1,197 Works

Allozymic variability in European anchovy Engraulis encrasicolus ( L .) along the Moroccan coasts

Khalil Chahdi Ouazzani, Touria Benazzou & Malika Chlaida
Allozyme variation was used to investigate for the first time the genetic structure of European anchovies, Engraulis encrasicolus (Linnaeus, 1758), along the Moroccan coasts. A total of 420 individuals were collected at 11 sites during the anchovy spawning period of 2012. Eleven loci were tested, among them only LDH* [E.C:1.1.27] and PGM * [E.C:5.4.2.1] were polymorphic. Statistical analysis results showed no significant differentiation between samples (overall FST = 0.0077, p = 0.13). Genotypic proportions were...

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...

Otolith shape differences between Micropogonias manni and M. altipinnis (Sciaenidae)

Lina-Maria Duque-Vélez, Philippe Béarez & Raphaël Cornette
Sagitta morphology is much used in sciaenid systematics, as well as in archaeological, paleontological and ecological studies. Although morphometric characteristics of sagitta (length, height, thickness, weight,…) are useful to discriminate some marine and freshwater species, they are not fully conclusive in the case of Micropogonias altipinnis and M. manni. In order to give new elements for characterizing and discriminating these species we propose here to apply the geometric morphometry technique to sagittae of these species...

The detection of weakly developed plicidentine in teleost teeth using 3D tomography

Damien Germain, Jorge Mondéjar-Fernández & François J. Meunier
The detection of weakly developed plicidentine in ground sections can be difficult, because these structures cannot always be resolved by analysing two-dimensional thin-sections. X-ray tomography followed by 3D virtual modelling allows the non-destructive study of the spatial morphology of these important structures. Here, we illustrate dentine folds in the pulp cavity of the teeth in three teleost fishes, Arapaima gigas (Osteoglossiformes), Hoplias aimara (Characiformes) and Lophius piscatorius (Lophiiformes), and add data from a lepisosteid, Lepisosteus...

Fishing at Qal’at al-Bahrain, archipelago of Bahrain, from the Early Dilmun (2200 BC) to the Middle Islamic period (13-16th centuries AD)

Justine Vorenger
Excavations have taken place at the site of Qal’at al-Bahrain in Bahrain, Arabo-Persian Gulf, since the 1950’s. They have revealed significant architectural remains and a rich assortment of material, including ceramics, metal objects, figurative representations, inscriptions, seals, and botanical and faunal remains, which include a large number of fish bones. Its exceptional stratigraphy, which extends from the Early Dilmun (ca. 2200 BC) to the Middle Islamic period (13-16th centuries AD), enables us to study and...

Fish community assemblages in relation to environmental variables in the Lefini River, middle Congo River basin (Republic of Congo)

Armel Ibala Zamba, Emmanuel Vreven, Victor Mamonekene & Jos Snoeks
This study, one of the few ecological investigations of fishes recently performed in Africa, was undertaken in the Lefini River basin, a large right bank affluent of the Congo River in the Republic of Congo. The study area comprised 12 ecological stations, spread along 103 km of the river. Each station was sampled eight times over a two-year period, with fishing following standardized methods utilizing five monofilament gill nets of 10, 12, 15, 20 and...

Amphidromous life cycle of Eleotris fusca (Gobioidei : Eleotridae), a widespread species from the Indo-Pacific studied by otolith analyses

Marion Isabelle Mennesson, Hélène Tabouret, Christophe Pécheyran, Eric Feunteun & Philippe Keith
Eleotris fusca is a widespread amphidromous fish found in the Indo-Pacific area. Its life cycle is characterised by a marine pelagic larval phase allowing the species to disperse in the ocean and then to recruit to remote island rivers. In order to examine its migratory history and pelagic larval duration (PLD), otolith microchemical and microstructural analyses were undertaken on 100 specimens collected in the rivers of four areas: Mayotte, Reunion Island (Indian Ocean), Vanuatu and...

Evidence of late migrant smolts of Atlantic salmon (Salmo salar) in the Loire-Allier System, France

Hélène Imbert, Patrick Martin, Jocelyn Rancon, Vincent Graffin & Sylvie Dufour
Smolts of Atlantic salmon Salmo salar of the Loire-Allier system have to perform an exceptional distance of 900 km to reach the ocean from the upstream spawning grounds, while being subjected to connectivity disruption induced by the presence of dams as well as fluctuating climatic conditions. In order to successfully perform their marine entry, smolts should reach the estuary within a limited suitable period. This study concerns smolt emigration dates from upper Allier, and arrival...

Three new species of Lentipes from Indonesia (Gobiidae)

Philippe Keith, Renny K. Hadiaty, Nicolas Hubert, Frédéric Busson & Clara Lord
Three new species of Lentipes (L. argenteus, L. ikeae and L. mekonggaensis), freshwater gobies, are described from streams of Sumatra, Java, Bali and Sulawesi (Indonesia). They differ 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, tricuspid teeth in the upper jaw, and a specific body colour in males.

Emmelichthys marisrubri, a new rover from the southern Red Sea (Teleostei: Emmelichthyidae)

Ronald Fricke, Daniel Golani & Brenda Appelbaum-Golani
Emmelichthys marisrubri sp. nov. is described from three specimens, which were trawled off Eritrea in the southern Red Sea. The species is characterised by the spinous and soft-rayed portions of dorsal fin separated by a gap containing four short isolated spines, which are protruding over the dorsal surface of the body; depth of body 16.5-20.2% SL; lateral-line scales 80-83; dorsal-fin spines 12-13; dorsal-fin soft rays 8; pectoral-fin rays 18-20, total gill rakers 26-31. A revised...

A new species of Sicyopus (Gobiidae) from Java and Bali

Philippe Keith, Renny K. Hadiaty, Frédéric Busson & Nicolas Hubert
Sicyopus rubicundus n. sp., a sicydiine goby, is described from specimens collected in streams of Java and Bali (Indonesia). It differs from other species of this amphidromous genus by a combination of characters including a first dorsal fin with five spines in both sexes, a second dorsal fin with one spine and nine segmented rays, an anal fin with one spine and nine segmented rays, and a distinctive body colour in male.

Is hogfish Lachnolaimus maximus (Labridae) a diandric species?

Thierry Brulé, Virginia Elena Nóh-Quiñones, Julián René Torres-Villegas & Teresa Colás-Marrufo
Hogfish Lachnolaimus maximus (Walbaum, 1792) is the largest labrid in the Atlantic and a commercially important fish. In previous research, this fish has been defined as a monandric protogynous hermaphrodite, although characterization of hermaphroditism is particularly challenging in labrids. Examination of testicle structure is not always a wholly trustworthy method for distinguishing between diandric species (those with primary and secondary males) and monandric species (only secondary males). In some diandric species, morphological differences in the...

The relationship between Sardinella aurita landings and the environmental factors in Moroccan waters (21°-26°N)

Ayoub Baali, Najib Charouki, Khalid Manchih, Ismail Bessa, Ikram Elqoraychy, Mouna Elqendouci, Khadija Amenzoui & Ahmed Yahyaoui
The objective of this study is to assess the effects of environmental variations on the abundance of the round sardinella (Sardinella aurita, Valenciennes, 1847) in Moroccan waters (21°-26°N) using generalized additive models. The monthly variability of Sardinella aurita abundance in the south of Morocco is investigated using sea surface temperature (SST), upwelling index (UI) and chlorophyll-a (Chl-a) concentration from Global ARMOR3D L4 product, ESA Ocean Colour CCI and AquaMODIS satellite data between 2009 and 2016....

First record of five fish species from Réunion Island observed during the inventory of the Marine Natural Zones of Interest for Ecology, Flora and Fauna (ZNIEFF)

Mathieu Pinault, Julien Wickel, Thierry Mulochau, Jean-Benoît Nicet & Ronald Fricke
This paper reports the first record of five species of marine fishes from Reunion Island, identified during biodiversity surveys carried out within the framework of the Marine Natural Zones of Interest for Ecology, Flora and Fauna (ZNIEFF). These species: Fusigobius inframaculatus(Randall, 1994), Fusigobius neophytus(Günther, 1877), Samariscus triocellatusWoods, 1960, Trichonotus marleyi(Smith, 1936) and Zapogon evermanni(Jordan and Snyder, 1904) were all photographed within non-reef habitats, despite the sampling of many reef and non-reef habitats of the island...

What can goby otolith morphology tell us?

Christoph Gierl, Dorothea Liebl, Radek Šanda, Jasna Vukić, Hamid Reza Esmaeili & Bettina Reichenbacher
The taxonomic information inscribed in otoliths has been widely ignored in ichthyological research, especially in descriptions of new fish species. One reason for this is that otolith descriptions are per se qualitative, and only a few studies have presented quantitative data that can support assignments of otoliths to individual species or permit differentiation between higher taxonomic levels. On the other hand, in palaeontology, otoliths have been employed for the identification and taxonomic placement of fossil...

Selectivity on epilithic diatom consumption for two tropical sympatric gobies: Sicydium punctatum Perugia, 1986 and Sicydium plumieri (Bloch, 1786)

Dominique Monti, Estelle Lefrançois, Clara Lord, Jean-Michel Mortillaro, Pascal Jean Lopez & Philippe Keith
Rivers of the Caribbean islands harbour a freshwater fauna mainly constituted of migrant diadromous species. In these hyperturbulent ecosystems, the primary producers are mostly represented by a thin epilithic biofilm, mainly composed of diatoms. Comparison of the diatoms available from the environment with the ones consumed and located in the digestive tracts of two gobiid fish, Sicydium punctatum Perugia, 1896 and Sicydium plumieri (Bloch, 1786) were made at twelve sampling locations, located upstream or downstream...

A new species of Schismatogobius (Teleostei: Gobiidae) from Halmahera (Indonesia)

Philippe Keith, Hadi Dahruddin, Gino Limmon & Nicolas Hubert
A new species of Schismatogobius, a freshwater goby, is described from Halmahera (Indonesia). It differs from other species belonging to the genus by a high percentage of genetic divergence in partial COI gene (652 bp) and by several characters, including the number of pectoral fin rays, the pattern of the ventral surface of the head, the pectoral fin colour pattern and the jaw length/head length ratio of male and female.

Invasion hotspots and ecological saturation of streams across the Hawaiian archipelago

Kristine N. Moody, Roderick B. Gagne, Heidi Heim-Ballew, Fernando Alda, Ernie F. Hain, Peter J. Lisi, Ryan P. Walter, Glenn R. Higashi, J. Derek Hogan, Peter B. Mcintyre, James F. Gilliam & Michael J. Blum
Species introductions are a widely recognized threat to global freshwater biodiversity. The proliferation of non-native species can result in the loss of native species through direct and indirect interactions with predators, competitors, pathogens and parasites. Thus identifying invasion hotspots and understanding the capacity of vulnerable ecosystems to absorb new invasions is fundamental to conserving native biodiversity and preventing further introductions. Here, we assess whether endemic biodiversity, land-use and human population density predict the location of...

The largemouth black bass (Micropterus salmoides): first record in the Neretva River delta, Adriatic drainage system of Croatia

Jakov Dulčić, Branko Dragičević, Pero Ugarković & Pero Tutman
The 10th October 2016, a specimen of Micropterus salmoides was caught by trammel net in the Mala Neretva River (Adriatic drainage system of Croatia). This is the first occurrence of the Largemouth black bass in this river, and by the way, in the hydrographic drainage system to the Adriatic Sea.

New insights into the chromosomal differentiation patterns among cichlids from Africa and Madagascar

Catherine Ozouf-Costaz, Jean-Pierre Coutanceau, Céline Bonillo, Hervé Mercot, Yves Fermon & Chantal Guidi-Rontani
To increase understanding of the chromosomal diversity among cichlid species, karyotypes of 19 species of Cichlidae belonging to 15 genera (Paratilapia polleni, Chromidotilapia guntheri guntheri, Hemichromis fasciatus, Steatocranus irvinei, Stomatepia pindu, Altolamprologus compressiceps, Julidochromis transcriptus, Neolamprologus tetracanthus, N. brevis, Gnathochromis permaxillaris, Eretmodus cyanostictus, Astatoreochromis alluaudi, Haplochromis callipterus, H. paludinosus, Nimbochromis livingstonii, N. polystigma, Pseudocrenilabrus multicolor victoriae, P. philander and Ctenochromis horei) were investigated for the first time. In spite of the variation in the karyotypes...

Presence of larvae of lampreys, Lampetra sp. (Cephalaspidomorphi, Petromyzontiformes), in a French Catalan basin

Rémy Arsento, Kevin Richarte, André Fonteneau & Gaël P.J. Denys
Lamprey larvae were recently caught for the first time in a little French Catalan river, the Têt. The morphological and molecular identification demonstrated that these ammocoetes belong to the complex [Lampetra fluviatilis / Lampetra planeri]. As lampreys and their spawning beds are protected in France, this study will have an impact on the management of the Têt River.

Early development of the freshwater goby Orsinogobius croaticus endemic to Croatia and Bosnia-Herzegovina

Zanella Davor, Zoran Marčić, Marko Ćaleta, Ivana Buj, Snježana Zrnčić, Sven Horvatić & Perica Mustafić
Early development of the freshwater goby Orsinogobius croaticus (Mrakovčić, Kerovec, Mišetić & Schneider, 1996) endemic to Croatia and Bosnia-Herzegovina, reared under laboratory conditions, is described for the first time. Eggs were pear shaped, 1.4 × 1 mm in size. Hatching occurred 9 to 10 days after spawning, and larvae had a mean TL of 4.27 mm, with the caudal fin and all three pairs of otoliths developed and clearly visible at hatching. Hatched larvae showed...

Histological study of the jaw teeth in the Devonian actinopterygian †Cheirolepis canadensis (Whiteaves)

François J. Meunier, Olga Otero & Michel Laurin
†Cheirolepis bears two series of teeth on its jaws: one with sharp caniniform teeth and a second one with smaller teeth. The good preservation of the fossil material from Miguasha (Canada) has allowed a histological study of the various tissues of teeth and jaws. Caniniform teeth are composed of a core of orthodentine with an apical cap of acrodine. The walls of the pulp cavity show incipient folds located at the tooth base. These folds...

Observations on the diet of adult Oblada melanura (Sparidae) in the Strait of Sicily (central Mediterranean)

Luca Castriota, Valentina Esposito, Manuela Falautano, Pietro Battaglia & Franco Andaloro
The diet of adult saddled seabream Oblada melanura, collected mainly from artificial reefs off Sciacca (Strait of Sicily), was studied. A total of 60 specimens were caught by bottom longline and gillnet from March to October 2007 and their stomachs preserved. Food items were identified, counted and weighed. Frequency of occurrence (%F), abundance (%N) and weight (%W) percentages were used to calculate the index of relative importance (IRI) for each prey category. The analysis of...

On the occurrence of the Synodontis eupterus (Mochokidae) in the Adriatic drainage system of Croatia: a case of an introduced aquarium species and suggestions for alien species detection measures

Jakov Dulčić, Pero Tutman & Branko Dragičević
On November 8th 2017, a specimen of featherfin squeaker has been collected in the Mala Neretva River in Croatia (Adriatic drainage system). This is the first record of the featherfin squeaker, Synodontis eupterus, an ornamental fish species, in the freshwaters of Croatia. This case appeal for policies to prevent and detect accidental introductions.

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