Manuscrits sous presse

  • 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 de mise à jour: 24 mai 2018
    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 de mise à jour: 15 mai 2018
    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 de mise à jour: 15 mai 2018
    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 de mise à jour: 15 mai 2018
    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 de mise à jour: 15 mai 2018
    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.

  • Size estimation of Synbranchus marmoratus and Synbranchus madeirae based on isolated cranial and post-cranial bones

    • Prestes-Carneiro Gabriela
    • Béarez Philippe
    • Dillenseger Kareen
    • Yunoki Takayuki
    Date de mise à jour: 15 mai 2018
    Statut: Sous presse/In press

    Résumé

    The remains of South American swamp-eels are commonly recovered in pre-Columbian archaeological sites and swamp-eels are an important prey of piscivorous predators. In an attempt to assess the size classes of modern and archaeological fish from Bolivia, here we provide allometric regression equations for Synbranchus marmoratus and S. madeirae, resulting in total body length estimations on the basis of isolated skeletal elements. A total of 68 modern skeletons for Synbranchus marmoratus and 82 for Synbranchus madeirae were analysed. Measurements were taken on cranial (dentary, ectopterygoid, neurocranium, articular, hyomandibular, cleithrum) and post-cranial bones (first and second precaudal vertebrae). Our study shows that bone elements are highly correlated with total body lengths, which allows for a reliable reconstitution of Synbranchus size for paleontological, archaeological and dietary studies.

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

    • Béarez Philippe
    • Villaroel César
    Date de mise à jour: 15 mai 2018
    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.