Results 51 to 60 of about 2,860 (207)

Alarming biological indicators and management implications for the Critically Endangered Taiwanese wedgefish (Rhynchobatus immaculatus) in the Taiwan Strait

Global Ecology and Conservation
According to the International Union for Conservation of Nature (IUCN) Red List of Threatened Species, all but one wedgefish species are classified as Critically Endangered, underscoring the urgent need for action to prevent extinction.
Hoang Huy Huynh, Hua-Hsun Hsu, Che-Hua Hsu, Shang-Yin Vanson Liu, Jinn-Shing Weng, Wen-Pei Tsai   +5 more
doaj   +1 more source

Orthodentine‐osteodentine and osteocytic‐anosteocytic transition inferred from Silurian stem chondrichthyan dermal jawbones with ever‐white teeth overgrown by brown denticles

Developmental Dynamics, EarlyView.
Abstract Background The dentigerous jawbones of a 423‐million‐year‐old stem chondrichthyan (ischnacanthid acanthodian) carry a characteristic combination of multi‐row non‐shedding white teeth with brownish overgrowing denticles. The color distinction makes it a good model for observing the interaction between two odontode lineages, but the nature of ...
Jia‐Cih Kang, Henning Blom, Tiiu Märss, Donglei Chen   +3 more
wiley   +1 more source

Trace Element Contamination in Top Predatory Elasmobranchs From the Southern Black Sea: Implications for Ecosystem Health and Risk Assessment

Environmental Toxicology, EarlyView.
ABSTRACT Environmental pollution resulting from the rapid increase in human population, urbanization, intensive use of chemicals in agriculture, and industrial development has reached a level that threatens natural life today. Trace elements are one of the most important factors causing significant levels of pollution in the environment and are added ...
Levent Bat, Süleyman Özdemir, Zekiye Birinci Özdemir, Ayşah Öztekin   +3 more
wiley   +1 more source

Chondrichthyan systematics in Brazil depicted: historical overview, research trends and future perspectives [PDF]

Neotropical Ichthyology
Brazil comprises one of the world’s biodiversity hotspots of the chondrichthyan fauna, currently with 12 orders, 44 families, 90 genera and over 200 species of sharks, batoids, and chimaeras.
Sarah Viana, Flávia F. Petean, Karla Soares   +2 more
doaj   +1 more source

The whale shark genome reveals patterns of vertebrate gene family evolution

eLife, 2021
Chondrichthyes (cartilaginous fishes) are fundamental for understanding vertebrate evolution, yet their genomes are understudied. We report long-read sequencing of the whale shark genome to generate the best gapless chondrichthyan genome assembly yet ...
Milton Tan, Anthony K Redmond, Helen Dooley, Ryo Nozu, Keiichi Sato, Shigehiro Kuraku, Sergey Koren, Adam M Phillippy, Alistair DM Dove, Timothy Read   +9 more
doaj   +1 more source

Hox Gene Variation Drives Morphological Specialization of Humpback Grouper Cromileptes altivelis

Integrative Zoology, EarlyView.
Cromileptes altivelis exhibits a distinctive “sunken head and humpback” morphology, formed through cranial remodeling. Genetic analyses identified unique amino acid variants in Hoxa7a and Hoxa10b, with functional tests confirming their role in enhancing osteoblast activity and driving cranial remodeling.
Xiaoying Cao, Zhaowei Zhong, Lisheng Wu, Quanyin Liu, Shaoxiong Ding   +4 more
wiley   +1 more source

SkateBase, an elasmobranch genome project and collection of molecular resources for chondrichthyan fishes [v1; ref status: indexed, http://f1000r.es/445]

F1000Research, 2014
Chondrichthyan fishes are a diverse class of gnathostomes that provide a valuable perspective on fundamental characteristics shared by all jawed and limbed vertebrates.
Jennifer Wyffels, Benjamin L. King, James Vincent, Chuming Chen, Cathy H. Wu, Shawn W. Polson   +5 more
doaj   +1 more source

Integrating migratory connectivity data into the conservation of Australian sharks and rays

Conservation Biology, EarlyView.
Abstract Understanding migratory connectivity is important for conserving highly mobile marine species facing escalating threats. Establishing baseline information on migratory connectivity is necessary for identifying species and regions requiring transboundary cooperation for their conservation.
Diego F. Bezerra, Lily K. Bentley, Ross G. Dwyer, Dina Nisthar, Anthony J. Richardson, Colin A. Simpfendorfer, Michelle R. Heupel, Christoph A. Rohner, Simon J. Pierce, Daniel C. Dunn   +9 more
wiley   +1 more source

Residency and Space Use of Endangered Smoothhound Sharks (Mustelus mustelus) in Relation to Marine Protection and Demersal Longline Fishing Along South Africa's South Coast

Fisheries Management and Ecology, EarlyView.
ABSTRACT Shark populations are declining globally and the effectiveness of marine protected areas (MPAs) as a conservation tool may vary by species and environmental context. This study assessed space use and residency of smoothhound sharks (Mustelus mustelus)—an endangered, yet highly exploited shark—in relation to spatial protection and fishing risk ...
Eugin Bornman, Taryn S. Murray, Neil Hammerschlag, Enrico Gennari   +3 more
wiley   +1 more source

A mitochondrial genome assembly of the opal chimaera, Chimaera opalescens Luchetti, Iglésias et Sellos 2011, using PacBio HiFi long reads

Mitochondrial DNA. Part B. Resources, 2022
Chondrichthyans (sharks, rays and chimeras) are a fascinating and highly vulnerable group of early branching gnathostomes. However, they remain comparatively poorly sampled from the point of view of molecular resources, with deep water taxa being ...
Nair Vilas-Arrondo, André Gomes-dos-Santos, Montse Pérez, Francisco Baldó, Ana Veríssimo, Diana Catarino, André M. Machado, Esther Román-Marcote, Rafael Bañón, Elsa Froufe, L. Filipe C. Castro   +10 more
doaj   +1 more source