Assessment on marine litter ingested by fish in the Adriatic and NE Ionian Sea macro-region (Mediterranean)

Anastasopoulou, Aikaterini; Viršek, Manca Kovač; Varezić, Dubravka Bojanić; Digka, Nikoletta; Fortibuoni, Tomaso; Koren, Špela; Mandić, Milica; Mytilineou, Chryssi; Pešić, Ana; Ronchi, Francesca; Šiljić, Jasna; Torre, Michele; Tsangaris, Catherine; Tutman, Pero

doi:10.1016/j.marpolbul.2018.06.050

Cited by 80 publications

(41 citation statements)

References 39 publications

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“…Similarly, the quantity of MPs and percentage of fish with MPs for C. saliens sampled from the Aegean Sea were higher than those obtained by various researchers that have studied similar species (Güven et al, 2017;Cheung et al, 2018;Halstead et al, 2018). Although the percentage of MPs in samples of M. barbatus barbatus collected from the Marmara Sea was higher than those that have been reported in previous studies, the average quantity of MPs was lower than estimates from previous studies (Bellas et al, 2016;Güven et al, 2017;Anastasopoulou et al, 2018;Giani et al, 2019). For T. mediterraneus and M. surmuletus, the levels of MPs were lower than estimates made in previous studies.…”

Section: Discussioncontrasting

confidence: 61%

Occurrence of microplastics in the gastrointestinal tracts of some edible fish species along the Turkish coast

Gündoğdu¹,

Çevik²,

Ataş³

2020

Turk J Zool

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The manufacturing of plastics has increased rapidly since 1950, with annual plastic production reaching 359 million tons in 2018 (PlasticEurope, 2019). It is estimated that 4.8-12.7 million tons of plastic end up in marine ecosystems every year (Jambeck et al., 2015). A total of 611 studies conducted at 4358 locations across the globe, as of September 2019, have revealed that 76.9% of marine litter consists of plastics (Tekman et al., 2019). It is further estimated that 92% of marine plastic pollution is in the form of microplastics (MPs) (Eriksen et al., 2014). Generally, plastic particles that are smaller than 5 mm are considered MPs (Galgani et al., 2013; GESAMP, 2019). This high quantity of MPs in the sea poses a significant threat to marine life.Marine life is affected by all kinds of plastic pollution, in addition to MPs. Currently, it is estimated that 2249 marine animals face threats from plastic pollution. The types of marine life affected most by marine litter include fish (21.93%), seabirds (18.43%), crustaceans and arthropods (11.68%), mollusks (7.79%), and marine mammals (6.28%) (Tekman et al., 2019). Multiple researchers have reported that MPs in the sea affect many marine species (fish, mussels, seagulls, and sea scallops) (Tekman et al., 2019). The types of effects that plastics have on these animals are manifold: the fouling of litter and its use as a habitat (38.7%), ingestion (32.6%), and entanglement (23.87%) (Tekman et al., 2019). Among these effects, ingestion poses a particularly serious risk to marine life, given the small size of MPs. The effects of these risks can be classified into 2 groups: physical and chemical (Markic et al., 2019). Physical effects ultimately depend on the size of MPs ingested and entanglement (Rist et al., 2018;Tunçer et al., 2019), whereas chemical effects can arise via additives or environmental pollutants absorbed by particles released or leached in the organism (Rist et al., 2018). One of the primary physical effects of MPs is the blockage of the digestive tract by relatively larger particles (Walkinshaw et al., 2020). In addition, nano-and microscale particles can be absorbed in the intestines and accumulate in different organs (Ivleva et al., 2017). Chemical effects of MPs are more widespread when compared to the physical effects. Plastics are materials that can be formed in several ways Abstract: Plastics have become an inseparable part of modern life as a consequence of their versatility, low cost, durability, and lightweight. In this study, the presence of microplastics (MPs) in the stomachs and digestive tracts of 243 individuals of leaping mullet (Chelon saliens (Risso, 1810)), red mullet (Mullus barbatus barbatus Linnaeus, 1758), surmullet (Mullus surmuletus Linnaeus, 1758), Mediterranean horse mackerel (Trachurus mediterraneus (Steindachner, 1868)), and sand steenbras (Lithognathus mormyrus (Linnaeus, 1758)), collected along the Marmara, Aegean, and Mediterranean coasts of Turkey was examined microscopically and through µ-Raman analysis. A total of 283...

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Section: Discussioncontrasting

confidence: 61%

Occurrence of microplastics in the gastrointestinal tracts of some edible fish species along the Turkish coast

Gündoğdu¹,

Çevik²,

Ataş³

2020

Turk J Zool

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“…To provide a brief overview of those variations, the results for three frequently assessed species are exemplarily listed in Table 1, reporting on the minimum and maximum sample sizes given in one study, along with the corresponding minimum and maximum percentages of MPfeeding individuals as well as minimum and maximum number of particles detected in the GIT of these species. The outcomes of studies reporting on MP uptake of the same species sampled from various locations with clear differentiation between those are intentionally not summed here, e.g., Anastasopoulou et al (2018) or Kartar et al (1976). As can be seen from this exemplary list for three species only, the range in terms of sample sizes, frequency of MP-feeding, and MP particle load per individual fish seems to be quite substantial, without considering the variability in detection methodologies, particles under investigation, size ranges of both particles and fish as well as the life stages under investigation.…”

Section: Number Of Taxa Per Study and Sample Sizesmentioning

confidence: 99%

Not as Bad as It Seems? A Literature Review on the Case of Microplastic Uptake in Fish

Müller

2021

Front. Mar. Sci.

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Within the past decade, microplastic (MP) particles (<5 mm in size) became the focus of both scientific and public attention, on one hand due to their cumulative industrial application and global presence, on the other hand due to their size range allowing the interaction with organisms at the base of the marine food web. Along with the growing evidence of their ubiquitous distribution, the ingestion of MP fibers and fragments has been verified for a variety of marine biota, with fish species being among the group of organisms most intensively studied both in the laboratory and in the field. While the gross of scientific literature focuses on the quantification and chemical characterization of MP in the gastrointestinal tract of fish, in-depth investigations on the impacts or a contextualization of ingestion are rarely accomplished. Yet, the constant media-coverage and omnipresence of the topic present a (threat) scenario among civil society which might lack a solid scientific foundation. This review, therefore, analyses the scientific output of 90 field studies covering 487 different fish taxa with due regard to explanatory variables for MP ingestion. Additionally, it highlights persistent knowledge gaps in relation to the examination of in-situ ingestion effects and proposes measures how to approach them in future research initiatives. Moreover, the potential existence of a publication bias and a consequent distortion of the perception of the topic is evaluated.

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“…The project analyzed the occurrence of microplastic in the stomachs of red mullet (Mullus surmuletus), and on the sea surface and sandy sediment [18], which is a new topic in scientific research in the Croatian part of the Adriatic Sea. Ingested litter has been found in fish [39], and its effects are still largely unknown. Plastic was the most common category of marine litter (about 80%) collected from the seabed by trawlers during fishing [40,41].…”

Section: Contributions To Scientific Researchmentioning

confidence: 99%

“…In another study, it was established that with a relatively short particle half-life of 43.7 days, the Adriatic Sea is defined as a highly dissipative basin where the shoreline is, by construction, the main sink of floating debris with evident seasonality in the calculated plastic concentration fields and coastline fluxes [17]. Previous studies showed that marine litter and microplastic can be found in all segments of the Adriatic marine environment, such as biota vertebrates [2,37,39] and invertebrates [36], exposing them to threats related to marine litter such as ingestion and entanglement. Furthermore, marine litter and microplastic are present in the water column [3], sediments [35,37], sea bottom [20,38], and beaches [1,24,33,34], as well as in kitchen salt for human consumption [45].…”

Section: Contributions To Scientific Researchmentioning

confidence: 99%

Marine Litter in Croatian Adriatic: Sources, Quantities and Stakeholders′ Perspectives

et al. 2021

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The problem of marine litter is becoming more visible in Croatia. The main goal of this paper is to investigate issues related to marine litter in the Croatian Adriatic, from the current state of sources and quantities of marine litter, through marine litter monitoring and legislation, to stakeholders’ awareness about the marine litter issue in Croatia. The topic was designed as a case study and was covered by the method of document analysis and the survey method. Quantitative analysis was done for involved stakeholders and their level of interest. The mean value method and method for stakeholder mapping for marine areas was used. In addition, an exhaustive review of Croatian marine litter studies was done. The results of the research indicate that our knowledge about marine litter sources and quantities in the Croatian Adriatic is still quite scarce and that the stakeholders in Croatia have a moderate level of interest in the marine litter issue. Conclusions indicate that in Croatia particular attention is committed to strengthening both bilateral and multilateral relations with the neighboring countries given the transboundary nature that allows marine litter to spread over long distances.

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Assessment on marine litter ingested by fish in the Adriatic and NE Ionian Sea macro-region (Mediterranean)

Cited by 80 publications

References 39 publications

Occurrence of microplastics in the gastrointestinal tracts of some edible fish species along the Turkish coast

Occurrence of microplastics in the gastrointestinal tracts of some edible fish species along the Turkish coast

Not as Bad as It Seems? A Literature Review on the Case of Microplastic Uptake in Fish

Marine Litter in Croatian Adriatic: Sources, Quantities and Stakeholders′ Perspectives

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