Damages on mussel farms potentially caused by fish predation—Self service on the ropes?

Šegvić-Bubić, Tanja; Grubišić, Leon; Karaman, N. K.; Tičina, Vjekoslav; Jelavić, Krstina Mišlov; Katavić, Ivan

doi:10.1016/j.aquaculture.2011.07.031

Cited by 50 publications

(43 citation statements)

References 34 publications

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“…This, combined with the ability of gilthead sea bream to adapt to wild environments, leads to increased survival rates of escapees. High gilthead sea bream predation on mussel farms along the Croatian coastline (Šegvić-Bubić et al 2011b) indicates that escaped individuals greatly contribute to heavy losses of mussels. In the situations where mussel farms in Mali Ston Bay are subjected to strong gilthead sea bream predation due to the interaction of different types of aquaculture (finfish vs. mussels), which is especially enhanced in MPAs, both diagnostic tools can be useful in controlling escapee events.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, a decline in mussel production (Mytilus galloprovincialis L.) has been recorded, caused by intense wild gilthead sea bream predation (Šegvić-Bubić et al 2011b), especially in Mali Ston Bay, Croatia's largest shellfish production area. A permanent mussel food source in the bay allows farmed escapees greater opportunities for survival and reproduction.…”

Section: Introductionmentioning

confidence: 99%

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Morphological and molecular differentiation of wild and farmed gilthead sea bream Sparus aurata: implications for management

Šegvić-Bubić¹,

Talijančić²,

Grubišić³

et al. 2014

Aquacult. Environ. Interact.

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A combination of molecular and morphological characteristics was used to investigate populations of wild and farmed gilthead sea bream Sparus aurata from the largest Croatian shellfish production area, Mali Ston Bay. Identification of farmed escapees was performed in the wild in order to evaluate and compare the detection sensitivity of molecular and morphological tools. Using a traditional set of measurements and a truss network system, morphometric trait analysis of gilthead sea bream showed clear body shape differences between individuals from the wild and farmed populations. Microsatellite markers only revealed weak neutral genetic differentiation between farmed and wild samples from Mali Ston Bay (Wright's F ST = 0.019, p > 0.05; Jost's D EST = 0.022), despite the fact that the farmed gilthead sea bream were of Atlantic origin. Using assignment tests, morphological (16%) and molecular (25%) analysis identified farmed escapees in the samples of wild gilthead sea bream in the vicinity of aquaculture sites. Morphological data showed good potential for distinguishing recent escapees in wild populations, since these characteristics are affected by the environment. This study demonstrates the presence of escapees in the local wild population in this region, and suggests the potential for genetic interaction.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Morphological and molecular differentiation of wild and farmed gilthead sea bream Sparus aurata: implications for management

Šegvić-Bubić¹,

Talijančić²,

Grubišić³

et al. 2014

Aquacult. Environ. Interact.

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“…The genetic introgression of farmed escapees into native populations (Glover et al 2012) can lead to reduced overall fitness of wild populations (Fleming et al 2000, Gilk et al 2004, Tymchuk et al 2007) and competition for food and habitat (Jonsson & Jonsson 2006, Šegvić-Bubić et al 2011a. Post-escape behaviour of coldwater-aquaculture species, such as Atlantic salmon Salmo salar or Atlantic cod, has been extensively studied (Olsen & Skilbrei 2010, Skilbrei 2010, Chittenden et al 2011, Zimmermann et al 2013).…”

Section: Introductionmentioning

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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“…In addition, predation can have an effect on the local maritime economy, such as shellfish losses due to predation by the gilthead seabream. Predation has already been reported in aquaculture concessions along the Mediterranean coast, especially in the Adriatic Sea where the concentration and abundance of seabream populations around mussel farms has caused considerable losses, indicating a strong negative impact on farm stability (Šegvić-Bubić et al 2011;Glamuzina et al 2014). While the economic impact is evident in this area, it has not yet been evaluated along the coast of Brittany despite significant losses on shellfish farmed in recent years.…”

Section: Introductionmentioning

confidence: 96%

Morphological identification and DNA barcoding used for diet analysis of gilthead seabream (Sparus aurata) in its expanding northerly range

Avignon¹,

Tastard²,

Weston³

et al. 2017

Aquat. Living Resour.

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-The gilthead seabream, Sparus aurata, is common in the Mediterranean Sea and along the Atlantic coasts of Portugal, Spain and France. Abundance of S. aurata has recently increased along the Brittany coast, showing good adaptation and acclimatisation to northern waters away from its original distribution range. The physiological adaptations (diet, reproduction, growth) of this fish to colder water could even lead to its colonisation of the English Channel. The ability to eat and digest hard prey makes this fish an important consumer of bivalves. The aim of this study was to make a preliminary evaluation of the diet of the gilthead seabream in its northern range of distribution. Prey items from stomach contents of wild adults from various sites along the East Atlantic coast of France to the English Channel were identified morphologically when it was possible, e.g. in presence of decapod appendices, shells of bivalves, or using DNA barcoding. Diet composition was analysed against sites, fish length and month of sampling using the frequency of occurrence (%F) and weight relative proportion (%W). Results showed that the diet of S. aurata was mainly composed of bivalves, malacostracans and gastropods with a huge dominance of Mytilus sp. (%F = 51.5 and %W = 40.2). This first diet analysis of individuals from the northern range of the species distribution showed its ability, as an opportunistic feeder, to find prey in newly colonised ecosystems and its preference for some organisms, especially mussels.

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Damages on mussel farms potentially caused by fish predation—Self service on the ropes?

Cited by 50 publications

References 34 publications

Morphological and molecular differentiation of wild and farmed gilthead sea bream Sparus aurata: implications for management

Morphological and molecular differentiation of wild and farmed gilthead sea bream Sparus aurata: implications for management

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

Morphological identification and DNA barcoding used for diet analysis of gilthead seabream (Sparus aurata) in its expanding northerly range

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