a streamlined dna tool for global identification of heavily exploited coastal shark species (genus rhizoprionodon)流线型的dna工具全球严重的识别利用沿海鲨鱼(属rhizoprionodon).pdfVIP

A Streamlined DNA Tool for Global Identification of Heavily Exploited Coastal Shark Species (Genus Rhizoprionodon) 1 2 1 3 4 Danillo Pinhal *, Mahmood S. Shivji , Pedro G. Nachtigall , Demian D. Chapman , Cesar Martins ˜ ˜ 1 Departament of Genetics, UNESP - Sao Paulo State University, Botucatu, Sao Paulo, Brazil, 2 Save Our Seas Shark Center and Guy Harvey Research Institute, Oceanographic Center, Nova Southeastern University, Dania Beach, Florida, United States of America, 3 School of Marine and Atmospheric Science Institute for Ocean ˜ Conservation Science, Stony Brook University, Stony Brook, New York, United States of America, 4 Department of Morphology, UNESP - Sao Paulo State University, ˜ Botucatu, Sao Paulo, Brazil Abstract Obtaining accurate species-specific landings data is an essential step toward achieving sustainable shark fisheries. Globally distributed sharpnose sharks (genus Rhizoprionodon) exhibit life-history characteristics (rapid growth, early maturity, annual reproduction) that suggests that they could be fished in a sustainable manner assuming an investment in monitoring, assessment and careful management. However, obtaining species-specific landings data for sharpnose sharks is problematic because they are morphologically very similar to one another. Moreover, sharpnose sharks may also be confused with other small sharks (either small species or juveniles of large species) once they are processed (i.e., the head and fins are remo