Results 11 to 20 of about 6,434 (165)

Analysis of a shark reveals ancient, Wnt-dependent, habenular asymmetries in vertebrates [PDF]

Nature Communications
The mode of evolution of left-right asymmetries in the vertebrate habenulae remains largely unknown. Using a transcriptomic approach, we show that in a cartilaginous fish, the catshark Scyliorhinus canicula, habenulae exhibit marked asymmetries, in both ...
Maxence Lanoizelet, Léo Michel, Ronan Lagadec, Hélène Mayeur, Lucile Guichard, Valentin Logeux, Dany Séverac, Kyle Martin, Christophe Klopp, Sylvain Marcellini, Héctor Castillo, Nicolas Pollet, Eva Candal, Mélanie Debiais-Thibaud, Catherine Boisvert, Bernard Billoud, Michael Schubert, Patrick Blader, Sylvie Mazan   +18 more
doaj   +2 more sources

Extensive MHC class IIβ diversity across multiple loci in the small-spotted catshark (Scyliorhinus canicula) [PDF]

Scientific Reports, 2023
The major histocompatibility complex (MHC) is a multigene family responsible for pathogen detection, and initiation of adaptive immune responses. Duplication, natural selection, recombination, and their resulting high functional genetic diversity spread ...
Arnaud Gaigher, Alessia Rota, Fabiana Neves, Antonio Muñoz-Mérida, Javier Blasco-Aróstegui, Tereza Almeida, Ana Veríssimo   +6 more
doaj   +2 more sources

Sexual dimorphisms in the dermal denticles of thelesser-spotted catshark, Scyliorhinus canicula (Linnaeus, 1758) [PDF]

, 2013
The dermal layers of several elasmobranch species have been shown to be sexually dimorphic. Generally, when this occurs the females have thicker dermal layers compared to those of males. This sexual dimorphism has been suggested to occur as a response to
Adrian C Love, Colin P Waring, Lucy Babey, Neil Crooks, William J Haddon   +4 more
core   +23 more sources

Whole tissue imaging of cellular boundaries at sub-micron resolutions for deep learning cell segmentation: Applications in the analysis of epithelial bending of ectoderm. [PDF]

Dev Dyn
Abstract Background To understand cellular morphology, biologists have relied on traditional optical microscopy of tissues combined with tissue clearing protocols to image structures deep within tissues. Unfortunately, these protocols often struggle to retain cell boundary markers, especially at high enough resolutions necessary for precise cell ...
Norris SCP, Hu JK, Shubin NH.
europepmc   +2 more sources

Proteomic analysis of the zone of degeneration at the mitosis-meiosis transition stage in wild-caught male catshark (Scyliorhinus canicula), correlated with an unusually high-water temperature in the English Channel. [PDF]

J Fish Biol
Abstract In the context of current global change, variations in water temperature are one of the environmental conditions with serious consequences for marine life, including reproductive processes. In the small spotted catshark Scyliorhinus canicula, spermatogenesis occurs in spermatocysts composed of synchronously developing germ cells associated ...
Jeanne F, Pilet S, Heighton S, Bernay B, Sourdaine P.   +4 more
europepmc   +2 more sources

Apristurus iterum, a new shark discovered based on egg case morphology and sequence data obtained from a formalin-fixed specimen. [PDF]

J Fish Biol
Abstract Apristurus iterum, a new species of deepwater catshark, is described from northeastern Australia. The new species is diagnosed through examination of its unique egg case morphology based on a single whole gravid female specimen and 10 egg cases deposited in different Australian ichthyological collections.
White WT, O'Neill HL, Jayasinghe SA.
europepmc   +2 more sources

Evolutionary Transition in the Regulation of Vertebrate Pronephros Development: A New Role for Retinoic Acid

Cells, 2022
The anterior-posterior (AP) axis in chordates is regulated by a conserved set of genes and signaling pathways, including Hox genes and retinoic acid (RA), which play well-characterized roles in the organization of the chordate body plan. The intermediate
Pascal Schmidt, Eva Leman, Ronan Lagadec, Michael Schubert, Sylvie Mazan, Ram Reshef   +5 more
doaj   +1 more source

Developmental genoarchitectonics as a key tool to interpret the mature anatomy of the chondrichthyan hypothalamus according to the prosomeric model

Frontiers in Neuroanatomy, 2022
The hypothalamus is a key vertebrate brain region involved in survival and physiological functions. Understanding hypothalamic organization and evolution is important to deciphering many aspects of vertebrate biology.
Gabriel N. Santos-Durán, Susana Ferreiro-Galve, Sylvie Mazan, Ramón Anadón, Isabel Rodríguez-Moldes, Eva Candal   +5 more
doaj   +1 more source

Key drivers of at-vessel mortality in demersal sharks. [PDF]

Conserv Biol
Abstract Chondrichthyans are highly vulnerable to fisheries overexploitation, and postcapture mortality poses a significant threat to most species. Global bycatch mitigation guidelines recommend adopting hierarchical decision‐making approaches tailored to species‐specific vulnerabilities and socioeconomic and regulatory contexts.
Ruiz-García D, Barría C, Raga JA, March D.   +3 more
europepmc   +2 more sources

The complete mitogenome of the blackgill catshark, Parmaturus melanobranchus (Chan, 1966)

Mitochondrial DNA. Part B. Resources, 2021
A rare specimen of Parmaturus melanobranchus was collected from the South China Sea. The complete mitochondrial genome of the specimen was sequenced using Illumina Hiseq platform and assembled with Geneious and Trinity.
Wenjun Chen, Xiaogu Wang, Xiangxing Gao, Xiaohui Gao, Chen Fang, Chenhong Li   +5 more
doaj   +1 more source