Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
We explore the relationships within Serraniformes (Li et al., 2009) using a dense taxon sampling and seven nuclear markers. Six had already used been for teleost phylogeny (IRBP, MC1R, MLL4, Pkd1, Rhodopsin, and RNF213) at other scales, and one (MLL2) is new. The results corroborate the composition of Serraniformes described in previous publications (some Gasterosteiformes, Perciformes and Scorpaeniformes). Within the clade, Notothenioidei and Zoarcoidei are each monophyletic. Cottoidei was not monophyletic due to placement of the genus Ebinania (Psychrolutidae). Our independent data confirm the sister-group relationship of Percophidae and Notothenioidei as well as the division of Platycephaloidei in four different groups (Bembridae, Platycephalidae, Hoplichthyidae and Peristediidae with Triglidae). Within Cottoidei, Liparidae and Cyclopteridae formed a clade associated with Cottidae, the genus Cottunculus (Psychrolutidae), and Agonidae. Serranidae and Scorpaenidae are not monophyletic, with the Serranidae divided in two clades (Serraninae and Epinephelinae/Anthiinae) and Scorpaenidae including Caracanthidae and the genus Ebinania (Psychrolutidae). We discuss some morphological characters supporting clades within the Scorpaenidae.
ISSN: 1055-7903

hal-01544909
https://hal.archives-ouvertes.fr/hal-01544909
DOI : 10.1016/j.ympev.2012.12.020

Éditeur(s) : HAL CCSD Public Library of Science
Résumé : International audience
This study, conducted in the brain of a perciform fish, the European sea bass, aimed at raising antibodies against the precursor of the kisspeptins in order to map the kiss systems and to correlate the expression of kisspeptins, kiss1 and kiss2, with that of kisspeptin receptors (kiss-R1 and kiss-R2). Specific antibodies could be raised against the preprokiss2, but not the preoprokiss1. The data indicate that kiss2 neurons are mainly located in the hypothalamus and project widely to the subpallium and pallium, the preoptic region, the thalamus, the pretectal area, the optic tectum, the torus semicircularis, the mediobasal medial and caudal hypothalamus, and the neurohypophysis. These results were compared to the expression of kiss-R1 and kiss-R2 messengers, indicating a very good correlation between the wide distribution of Kiss2-positive fibers and that of kiss-R2 expressing cells. The expression of kiss-R1 messengers was more limited to the habenula, the ventral telencephalon and the proximal pars distalis of the pituitary. Attempts to characterize the phenotype of the numerous cells expressing kiss-R2 showed that neurons expressing tyrosine hydroxylase, neuropeptide Y and neuronal nitric oxide synthase are targets for kisspeptins, while GnRH1 neurons did not appear to express kiss-R1 or kiss-R2 messengers. In addition, a striking result was that all somatostatin-positive neurons expressed-kissR2. These data show that kisspeptins are likely to regulate a wide range of neuronal systems in the brain of teleosts.
ISSN: 1932-6203

hal-00877315
https://hal.archives-ouvertes.fr/hal-00877315
https://hal.archives-ouvertes.fr/hal-00877315/document
https://hal.archives-ouvertes.fr/hal-00877315/file/Expressionsur Kisspeptins-accepted.pdf
DOI : 10.1371/journal.pone.0070177

Éditeur(s) : HAL CCSD John Wiley & Sons
Résumé : International audience
Kisspeptins are now considered key players in the neuroendocrine control of puberty and reproduction, at least in mammals. Most teleosts have two kiss genes, kiss1 and kiss2, but their sites of expression are still poorly documented. As a first step in investigating the role of kisspeptins in the European sea bass, a perciform fish, we studied the distribution of kiss1 and kiss2-expressing cells in the brain of males and females undergoing their first sexual maturation. Animals were examined at early and late in the reproductive season. We also examined the putative expression of estrogen receptors in kiss-expressing cells and, finally, we investigated whether kisspeptins are expressed in the pituitary gland. We show that kiss1-expressing cells were consistently detected in the habenula and, in mature males and females, in the rostral mediobasal hypothalamus. In both sexes, kiss2-expressing cells were consistently detected at the level of the preoptic area, but the main kiss2 mRNA-positive population was observed in the dorsal hypothalamus, above and under the lateral recess. No obvious sexual differences in kiss1 and kiss2 mRNA expression were detected. Additional studies based on confocal imaging clearly showed that most kiss1 mRNA-containing cells of the mediobasal hypothalamus strongly express ERα and slightly express ERβ2. At the pituitary level, both sexes exhibited kiss1 mRNA expression in most FSHβ-positive cells and never in LHβ-positive cells.
ISSN: 0092-7317

hal-00877326
https://hal.archives-ouvertes.fr/hal-00877326
PUBMED : 22886357
DOI : 10.1002/cne.23211

Éditeur(s) : Société des sciences naturelles de la Charente-Maritime
Résumé : During 1975, a number of rare fishes or caught out of their distr:ibution area were observed in La Rochelle, especially Chlamycloselachus anguineus Garman, 1884 (one specimen) Mitsukurina sp. (three specimens), Pseudotriakis microdon Capello, 1868 (five specimens), Somniosus sp. (one specimen), probably a new species, Zenopsis cO/1chîfer (Lowe, 1852) (one specimen) recorded for the first time from the French Atlantic coast, Puntazzo puntazzo (Gmelin, 1789) (one specimen), Hyperoglyphe percifonnîs (Mitchill, 1818) (one specimen), Glyptocephalus cynoglossus (Linné, 1758) (one specimen) caught off the coast of Vendée and Lima11da limanda (Linné, 1758) (one specimen) caught off the coast of Landes. On the other hand, the authors found two albino fishes and five specimens remarkable for their large size. They also observed nine species of fishes from the Bay of Biscay belonging to a colder fauna and eight species of fishes from the Bay of Biscay belonging to a hotter fauna. Not controlled OCR
En 1975, les auteurs ont observé à la Rochelle un certain nombre de poissons «rares» ou capturés en dehors de leur aire de répartition et plus particulièrement un exemplaire de Chlamycloselachus anguineus Garman, 1884, trois exemplaires de Mitsukurina sp., cinq exemplaires de Pseuclotriakis microdon Capello, 1868, un exemplaire de Somniosus sp., cette espèce étant probablement nouvelle, un exemplaire de Zenopsis conchifer (Lowe, 1852) signalé pour la première fois au large des côtes françaises de l'Atlantique, un exemplaire de Puntazzo plmtazzo (Gmelin, 1789), un exemplaire d'Hyperoglyphe percîformis (Mitchill, 1818), un exemplaire de Glyptocephalus cynoglossus (Linné, 1758) pêché au large de la Vendée et un exemplaire de Limanda limanda (Linné, 1758) pris au large de la côte des Landes. D'autre part, ils ont observé deux cas d'albinisme ainsi que cinq exemplaires remarquables par leur grande taille. Ils ont aussi noté la présence dans le golfe de Gascogne de neuf espèces de poissons appartenant à une faune plus froide et de huit à une faune plus chaude. OCR non contrôlé
Annales de la Société des Sciences Naturelles de la Charente-Maritime (Société des sciences naturelles de la Charente-Maritime), 1976 , Vol. 6 , N. 3 , P. 177-190

Droits : 1976 Société des sciences naturelles de la Charente-Maritime
http://archimer.ifremer.fr/doc/1976/publication-3645.pdf
http://archimer.ifremer.fr/doc/00000/3645/