437 Works

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...

On the occurrence of the Por’s goatfish, Upeneus pori (Mullidae) in southern Tunisia (central Mediterranean)

Jamila Ben Souissi, Hamadi Mejri, Jeanne Zaouali & Christian Capapé

A new species of varicorhinus (ostariophysi: cyprinidae) from West-Central Africa

Abebe Getahun, Melanie L.J. Stiassny & Guy G. Teugels
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 phylogénétiques

Bruno 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....

Trends in cyprinid polyculture

Roland Billard & Paolo Berni
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...

Histology and morphology of the scales in some extinct and extant teleosts

François J. Meunier & Paulo M. Brito
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...

Second record of Seriola rivoliana (Carangidae) in the Mediterranean

Luca Castriota, Manuela Falautano, Silvestro Greco & Franco Andaloro

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...

First records of Cobitis elongatoides and Sabanejewia baltica (Cobitidae) for Germany

Jörg Bohlen, Jörg Freyhof & Christian Wolter

A new species of Parioglossus (Gobioidei, Ptereleotridae) from Seychelles Islands

Philippe Keith, Pierre Bosc & Pierre Valade
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)...

Premier signalement du requin tisserand, Carcharhinus brevipinna (Chondrichthyes: Carcharhinidae) pour la Nouvelle-Calédonie

Charles Caraguel & Samuel P. Iglésias

Does the GH/IGF system mediate the effect of water temperature on fish growth? A review

Jean-Charles Gabillard, Claudine Weil, Pierre-Yves Rescan, Isabel Navarro, Joaquim Gutierrez & Pierre-Yves Le Bail
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....

https://sfi-cybium.fr/fr/node/1317/edit

Konan N’Da & Christian Déniel
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...

A general approach to length-weight relationships for New Caledonian lagoon fishes

Michel Kulbicki, Nicolas Guillemot & Marion Amand
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...

Poecilopsetta megalepis Fowler 1934, un synonyme junior de Poecilopsetta plinthus (Jordan & Starks, 1904) (Pleuronectiformes : Poecilopsettidae)

Annie-Chantal Guibord & François Chapleau
Poecilopsetta megalepis Fowler, 1934, décrite à partir de spécimens capturés aux Philippines, lors des expéditions du vaisseau Albatross au début du XXe siècle, est un synonyme de P. plinthus (Jordan & Starks, 1904). Douze des 13 paratypes appartiennent au genre Nematops (11 spécimens de N. macrochirus et un N. grandisquama). Le treizième paratype correspond à la description de P. megalepis.

Cirrhilabrus bathyphilus, a new deep-dwelling labrid fish from the Coral Sea

John E. Randall & Bronson H. Nagareda
The labrid fish Cirrhilabrus bathyphilus is described as new from seven specimens collected in the Coral Sea, the holotype from Holmes Reef in the western part of the sea, a paratype from the aquarium trade, and 5 paratypes from 60-217 m from the Chesterfield Bank. This species is distinct in having 15 pectoral rays, 16-17 + 5 lateral-line scales, 5 median predorsal scales, 2 rows of scales on cheek, 14-15 gill rakers, a large eye...

Première capture de Pseudupeneus prayensis (Mullidae) en mer Catalane

Lluís Mercader

Preliminary notes on the reproductive biology of the lizardfish, Synodus saurus (Actynopterygii: Synodontidae) in the Azores

Luís Sousa, João P. Barreiros, Marta S.C. Soares, Maurício Hostim-Silva & Ricardo S. Santos
Between March and November 2000, 307 specimens of the lizardfish Synodus saurus (Linnaeus,1758) were captured on several coastal areas of Terceira Island, Azores. This species is an important coastal epibenthic predator. Although common, its biology, namely its reproduction, is virtually unknown. During the study period, 206 females (155 mm to 460 mm TL) and 101 males (269 mm to 290 mm TL), were captured. Sex ratio was 2:1 with more males in June. Gonados-somatic Index...

On the species of the genus Balistes described by Johann Julius Walbaum (1792)

Paolo Parenti
The status of six nominal species placed in the genus Balistes by Johann J. Walbaum (1792) is reported. Balistes longirostris and B. meulenii are shown to be senior synonyms of Oxymonacanthus longirostris (Bloch & Schneider, 1801) and Cantherines fronticinctus (Günther, 1867), respectively. Conditions exist, however, that allow “prevailing usage” of the latter names, as provided by Article 23.9.1 of the International Code of Zoological Nomenclature. Balistes auwawa, B. barbatus and B. talpa are shown to...

Contents, Cybium 44(4), 2020

Composition et variations du régime alimentaire du sparaillon Diplodus annularis (Sparidae) du golfe d’Annaba (Est de l’Algérie)

Farid Derbal, Sabah Nouacer & M. Hichem Kara
Le régime alimentaire du sparaillon Diplodus annularis du golfe d’Annaba est étudié au cours d’un cycle annuel, entre octobre 1999 et septembre 2000. Un total de 719 estomacs est examiné dont 319 étaient vides, ce qui correspond à un coefficient de vacuité stomacale moyen de 44,37%. Ses variations mensuelles montrent que l’activité trophique est intense en octobre (CV = 20%) et relativement faible en janvier (CV = 76,67%). Le sparaillon est omnivore et son alimentation...

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