Behavioral Study of Small Bigeye, Yellowfin and Skipjack Tunas Associated with Drifting Fads Using Ultrasonic Coded Transmitter in the Central Pacific Ocean
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منابع مشابه
SCIENTIFIC COMMITTEE FOURTH REGULAR SESSION 11-22 August 2008 Port Moresby, Papua New Guinea ACOUSTIC IMAGING, VISUAL OBSERVATIONS, AND OTHER INFORMATION USED FOR CLASSIFICATION OF TUNA AGGREGATIONS ASSOCIATED WITH FLOATING OBJECTS IN THE PACIFIC OCEAN WCPFC-SC4-2008/FT-IP-2
Purse seiners operating in the Pacific Ocean catch large quantities, in various proportions, of skipjack, yellowfin, and bigeye tunas associated with floating objects, in particular fish-aggregating devices (FADs). There is concern about the high fishing mortality rates on small bigeye and yellowfin tunas associated with floating objects from purse-seine fisheries, and the negative impact on su...
متن کاملSpecies-specific Vertical Habitat Utilisation by Tunas in the Tropical Wcpo Wcpfc-sc9-2013/rp-pttp-03
2 Background The Pacific Tuna Tagging Programme (PTTP) is a joint research project being implemented by the Oceanic Fisheries Programme (OFP) of the Secretariat of the Pacific Community (SPC), the PNG National Fisheries Authority (NFA) and the members and participating non‐members of the Western and Central Pacific Fisheries Commission (WCPFC). The goal of the PTTP is to improve stock assessmen...
متن کاملInter-american Tropical Tuna Commission Scientific Working Group 2 Meeting Review of Stock Assessments
AGENDA 1. Welcome, introductions, consideration of agenda 2. Review of stock assessments: a. Methods b. Species composition sampling progress c. Results i. Yellowfin ii. Skipjack iii. Bigeye iv. Bluefin (paper only) v. Blue marlin vi. Albacore (paper only) vii. Others 3. Ecosystem modeling 4. Summary and recommendations 5. Other business 6. Adjournment DOCUMENTS A1 The surface fishery for tunas...
متن کاملBehavior of target and non - target species on drifting FADs and when encircled by purse seine gear WCPFC -
Empirical and observational data were collected from 31 sets made from a tuna purse seine vessel during the International Seafood Sustainability Foundation’s (ISSF) WCPO bycatch reduction research cruise. Simultaneously, skipjack (Katsuwonis pelamis), yellowfin (Thunnus albacares), and bigeye (T. obesus) tuna and silky sharks (Carcharhinus falciformis) were implanted with pressure sensing acous...
متن کاملPRELIMINARILY RESULTS OF THE RELATIONSHIP BETWEEN CATCH RATIO OF BIGEYE TUNA (Thunnus obesus) TO TOTAL CATCH AND DEPTH OF UNDERWATER STRUCTURES OF FADS
The main target species of Japanese purse seine operated in the tropical waters of the Pacific Ocean is skipjack tuna (Katsuwonus pelamis) and yellowfin tuna (Thunnus albacares) consisted of nearly 98 % to their total catch weight and the remaining is bigeye tuna (Thunnus obesus) according to logbook. The recent study of the vertical distribution of the three species around drifting FADs (fish ...
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