Solea bleekeri Boulenger, 1898, a junior synonym of Pegusa nasuta (Pallas, 1814), with the recognition and redescription of Solea turbynei Gilchrist, 1904 (Pleuronectiformes: Soleidae)Josiane Vachon, Martine Desoutter & François Chapleau
Solea bleekeri Boulenger, 1898, which was described from a single specimen, is not a valid species; the holotype of this nominal species belongs to Pegusa nasuta (Pallas, 1814). Solea turbynei Gilchrist, 1904 is recognized and redescribed to include all specimens of Solea that have been traditionally described as belonging to S. bleekeri. Solea simonensis Bonde, 1922 based on a single anomalous specimen is confirmed as a junior synonym of S. turbynei.
New data on the reproductive biology of the Atlantic weasel shark, Paragaleus pectoralis (Chondrichthyes: Hemigaleidae) from the coast of Senegal (eastern tropical Atlantic)Christian Capapé, Youssouph Diatta, Mansor Diop, Christian Reynaud & Olivier Guélorget
The Atlantic weasel shark, Paragaleus pectoralis (Garman, 1906), is the only species of the genus Paragaleus to be recorded off the western coast of Africa. It is commonly landed at the fishing sites along the Senegalese coast. Adult males and females are mostly captured in spring and summer. The smallest male and female adults were 810 mm and 900 mm total length (TL), respectively. The largest male and the largest female adults were 1.32 m...
A new Varicorhinus species, V. axelrodi n.sp., is described from the Kouilou (Republic of Congo-Brazzaville) and the Nyanga and Ngounie in Gabon. V. axelrodi differs from all congeners by the combination of the following characters: absence or extreme reduction of barbels, last simple dorsal fin ray weak and flexible, and mouth opening more or less straight. Prior to the present study three species (V. sandersi, V. steindachneri and V. tornieri) were known from the inland...
Os et ligaments intermusculaires chez les poissons plats [Teleostei : Pleuronectiformes] : interprétations phylogénétiquesBruno Chanet, François Chapleau & Martine Desoutter
Le but de ce travail est de reconsidérer certains des arguments présentés par Patterson et Johnson (1995) sur les os intermusculaires chez les Pleuronectiformes. Sur la base de la présence de ces structures et de la localisation des premières côtes chez deux familles de poissons plats (Bothidae et Samaridae), ces auteurs suggèrent que ces deux familles sont étroitement apparentées. Ils insistent également sur l’intérêt des os et ligaments intermusculaires pour reconstituer la phylogénie du groupe....
Polyculture is the association of fish species, mostly cyprinids, feeding at different levels of the aquatic pond ecosystem. It is an efficient food production system, which typically produces five tonnes of fish/ha/year without distribution of formulated artificial feeds but with intense organic fertilisation as well as grass and agricultural by-products. The exact figures of polyculture production in the world are not known precisely. A part of the production of cyprinids is due to monoculture of...
Scale morphology and histology of some fossil and extant teleosts, as well as some stem group teleosts such as Pachycormiforms, are compared. Basal teleosts have lepidosteoid type scales, although cycloid scales appear at the †Leptolepis coryphaenoides level. Pachycormiforms have mainly lepidosteoid scales, but amioid type scales also occur within this clade, confirming that pachycormiforms are not teleosts. An osteoglossid type of scale is defined, based on morphological and histological characters and is considered a derived...
Phylogenetical relationships and palaeozoogeography of the marine Cretaceous Tselfatiiformes (Teleostei, Clupeocephala)Louis Taverne & Mireille Gayet
The order Tselfatiiformes comprises three families, the Protobramidae (three genera and four species), the Eoplethodidae (one genus and one species) and the Plethodidae (seventeen genera and twenty-seven species). Although very specialised, the Protobramidae are the most primitive family within the order. Eoplethodidae, only known by the caudal skeleton, are less evolved than the Plethodidae. Within the Plethodidae, Paranogmius, the only one keeping a subtemporal fossa, is the most plesiomorphic genus. A more apomorphic clade unites...
Apristurus melanoasper, a new species of deep-water catshark from the North Atlantic (Chondrichthyes: Carcharhiniformes: Scyliorhinidae)Samuel P. Iglésias, Kazuhiro Nakaya & Matthias Stehmann
A new deep-water catshark, Apristurus melanoasper n. sp., is described based on 53 specimens from the North Atlantic Ocean at 512 to 1520 m depth. This new species is characterized by having longer upper labial furrow than the lower one, high count of spiral intestine valves, a long abdomen, large dermal denticles and black coloration of the body. Among the species of the North Atlantic, this new species is most similar to A. laurussonii, but...
Parioglossus multiradiatus n. sp. is described on the basis of 9 specimens collected from streams in the Seychelles Islands. It differs from other species belonging to the genus by a combination of characters including the absence of preopercular pore, the presence of posterior nasal pore, the presence of a dark lateral body stripe, the number of scales in lateral series (98-109), the number of soft rays in second dorsal (I, 16-17) and anal (I, 17-18)...
In fish, as in all poikilotherms, growth is strongly dependent on water temperature. Given that the GH/IGF system regulates growth, it could mediate the effects of temperature on fish growth. Indeed, before hatching, the higher embryonic growth rate in rainbow trout at high temperatures is associated with higher expression of the IGF2 gene in the whole embryo. Furthermore, post-natal growth fluctuations depend on water temperature and are associated with variations of plasma GH and IGF1....
Les rougets barbets (Mullus surmuletus et M. barbatus) sont présents en Méditerranée, dans l’Atlantique, en Manche et en mer du Nord. Dès l’âge d’un mois, les juvéniles de rouget de roche, nouvellement métamorphosés, sont accessibles au chalut à perche utilisé dans le Blavet. Les meilleures pêches ont été réalisées en vives-eaux, aux dernières heures de la marée descendante à l’étale de basse mer. À ce stade de développement, les jeunes poissons mesurent entre 4 et...
Most studies involving Pacific reef fishes use underwater visual censusing techniques to estimate their biomass and stock. This requires to know the length-weight relationships of all the species censused. Currently, only a small proportion of these relationships (15.4%) are available for reef fish species in the Pacific area. In the present article we propose length-weight relationships at four organisation levels: species, genera, families and morphological groups. A data base of 53,800 specimens belonging to 788...
MEC-4 and UNC-8 are subunits of the DEG/ENaC family of voltage-independent Na+ channels in C. elegans (Driscoll and Chalfie 1991, Canessa, Horisberger et al. 1993, Waldmann, Champigny et al. 1996, Waldmann, Champigny et al. 1997, de Weille, Bassilana et al. 1998, Waldmann and Lazdunski 1998). While MEC-4 is expressed in body touch neurons where it mediates the transduction of gentle touch sensation (Driscoll and Chalfie 1991, O'Hagan, Chalfie et al. 2005), UNC-8 is primarily expressed...
The Impact of COVID-19 on Older Adults: Findings from the 2021 International Health Policy Survey of Older AdultsReginald D. Williams II, Arnav Shah, Michelle M. Doty, Katharine Fields & Molly FitzGerald
The pandemic has exposed the economic vulnerability of older U.S. adults; survey findings show the U.S. can do more to help older adults’ meet their care needs.
Jusqu’à présent, il existe peu de données nationales sur la prestation de services de garde au Canada, malgré les investissements effectués dans la création d’un programme national de garde d’enfants. Statistique Canada, en collaboration avec EDSC, a élaboré l’Enquête canadienne sur la prestation de services de garde (ECPSG) pour déterminer la faisabilité d’une base de sondage visant à réaliser une enquête auprès des responsables de services de garde d’enfants et pour permettre la diffusion de...
Deletion of a putative HDA-1 binding site in the hlh-2 promoter eliminates expression in C. elegans dorsal uterine cellsTaylor N Medwig-Kinney, Nicholas J Palmisano & David Q Matus
During C. elegans development, two cells, Z1 and Z4, give rise to the entire somatic gonad, including populations of dorsal uterine (DU) and ventral uterine (VU) cells, as well as the postmitotic anchor cell (AC), which invades the underlying basement membrane during uterine-vulval morphogenesis (Kimble & Hirsh, 1979; Sherwood & Sternberg, 2003). The helix-loop-helix transcription factor hlh-2 (E/Daughterless) is expressed in these three cell types, among others, and is particularly enriched in the AC following...
Americans’ Experiences with ACA Marketplace and Medicaid Coverage: Access to Care and Satisfaction — Findings from the Commonwealth Fund Affordable Care Act Tracking Survey, February–April 2016Sara R. Collins, Munira Z. Gunja, Michelle M. Doty & Sophie Beutel
Sixty-one percent of those who have used ACA coverage are getting health care that they would not have been able to afford or have access to previously.
People who purchase their own ACA marketplace plan benefit not just from tax credits that lower the plan cost but also from reduced out-of-pocket costs.
Repealing the ACA Could Result in 2.6 Million Jobs Lost in 2019
Helmholtz Zentrum München27
Institut de Radioprotection et de Sûreté Nucléaire14
Public Health England9
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas9
Belgian Nuclear Research Centre8
Seibersdorf Laboratories (Austria)8
National Agency for New Technologies Energy and Sustainable Economic Development7
University of Beira Interior6