831. New evidence of the occurrence of Knoutsodonta Pictoni (Nudibranchia, Onchidorididae) in the Northern AdriaticAna Fortič, Domen Trkov, Lovrenc Lipej, Marco Fantin, Saul Ciriaco, 2021, original scientific article Abstract: The authors present new data on the recently described nudibranch Knoutsodonta pictoni Furfaro & Trainito, 2017 in the Gulf of Trieste (northern Adriatic Sea). We hereby present the first record of this species in Slovenian territorial waters. A total of 22 specimens of K. pictoni were recorded by diving in the period from 2017 to 2021 at five localities in the Gulf of Trieste. All specimens were found in precoralligenous habitats in the depth range of 5 to 9 m, feeding on the encrusting bryozoan Reptadeonella violacea (Johnston, 1847). Numerous finds indicate that this only recently described and therefore little known nudibranch is much less rare than previously thought.
Published in DiRROS: 01.08.2024; Views: 295; Downloads: 267
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832. After more than forty-five years a new finding of Cystoseira foeniculacea f. latiramosa in the coastal sea of SloveniaMartina Orlando-Bonaca, Domen Trkov, 2020, original scientific article Abstract: Canopy-forming macroalgae, especially Cystoseira sensu lato species, create so-called brown algal forests, which are among the most productive habitats in shallow coastal waters. In the Mediterranean Sea these species have been disappearing over the past two decades due to multiple anthropogenic pressures, and are gradually being replaced by smaller and persistent turf-forming algae. A decrease in the number of species and in the cover of canopy-forming taxa (especially Cystoseira s.l. spp.) has been detected over the last ten years also in Slovenian coastal waters. This paper reports a recent finding of Cystoseira foeniculacea f. latiramosa, which was missing from Slovenian marine waters for more than four decades.
Published in DiRROS: 01.08.2024; Views: 471; Downloads: 222
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833. Marine cryptobenthic fish fauna of Slovenia (northern Adriatic Sea)Domen Trkov, Borut Mavrič, Martina Orlando-Bonaca, Lovrenc Lipej, 2019, original scientific article Abstract: Cryptobenthic fish fauna constitute one of the less studied fish groups in the Adriatic Sea. As regards Slovenian coastal waters, only few papers dealing with cryptobenthic fish assemblages have been published to date. All the available data about cryptobenthic fish species in the Slovenian sea are presented in this paper, with particular interest in their geographic and depth distribution. Altogether 798 specimens of 11 different species were collected. Thorogobius macrolepis and Chromogobius quadrivittatus were found in Slovenian territorial waters for the first time only recently. The majority of fishes have been recorded using new techniques, associated with SCUBA diving equipment and the use of the narcotic Quinaldine.
Keywords: cryptobenthic habitats, fish assamblage, coastal waters, northern Adriatic Sea
Published in DiRROS: 31.07.2024; Views: 287; Downloads: 199
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834. Occurrence of giant tun, Tonna galea (Linnaeus, 1758) (Gastropoda: Tonnidae) in the marine waters off Slovenia (northern Adriatic Sea)Manja Rogelja, Lovrenc Lipej, 2019, original scientific article Abstract: On 1st December 2018 a fisherman caught a specimen of the giant tun Tonna galea (Linnaeus, 1758) in the bottom trammel net for flounders, approximately 1 Nm outside the town of Izola. The net was placed on a muddy bottom at 20 m of depth. This is the second record of T. galea in the Slovenian waters (Gulf of Trieste, northern Adriatic Sea). Another specimen (the first one) was previously reported in October 2015 in the waters off Piran. By including T. galea in the checklist of Slovenian marine malacofauna, at least 370 gastropod species were up to date recorded in the Slovenian part of the Adriatic Sea.
Keywords: giant tun, marine malacofauna, Gulf of Trieste, northern Adriatic Sea
Published in DiRROS: 31.07.2024; Views: 310; Downloads: 299
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835. Biometry and population gender structure of three crab species (Crustacea: Decapoda) from sandy bottom in the northern Adriatic SeaMona Rezaei, Al Vrezec, Borut Mavrič, Lovrenc Lipej, 2019, original scientific article Abstract: The aim of the study was to investigate the distribution and population structure of three species of crabs (Decapoda: Crustacea), Medorippe lanata, Liocarcinus depurator and Liocarcinus vernalis for their biometric relationships. A total of 1100 specimens of three species were caught from waters off the northern Adriatic Sea in December 2013. Biometric relationships and condition factor (Fulton’s coefficient index) were measured for all the studied species. Size dimorphism was also observed in M. lanata with females showing significantly larger carapace size than males without significant difference in wet weight. The studied species did not differ significantly in the results of the condition index.
Keywords: biometry, condition factor, Adriatic Sea
Published in DiRROS: 31.07.2024; Views: 259; Downloads: 199
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836. Hippolyte prideauxiana Leach, 1817 : first record for the northern Adriatic and observations on mimetic colourationRoland Melzer, Martin Heß, Manuel A. Staggl, Tihomir Makovec, Borut Mavrič, 2019, original scientific article Abstract: We present the first record of Hippolyte prideauxiana Leach, 1816 for the northern Adriatic and the second record for the Adriatic Sea based on seven specimens we found during our faunistic inventory of the marine protected area of the Brijuni National Park, Croatia. Moreover, we give the first description of the appearance of 7 mm-juveniles and discuss the stage-specific traits of the crinoid mimesis of this species.
Keywords: colouration, mimesis, Adriatic Sea
Published in DiRROS: 31.07.2024; Views: 337; Downloads: 216
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837. First record of Sergeant major, Abudefduf saxatilis (Linnaeus, 1758) in the Adriatic SeaLovrenc Lipej, Domen Trkov, Domen Stanič, Sara Cernich, Saul Ciriaco, 2019, original scientific article Abstract: A specimen of Segeant major Abudefduf saxatilis (Linnaeus, 1758) was observed in a shallow rocky area for several weeks in August and September 2019 at Punta Sottile, in waters off Muggia (Gulf of Trieste). The specimen probably entered the Strait of Gibraltar and arrived at northernmost limits of the Adriatic Sea. This is the first record for this species in the Gulf of Trieste and also the Adriatic Sea.
Keywords: Sergeant major, damselfish, first record, Atlantic influx, Gulf of Trieste
Published in DiRROS: 31.07.2024; Views: 349; Downloads: 211
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838. First record of Flabelliderma cinari Karhan, Simboura & Salazar-Vallejo, 2012 (Polychaeta: Flabelligeridae) from the Adriatic SeaValentina Pitacco, Űnsal Karhan, 2019, original scientific article Abstract: Eleven specimens of the flabelligerid polychaete Flabelliderma cinari Karhan, Simboura & Salazar-Vallejo, 2012 were found in colonies of the Mediterranean stony coral Cladocora caespitosa (Linnaeus, 1767), in the northern Adriatic Sea. This finding represents the first record of the species outside its type range and provides additional information on its area of distribution and potential ecological role
Keywords: symbiosis, northern Adriatic
Published in DiRROS: 31.07.2024; Views: 254; Downloads: 276
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839. Assessment of bryozoan xenodiversity in the Slovenian coastal seaAna Fortič, Domen Trkov, Borut Mavrič, Lovrenc Lipej, 2019, original scientific article Abstract: The phylum Bryozoa is one of the less studied macroinvertebrate groups in the Slovenian coastal sea. However, these animals play an important role in marine coastal ecosystems, especially as bioconstructors and filter feeders. Non indigenous species represent five to ten percent of all Mediterranean bryozoan species. In this paper, we present an updated list of non-indigenous or cryptogenic bryozoan species recorded in Slovenia. The list includes six species: Amathia verticillata, Bugula neritina s.l., Celleporaria brunnea, Tricellaria inopinata, Watersipora arcuata and Watersipora subtorquata with comments on their morphology, ecology and distribution in the Slovenian coastal sea. Introduction vectors and possible dispersal mechanisms are discussed, as well as methodological approaches and problematic areas as regards the study of non-indigenous bryozoans. Three species reported here, A. verticillata, C. brunnea and W. subtorquata, represent the first confirmed record from the Slovenian Sea
Keywords: non-indigenous species, Bryozoa, northern Adriatic Sea, harbour habitats, mussel farms, experimental plates
Published in DiRROS: 31.07.2024; Views: 276; Downloads: 216
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840. Impact of the port of Koper on Cymodocea nodosa meadowMartina Orlando-Bonaca, Janja Francé, Borut Mavrič, Lovrenc Lipej, 2019, original scientific article Abstract: In the Mediterranean Sea Cymodocea nodosa is considered a valid indicator of environmental changes, due to its extensive distribution, sensitivity to different pressures, and measurability of species responses to those stressors. Navigation routes are recognized among the main pressures on the status of C. nodosa meadows in the Gulf of Trieste, related to a high resuspension of sediments and, in consequence, high water turbidity and reduced light levels. The MediSkew index was applied to samples collected in the C. nodosa meadow growing near the Port of Koper, and the ecological status was evaluated. The results were compared to those obtained for the C. nodosa samples from the reference site in the Gulf of Trieste, the Strunjan Nature Reserve.
Keywords: MediSkew index, leaf lengths, Port of Koper, northern Adriatic Sea
Published in DiRROS: 31.07.2024; Views: 238; Downloads: 211
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