391 Works

A new species of Allomogurnda (Gobioidei: Eleotridae) from the Sepik River system of Papua New Guinea

Gerald R. Allen & Douglass F. Hoese
Allomogurnda multicincta, n. sp. is described on the basis of 168 specimens, 11-36 mm SL, collected from Malas Creek, a small tributary of the Sepik River, Papua New Guinea. Morphological and preliminary genetic comparisons indicate it is closely related to A. nesolepis, which is widely distributed in northern New Guinea. The new species differs from A. nesolepis and all other members of the genus in typically having fewer predorsal scales (15-18 versus 15-24, but usually...

A first record of the vanishing silhouette goby Silhouettea evanida (Gobiidae) in Indonesian waters

Muhammad Iqbal, Doni Setiawan, Riza Kadarisman, Arum Setiawan & Indra Yustian
In April 2017, some individuals of the vanishing silhouette goby Silhouettea evanida were identified and photographed in the estuary of the Sembilang River, South Sumatra province, Indonesia. There is no previous report on the occurrence of Silhouettea evanidain Indonesia, and this observation constitutes a first record for the country.

First record of Phoxinus csikii Hankó, 1922 (Actinopterygii, Cypriniformes) in France

Gaël P.J. Denys & Sébastien Manne
A molecular identification via DNA barcoding (COI marker, 651 bp) was done on a minnow caught in the Rupt de Mad stream at Essey-et-Maizerais (Rhine/Moselle catchment). Accordingly, the specimen belongs to the recently revalidated Phoxinus csikii Hankó, 1922. It is the first record of this species in France, and the fourth minnow species known in this country.

Age and growth of megrim Lepidorhombus whiffiagonis (Scophthalamidae) from eastern central Adriatic Sea

Mate Šantić, Nika Stagličić, Armin Pallaoro, Martina Markov & Ivan Jardas
The age and growth parameters were analysed for Lepidorhombus whiffiagonis (Walbaum, 1792) collected in the eastern central Adriatic. Samples were collected monthly from January to December 2006 on the random basis, with a total of 1118 specimens analysed (538 males and 580 females). The values of b for males (3.166), females (3.212) and total (3.187) indicated positive allometric growth. Growth zones on otoliths revealed seven age classes, ranging from 1 to 7 years, including a...

Postembryonic development of appendicular and axial skeletons in Labeo parvus (Cyprinidae)

Djiman Lederoun, Elie Montchowui, Philippe Lalèyè, Pascal Poncin & Pierre Vandewalle
The axial and appendicular skeletons in Labeo parvus (Cyprinidae) were investigated from hatching to 29 days post-hatch (dph) in cleared and stained specimens. The cartilaginous axial caudal skeleton of L. parvus develops like in other cyprinids. The first cartilaginous elements, namely hypurals I and II, appeared 6 dph before notochord flexion. Ossification of the complex begins with that of caudal rays on day 10, next the vertebral bodies, and then all the hypurals on day...

Using body mass index (BMI) to estimate mercury contamination of the blue shark (Prionace glauca) and the shortfin mako (Isurus oxyrinchus)

Sebastian Biton Porsmoguer, Ivan Dekeyser, Daniela Banaru, Marc Bouchoucha & Françoise Marco-Miralles
Blue shark (Prionace glauca) and shortfin mako (Isurus oxyrinchus) specimens were caught in the North-eastern Atlantic Ocean by Spanish and Portuguese longliners. They are considered as top-predators, particularly susceptible to bioaccumulate mercury (Hg). The Hg mean levels in blue shark and shortfin mako were 0.4 (SD = 0.3 mg kg-1) and 0.5 (SD = 0.9 mg kg-1), respectively. The body mass index (BMI) was tested to demonstrate the accumulation of Hg in these two top-predators,...

Confirmation of functional hermaphroditism in six grouper species (Epinephelidae: Epinephelinae) from the Gulf of Mexico

Thierry Brulé, Doralice Caballero-Arango, Ximena Renan & Teresa Colás-Marrufo
Diagnosing hermaphroditism in teleost fish requires careful assessment and is particularly challeng- ing in groupers. Established, reliable criteria to detect functional protogynous hermaphroditism were used to col- lect data on sexual pattern in six minimally studied grouper populations on the continental shelf of the Yucatan Peninsula. Individuals in the process of changing sex (transitional individuals), considered strongly indicative of protogyny, were observed. Functional protogynous hermaphroditism was confirmed for Epinephelus morio (Valenciennes, 1828) and Mycteroperca venenosa...

Régime alimentaire de Thysochromis ansorgii (Cichlidae) dans la forêt des marais Tanoé-Ehy (Côte d’Ivoire)

Yao Aristide Konan, Siaka Ouattara & Tidiani Koné
Le régime alimentaire de Thysochromis ansorgii (Boulenger, 1901) a été étudié dans la forêt des marais Tanoé-Ehy (FMTE, Côte d’Ivoire) en fonction de la taille des poissons et des saisons hydrologiques. Au total, 149 poissons ont été capturés mensuellement à l’aide de filets verveux et de filets maillants entre mars 2012 et février 2013. La longueur standard et le poids frais des spécimens variaient respectivement entre 45 mm et 110 mm LS et entre 3,3...

Seminiferous tubule number and surface: validation of objective parameters to estimate reproduction activity of male European anchovy (Engraulis encrasicolus, L.)

Amina Rahmani, Keltoum Ichalal & Mokrane Iguer-Ouada
The present study aims to establish new quantitative parameters to objectively study reproductive activity in the male anchovy, Engraulis encrasicolus. The experimental design measured, at a microscopic level, the number (STN) and area (STA) of the seminiferous tubules during the reproductive season. This was conducted in relation to gonadosomatic index (GSI) and the five-degree macroscopic standard maturity staging of Brown-Petersen et al. (2011): immature, developing, spawning capable, regressing, regenerating. Fresh samples with a total of...

Diet of the black scorpionfish Scorpaena porcus (Scorpaenidae) of the gulf of Annaba, Algeria

Nihed Omri, Farid Derbal & M. Hichem Kara
The diet of the black scorpionfish Scorpaena porcus (Linnaeus, 1758) of Annaba Gulf (Eastern Algeria) was studied from April 2011 to April 2012. A total of 520 specimens, with a total length between 10.2 and 27.8 cm, were analyzed. Analysis of the digestive contents revealed a dominance of decapods crustaceans (%IRI = 91.2). This species ingested an average of 0.58 prey weighing 0.73 g. For both sexes, arthropods were essential prey (%IRIm = 73.6; %IRIf = 86.9). The diet of large (L) individuals...

Composition et structure des peuplements ichtyologiques marins de l’île de Mayotte (sud-ouest de l’océan Indien)

Julien Wickel, Alban Jamon, Mathieu Pinault, Patrick Durville & Pascale Chabanet
Ce premier inventaire des poissons marins de l’île de Mayotte a été réalisé en majorité à partir d’informations issues de données non publiées. Un total de 759 espèces appartenant à 118 familles et 360 genres a été recensé. De grandes similarités avec d’autres zones de la région sud-ouest de l’océan Indien sont observées dans la composition des peuplements, notamment dans la diversité relative des principales familles. Les peuplements de l’île se démarquent toutefois par une...

Long term monitoring of coral and fish assemblages (1983-2014) in Tiahura reefs, Moorea, French Polynesia

René Galzin, David Lecchini, Thierry Lison de Loma, Charlotte Moritz, Valeriano Parravicini & Gilles Siu
Coral reefs are one of the most diverse ecosystems on Earth and sustain millions of people worldwide. However, coral reefs are temporally dynamic and fragile systems subject to ever increasing disturbances of anthoropogenic and natural origins. Understanding the patterns and trajectories of changes through time is urgently needed to estimate the resilience of coral reefs. To ascertain these patterns, we depend on the availability of long-term datasets, which are seldom available. In this study, we...

On the association of carangid juveniles, Alepes djedaba, with the jellyfish Rhizostoma pulmo

M. Levent Artüz & Sezginer Tuncer
We investigated the fish-jellyfish association on 99 specimens of jellyfishes, collected from seven different sampling sites during summer 2015. The collected jellyfish were Rhizostoma pulmo (Macri, 1778) and the fish juveniles associated with these hosts were identified as Alepes djedaba (Forsskål, 1775). The carangid A. djedaba is closely associated with many species of large scyphozoan jellyfishes. This study provides basic information about the spatial distribution of this fish-jellyfish association, based on observations in the west...

Morphological characterization of striped seabream (Lithognathus mormyrus, Sparidae) in some Mediterranean lagoons

Ibtissem Hammami, Lilia Bahri-Sfar, Myriam Kaouèche, Gael Grenouillet, Sovan Lek, M. Hichem Kara & Oum Kalthoum Ben Hassine
Morphological variation of Lithognathus mormyrus (Linnaeus, 1758) samples harvested in six Mediterranean lagoons was investigated using 23 truss elements and 11 conventional linear measurements. Multivariate analyses revealed a highly significant morphological discrimination between western Mediterranean basin samples (lagoons of Bizerta, Ghar El Melh and Mellah) that differ from each other but are also differentiated from the oriental lagoon samples (lagoons of El Biban, Farwa and Venice) by some variables, which are related to the head...

First record of Lagocephalus sceleratus in the Adriatic Sea (Croatian coast), a Lessepsian migrant

Jadranka Sulić Šprem, Tatjana Dobroslavić, Valter Kožul, Ana Kuzman & Jakov Dulčić
The first record of a Lessepian migrant Lagocephalus sceleratus (Gmelin, 1789) in the Adriatic Sea was noted on 17 Oct. 2012. A sexually mature female (Lt = 66.3 cm) weighing 3.531 kg was caught on the northern side of Jakljan Island (southern Adriatic).

A new species of Lentipes (Gobiidae) from the Solomon Islands

Philippe Keith, Clara Lord, David Boseto & Brendan C. Ebner
A new species of Lentipes, a freshwater Sicydiinae goby, is described from streams of Solomon Islands. It differs from other species of the genus by a combination of characters including an urogenital papilla lacking lateral lobes and retractable into a sheath-like groove, the number of pectoral fin rays, the number of scales, the number of tricuspid teeth in the upper jaw, and a specific body colour in male.

Domestication level of the most popular aquarium fish species: is the aquarium trade dependent on wild populations?

Fabrice Teletchea
Aquarium fish trade has strongly increased in the past decades to become one of the most popular hobbies globally. Historically, all aquarium fish traded were wild-caught. Then, an increasing number of fish species have been produced in captivity. The main goal of the present study is to apply the concept of domestication level to the hundred most popular aquarium fish species in Europe and North America. The levels of domestication of freshwater aquarium fish species...

Diet composition and variations of Morocco dentex Dentex maroccanus (Sparidae) from Eastern Algeria

Rima Mohdeb, Farid Derbal & M. Hichem Kara
Morocco dentex is an important commercial sparid fish on Algerian coasts, where its distribution is irregular. In two sites, Jijel and El Kala areas, located in the northeast of Algeria, 1725 specimens of Dentex maroccanus were caught and examined for diet composition study and trophic level estimation. Their total length (weight) ranged from 10.4 cm (16.05 g) to 26.8 cm (332.47 g). The Relative Importance Index (%IRI) was used to characterize the relative importance of...

Ecomorphology and diet of two species of Acestrorhynchus from Brazilian Northeast

Elãine C. dos S Dourado, Jorge L.S. Nunes & Nivaldo M. Piorski
Acestrorhynchus falcatus (Bloch, 1794) and A. heterolepis (Cope, 1878) are two species frequently found in rivers from Baixada Maranhense, Maranhão State, northeastern of Brazil. The ecomorphological adaptations of these species were studied based on a collection of 445 specimens using morphometric tools. Seventeen landmarks were defined on the lateral side of the individuals and digitalized by the TPS Dig program. The data matrix was submitted to a Relative Warps Analysis (RWA) and a Canonical Variables...

Seasonal and interannual evolutions of biogenic silica standing stock and production at the KERFIX time-series station off the Kerguelen Islands

Bernard Quéguiner, Paul Tréguer & Rudolph Corvaisier
The biogeochemical cycle of silicon was studied at the Kerguelen Fixed Station (KERFIX) between 1992 and 1994. The timeseries shows a seasonal use of the stock of silicic acid decoupled from that of nitrate. Thus, silicon probably plays an important role in limiting the primary production of diatoms in that area, characteristic of the permanently open ocean zone. Despite this, given their very low growth rates, the dominant diatoms are strongly silicified. The results of...

High primary production and vertical export of carbon over the Kerguelen Plateau as a consequence of natural iron fertilization in a high-nutrient, low-chlorophyll environment

Bernard Quéguiner, Stéphane Blain & Thomas Trull
The KEOPS cruise took place during the austral summer of 2005 on the Kerguelen Plateau. The annual bloom of the plateau is correlated with the iron supply from bottom waters as a result of internal waves generated by the tide. Fertilization allows an intense bloom of diatoms that use the stock of available silicic acid; silicon becomes limiting at the end of the productive period. Surprisingly, the intensity of nitrogen regeneration maintains the use of...

Biodiversity of the benthos off Kerguelen Islands: overview and perspectives

Nadia Améziane, Marc Eléaume, Lenaïg G. Hemery, Françoise Monniot, Arzhela Hemery, Mélyne Hautecoeur & Agnès Dettaï
The Kerguelen Plateau possesses a very diverse benthic fauna. Over the years, the number of species recorded from the Kerguelen has substantially increased. From 172 species reported by Arnaud (1974), the total number of species has increased dramatically to 735 (Jouventin et al., 1996) and then to 960 in the present study. This area is particularly vulnerable to human activities and global climate change. Coastal benthic ecosystems are likely to be heavily impacted. However, these...

Kerguelen Islands: a living laboratory to understand the benthic biodiversity of the Antarctic

Jean-Pierre Feral & Élie Poulin
The high proportion of brooding (50 to 70% depending on phyla) compared with broadcaster species among invertebrates living along the coast of the Southern Ocean has been traditionally interpreted as an adaptation to local environmental conditions. Currently, however, species with a planktotrophic developmental mode are ecologically dominant along coastal areas, in terms of abundance of individuals. The fact that Kerguelen Island is inhabited by such species and that the French base Port-aux-Français, with its equipped...

Description of a new deep-sea Lantern Shark Etmopterus viator sp. nov. (Squaliformes: Etmopteridae) from the Southern Hemisphere

Nicolas Straube, Guy Duhamel, Nicolas Gasco, Jürgen Kriwet & Ulrich K. Schliewen
Lantern sharks (Etmopterus spp.) constitute a regular by-catch in longline fisheries conducted along the north-eastern Kerguelen Plateau shelf in depths of 600 to 1700 m. Kerguelen lantern sharks are morphologically close to E. granulosus, E. sp. B, South African E. cf. granulosus, and E. litvinovi. However, molecular phylogenetic analyses support the hypothesis that they represent a distinct cryptic species, which is in line with morphological characters separating the species from its Southern Hemisphere congeners. The new species is...

Habitat use by Patagonian toothfish (Dissostichus eleginoides Smitt, 1898) on the Kerguelen Plateau around Heard Island and the McDonald Islands

Dirk C. Welsford, Steven G. Candy, Timothy D. Lamb, Gabrielle B. Nowara, Andrew J. Constable & Richard Williams
The Patagonian toothfish (Dissostichus eleginoides) is one of the largest and most ubiquitous benthopelagic predatory fish found in the sub-Antarctic. This species supports the largest single species scalefish fishery in the southern ocean, and the largest fishery for toothfish occurs on the Kerguelen Plateau, with landings of >5 000 t.yr-1 from the French EEZ around Kerguelen Islands and 2 500 t.yr-1 from the Australian EEZ around Heard Island and the McDonald Islands in 2009. This study provides...

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