Three Odontaspis ferox (confirmed by mtDNA barcoding) were found in the English Channel and Celtic Sea in 2023 at Lepe, UK (50.7846, -1.3508), Kilmore Quay, Ireland (52.1714, -6.5937), and Lyme Bay, UK (50.6448, -2.9302). These are the first records of O. ferox in either country, and extend the species' range by over three degrees of latitude, to >52° N. They were ~275 (female), 433 (female), and 293 cm (male) total length, respectively. These continue a series of new records, possibly indicative of a climate change-induced shift in the species' range.
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http://dx.doi.org/10.1111/jfb.15529 | DOI Listing |
Biol Lett
November 2023
Discipline of Zoology, School of Natural Sciences, Trinity College Dublin, Dublin 2, Ireland.
The order Lamniformes contains charismatic species such as the white shark and extinct megatooth shark , and is of particular interest given their influence on marine ecosystems, and because some members exhibit regional endothermy. However, there remains significant debate surrounding the prevalence and evolutionary origin of regional endothermy in the order, and therefore the development of phenomena such as gigantism and filter-feeding in sharks generally. Here we show a basal lamniform shark, the smalltooth sand tiger shark , has centralized skeletal red muscle and a thick compact-walled ventricle; anatomical features generally consistent with regionally endothermy.
View Article and Find Full Text PDFJ Fish Biol
December 2023
Discipline of Zoology, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland.
Three Odontaspis ferox (confirmed by mtDNA barcoding) were found in the English Channel and Celtic Sea in 2023 at Lepe, UK (50.7846, -1.3508), Kilmore Quay, Ireland (52.
View Article and Find Full Text PDFBiology (Basel)
July 2023
Department of Palaeontology, University of Vienna, Josef-Holaubek-Platz 2 (UZA II), 1090 Vienna, Austria.
Almost half of all chondrichthyan species in the Mediterranean Sea are threatened with extinction, according to the IUCN Red List. Due to a substantial lack of access to data on chondrichthyan catches in the Mediterranean Sea, especially of threatened species, the implementation of conservation measures is extremely insufficient. This also concerns the Adriatic Sea.
View Article and Find Full Text PDFMitochondrial DNA B Resour
September 2020
Department of Biology, Conservation Biology Research Group, University of Malta, Msida, Malta.
Here, we report the first complete mitochondrial genome for the smalltooth sand tiger shark, (Risso, 1810). The circular mitochondrial genome was found to be 16,682 bp in length and contains 37 genes, a control region and the replication origin of the L-strand (O). The base composition of this mitogenome is 32.
View Article and Find Full Text PDFMar Genomics
December 2017
Conservation Biology Research Group, Department of Biology, University of Malta, Msida MSD2080, Malta.
The mitochondrial genome, through the application of DNA barcoding, provides a powerful tool for identifying species even when specimens are either incomplete or belong to species that exhibit cryptic diversity. In fisheries management accurate identification of whole or part of the specimens landed is a fundamental requirement for the conservation of species affected directly or indirectly by the fisheries activities. In this study cytochrome c oxidase subunit I (COI) and NADH dehydrogenase subunit 2 (ND2) sequences were used to genetically distinguish 36 elasmobranch species collected from Maltese (Central Mediterranean) commercial fisheries landings.
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