| a comparison of the heart and muscle total lipid and fatty acid profiles of nine large shark species from the east coast of south africa. | we have assessed the fatty acid profiles of the hearts and different muscle tissues from nine large shark species (carcharhinus limbatus (blacktip), carcharhinus obscurus (dusky), carcharhinus brevipinna (spinner), carcharhinus leucas (zambezi/bull), galeocerdo cuvier (tiger), sphyrna lewini (scalloped hammerhead), sphyrna zygaena (smooth hammerhead), carcharodon carcharias (great white) and carcharias taurus (raggedtooth/grey nurse/sand tiger)) found off the east coast of south africa. while th ... | 2011 | 20694746 |
| erection of a new onchobothriid genus (cestoda: tetraphyllidea) and the description of five new species from whaler sharks (carcharhinidae). | the onchobothriid triloculatum n. gen. is erected to house species formerly considered members of phoreiobothrium, but that bear 3, rather than 5 or more, bothridial subloculi. the species formerly known as phoreiobothrium triloculatum is designated as its type. this species is redescribed based on 2 syntypes and on voucher material consistent with type material taken from the type host, carcharhinus obscurus, from the type and 1 additional locality. examination of the cestode fauna of a diversi ... | 2009 | 20049998 |
| maternal investment and size-specific reproductive output in carcharhinid sharks. | 1. life-history theory predicts that organisms will provide an optimal level of parental investment for offspring survival balanced against the effects on their own survival and future reproductive potential. 2. optimal resource allocation models also predict an increase in reproductive output with age as expected future reproductive effort decreases. to date, maternal investment in sharks has received limited attention. 3. we found that neonatal dusky sharks (carcharhinus obscurus) are not inde ... | 2010 | 19845812 |
| population expansion and genetic structure in carcharhinus brevipinna in the southern indo-pacific. | quantifying genetic diversity and metapopulation structure provides insights into the evolutionary history of a species and helps develop appropriate management strategies. we provide the first assessment of genetic structure in spinner sharks (carcharhinus brevipinna), a large cosmopolitan carcharhinid, sampled from eastern and northern australia and south africa. | 2013 | 24086462 |
| the complete mitochondrial genome of the spinner shark carcharhinus brevipinna. | the mitochondrial genome of the spinner shark (carcharhinus brevipinna) was determined in this study. it was 16,706 bp in length with the typical genomic organization and gene order as most vertebrates. whole nucleotide base composition was 31.3% a, 25.3% c, 13.2% g and 30.1% t. among the protein-coding genes, there are three overlapping reading-frames on the same strand, while one of it on the opposite strand. two start codons (atg and gtg) and three stop codons (agg, tag and taa/t) were used i ... | 2016 | 25268999 |
| isolation and characterization of eight microsatellite loci from galeocerdo cuvier (tiger shark) and cross-amplification in carcharhinus leucas, carcharhinus brevipinna, carcharhinus plumbeus and sphyrna lewini. | the tiger shark galeocerdo cuvier (carcharhinidae) is a large elasmobranch suspected to have, as other apex predators, a keystone function in marine ecosystems and is currently considered near threatened (red list iucn). knowledge on its ecology, which is crucial to design proper conservation and management plans, is very scarce. here we describe the isolation of eight polymorphic microsatellite loci using 454 gs-flx titanium pyrosequencing of enriched dna libraries. their characteristics were t ... | 2016 | 27231661 |
| applying genetic techniques to study remote shark fisheries in northeastern madagascar. | 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. | 2011 | 21281222 |
| micro-computed tomography: an alternative method for shark ageing. | micro-computed tomography (microct) produced 3d reconstructions of shark carcharhinus brevipinna vertebrae that could be virtually sectioned along any desired plane, and upon which growth bands were readily visible. when compared to manual sectioning, it proved to be a valid and repeatable means of ageing and offers several distinct advantages over other ageing methods. | 2012 | 22497384 |
| relative abundance and size of coastal sharks derived from commercial shark longline catch and effort data. | in the north-west atlantic ocean, stock assessments conducted for some commercially harvested coastal sharks indicate declines from 64 to 80% with respect to virgin population levels. while the status of commercially important species is available, abundance trend information for other coastal shark species in the north-west atlantic ocean are unavailable. using a generalized linear modelling (glm) approach, a relative abundance index was derived from 1994 to 2009 using observer data collected i ... | 2012 | 22497406 |