Negligible evidence for regional genetic population structure for two shark species Rhizoprionodon acutus (Rüppell, 1837) and Sphyrna lewini (Griffith & Smith, 1834) with contrasting biology
نویسندگان
چکیده
منابع مشابه
Age and growth of the Scalloped Hammerhead shark, Sphyrna lewini (Griffith and Smith, 1834), from the southern Brazilian coast.
Age and growth studies for the scalloped hammerhead shark, Sphyrna lewini (Griffith and Smith, 1834) caught along the southern Brazilian coast, were based on ring measurements of vertebrae sections of 115 males, 116 females and 14 unknown sexed sharks between 48 and 344 cm total length (TL). The von Bertalanffy growth models were best fit using back-calculated data. The growth parameters obtain...
متن کاملPopulation dynamics and stock assessment of milk shark, Rhizoprionodon acutus (Ruppell, 1837) along Gujarat coast of India
Stock assessment of Rhizoprionodon acutus (Ruppell, 1837) was made along with a few biological characteristics in the commercial landings during 2012-2014 from Gujarat waters of India to understand the population dynamics and stock status of the species. L∞, K and t0 estimated were 93.8 cm, 0.32 yr -1 and -1.3 yr, respectively. Total mortality rate (Z), fishing mortality rate (F) and natural mo...
متن کاملDemographic Processes Underlying Subtle Patterns of Population Structure in the Scalloped Hammerhead Shark, Sphyrna lewini
Genetic diversity (θ), effective population size (N(e)), and contemporary levels of gene flow are important parameters to estimate for species of conservation concern, such as the globally endangered scalloped hammerhead shark, Sphyrna lewini. Therefore, we have reconstructed the demographic history of S. lewini across its Eastern Pacific (EP) range by applying classical and coalescent populati...
متن کاملPopulation genetics of four heavily exploited shark species around the Arabian Peninsula
The northwestern Indian Ocean harbors a number of larger marine vertebrate taxa that warrant the investigation of genetic population structure given remarkable spatial heterogeneity in biological characteristics such as distribution, behavior, and morphology. Here, we investigate the genetic population structure of four commercially exploited shark species with different biological characterist...
متن کاملApplying genetic techniques to study remote shark fisheries in northeastern Madagascar.
BACKGROUND AND AIMS The shark fisheries of Madagascar remain largely unstudied. Remoteness makes fisheries monitoring challenging while the high value of shark fins combined with the extreme poverty in Madagascar creates intensive pressure on shark resources. MATERIALS AND METHODS We use DNA barcoding and species-specific PCR assays to characterize shark fisheries in Antongil Bay in northeast...
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ژورنال
عنوان ژورنال: Marine Biology
سال: 2011
ISSN: 0025-3162,1432-1793
DOI: 10.1007/s00227-011-1666-y