Age, Growth and Reproduction of the Oceanic Whitetip Shark from the Pacific Ocean
نویسندگان
چکیده
We studied age, growth, and maturity of the oceanic whitetip shark Carcharhinus longimanus in the North Pacific, and the reproduction in the North and South Pacific, captured with tuna longline from Nov. 1967 to Oct. 1995. Vertebral rings were examined from 111 males (precaudal length: 54-172 cm) and 114 females (precaudal length: 50-195 cm). Minimum and maximum numbers of translucent rings were 0 and 11. Marginal increment analysis suggested annualus deposition occurs during spring. A growth difference between sexes was not found. A von Bertalanffy growth equation combining both sexes was as follows;
منابع مشابه
Busan, Republic of Korea Catch per Unit Effort of Oceanic Whitetip Sharks in the Western and Central Pacific Ocean Wcpfc‐sc8‐2012/sa‐ip‐10 Catch per Unit Effort of Oceanic Whitetip Sharks in the Western and Central Pacific Ocean
This paper follows from the indicator based analysis presented to the Western and Central Pacific Fisheries Commission (WCPFC) Scientific Committee (SC7, Clarke et al. 2011). Following a brief summary of exploratory data analysis, this report presents a Catch Per Unit Effort (CPUE) standardization for oceanic whitetip shark (Carcharhinus longimanus) taken in longline and purse seine fisheries b...
متن کاملPopulation trends in Pacific Oceanic sharks and the utility of regulations on shark finning.
Accurate assessment of shark population status is essential for conservation but is often constrained by limited and unreliable data. To provide a basis for improved management of shark resources, we analyzed a long-term record of species-specific catches, sizes, and sexes of sharks collected by onboard observers in the western and central Pacific Ocean from 1995 to 2010. Using generalized line...
متن کاملSCIENTIFIC COMMITTEE SEVENTH REGULAR SESSION 9-17 August 2011 Pohnpei, Federated States of Micronesia Analyses of Catch Data for Oceanic Whitetip and Silky Sharks reported by Fishery
This report presents descriptive statistical summaries and generalized linear model (GLM) analyses of catch data for oceanic whitetip shark Carcharhinus longimanus and silky shark C. falciformis in the Hawaii-based pelagic longline fishery. This paper is a collaborative effort begun at the Secretariat of the Pacific Community (SPC) in New Caledonia and completed at the NOAA Fisheries Pacific Is...
متن کاملCompilation of information on blue shark (Prionace glauca), silky shark (Carcharhinus falciformis), oceanic whitetip shark (Carcharhinus longimanus), scalloped hammerhead (Sphyrna lewini) and shortfin mako (Isurus oxyrinchus) in the Indian Ocean
At the Ninth Session of the Indian Ocean Tuna Commission in 2005, the commission adopted the resolution 05/05 , arising from the work of the Compliance Committee, concerning the conservation of sharks caught in association with fisheries managed by IOTC. It is stipulated that Contracting Parties and Cooperating non-Contracting Parties (CPCs) shall annually report their data for shark catches, r...
متن کاملDiet shift and site-fidelity of oceanic whitetip sharks Carcharhinus longimanus along the Great Bahama Bank
Identifying the driving forces behind oceanic pelagic shark movements is key to a better understanding of their life history. Some oceanic pelagic shark species have been shown to aggregate in specific regions to mate and/or exploit abundant food resources. The oceanic whitetip shark Carcharhinus longimanus, a subtropical, ectothermic, oceanic pelagic shark that has experienced severe populatio...
متن کامل