Occurrence and impact of interactions between small-scale fisheries and predators, with focus on Mediterranean monk seals (Monachus monachus Hermann 1779), around Lipsi Island complex, Aegean Sea, Greece

Ríos, Noelia; Drakulic, Matija; Paradinas, Iosu; Milliou, Anastasia; Cox, Ruth

doi:10.1016/j.fishres.2016.10.013

Cited by 17 publications

(14 citation statements)

References 31 publications

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“…Typically, avoiding peak areas of depredation, which are often highly productive areas, or implementing move‐on responses, may force fishers to operate in areas of lower fishing success. While short‐term trade‐offs between catch rates and depredation are made by fishers towards maximizing fishing success regardless of interactions with marine predators (Richard, Guinet, Bonnel, Gasco, & Tixier, 2018), no studies were found to have assessed the overall optimal costs/benefits ratios of non‐avoidance vs. avoidance practices on the medium‐term (for instance over a full fishing season) or on the long‐term (over multiple years).…”

Section: Mitigation Attemptsmentioning

confidence: 99%

“…Some publications did reflect the emergence of interdisciplinary approaches, at both the individual (researcher) and collective (collaborations across researchers of diverse expertise/background) levels. Biologists are starting to incorporate aspects of the behaviour of fishers driving depredation through methods derived from Animal Ecology and Human Sciences (Dalla Rosa & Secchi, 2007; Hückstädt & Krautz, 2004; Mitchell, McLean, Collin, Taylor, et al, 2018; Passadore et al, 2015; Powell & Wells, 2011; Richard et al, 2018; Pon et al, 2012). Instances of collective interdisciplinary research were highlighted in scientific programs on depredation involving biologists and fishery scientists, but also cross‐sectoral (transdisciplinary) collaborations with industry representatives (fishers, companies, gear suppliers, etc.).…”

Section: Future Directionsmentioning

confidence: 99%

“…While studies assessing gear damage often mentioned the time spent repairing gear as non-fishing time generating additional cost for fishers, it was only assessed in one fishery (17-31 days per fisher per year due to damage by Mediterranean monk seals in Greece-Ríos, Drakulic, Paradinas, Milliou, & Cox, 2017). The same pattern was observed for costs associated with extra distances travelled and time spent at sea because of depredation, with theoretical costs mentioned in studies for 19 fisheries, but quantified for only 5 (ESM 1 Table1).…”

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confidence: 99%

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When large marine predators feed on fisheries catches: Global patterns of the depredation conflict and directions for coexistence

et al. 2020

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The sustainable mitigation of human-wildlife conflicts has become a major societal and environmental challenge globally. Among these conflicts, large marine predators feeding on fisheries catches, a behaviour termed "depredation," has emerged concomitantly with the expansion of the world's fisheries. Depredation poses threats to both the socioeconomic viability of fisheries and species conservation, stressing the need for mitigation. This review synthesizes the extent and socio-ecological impacts of depredation by sharks and marine mammals across the world, and the

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Section: Mitigation Attemptsmentioning

confidence: 99%

Section: Future Directionsmentioning

confidence: 99%

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confidence: 99%

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When large marine predators feed on fisheries catches: Global patterns of the depredation conflict and directions for coexistence

et al. 2020

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“…A small-scale artisanal fishery is active in the area. Trammel and gill-netters, bottom trawlers, and long-liners are distributed in several fishing harbors along the coast of Samos and neighboring islands [41][42][43][44]. Marked shipping traffic providing underwater noise affects the area, and floating plastic debris has been increasingly recorded, probably due to the presence of different marine thoroughfares from…”

Section: Study Areamentioning

confidence: 99%

Density and Abundance of Delphinus delphis in Waters South of Samos Island, Greece (Eastern Mediterranean Sea)

Cipriano

Ashok²,

Antichi³

et al. 2020

JMSE

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The Mediterranean subpopulation of short-beaked common dolphin Delphinus delphis is ranked as endangered on the IUCN (International Union for Conservation of Nature) Red List because it has sharply declined during the last decades, resulting in sparse and decreasing populations. Monitoring the conservation status of this endangered dolphin species is particularly relevant to fulfil targets under the range of several international agreements. Moreover, estimating the abundance of D. delphis is essential to verify the effectiveness of conservation action to maintain safe population levels in the Mediterranean Sea and to suggest appropriate modifications to limit potential threats. In this regard, a monitoring program of the short-beaked common dolphin in Samos Island (Greece) was carried out from 2016 to 2019, adopting a random line transect sampling method. The overall density and abundance estimates of D. delphis, obtained by applying conventional distance sampling (CDS) on sighting data, were 0.15 individuals/km2 (CV = 13.27%; 95% CI = 0.11–0.19 individuals/km2) and 51 individuals (CV = 13.27%; 95% CI = 40-66 individuals), respectively. Although, a longer time series of sighting data should be collected and a larger area should be investigated to better understand the population trend of D. delphis and its residency pattern, the results contribute to setting up a baseline reference for future assessment of its population in the Eastern Aegean Sea.

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“…In addition to that, interactions between bottlenose dolphins ( Tursiops truncatus Montagu, 1821; hereafter termed bottlenose dolphins) and SSF have been reported from coastal areas of Sardinia, Italy (Díaz López, 2006; Díaz López & Bernal Shirai, 2007; Pennino et al ., 2016), the Balearic Islands, Spain (Brotons et al ., 2008; Gazo et al ., 2008) and western Greece (Gonzalvo et al ., 2015). Likewise, various forms of interactions between SSF and monk seals have been documented in the Aegean Sea (Güçlüsoy, 2008 b ; Ríos et al ., 2017) and in the Atlantic coast off Western Sahara, where an important population of the species resides (González & De Larrinoa, 2013).…”

Section: Introductionmentioning

confidence: 99%

Using off-the-shelf GPS loggers to assess co-occurrence between marine mammals and small-scale fisheries: a pilot study from the Mediterranean Sea

Glarou

Kerametsidis²,

Akkaya³

et al. 2022

J. Mar. Biol. Ass.

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Fisheries constitute a major threat to marine mammals globally. To evaluate the impact of small-scale fisheries (SSF) on regional under-studied marine mammal populations, we tested a novel and cost-effective approach at three data-limited locations of the central and eastern Mediterranean Sea. Using off-the-shelf GPS loggers to track SSF activities and systematic surveys to map the distribution of marine mammals, we assessed the probability of co-occurrence between SSF and marine mammals by reporting areas of spatial overlap. Spatial overlap between SSF and the core zones of marine mammal distribution (ranging between 21.85–35.4%) was observed in all three locations, indicating potential interaction hotspots. The probability of co-occurrence in those areas varied from 0.5–2.9% depending on the species. The resulting overlap between fishing activity and marine mammals may pose a threat in both directions: higher risk of species entanglement and economic burden on fishers due to gear damage. Despite the spatial and temporal limitations of this pilot study, the proposed approach can provide baseline information on SSF-marine mammal co-occurrence, particularly in financially limited regions. If applied on a larger scale, our method may be used to inform future conservation actions with the aim to reduce pressure on key populations.

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Occurrence and impact of interactions between small-scale fisheries and predators, with focus on Mediterranean monk seals (Monachus monachus Hermann 1779), around Lipsi Island complex, Aegean Sea, Greece

Cited by 17 publications

References 31 publications

When large marine predators feed on fisheries catches: Global patterns of the depredation conflict and directions for coexistence

When large marine predators feed on fisheries catches: Global patterns of the depredation conflict and directions for coexistence

Density and Abundance of Delphinus delphis in Waters South of Samos Island, Greece (Eastern Mediterranean Sea)

Using off-the-shelf GPS loggers to assess co-occurrence between marine mammals and small-scale fisheries: a pilot study from the Mediterranean Sea

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