1. Assessment of marine litter interaction in cetaceans stranded along the Italian coastline and the Adriatic SeaGuido Pietroluongo, Matteo Baini, Cristina Casalone, Giorgia Corazzola, Martina Đuras, Stefano Gavaudan, Federica Giorda, Tilen Genov, Silva Rubini, Sandro Mazzariol, 2025, original scientific article Keywords: marine litter, plastic ingestion, cetaceans, post-mortem, Italy, Adriatic sea, marine strategy framework directive, conservation
Published in RUP: 23.11.2025; Views: 866; Downloads: 4
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2. Underwater mapping in shallow coastal waters using MBES and photogrammetry : applications in archaeology and marine habitat monitoringSašo Poglajen, Mojca Poklar, 2025, published scientific conference contribution Abstract: This study explores the combined use of Multibeam Echosounder (MBES) and Structure-from-Motion (SfM) photogrammetry for high-resolution underwater mapping in shallow coastal environments. Focusing on Slovenian waters, the methodology was tested in two case studies: the Posidonia oceanica seagrass meadows near Koper, and the submerged archaeological site of Fizine. By integrating MBES and optical photogrammetry, the approach combined the spatial precision of sonar data with the detailed visual reconstruction capabilities of photogrammetry. In the case of Posidonia oceanica mapping, this integration enabled the detection of broader meadow structures through MBES, while photogrammetry—both underwater and aerial—allowed for the accurate delineation of meadow boundaries, especially in shallow or visually complex areas. The complementary strengths of the two methods improved the reliability of habitat classification across varying depths and environmental conditions. At the archaeological site of Fizine, MBES provided high- resolution bathymetry and structural layout of the submerged features, while underwater photogrammetry enhanced the spatial detail, capturing fine architectural elements such as stone alignments and basin walls that were not visible in acoustic data alone. Together, the methods produced comprehensive, georeferenced models well-suited for both habitat monitoring and cultural heritage documentation.
Keywords: underwater mapping, MBES, photogrammetry, marine archaeology, habitat mapping, Posidonia oceanica
Published in RUP: 15.09.2025; Views: 909; Downloads: 14
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3. Is net illumination a silver bullet for mitigating sea turtle bycatch in set net fisheries?Matic Jančič, Matteo Benussi, Sven Amančić, Peter Mackelworth, Draško Holcer, Bojan Lazar, 2025, original scientific article Abstract: Fisheries bycatch is the main threat to sea turtle populations in marine habitats in the Mediterranean Sea. Bycatch in set nets accounts for 30,000 catches yearly, which combined with mortality rates of up to 82.6 %, makes it the deadliest fishing gear in the region. The Adriatic Sea is one of the most important foraging and developmental habitats for loggerhead sea turtles (Caretta caretta) in the Mediterranean. Bycatch in the Adriatic small-scale set net fishery is estimated at over 8900 individuals per year placing its mitigation among international conservation priorities. Use of light emitting diodes (LED lights) of different wavelengths as bycatch deterrents was proposed as an effective conservation tool, reducing bycatch levels by up to 93 %. In the present study we: (i) quantified the effects of net illumination on loggerhead sea turtle bycatch rates and (ii) demonstrate the importance of regional validation of conservation tools effectiveness prior to their widespread adoption. We assessed the effects of green LED lights on sea turtle bycatch rates in 390 net pairs with total length of 1278 km monitored nets. We found no significant change in sea turtle bycatch rates as a result of net illumination. A significant decrease of 35 % of primary target catch was observed in illuminated trammel nets. Possible explanations include fluctuating turbidity and an adapted LED light attachment method. Observed sea turtle bycatch rates in unilluminated nets were up to 84 times lower than in comparable gears in Northern Adriatic Sea. Understanding the drivers behind the differing bycatch rates would be necessary before conservation decisions are made. Our study showed that the net illumination is not necessarily a silver bullet for bycatch mitigation in set nets globally, and that regional testing is a key requirement before its introduction in fisheries as a conservation tool.
Keywords: marine megafauna, Caretta caretta, small scale fisheries, bottom set nets, bycatch hotspot, bycatch mitigation, visual deterrents
Published in RUP: 06.08.2025; Views: 1121; Downloads: 14
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4. Physico-chemical and ecotoxicological evaluation of marine sediments quality in vicinity of communal outlet Cuvi : Rovinj coastal area, NE Adriatic sea, CroatiaIvan Radetić, 2024, master's thesis Keywords: marine sediments, wastewater treatment plant, contamination, sediment quality guidelines, chemical analyses, ecotoxicology
Published in RUP: 13.10.2024; Views: 3367; Downloads: 39
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6. Diatom diversity on the skin of frozen historic loggerhead sea turtle specimensLucija Kanjer, Roksana Majewska, Bart Van de Vijver, Romana Gračan, Bojan Lazar, Sunčica Bosak, 2020, original scientific article Keywords: epibionts, diatoms, marine turtles, Mediterranean
Published in RUP: 18.10.2021; Views: 3387; Downloads: 41
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7. Primerjava možnosti dodatnega izobraževanja in usposabljanja kadrov v izbranih marinah : magistrsko deloAlenka Lampe, 2018, master's thesis Keywords: izobraževanje, usposabljanje, motiviranje, znanje, podjetje, marine, Marina Portorož, Marine Nautica
Published in RUP: 19.03.2021; Views: 2855; Downloads: 58
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10. Light and shade in marine conservation across European and contiguous seasSimonetta Fraschetti, Carlo Pipitone, Antonios D. Mazaris, Gil Rilov, Fabio Badalamenti, Stanislao Bevilacqua, Joachim Claudet, Hrvoje Carić, Karsten Dahl, Bojan Lazar, 2018, original scientific article Keywords: European directives, Natura 2000 sites, marine protected areas, MSFD, MSP, fishery management, OECMs
Published in RUP: 09.08.2019; Views: 3907; Downloads: 170
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