Records of Invasive European Catfish <i>Silurus Glanis</i> (Linnaeus, 1758) in the Neretva River Delta (Croatia): Social Media as Information Source

Tutman, Pero; Dragičević, Branko; Dulčić, Jakov; Bukvić, Višnja; Bekh, Vitaly; Glamuzina, Branko

doi:10.2478/cjf-2021-0005

Cited by 5 publications

(5 citation statements)

References 22 publications

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“…One individual had developed gonads (Figure 1 J). Unfortunately, none of the specimens were able to be preserved for further tissue or morphological examination, but typical morphological features allowed accurate identifi cation from a single photo when the specimen was not preserved [17].…”

Section: Resultsmentioning

confidence: 99%

Unusual fi ndings of soft mouth trout Salmo obtusirostris (Actinopteri: Salmonidae) in the marine environment along the middle Eastern Adriatic coast as a consequence of extreme weather events

Tutman¹,

Kennedy²,

Matić‐Skoko³

et al. 2023

Naše more

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The discovery of individuals of softmouth trout Salmo obtusirostris in the marine environment has been recorded several times in the period from 2015 to the present day in the wider area of the Neretva River delta and southern Adriatic coast. Although this phenomenon appears to be happening more frequently along the Adriatic coast, scientific reports regarding family Salmonidae species found in the marine environment are still very rare in the eastern Adriatic, especially for the softmouth trout. The findings reported here represent the first marine records of this endemic freshwater species. An increasing frequency of these findings may indicate that a higher number of individuals are ending up in the coastal environment during heavy storm events or other unusual hydrologic occurrence. Extreme weather conditions have become more frequent in recent years, mainly as a result of climate change and have led to unexpected phenomena and impacts on nature. The long-term effects on fish and community structure of rivers flowing into the sea require further research, as these weather-induced situations can be expected to become more common. Further investigation into the physiological costs and population consequences of these unusual ecological findings is warranted.

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Section: Resultsmentioning

confidence: 99%

Unusual fi ndings of soft mouth trout Salmo obtusirostris (Actinopteri: Salmonidae) in the marine environment along the middle Eastern Adriatic coast as a consequence of extreme weather events

Tutman¹,

Kennedy²,

Matić‐Skoko³

et al. 2023

Naše more

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“…However, the new reports and persistence of freshwater-dependent species in Neretva River delta (DULČIĆ et al, 2017, TUTMAN et al, 2021 suggests that there may be a time lag in the response of freshwater-dependent species to increasing salinities. Salinization is a widespread phenomenon in the environment, which threatens many taxa (CALVACHE & PULIDO-BOSCH, 2017, ABDUL-RAZAK & INTISAR, 2019.…”

Section: Resultsmentioning

confidence: 99%

“…Due to lack of monitoring programmes in the area which could provide data collected in situ and in such a way shed more light on the extent of penetration of marine species in the area, data on these occurrences were collected mostly through direct contacts with local citizens and by searching social networking sites and internet news portals for reports on unusual occurrences. Such way of data collection has already proven to be valuable in the early detection of alien species in the area (DULČIĆ et al, 2018, TUTMAN et al, 2021.…”

Section: Introductionmentioning

confidence: 99%

Unusual records of marine organisms in the Neretva River (Croatia and Bosnia and Herzegovina)

Tutman

Vekić²,

Bukvić

et al. 2021

Acta Adriat. (Online)

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This paper presents a review of the unusual occurrences of various marine species found upstream in the Neretva River and its wider delta zone in the last two decades. The occurrences of at least eight different marine species were reported by local fishermen, representing very rare records of these species in the upstream areas of rivers. Although some of these species generally inhabit both saltwater and brackish waters, their occurrences high upstream are probably the consequence of changes in hydrological conditions in Neretva River. Namely, more intense saltwater intrusion into the river observed in the last two decades provides suitable conditions for mass penetration of euryhaline organisms high into the Neretva River. In this biodiversity rich area which hosts a significant number of endemic species, such phenomena can threaten the local freshwater communities.

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“…In addition to these measures, several local control campaigns have been carried out and are still ongoing, but the abundance of S. glanis remains unaffected (e.g., Milardi et al 2022) and it keeps expanding its invasive range (e.g. De Santis and Volta 2021;Tutman et al 2021;Mancini et al 2022;Nyqvist et al 2022;Gkenas et al 2023). This is probably due to multiple reasons such as inadequate containment efforts, lack of awareness and compliance with current management policies by anglers, and lack of law enforcement.…”

Section: Introductionmentioning

confidence: 99%

LIFE PREDATOR: Prevent, detect, combat the spread of Silurus glanis in south European lakes to protect biodiversity

De Santis,

Brignone,

Čech

et al. 2024

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The management of Invasive Alien Species (IAS) is often hindered by ecological, social and economic factors, resulting in inadequate biodiversity protection and inefficient use of public money. A clear example of such inefficient management in aquatic ecosystems is the European catfish Silurus glanis L. in southern Europe. Native to central Eurasia, S. glanis is an emblematic and controversial freshwater fish, being the subject of extensive and profitable trophy angling in central Europe and of commercial fishing in eastern Europe. Concurrently, in western and southern Europe where it was introduced in the XIX century, S. glanis is considered a problematic invader. The lack of comprehensive information on S. glanis invasive populations has limited effective management, which is critical to successfully control the spread and minimize negative impacts on native ecosystems and species. LIFE PREDATOR, started in September 2022 with a budget of € 2.85 million and a consortium of six partners from three countries, aims at developing a multidisciplinary and transnational approach to control established populations of S. glanis, and prevent further spreading and future introductions in southern European lakes and reservoirs. The project will develop and test an early warning system based on eDNA and citizen science and identify the most effective and selective capture techniques to reduce the abundance of catfish, particularly in Natura 2000 lakes, actively involving anglers and professional fishermen on this. Massive raising awareness campaigns will be conducted targeting anglers but also the general public, and protocols and best practices will be transferred to management authorities. For the long-term sustainability of the project, a South European Management Group will be created. Additionally, in northern Italy, where the catfish invasion is more advanced, a local circular economy will be implemented, involving the increase in fishing pressure by encouraging catfish consumption as food.

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Records of Invasive European Catfish Silurus Glanis (Linnaeus, 1758) in the Neretva River Delta (Croatia): Social Media as Information Source

Cited by 5 publications

References 22 publications

Unusual fi ndings of soft mouth trout Salmo obtusirostris (Actinopteri: Salmonidae) in the marine environment along the middle Eastern Adriatic coast as a consequence of extreme weather events

Unusual fi ndings of soft mouth trout Salmo obtusirostris (Actinopteri: Salmonidae) in the marine environment along the middle Eastern Adriatic coast as a consequence of extreme weather events

Unusual records of marine organisms in the Neretva River (Croatia and Bosnia and Herzegovina)

LIFE PREDATOR: Prevent, detect, combat the spread of Silurus glanis in south European lakes to protect biodiversity

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