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| http://dx.doi.org/10.33588/rn.7708.2023209 | DOI Listing |
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Metabolic skinflint or spendthrift? Insights into ground sloth integument and thermophysiology revealed by biophysical modeling and clumped isotope paleothermometry.
J Mamm Evol
January 2025
Department of Chemical and Biological Sciences, Youngstown State University, Youngstown, OH USA.
Unlabelled: Remains of megatheres have been known since the 18th -century and were among the first megafaunal vertebrates to be studied. While several examples of preserved integument show a thick coverage of fur for smaller ground sloths living in cold climates such as and , comparatively very little is known about megathere skin. Assuming a typical placental mammal metabolism, it was previously hypothesized that megatheres would have had little-to-no fur as they achieved giant body sizes.
View Article and Find Full Text PDFRays in the Shadows: Batoid Diversity, Occurrence, and Conservation Status in Fiji.
Biology (Basel)
January 2024
Marine Ecology Consulting, Lami, Fiji.
Over recent decades, elasmobranchs (sharks, rays, and skates) have been increasingly recognized among the world's most threatened marine wildlife, leading to heightened scientific attention. However, batoids (rays and skates) are relatively understudied, especially in Large Ocean States of the Pacific. This synthesis compiles insights on batoid diversity and occurrence in Fiji's waters by integrating a literature review, participatory science programs such as the Great Fiji Shark Count (GFSC) Initiative, Projects Abroad Fiji (PA), Manta Project Fiji (MPF), and iNaturalist, along with environmental DNA.
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UNAERP, São Paulo, Brasil.
Endothermic physiology of extinct megatooth sharks.
Proc Natl Acad Sci U S A
July 2023
Department of Environmental Science and Studies, DePaul University, Chicago, IL 60614.
The evolution of the extinct megatooth shark, , and its close phylogenetic relatives remains enigmatic. A central question persists regarding the thermophysiological origins of these large predatory sharks through geologic time, including whether was ectothermic or endothermic (including regional endothermy), and whether its thermophysiology could help to explain the iconic shark's gigantism and eventual demise during the Pliocene. To address these uncertainties, we present unique geochemical evidence for thermoregulation in from both clumped isotope paleothermometry and phosphate oxygen isotopes.
View Article and Find Full Text PDFA systematic review and risk matrix of plastic litter impacts on aquatic wildlife: A case study of the Mekong and Ganges River Basins.
Sci Total Environ
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CSIRO Oceans and Atmosphere, Hobart, Tasmania, Australia.
Plastic litter is a pollutant of aquatic environments worldwide, with some of the world's highest litter densities occurring in freshwater ecosystems. Little information about the risk that plastic litter poses to aquatic wildlife is available across the world's most polluted waterways. To help assess the risk to aquatic species where empirical data is lacking, our review presents i) a risk assessment methodology for predicting plastic litter impacts on aquatic wildlife in data poor environments, ii) a case study demonstrating this risk assessment methodology for wildlife across two heavily polluted river basins in Asia, the Mekong and Ganges River Basins; and iii) a broad review summarising common trends in litter interactions and risk to freshwater fish, aquatic birds, cetaceans and raptors.
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