Results 51 to 60 of about 4,709 (218)
The hyoid arch and braincase anatomy of Acanthodes support chondrichthyan affinity of ‘acanthodians’
, 2015 Solving the evolutionary relationships of the acanthodians is one of the key problems in reconstructing ancestral anatomical conditions for the jawed vertebrates (gnathostomes).
Brazeau, MD, de Winter, V
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Cutting blade dentitions in squaliform sharks form by modification of inherited alternate tooth ordering patterns [PDF]
, 2016 The squaliform sharks represent one of the most speciose shark clades. Many adult squaliforms have blade-like teeth, either on both jaws or restricted to the lower jaw, forming a continuous, serrated blade along the jaw margin.
Johanson, Z. +2 more
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Fish Scales: A Multifunctional Biomaterial from Nature
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Fish scales demonstrate nature's solution to impact protection through overlapping multilayered architecture. This biological design combines mineralized surfaces with collagen networks to achieve both flexibility and fracture resistance. The structural principles inspire advanced protective materials and biomedical implants, where damage tolerance ...
Liyao Dong, Xiaojie Sun, Xiguang Chen
wiley +1 more source
Sharks - The State of the Science [PDF]
, 2010 The biological characteristics of sharks make them particularly vulnerable to overfishing. They grow slowly, become sexually mature relatively late and produce few offspring.
Alexia C. Morgan
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Late Triassic (Rhaetian) conodonts and ichthyoliths from Chile [PDF]
, 2000 The Late Triassic of the back arc Domeyko Basin, Chile is characterized by the onset of marine sedimentation that persisted throughout the rest of the Mesozoic.
Sansom, Ivan J.
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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 +4 more
wiley +1 more source
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 +5 more
doaj +1 more source
Extinction risk and conservation of the world\u27s sharks and rays [PDF]
, 2014 The rapid expansion of human activities threatens ocean-wide biodiversity. Numerous marine animal populations have declined, yet it remains unclear whether these trends are symptomatic of a chronic accumulation of global marine extinction risk.
Burgess, George H. +22 more
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Growth and reproduction in captivity unveils remarkable life-history plasticity in the smallnose fanskate, Sympterygia bonapartii (Chondrichthyes: Rajiformes) [PDF]
, 2018 Analizamos el crecimiento y la reproducción de ejemplares de raya marmorada, Sympterygia bonapartii nacidas en cautiverio. Se obtuvieron ovicápsulas a partir de la oviposición de dos hembras capturadas en la naturaleza y mantenidas en el Acuario Temaikèn.
Abraham, Carolina +4 more
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Conservation Science and Practice, EarlyView.This study combines literature and online data sources to expand the smalleye stingray's range, highlight ecological interactions and specific threats. Abstract Many chondrichthyan fishes are experiencing alarming population declines primarily due to overfishing, exacerbated by their inherently vulnerable life history traits including slow growth rates
Jennifer Ann Keeping +4 more
wiley +1 more source