Results 21 to 30 of about 4,709 (218)
Frontiers in Marine Science, 2023 IntroductionChondrichthyans (sharks, batoids and chimaeras) play key roles in the regulation of marine food webs dynamics. However, more than half of the assessed species in the Mediterranean are threatened, primarily by fishing pressure and compounded ...
David Ruiz-García +8 more
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State of Shark and Ray Genomics in an Era of Extinction
Frontiers in Marine Science, 2021 Chondrichthyan species (sharks, rays, skates, and chimeras) are a class of high ecological, economic, and cultural significance, and yet they are the most threatened taxa in the marine environment.
Jessica Pearce +7 more
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The Shark Basal Hypothalamus: Molecular Prosomeric Subdivisions and Evolutionary Trends
Frontiers in Neuroanatomy, 2018 The hypothalamus is a key integrative center of the vertebrate brain. To better understand its ancestral morphological organization and evolution, we previously analyzed the segmental organization of alar subdivisions in the catshark Scyliorhinus ...
Gabriel N. Santos-Durán +5 more
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Resegmentation is an ancestral feature of the gnathostome vertebral skeleton
eLife, 2020 The vertebral skeleton is a defining feature of vertebrate animals. However, the mode of vertebral segmentation varies considerably between major lineages.
Katharine E Criswell, J Andrew Gillis
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Chondrichthyan Diversity, Conservation Status, and Management Challenges in Costa Rica
Frontiers in Marine Science, 2018 Understanding key aspects of the biology and ecology of chondrichthyan fishes (sharks, rays, and chimeras), as well as the range of threats affecting their populations is crucial given the rapid rate at which some species are declining.
Mario Espinoza +9 more
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Age and growth of the highly exploited narrownose smooth-hound (Mustelus schmitti) (Pisces: Elasmobranchii) [PDF]
, 2017 The narrownose smoothhound (Mustelus schmitti) is the most exploited elasmobranch of Argentina, Brazil, and Uruguay and is considered endangered (IUCN Red List of Threatened Species).
Blasina, Gabriela Elizabeth +2 more
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An Updated Greek National Checklist of Chondrichthyans
Fishes, 2022 Accurate checklists of species are essential for evaluating their conservation status and for understanding more about their distribution, biology and ecology and, therefore, the first step in order to effectively protect them.
Ioannis Giovos +13 more
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Rare evidence of shark-on-shark trophic interactions in the fossil record [PDF]
Acta Palaeontologica Polonica, 2021 Direct evidence of chondrichthyan trophic interactions in the fossil record is largely limited to bite traces on prey items but may also be found within the gut contents of exceptionally well-preserved individuals or as inclusions within coprolites ...
VICTOR J. PEREZ +2 more
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Smart sharks: a review of chondrichthyan cognition
Animal Cognition, 2022 Abstract450 million years of evolution have given chondrichthyans (sharks, rays and allies) ample time to adapt perfectly to their respective everyday life challenges and cognitive abilities have played an important part in that process. The diversity of niches that sharks and rays occupy corresponds to matching diversity in brains and behaviour, but ...
Culum Brown, Vera Schluessel
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Diversity, 2023 The 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 ...
Eduardo Villalobos-Segura +7 more
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