Aggregations of wild Atlantic Bluefin Tuna (Thunnus thynnus L.) at Mediterranean offshore fish farm sites: Environmental and management considerations

Arechavala-López, Pablo; Borg, Joseph; Šegvić-Bubić, Tanja; Tomassetti, Paolo; Özgül, Aytaç; Sánchez-Jérez, Pablo

doi:10.1016/j.fishres.2014.11.011

Cited by 30 publications

(15 citation statements)

References 26 publications

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“…Likewise, Arechavala‐Lopez et al . (, ) observed large predatory fish (tuna Thunnus thynnus and swordfish Xiphias gladius ) to aggregate around Mediterranean fish farms and Papastamatiou et al . () used hydroacoustic tags to document site fidelity and aggregations of sharks around Hawaii fish farms, underlining the importance of fish farms in aggregating these top predators.…”

Section: Interactions Between Finfish Farms and Wild Populationsmentioning

confidence: 99%

Attraction and repulsion of mobile wild organisms to finfish and shellfish aquaculture: a review

Callier

Byron

Bengtson

et al. 2017

Reviews in Aquaculture

110

130

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Knowledge of aquaculture–environment interactions is essential for the development of a sustainable aquaculture industry and efficient marine spatial planning. The effects of fish and shellfish farming on sessile wild populations, particularly infauna, have been studied intensively. Mobile fauna, including crustaceans, fish, birds and marine mammals, also interact with aquaculture operations, but the interactions are more complex and these animals may be attracted to (attraction) or show an aversion to (repulsion) farm operations with various degrees of effects. This review outlines the main mechanisms and effects of attraction and repulsion of wild animals to/from marine finfish cage and bivalve aquaculture, with a focus on effects on fisheries‐related species. Effects considered in this review include those related to the provision of physical structure (farm infrastructure acting as fish aggregating devices (FADs) or artificial reefs (ARs), the provision of food (e.g. farmed animals, waste feed and faeces, fouling organisms associated with farm structures) and some farm activities (e.g. boating, cleaning). The reviews show that the distribution of mobile organisms associated with farming structures varies over various spatial (vertical and horizontal) and temporal scales (season, feeding time, day/night period). Attraction/repulsion mechanisms have a variety of direct and indirect effects on wild organisms at the level of individuals and populations and may have implication for the management of fisheries species and the ecosystem in the context of marine spatial planning. This review revealed considerable uncertainties regarding the long‐term and ecosystem‐wide consequences of these interactions. The use of modelling may help better understand consequences, but long‐term studies are necessary to better elucidate effects.

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Section: Interactions Between Finfish Farms and Wild Populationsmentioning

confidence: 99%

Attraction and repulsion of mobile wild organisms to finfish and shellfish aquaculture: a review

Callier

Byron

Bengtson

et al. 2017

Reviews in Aquaculture

110

130

View full text Add to dashboard Cite

show abstract

“…obs.). Thus, it could be argued that mortality by predation could be an effective mechanism for reducing escapee survival, since the occurrence of large predators such as greater amberjack Seriola dumerili or bluefin tuna Thunnus thynnus in the Mediterranean is greatly driven by seasonal migrations and reproductive behaviour , Šegvić Bubić et al 2011c, Arechavala-Lopez et al 2015.…”

Section: Strong Short-term Farm Fidelitymentioning

confidence: 99%

Site fidelity of farmed gilthead seabream Sparus aurata escapees in a coastal environment of the Adriatic Sea

Šegvić-Bubić¹,

Arechavala-López²,

Niš³

et al. 2018

Aquacult. Environ. Interact.

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A small escape incident of gilthead seabream Sparus aurata tagged with acoustic transmitters (N = 25) from a commercial farm located in a coastal bay of the eastern Adriatic Sea was simulated to enable evaluation of recapture strategies and escapee management. Over a 3 mo monitoring period, tagged individuals showed spatial distribution closely related to fish farms, where 76 and 68% of tagged fish were present at the farm during the second and third weeks post-release respectively. Upon initial release, escaped seabream had a small total home range (0.142 km 2 ) that encompassed the farm site. Short-term residence differed among tagged fish. Few fish (28%) remained in the proximity of the fish farm for longer than 1 mo; most were likely angled or moved outside the acoustic array. Fish that moved elsewhere have the potential to cause substantial ecological and genetic impact, as they likely are able to quickly adapt to natural conditions. Considering the capture impact of the limited recreational fishery on this small-scale escape event, fish recapture by this type of fishery within 2 wk of escape could be feasible and is highly recommended.

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“…; Arechavala‐Lopez et al . 2013b, 2015a) could handicap the survival of escapees (Olla et al . ) and illegal overfishing around facilities must be prevented.…”

Section: Discussionmentioning

confidence: 99%

“…Predators around fish farms (Sanchez-Jerez et al 2008;Arechavala-Lopez et al 2013b, 2015a could handicap the survival of escapees (Olla et al 1994) and illegal overfishing around facilities must be prevented. For the recapture of escapees, trammel nets and gillnets are usually used.…”

Section: Heterogeneous Implications Of Escapees On Local Fisheries Anmentioning

confidence: 99%

Assessing the influence of gilthead sea bream escapees in landings of Mediterranean fisheries through a scale‐based methodology

Izquierdo-Gómez

Arechavala-López

Bayle-Sempere

et al. 2017

Fisheries Management Eco

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Gilthead sea bream (Sparus aurata L.) aquaculture has rapidly spread around the Mediterranean Sea. Fish escapes from sea cages are one of the major problems for the industry and also represent a threat to the marine environment. Fishery catches are also influenced by escape events, being mirrored in increased landings of cultured species. However, within the Mediterranean, studies shedding light on the incidence of escaped individuals in fisheries landings are scarce. Firstly, the present study describes a simple scale‐examination methodology to distinguish escaped from wild S. aurata landed by coastal fisheries. Secondarily, the incidence of escapees is assessed within landings of the species in the western Mediterranean. The scale readings revealed a monthly incidence of escapees between 11.2 and 20.8%, representing 6.8% of the total income derived from these landings. Moreover, morphological differences between wild fish captured near and far from fish farms point towards escape events as a source of potential genetic admixture between cultured and wild genotypes. Socio‐economic and ecological implications of escapees are discussed, and a set of management guidelines proposed, to prevent and/or mitigate the negative influences of escaped fish on the ecosystem and traditional users of the coast such as fisheries.

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Aggregations of wild Atlantic Bluefin Tuna (Thunnus thynnus L.) at Mediterranean offshore fish farm sites: Environmental and management considerations

Cited by 30 publications

References 26 publications

Attraction and repulsion of mobile wild organisms to finfish and shellfish aquaculture: a review

Attraction and repulsion of mobile wild organisms to finfish and shellfish aquaculture: a review

Site fidelity of farmed gilthead seabream Sparus aurata escapees in a coastal environment of the Adriatic Sea

Assessing the influence of gilthead sea bream escapees in landings of Mediterranean fisheries through a scale‐based methodology

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