First Assessment of Micro-Litter Ingested by Dolphins, Sea Turtles and Monk Seals Found Stranded along the Coasts of Samos Island, Greece

Martín-Montalvo, Belén Quintana; Antichi, Simone; Miliou, Anastasia; Costa, Valentina

doi:10.3390/ani12243499

Cited by 4 publications

(2 citation statements)

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“…Moreover, since cetacean species coexist in the area with several anthropogenic pressures, such as fisheries, marine traffic, naval activity, and the occurrence of marine litter (Janssen et al, 2022; Pietroluongo et al, 2022), interaction between dolphins and anthropogenic pressures should be investigated to assess the effects exerted by human pressures on the ecological traits of dolphins.…”

Section: Discussionmentioning

confidence: 99%

“…One of the earliest and best‐known ornamentations is the 3,500‐year‐old dolphin fresco on the wall of the Queen's apartments in the ancient palace of Knossos on the island of Crete (Johnson, 2004). More recently, its occurrence has been confirmed by sightings (Inch, Pietroluongo & Hepburn, 2018; Pietroluongo et al, 2020; Milani et al, 2021) and stranding events (Pietroluongo et al, 2022). In addition, preliminary abundance estimates have been provided (Pietroluongo et al, 2020) and its role as a keystone species in the marine food web of the northern Aegean Sea has been demonstrated (Tsagarakis et al, 2010).…”

Section: Introductionmentioning

confidence: 87%

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Environmental variables influencing occurrence and distribution ofDelphinus delphisin the eastern Aegean Sea (eastern Mediterranean Sea)

Ingrosso,

Tintoré,

Cipriano

et al. 2023

Aquatic Conservation

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Cetaceans are considered bioindicators of the health state of marine ecosystems owing to their wide distribution across the different aquatic ecosystems in the world and their significant top‐down control role in the food chain, despite their low biomass. At the same time, effective management of wild cetacean populations severely affected by human pressure requires extensive knowledge on species distribution, habitat use, and associated threats. In this context, defining the factors that directly influence the local occurrence and distribution of cetaceans is one of the underlying challenges and is essential for their conservation and long‐term survival. Delphinus delphis sightings data, collected between 2017 and 2021 during 284 standardized vessel‐based surveys, were used to set up a presence–absence distribution model in the eastern Aegean Sea, eastern Mediterranean Sea. Binomial generalized additive models with logit as link function were run using the R package mgcv (restricted maximum likelihood method) and different biogeochemical explanatory variables collected from different sources. Longitude, latitude, salinity, chlorophyll a, dissolved ammonium, and dissolved phosphate were selected as non‐collinear predictive variables. Through a model validation based on a 10‐fold cross‐validation approach and a random data splitting procedure of 70%/30% (train/test dataset), a model formula has been selected with an explained deviance of 38.10%, an Akaike information criterion value of 1,661.3, and an area under curve of 0.91. The study confirms that long‐term time series of satellite‐derived data are useful to assess the occurrence and the spatial distribution of D. delphis, suggesting the need for a better understanding of the influence of these environmental factors especially in the framework of climate changes. Outcomes highlight the need to test further variables and further methods in order to provide increasingly reliable results in view of the conservation measures that must be adopted to stop or reduce the degree of pressure to which these species are subjected.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 87%

Environmental variables influencing occurrence and distribution ofDelphinus delphisin the eastern Aegean Sea (eastern Mediterranean Sea)

Ingrosso,

Tintoré,

Cipriano

et al. 2023

Aquatic Conservation

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Reducing uncertainty and confronting ignorance about the potential impacts of microplastic on animals: A critical review

Ding,

Dong,

Ouyang

et al. 2024

TrAC Trends in Analytical Chemistry

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Current status, biology, threats and conservation priorities of the vulnerable Mediterranean monk seal

Karamanlidis

2024

Endang. Species. Res.

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The Mediterranean monk seal Monachus monachus is one of the most endangered marine mammals on Earth. The species has made a notable recovery during the past 10 yr and is now considered Vulnerable by the International Union for the Conservation of Nature. Its global population comprises 3 subpopulations: 2 in the northeastern Atlantic Ocean and one in the eastern Mediterranean Sea. Global estimated abundance is 815-997 individuals, including 443-599 mature individuals; annual pup production averages 170.5. Over the past decade, increased research efforts have shed new light on various aspects of the species’ biology and life history, including habitat and habitat use, vital rates, communication and genetics. The main threats to the species are (1) terrestrial and marine habitat loss and degradation that has or is resulting in the occupation of unsuitable habitat and limited prey availability, (2) negative interactions with fisheries that result in accidental entanglement or deliberate killings in response to damages to catches and/or fishing gear, (3) unpredictable threats, including cave collapses and mass mortality events and (4) pollution. Priority conservation actions for the species include (1) strengthening the legal framework for the protection of the terrestrial and marine habitat of the species, (2) effective protection of the species and its terrestrial and marine habitat, (3) scientific population and habitat monitoring, (4) rescue and rehabilitation of injured, orphaned and sick pups to increase neonatal survival rates, (5) public awareness and education, (6) monitoring and mitigating negative seal-fishery interactions and (7) expansion of the species’ current geographic range in the Atlantic Ocean.

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First Assessment of Micro-Litter Ingested by Dolphins, Sea Turtles and Monk Seals Found Stranded along the Coasts of Samos Island, Greece

Cited by 4 publications

References 66 publications

Environmental variables influencing occurrence and distribution ofDelphinus delphisin the eastern Aegean Sea (eastern Mediterranean Sea)

Environmental variables influencing occurrence and distribution ofDelphinus delphisin the eastern Aegean Sea (eastern Mediterranean Sea)

Reducing uncertainty and confronting ignorance about the potential impacts of microplastic on animals: A critical review

Current status, biology, threats and conservation priorities of the vulnerable Mediterranean monk seal

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