Here are the latest publicly available updates on cartilaginous fishes (sharks, rays, skates, and chimaeras) as of now.
Global news on cartilaginous fishes tends to focus on conservation status, population trends, and new fossil or genomic insights. Recent syntheses highlight that many cartilaginous species remain data-poor, complicating assessments under IUCN criteria, and stress the need for targeted survey work and better bycatch mitigation. This theme has appeared across several recent reviews and conservation briefs.[6][8]
New research in evolutionary biology is continuing to illuminate the ancient origins and diversification of cartilaginous fishes. Studies emphasize the long and complex evolutionary history of jawed vertebrates and how early lineages inform our understanding of vertebrate physiology and immunity. Notable reviews and fossil-focused reports underscore ongoing discoveries about early elasmobranchs and related taxa.[8][6]
In museum and paleontological contexts, recent fossil findings and re-evaluations are refining our view of cartilaginous fish evolution, including Jurassic and Paleogene records. These works often discuss how transitional forms and ancient ecological settings shaped modern lineages.[7][8]
For habitat and ecology, there is renewed attention on shark and ray population dynamics in key regions, with emphasis on data-poor species and the implications for bycatch, fisheries management, and marine protected areas. Reviews frequently call for standardized methodologies to improve cross-regional comparability of abundance and life-history data.[6]
Endocrinology and genomics perspectives point to distinctive gene repertoires in cartilaginous fishes, offering insights into their hormonal regulation and immune system evolution. Comparative genomic analyses remain a growing area, with findings suggesting conserved features alongside lineage-specific innovations.[2][3]
If you’d like, I can tighten this to specific subtopics (e.g., conservation status updates by region, or the latest fossil discoveries) and provide direct citations or summaries for each item.
Latest analysis shows that human limbs share a genetic programme with the gills of cartilaginous fishes such as sharks and skates, providing evidence to support a century-old theory on the origin of limbs that had been widely discounted.
www.eurekalert.orgWe have established a cartilaginous fish cell line [Squalus acanthias embryo cell line (SAE)], a mesenchymal stem cell line derived from the embryo of an elasmobranch, the spiny dogfish shark S. acanthias. Elasmobranchs (sharks and rays) first appeared >400 million years ago, and existing species provide useful models for comparative vertebrate cell biology, physiology, and genomics. … We now demonstrate that the Tm and secretory (Sec) mRNAs of the novel cartilaginous fish Ig isotypes, IgW and...
www.science.govCartilaginous fish are commonly recognized as key species in marine ecosystems for their fundamental ecological role as top predators. Nevertheless, effective management plans for cartilaginous fish are still missing, due to the lack of knowledge on ...
pmc.ncbi.nlm.nih.govThe Late Jurassic-Early Cretaceous (164–100 Ma) represents one of the main transitional periods in life history. Recent studies unveiled a complex scenario in which abiotic and biotic factors and drivers on regional and global scales due to the ...
pmc.ncbi.nlm.nih.govImportantly, they represent classic targets of physiological exploitation by endocrine disrupting chemicals. The NR gene repertoire in different lineages has been shaped by gene loss, duplication and mutation, denoting a dynamic evolutionary route. As the earliest diverging class of gnathostomes (jawed vertebrates), cartilaginous fishes offer an exceptional opportunity to address the early diversification of NR gene families and the evolution of the endocrine system in jawed vertebrates. … We...
researchprofiles.ku.dkMarine basins that existed in present-day Ukraine during the Eocene harboured various groups of cartilaginous and bony fishes, reptiles, aquatic birds, and marine mammals. Fish remains from Paleogene deposits of Kyiv and its vicinities were first ...
pmc.ncbi.nlm.nih.govCartilaginous fish have changed much more in the course of their evolutionary history than previously believed. Evidence for this thesis has been provided by new fossils of a ray-like shark, Protospinax annectans, which demonstrate that sharks were already highly evolved in the Late Jurassic. This is the result of a recent study by an international research group led by palaeobiologist Patrick L. Jambura from the Department of Palaeontology at the University of Vienna, which was recently...
www.eurekalert.org