90 research outputs found

    First record of Abudefduf cfr saxatilis Linnaeus, 1758 (Perciformes : Pomacentridae) from the Maltese Islands (Central Mediterranean)

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    The first sighting of Abudefduf individuals from Maltese (Central Mediterranean) coastal waters is reported. The individuals (6-7) were photographed in the field but were not collected. The pattern of body colouration of these individuals is consistent with that reported by most previous authors for A. saxatilis, marking the first record of this Atlantic species from Maltese waters.peer-reviewe

    Dodatni nalazi 拧arene ugorove majke Gaidropsarus granti(Actinopterygii: Gadiformes: Lotidae) u Jonskom moru

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    Two specimens of the Grant鈥檚 rockling Gaidropsarus granti (Regan, 1903) were caught in the Ionian Sea, just south of the Strait of Messina (Italy) in December 2016. Their body colouration pattern is consistent with that reported in the literature for this species. These specimens were described and illustrated.Dva primjerka Gaidropsarus granti (Regan, 1903) ulovljena su u Jonskom moru, ju啪no od Mesinskog tjesnaca (Italija) u prosincu 2016. Njihov uzorak obojenosti tijela je u skladu s onim iz literature za ovu vrstu. Ti su uzorci opisani i prikazani u radu

    Genetic confirmation of the first Mediterranean record of Holacanthus africanus Cadenat, 1951

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    The first Mediterranean record of the pomacanthid Holacanthus africanus, caught within the Maltese waters, was assigned based on morphological and meristic characters. However, molecular and genetic analyses are required to confirm the taxonomic determination and avoid misidentification given the abundance of closely-related Pomacanthidae species and the biogeographic significance of this record for the Mediterranean. At the species level, the analyzed specimens gave a 99.7% identity match with H. africanus. This study represents yet another example of molecular analyses supplementing the conclusions of conventional morphological identification exercises.peer-reviewe

    Prvi nalaz plavog raka Callinectes sapidus Rathbun, 1896 (Crustacea: Brachyura: Portunidae) u vodama pokrajine Abruzzi, srednji Jadran

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    For the first time, one female individual of blue crab Callinectes sapidus Rathbun, 1896, a species native to the western Atlantic coasts, is reported from Abruzzi waters (central Adriatic Sea). This species has widely invaded European Atlantic coasts and several areas of the Mediterranean, probably brought by ballast waters; yet, it has not settled in the study area.Po prvi put, jedinka 啪enke plavog raka Callinectes sapidus rathbun, 1896 vrste koja potje膷e sa zapadne obale atlantika, zabilje啪ena je u vodama pokrajine abruzzi (srednji Jadran). Ova vrsta je uvelike najezdila europske obale atlantika i nekoliko podru膷ja u mediteranu, done拧ena vjerojatno balastnim vodama; ipak, jo拧 se nije u potpunosti nastanila u istra啪ivanom podru膷ju

    First record of the fangtooth moray, Enchelycore anatina (Actinopterygii : Anguilliformes : Muraenidae), from Maltese waters, Central Mediterranean

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    The fangtooth moray, Enchelycore anatina (Lowe, 1838), native to the eastern Atlantic Ocean but also known from eastern sections of the Mediterranean, is recorded for the fi rst time from Maltese coastal waters in the central Mediterranean. This record is the westernmost one within the Mediterranean and the observed E. anatina individual co-occurred with an individual of Muraena helena Linnaeus, 1758.peer-reviewe

    Documenting the occurrence of the Lessepsian fish Stephanolepis diaspros within the Strait of Sicily, Central Mediterranean

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    The increasing occurrence of the reticulated leatherjacket, Stephanolepis diaspros (Tetraodontiformes, Monacanthidae), a Lessepsian migrant, within the Strait of Sicily, central Mediterranean, is documented in this study. This is done through the collation of records of the species from coastal waters off the Maltese Islands, collected between August 2007 and May 2011, and through the publication of the second validated record for the same species, collected on 10 December 2013 from the island of Lampedusa (Pelagian Islands).peer-reviewe

    New records of the silver-cheeked toadfish Lagocephalus sceleratus (Gmelin, 1789) in the Tyrrhenian and Ionian Seas: early detection and participatory monitoring in practice

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    5 pages, 3 figuresThe silver-cheeked toadfish Lagocephalus sceleratus (Gmelin, 1789)鈥攁n invasive toxic species well established in the eastern Mediterranean鈥攊s rapidly expanding through the western Basin and a public campaign was set to inform Italian citizens on the risks associated with its consumption. Both news media and local communities responded rapidly to the initiative generating an increasing flow of information. On 15 April 2016, a new capture of this species (off Briatico, Calabria, Italy at 25 m of depth), was promptly reported to the authors, representing the first documented record of L. sceleratus from the Tyrrhenian Sea. On 7 June 2016, a second specimen was captured at Montebello Ionico in Calabria. This case of early detection is here presented as a successful example of interplay among citizens, researchers, and policy makers: a powerful approach for monitoring the spread of invasive species and reducing their potential impacts through increasing awarenessPeer Reviewe

    Dieta del pez de San Francisco Synodus saurus (Linnaeus, 1758) (Pisces, Synodontidae) en el Mediterr谩neo central

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    The diet composition of the Atlantic lizardfish Synodus saurus, caught on sandy bottoms of the north-western coast of Sicily (southern Tyrrhenian Sea) is described. The stomachs of 224 specimens (from 73 to 280 mm TL) were collected between June 2005 and May 2006. The analysis of stomach contents showed that this species is almost exclusively piscivorous. Unlike other benthic predators of the study area, it mainly feeds on pelagic school-forming fish, such as Clupeidae, Engraulidae and Myctophidae and juveniles of Sparidae and Centracanthidae, and benthic prey play a secondary role. The diet of S. saurus is related to the seasonal availability of resources, depending on the occurrence of juveniles of several species and on the migration of pelagic fishes in the study area. There were no significant changes in prey items between predator length groups, but a positive, significant linear relationship between prey size and predator size was recorded.El presente trabajo ha estudiado la composici贸n de la dieta del pez de San Francisco Synodus saurus, pescado sobre fondos arenosos en la costa nor-occidental de Sicilia (Tirreno meridional). El an谩lisis del contenido estomacal de 224 individuos (entre 73 y 280 mm LT), pescados entre junio 2005 y mayo 2006, evidenci贸 que S. saurus es una especie casi exclusivamente icti贸faga. A diferencia de otros depredadores bent贸nicos, S. saurus se alimenta fundamentalmente de peces que forman bancos pel谩gicos como Clupeidae, Engraulidae y Myctophidae y de los juveniles de las familias Sparidae y Centracanthidae, mientras las presas bent贸nicas resultaron secundarias. S. saurus exhibi贸 una estrategia alimentaria relacionada con la disponibilidad estacional de recursos, dependiendo de la ocurrencia de juveniles de varias especies y de la migraci贸n de peces pel谩gicos en el 谩rea de estudio. No hubo cambio significativo de presas entre grupos de tallas pero se evidenci贸 una relacci贸n positiva, lineal y estad铆sticamente significativa entre el tama帽o de la presa y del depredador

    Assessing worth of marine protected areas for the protection of threatened biodiversity using IUCN Red List and Red List Index. A pilot study in six mediterranean areas

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    Abstract The Mediterranean marine region is considered one of the world's biodiversity hotspots for conservation priorities due the high occurrence of rare and threatened species, endemism and high species richness. However, several pressure such as losses and alterations of habitats are ongoing and in order to increase conservation in this sea region, many marine protected areas were established, including Natura 2000 sites. The latter are areas designated under the Habitat and Bird Directives for the conservation of species in need of strict protection, so that they can reach a favourable conservation status. Species conservation status is also assessed through the IUCN (International Union for Conservation of Nature) Red List of Threatened Species. The aim of our study was to test whether IUCN Red List and the related Red List Index RLI (which aggregates in a single value all the information on conservation status of a particular set of species) can be used as a metrics to characterize MPAs, and orienting, consequently, local marine conservation policies. A pilot study was undertaken in the six Sicilian MPAs (Marine Protected Areas) and results highlighted that Egadi Island has a low RLI value (meaning that the MPA hosts many species with a threatened status) while the Capo Gallo MPA, at the opposite, as an high RLI value (i.e.less threatened species); the other four MPAs. Egadi, Pelagie, and Ustica showed similar distribution frequencies of Red List categories having similar RLI values. Biological resource use, natural system modifications, invasive species, and pollution all account for 90% of assessed threats. Outcomes of our study showed that IUCN indicators should be considered as a tool to: assess the conservation status of set of species in protected areas; drive prioritization in the decision process in order to support an effective management conservation plan; designate new MPAs

    Yet another angelfish species for the Mediterranean - the first record of Holacanthus africanus Cadenat, 1951 from Maltese waters, Central Mediterranean

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    The first documented record of the Guinea angelfish, Holacanthus africanus, for the Mediterranean is hereby reported, through the capture of two individuals within Maltese coastal waters. The fish were submitted as a contribution to the Spot the Alien Fish citizen science campaign. Considerations are made on the possible introduction pathway used by the species to reach these waters, including the aquarium trade or association with a towed oil platform.peer-reviewe
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