Prvi podaci o staništu, prehrani i dužinsko-masenom odnosu vrste Gobius incognitus Kovačić & Šanda, 2016 (Pisces: Gobiidae)

In this work, we present first data on biological and ecological aspects of Gobius incognitus from specimens from the Ionian Sea (central Mediterranean Sea). In particular, we provided first data on habitat preference, diet and length-weight relationship of G. incognitus on material with confirmed species identity. The species preferred “mixed bottom” (sand and rocks), where it reached relatively high abundances. The diet analysis showed that G. incognitus is a generalist and opportunistic feeder. However, small benthic crustaceans were the most important prey group. The mean total length of specimens was 6.72 ± 1.85 cm and the growth was positive allometric.U ovom radu iznose se prvi podatci o biološkim i ekološkim značajkama vrste Gobius incognitus na temelju uzoraka iz Jonskog mora (središnji dio Sredozemnog mora). Posebno se ističu podatci o staništu, prehrani i dužnsko - masenom odnosu. Vrsta Gobius incognituspreferirala je „miješano dno“ (pijesak i stijene), gdje je dostigla relativno veliku brojnost. Analiza prehrane pokazala je da G. incognitus slijedi oportunistički način prehrane. Međutim, mali bentoski rakovi bili su najvažniji plijen. Srednja ukupna dužina iznosila je 6,72 ± 1,85 cm, a rast je bio alometrijski pozitivan

Novi zapisi dviju bitnica s jugoistočne obale Sicilije (Jonsko more) i razmatranja o njihovoj prisutnosti i obilju

New records of Pseudocaranx dentex (Bloch & Schneider, 1801) and Seriola fasciata (Bloch, 1793) are reported from the Mediterranean Sea. During the period 2013-2017, we have collected several records of both species from the south-east coast of Sicily (Ionian Sea). On the basis of our and published data, we can consider S. fasciata as a relatively common species in the area, commonly caught with purse seine around FADs in summer and autumn; while, P. dentex remains basically a rare species, occasionally caught with trammel nets or gillnets. This work represents the first well-documented records of both carangid species in the south-east coast of Sicily.U ovom radu se iznosi novi nalaz šnjurka Pseudocaranx dentex (Bloch & Schneider, 1801) i Seriola fasciata (Bloch, 1793) u Sredozemnom moru. Tijekom razdoblja 2013.-2017. autori su za obje vrste prikupili nekoliko zapisa o nalazu s jugoistočne obale Sicilije (Jonsko more). Na temelju autorskih i drugih objavljenih podataka, S. fasciata može se smatrati relativno čestom vrstom na tom području, obično uhvaćenom mrežom plivaricom oko FAD-ova u ljeto i jesen; dok je P. dentex rijetka vrsta povremeno ulovljena trostrukim ili jednostrukim mrežama stajaćicama. U ovom se radu iznose dokumentirani nalazi obje bitnice na jugoistočnoj obali Sicilije

Prvi potvrđeni zapis o vrsti Pomatoschistus microps(Krøyer,1838) (Pisus: Gobiidae) iz Jonskog mora s bilješkama o staništu i rasprostranjenosti

Two specimens of the common goby (Pomatoschistus microps) were observed in the estuarine environment of the River Asinaro (Sicily). These records represent the easternmost and southernmost observations of the species in the Mediterranean Sea, and the first confirmed record in the Ionian Sea (central Mediterranean Sea). We also provide notes about its habitat and current distribution in the Mediterranean Sea.Dvije jedinke vrste Pomatoschistus microps zabilježene su u okolišu ušća rijeke Asinaro (Sicilija).Ovaj nalaz predstavlja najistočniji i najjužniji nalaz vrste u Sredozemnom moru i prvi potvrđeni nalaz u Jonskom moru. Također se navodi njegovo stanište kao i trenutna rasprostranjenost u Sre-dozemnom moru

Measurement of inclusive jet charged-particle fragmentation functions in Pb plus Pb collisions at root S-NN=2.76 TeV with the ATLAS detector

© 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/license/by/3.0/). Funded by SCOAP3

Invasive Species Control: Predation on the Alien Crab Percnon gibbesi (H. Milne Edwards, 1853) (Malacostraca: Percnidae) by the Rock Goby, Gobius paganellus Linnaeus, 1758 (Actinopterygii: Gobiidae)

Invasive alien species (IAS) are one of the greatest causes of native species extinction. Indeed, they represent a global threat for biodiversity and can also affect the economy and human health. The colonization success of IAS is presumably not only due to their biological and ecological characteristics, but also to the lack of predators and/or parasites in the invaded new areas. In the present work, we demonstrate evidence of predation of the invasive alien crab Percnon gibbesi (H. Milne Edwards, 1853) by the Rock Goby Gobius paganellus Linnaeus, 1758. The diet of G. paganellus was studied analyzing the stomach content of 162 specimens collected in the central Mediterranean Sea. The results obtained from the calculation of the diet indices, namely, frequency of occurrence (%F), percentage weight (%W), percentage abundance (%N), and the Index of Relative Importance (%IRI), showed that small benthic crustaceans were the main prey types. Additionally, these indices and the Levins’ index (Bi) clearly indicated that the invasive crab P. gibbesi was by far the most abundant prey type in the diet of G. paganellus. The relevance of this predator–prey interaction and the role of native species for the biological control of invasive ones are discussed. We also provide a general view on the diet of G. paganellus and other biological and ecological aspects of specimens studied from the central Mediterranean Sea

Aggiornamento dei docenti e innovazione delle metodologie didattiche nell’Ateneo di Catania

No abstract available

Editorial: Elasmobranch - fisheries interactions in the Mediterranean

3 pagesThe intricate balance of marine ecosystems relies heavily on the presence of apex predators, and among them, elasmobranchs stand out as formidable top predators. These enigmatic creatures play a pivotal role in maintaining the health and equilibrium of marine environments (Myers et al., 2007). However, despite their ecological significance, elasmobranch populations are experiencing a concerning global decline, primarily attributed to the intersection of anthropogenic disturbances and shifting environmental conditions. A particular impact is due do different fishing activities, not only the “industrial” ones, but also artisanal fisheries was demonstrated to negatively affect elasmobranchs populations (Tiralongo et al., 2018; Mancusi et al., 2020). At the forefront of these threats is the pervasive impact of fishing activities, posing a substantial challenge to the conservation of elasmobranchs worldwide. Overfishing, coupled with unintended interactions in non-targeted fisheries, has emerged as a significant driver behind the diminishing populations of these iconic marine species. The repercussions of these trends are further exacerbated by the escalating demands on global fisheries and the concurrent depletion of fish stocks, foreshadowing an ominous trajectory for elasmobranchs in the decades to come (Pacuoreau et al., 2021). [...]With the institutional support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S)Peer reviewe

Il Sistema di Formazione e Qualificazione della Docenza nell\u2019Ateneo di Catania

Il contributo descrive il programma di formazione e qualificazione della docenza nell\u2019Ateneo di Catania e presenta i risultati di valutazione dello stesso