Results 41 to 50 of about 4,688 (194)

Classification of sharks in the Egyptian Mediterranean waters using morphological and DNA barcoding approaches. [PDF]

PLoS ONE, 2011
The identification of species constitutes the first basic step in phylogenetic studies, biodiversity monitoring and conservation. DNA barcoding, i.e. the sequencing of a short standardized region of DNA, has been proposed as a new tool for animal species
Marie Moftah, Sayeda H Abdel Aziz, Sara Elramah, Alexandre Favereaux   +3 more
doaj   +1 more source

Length–weight relations of 34 fish species caught by small-scale fishery in Korinthiakos Gulf (Central Greece) [PDF]

Acta Ichthyologica et Piscatoria, 2013
Length–weight (L–W) relations are presented for 34 fish species covering a full annual fishing period (231 fishing days) of professional small-scale fishery in Korinthiakos Gulf during 2008–2009.
D.K. Moutopoulos, A. Ramfos, A. Mouka, G. Katselis   +3 more
doaj   +3 more sources

Regionalization of the shark hindbrain: a survey of an ancestral organization

Frontiers in Neuroanatomy, 2011
Cartilaginous fishes (chondrichthyans) represent an ancient radiation of vertebrates currently considered the sister group of the group of gnathostomes with a bony skeleton that gave rise to land vertebrates. This out-group position makes chondrichthyans
Isabel eRodríguez-Moldes, Ivan eCarrera, Sol ePose-Méndez, Idoia eQuintana-Urzainqui, Eva eCandal, Ramón eAnadón, Sylvie eMazan, Susana eFerreiro-Galve   +7 more
doaj   +1 more source

Application of spatially robust stereo-BRUV sampling for quantifying fish assemblages in UK marine protected areas. [PDF]

Ecol Appl
Abstract Marine protected areas (MPAs) often lack adequate data on the status of marine assemblages to support evidence‐based management. Stereo baited remote underwater video (BRUV) systems offer a powerful, low‐cost tool for collecting ecological data, yet they remain underutilized in the North East Atlantic, especially compared to more invasive ...
Exeter OM, Broderick AC, Harrison XA, Garzon F, Morcom S, Pender R, Russell T, Saunders I, Somerfield PJ, Sugar K, Trundle C, Webber J, Hooper T, Metcalfe K.   +13 more
europepmc   +2 more sources

Outgroup, alignment and modelling improvements indicate that two TNFSF13-like genes existed in the vertebrate ancestor [PDF]

, 2017
Peer reviewedPublisher ...
Dooley, Helen, Pettinello, Rita, Redmond, Anthony K   +2 more
core   +1 more source

The complete mitochondrial genome and phylogenetic position of the leopard catshark, Poroderma pantherinum

Mitochondrial DNA. Part B. Resources, 2018
We present the first mitochondrial genome of a South African endemic catshark, Poroderma pantherinum. The complete mitogenome is 16,686 bp in length, comprising 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes, and one non-coding control region ...
Michaela van Staden, Katie S. Gledhill, Clint Rhode, Aletta E. Bester-van der Merwe   +3 more
doaj   +1 more source

The Tapetum inScyliorhinus Canicula [PDF]

Journal of the Marine Biological Association of the United Kingdom, 1961
Tapeta were examined of light- and dark-adapted dogfish.Scyliorhinus canicula. The tapetum in the eye of this fish is fixed; pigment processes in the tapetum do not move when a fish is changed from dark to light and vice versa. A black ventral field and a bright dorsal fundus are always present.
openaire   +1 more source

Oviparous elasmobranch development inside the egg case in 7 key stages. [PDF]

PLoS ONE, 2018
Embryological stages of oviparous elasmobranch during development can be difficult to identify, requiring magnification and/or fixation of an anaesthetized embryo.
Syafiq M Musa, Molly V Czachur, Holly A Shiels   +2 more
doaj   +1 more source

Sharks of the order Carcharhiniformes from the British Coniacian, Santonian and Campanian (Upper Cretaceous). [PDF]

, 2008
Bulk sampling of phosphate-rich horizons within the British Coniacian to Campanian (Upper Cretaceous) yielded very large samples of shark and ray teeth.
AGASSIZ L. J. R., ANTUNES M. T., BLAINVILLE H. M. D. de, BONE A., BONE A., CAPPETTA H., CAPPETTA H., CAPPETTA H., CAPPETTA H., CAPPETTA H., CAPPETTA H., CASE G. R., CASE G. R., COMPAGNO L. J. V., CUMBAA S. L., DAIMERIES A., DALINKEVICIUS J. A., DAVIS J. W., DINELEY D. L., FLETCHER T. P., FOWLER H. W., GARMAN S., GILL T., GRAY J. E., GURR P. R., HALTER M. C., HAY O. P., HERMAN J., HERMAN J., HERMAN J., HERMAN J., JARVIS I., JARVIS I., JARVIS I., JORDAN D. S., LERICHE M., LINNAEUS C., MARCK W. von der, MORTIMORE R. N., MULLER A., MULLER A., MULLER J., NOUBHANI A., SHIRAI S., SIVERSON M., UNDERWOOD C. J., UNDERWOOD C. J., UNDERWOOD C. J., UNDERWOOD C. J., UNDERWOOD C. J., WAGNER J. A., WELTON B. J., WHITE H. G. O., WILLCOX N. R., WOODROOF P. B., WOODWARD A. S.   +55 more
core   +1 more source

Divergent Expression of SPARC, SPARC-L, and SCPP Genes During Jawed Vertebrate Cartilage Mineralization

Frontiers in Genetics, 2021
While cartilage is an ancient tissue found both in protostomes and deuterostomes, its mineralization evolved more recently, within the vertebrate lineage.
Adrian Romero, Nicolas Leurs, David Muñoz, Mélanie Debiais-Thibaud, Sylvain Marcellini   +4 more
doaj   +1 more source