Results 51 to 60 of about 1,233 (179)
Marine Parasite Biogeography Mirrors Host Patterns Across Latitude, Area, and Diversity
New Zealand Journal of Zoology, Volume 53, Issue 2, June 2026.Parasites are integral components of biodiversity, yet they remain poorly represented in large‐scale biogeographic theory. In this study, we test whether marine parasites follow three macroecological patterns established for free‐living taxa, namely that parasite species richness: (1) scales positively with area (both host body size and geographic area)
Thomas C. Morris +2 more
wiley +1 more source
A new euselachian shark from the early Permian of the Middle Urals, Russia [PDF]
Acta Palaeontologica Polonica, 2017 The isolated teeth of a new euselachian shark Artiodus prominens Ivanov and Duffin gen. et sp. nov. have been found in the Artinskian Stage (Early Permian) of Krasnoufimskie Klyuchiki quarry (Sverdlovsk Region, Middle Urals, Russia).
Alexander O. Ivanov +2 more
doaj +1 more source
Fisheries Management and Ecology, Volume 33, Issue 3, Page 612-629, June 2026.ABSTRACT Shore‐based observers are increasingly being used in place of at‐sea observers to monitor and sample commercial fisheries catch. However, few evaluations assess whether these programs meet their stated goals or how to optimize them, and industry data are rarely tested for accuracy despite serving as the foundation for catch accounting. Using a
Christian Gredzens +2 more
wiley +1 more source
Revista Mexicana de Biodiversidad, 2011 Como parte de un estudio sobre los helmintos parásitos de rayas (Elasmobranchii), se colectaron 12 ejemplares en 3 localidades del estado de Veracruz, México: Laguna de Tamiahua, Laguna de Tampamachoco y un arrecife de la costa del golfo de México.
Erick Rodríguez-Ibarra +2 more
doaj +1 more source
Journal of Fish Biology, Volume 108, Issue 6, Page 2053-2068, June 2026.Abstract Ginglymostoma cirratum, commonly known as the nurse shark, is a nocturnally active benthic shark, often found in western and eastern Atlantic waters. Although this shark has been well explored in many biological aspects, few studies have thoroughly examined the morphology of its dermal denticles (or placoid scales).
Danilo P. Lima +7 more
wiley +1 more source
Myocardial trabeculation in embryos of Scyliorhinus canicula (Elasmobranchii, Chondrichthyans)
The FASEB Journal, 2018 Currently, three types of ventricular myoarchitecture are recognized in vertebrates, namely compact, spongy (trabeculated) and mixed myocardium. Mixed myocardium, which has been recently proposed as the primitive condition in gnathostomes, is composed of two myocardial layers: an inner trabeculated and an outer compact one.
López-Unzu, Miguel A. +4 more
openaire +2 more sources
Coastal rocky reef fishes of Santa Catarina's northern islands, Brazil
Frontiers in Marine Science, 2015 The coast of the state of Santa Catarina only has non-biogenic reefs, i.e. rocky and artificial reefs, and is considered the geographic south limit for many reef fish species.
Johnatas Adelir Alves +4 more
doaj +1 more source
Evolutionary Stability of the Shark Snout: Geometric Morphometrics of Ventral Facial Openings
Annals of the New York Academy of Sciences, Volume 1560, Issue 1, June 2026.Landmark‐based geometric morphometrics of 453 shark species reveal that ventral head morphology is conserved across Selachii. Morphospace and ancestral reconstructions support strong phylogenetic control and limited divergence from ancestral conditions.
Stefano Aicardi +8 more
wiley +1 more source
Shark teeth from Pirabas Formation (Lower Miocene), northeastern Amazonia, Brazil [PDF]
Boletim do Museu Paraense Emílio Goeldi. Ciências Naturais, 2009 The shark fauna (Chondrichthyes: Elasmobranchii) of Pirabas Formation is one of the most representative and diversified of the Neogene of South America.
Sue Anne Regina Ferreira Costa +3 more
doaj
Reconstructing Early Human Subsistence in Near Oceania: New Insights From Matenkupkum and Matenbek
International Journal of Osteoarchaeology, Volume 36, Issue 3, Page 599-614, May/June 2026.ABSTRACT The colonization of New Ireland ~44–40,000 years ago represents the earliest evidence of human occupation in Near Oceania. Yet, the precise impacts of climatic changes on subsistence strategies during the Late Pleistocene, Last Glacial Maximum, and Holocene remain poorly understood.
Joëlle den Toom +3 more
wiley +1 more source