Društvene mreže omogućuju rano otkrivanje nezavičajnih vrsta: prvi nalaz crvene hame Sciaenops ocellatus (Actinopterygii: Perciformes: Sciaenidae) u talijanskim vodama

The red drum Sciaenops ocellatus is a large demersal fish that represents one of the top predators in estuarine environments of its native range. This species is commonly reared in aquaculture facilities, and it has already been reported as non indigenous from several countries. Here we report its first sighting in Italian waters, as well as the second documented occurrence for the Mediterranean Sea. The individual was landed in southern Sicily by artisanal fishery and this unusual observation was immediately shared on Facebook. The importance of considering social networks as tools for NIS detection is briefly discussed in light of the recognized difficulties to properly track biological introductions in the marine environment.Crvena hama, Sciaenops ocellatus, je velika demersalna riba, koja je jedna od najvećih grabežljivaca u estuarijskim okruženjima njezinog prirodnog areala rasprostranjenja. Ova vrsta se obično uzgaja u akvakulturi, a već je zabilježena kao nezavičajna u nekoliko zemalja. U ovom radu utvrđeno je prvo viđenje ove vrste u talijanskim vodama, koje je ujedno druga dokumentirana pojava u Sredozemnom moru. Primjerak je ulovljen tijekom priobalnog ribolova u južnoj Siciliji. Ova neuobičajena pojava je odmah podijeljena na društvenoj mreži (Facebook). Važnost razmatranja društvenih mreža kao alata za otkrivanje nezavičajnih vrsta kratko je raspravljan u svjetlu prepoznatih poteškoća kako bi se pravilno pratili biološki unosi u morski okoliš

Ulovi manjića morskog, Molva molva (Linnaeus, 1758) se i dalje događaju u sjeverozapadnom dijelu Sredozemnog mora

The ling Molva molva is a widespread gadid in the Northeast Atlantic and one example of a poorly studied species of particular interest, being its distribution affected by climate warming. The ling supposedly occurs in the cold waters of the Northwestern Mediterranean Sea, where it used to be commonly fished, but to our best knowledge, records of M. molva after the 1990s are not available from the scientific literature. Here we report the recent capture of two individuals, one of them of considerable size, at 35 nautical miles off the coast of Castelló (Spain, NW Mediterranean).Manjić morski (Molva molva) je široko rasprostranjena vrsta u sjeveroistočnom Atlantiku i jedan od primjera slabo istraženih vrsta od posebnog interesa zbog njegove rasprostranjenosti koja je pod utjecajem zagrijavanja klime.Manjić morski se navodno pojavljuje u hladnim vodama sjeverozapadnog Sredozemnog mora, gdje je nekad bio uobičajeni ulov, ali prema našim saznanjima, zapisi o Molva molva nakon 1990-ih nisu dostupni iz znanstvene literature. U ovom radu navodimo nedavni ulov dvije jedinke, od kojih je jedna znatne veličine, na 35 nau-tičkih milja od obale Castelló (Španjolska)

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

5 pages, 3 figuresThe silver-cheeked toadfish Lagocephalus sceleratus (Gmelin, 1789)—an invasive toxic species well established in the eastern Mediterranean—is 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

Osservazioni sulla diversità della fauna ittica costiera in zone soggette a differenti regimi di tutela nell'area marina protetta dell'isola dell'Asinara = Observations on the diversity of coastal fish fauna in zones with different protection measures in the Asinara Island marine protected area

In order to assess the effects of protection, coastal fish assemblages from 3 zones with different protection levels were investigated by visual census in the Asinara Island MPA (North-western Sardinia). On the whole 45 species of Teleosts from 18 families were observed. Labrids and Sparids were more abundant in both species richness and density. Significant differences in densities of Diplodus sargus and D. vulgaris in the 3 zones, due to both the protection measures and the geographic exposure, were found

Prvi nalaz tupousne barakude Sphyraena chrysotaenia (Klunzinger, 1884) i indopacifičke vrste ježinca Diadema setosum (Leske, 1778) u morskom zaštićenom području otoka Zakintos, Jonsko more, Grčka

In 2021, three specimens of the Lessepsian yellowstripe barracuda Sphyraena chrysotaenia and eight specimens of the Indo-Pacific needle-spined sea urchin Diadema setosum were recorded along the coasts of Zakynthos Island, some within the Marine Protected Area.U 2021. godini, tri primjerka lesepsijske tupousne barakude Sphyraena chrysotaenia i osam primjeraka indo-pacifičke vrste ježinca Diadema setosum su pronađeni u području oko otoka Zakintos, neki unutar morskog zaštićenog područja

Notes on the reproductive condition of early colonizing S. Luridus in the Sicily Strait (Mediterranean Sea)

This paper summarizes some observations on gonad development and fecundity of the Lessepsian migrant Siganus luridus (Osteichthyes: Siganidae), recently settled in the islands of Malta and Linosa (Sicily strait, Mediterranean sea). The analysis of ovarian and testicular development showed that these early colonizers attain final gonad maturation and have the potential for successful reproduction.peer-reviewe

Video monitoring of Sparidae temporal rhythms: three-year study by OBSEA cabled observatory

The abundance and composition of fish assemblages varies at different temporal scales as a product of diel and annual rhythms. In this study, we used a video-wired observatory (OBSEA, www.obsea.es) to monitor annual rhythms in a coastal fish assemblage with a 3-year data set (2012-2014). The photographs were acquired at 30 min frequency. Five species of the family Sparidae were studied (i.e. Dentex dentex, Diplodus sargus, Diplodus vulgaris, Diplodus annularis and Diplodus puntazzo) together with water temperature and daylength. The results of the annual rhythmicity analysis indicated that most of the peaks of abundance occured in the autumn months. Results suggest differentially temporal use of the reproductive or trophic niche.Peer ReviewedPostprint (published version