding fishery for swordfish in the Gulf of Mexico 

 suffered an untimely death with the discovery of high 

 mercury concentration in swordfish. 



Hydroacoustical assessment of pelagic marine re- 

 sources was bolstered with the acquisition of a signal 

 processing computer-echosounder unit (SAS) which 

 prints out real-time information on the location and rela- 

 tive size of underwater targets. The system is currently 

 undergoing extensive field testing. 



New approaches were taken to sampling and harvest- 

 ing coastal pelagic fishes. Underwater lights and light 

 arrays were successfully used to attract and lead school- 

 ing fish. Artificial structures of various design and com- 

 plexity were found highly successful in attracting large 

 quantities of pelagic fishes. These applied behavior 

 studies will provide a prime component in a new concept 

 in harvesting coastal pelagic fishes, an automated har- 

 vesting platform. 



Electrical harvesting gear is being developed at Pas- 

 cagoula to increase the efficiency of available gear and to 

 provide the technology for sampling resources presently 

 impossible to harvest. An electrical shrimp trawl has 

 proven highly successful and an electrical midwater trawl 



