Manuscrits sous presse

  • S7 characterization of Western European pikes Esox spp. (Actinopterygii, Esociformes)

    • Denys Gaël
    • Lauga Théo
    • Delmastro Giovanni
    • Dettai Agnes
    Date d'acceptation: 30 août 2018
    Statut: Sous presse/In press

    Résumé

    The comparison of a 1635 bp fragment of the first intron of the S7 ribosomal protein coding gene, a commonly used phylogenetic marker, for specimens from the three European pike species Esox aquitanicus, Esox cisalpinus and Esox lucius highlights diagnostic sites and indels constituting molecular synapomorphies. Both the sequence alignment and the phylogenetic tree discriminate these three species, even with a short sequence fragment. Three Esox lucius haplogroups can be separated. These haplogroups might correspond to the evolutionary lineages highlighted by previous mitochondrial studies. Finally this study confirms hybridization between Esox aquitanicus and Esox lucius, but also the absence of geographical structure between Esox lucius haplogroups in France following restocking from East European piscicultures. The S7 marker is excellent for molecular identification, and could be used for environmental DNA.

  • A new species and new records of goatfishes of the genus Parupeneus (Mullidae) from the Indian Ocean, with updated occurrence information for P. jansenii in the Western Pacific

    • Uiblein Franz
    • Hoang Tuan A.
    • Alama Ulysses
    • Causse Romain
    • Chacate Osvaldo E.
    • Fahmi
    • Garibay Soledad
    • Matiku Patroba
    Date d'acceptation: 24 août 2018
    Statut: Sous presse/In press

    Résumé

    Goatfishes of the genus Parupeneus (Mullidae), from several areas and countries of the Indo-West Pacific, were studied, focusing on species characterized by a symmetrically rounded rear end of the maxilla, which belong to the so-called heptacanthus group. We examined 62 meristic and morphometric characters and colour patterns from 180 specimens from 11 Parupeneus species, using a comprehensive alpha-taxonomy approach. When possible, the data for species represented by wider size ranges were split into two size classes (small-sized fish, < 110 mm SL, vs. large-sized fish ³ 110 mm SL) to account for allometric changes in body form. A new species, P. inayatae Uiblein & Fahmi is described, based on a specimen collected in SW Lombok, Indonesia, and new records for four species are reported from the Indian Ocean: Parupeneus fraserorum new for Mozambique, P. jansenii new for Myanmar and the NE Indian Ocean, P. nansen new for Tanzania, and P. procerigena new for the Nazareth Bank and Mauritus (Cargados Carajos Bank), Western Indian Ocean (WIO). The record of P. jansenii for Myanmar was compared in detail to 37 conspecific specimens from the entire distribution range (western Indonesia to Japan and Vietnam to NE Australia). The latter revealed two new Pacific records for the Central Philippines and for Shikoku Island, Japan (northernmost record of the species). For each of the eight heptacanthus-group species, diagnoses are provided along with remarks on intraspecific size- and/or population-related variation and/or other noteworthy observations. The new species can be distinguished from all other 32 congeners as follows: dorsal head margin in front of eyes concave shaped; posterior maxilla margin evenly, symmetrically rounded; body, head, and caudal peduncle moderately deep; pectoral and pelvic fins subequal in length; and caudal peduncle clearly deeper than 9.5 % SL; in life a dusky spot on lateral line below interdorsal space, followed posteriorly by a bright orange blotch. Detailed comparisons among all eight heptacanthus-group species and with three other similar and/or co-occurring congeners revealed considerable similarity between two species pairs, P. jansenii (Eastern Indian Ocean and Western Pacific) and P. nansen (WIO), and P. fraserorum and P. procerigena (both from the WIO). The need to further intensify taxonomic studies and accompanying fisheries-biology and ecological studies of goatfishes in the large realm of the Indo-West Pacific is emphasized.

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

    • Castriota Luca
    • Esposito Valentina
    • Falautano Manuela
    • Battaglia Pietro
    • Andaloro Franco
    Date d'acceptation: 30 août 2018
    Statut: Sous presse/In press

    Résumé

    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 prey items led to the identification of 72 taxa, belonging to 23 main categories, with teleosts emerging as the dominant group, followed by polychaetes, crustaceans and insects. A generalist feeding strategy is suggested by the relationship found between prey frequency of occurrence and prey-specific abundance, although specialization of individual predators for some prey items was also highlighted.

  • Northernmost record and new biological data of the Phaeton dragonet Synchiropus phaeton (Callionymiformes: Callionymidae) in the eastern Atlantic

    • Rafael Bañón
    • Xexús Morales
    • Alexandre Alonso-Fernández
    • David Barros-García
    • Alejandro de Carlos
    Date d'acceptation:
    Statut: Sous presse/In press

    Résumé

    An actively spawning female specimen of the Phaeton dragonet Synchiropus phaeton (Günther, 1861) of 22 cm TL was recorded with bottom trawl in Atlantic Portuguese waters. The identification of the specimen is confirmed by morphometric and meristic parameters as well as DNA barcoding. This northernmost record from the Eastern Atlantic provides new maximum length reference for the species. The histological examination of reproductive tissue in S. phaeton reveals that this species is a batch spawner with an asynchronous ovarian development organization.

  • 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

    • Dulcic Jakov
    • Tutman Pero
    • Dragicevic Branko
    Date d'acceptation:
    Statut: Sous presse/In press

    Résumé

    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.

  • Potentially unsustainable fisheries of a critically-endangered pelagic shark species: the case of the blue shark (Prionace glauca) in the Western Mediterranean Sea

    • Sebastián Biton-Porsmoguer
    • Josep Lloret
    Date d'acceptation:
    Statut: Sous presse/In press

    Résumé

    The blue shark (Prionace glauca) is a pelagic, highly migratory shark commonly considered to be a by-catch species of small-scale pelagic longline fisheries. It has been listed by the IUCN as “critically endangered” in the Mediterranean Sea since 2016, but no measure has been taken so far to control its exploitation there. This study analyses the trends in this fishery over recent years in Spanish Mediterranean waters. The results show that blue sharks are now facing considerable fishing pressure, particularly from the long line industrial fleet based in the Andalusian region. Indeed, the results indicate that the blue shark can no longer be considered as a by-catch species and has now become a target species for these fishermen. We suggest measures should be taken urgently to regulate this fishery and that further studies be carried out to determine whether or not this species should be fished any longer in this area.

  • Range extension of Periophthalmodon septemradiatus (Gobiidae) in southern Sumatra, Indonesia

    • Iqbal Muhammad
    • Halim Amran
    • Adriani Desra
    • Pormansyah
    • Saputra Rio Firman
    Date d'acceptation:
    Statut: Sous presse/In press

    Résumé

    A specimen of Periophthalmodon septemradiatus was caught and photographed on 16 September 2017 in the Musi River, South Sumatra Province, Indonesia. This specimen represents range extension of P. septemradiatus for mainland Sumatra, which extends the species range 450 km south of its currently known distribution.

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

    • Iqbal Muhammad
    • Setiawan Doni
    • Setiawan Arum
    • Kadarisman Riza
    • Yustian Indra
    Date d'acceptation:
    Statut: Sous presse/In press

    Résumé

    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 evanida in Indonesia, and this observation constitutes a first record for the country.

  • First record of Pseudocaranx chilensis (Carangidae) from the continental coast of north-central Chile

    • Béarez Philippe
    • Villaroel César
    Date d'acceptation:
    Statut: Sous presse/In press

    Résumé

    The Juan Fernández trevally Pseudocaranx chilensis is a carangid found in the coastal waters of the southeastern Pacific oceanic islands, west of mainland Chile. This species is considered endemic to the Juan Fernández and Desventuradas Islands; however, this study presents a new record of this species off Chañaral Island, on the north-central coast of Chile, an extension of 850 km to the east of its usual distribution range. The underwater sighting of several vagrant individuals might result from a migration of fish larvae from the Juan Fernández Islands.