Locality-specific variation in the feeding of Sparus aurata L.: evidence from two Mediterranean lagoon systems

Tancioni, Lorenzo; Mariani, Stefano; Maccaroni, A.; Mariani, A.; Massa, Fabio; Scardi, Michele; Cataudella, Stefano

doi:10.1016/s0272-7714(02)00376-1

Cited by 52 publications

(33 citation statements)

References 11 publications

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“…Laboratory experiments with S. aurata larvae showed that the proportion of live prey in the diet increased during the first 10 days after feeding commenced, whereas the proportion of inert particles decreased (Fernández-Diaz et al, 1994), despite the constant density of the two prey types. In the wild, individuals of this species shifted to feeding heavily on copepods and mysids as juveniles (Tancioni et al, 2003). This ontogenetic shift in selectivity [the acquisition of a prey type in proportions that differ from its relative density around the predator (Chesson, 1983)] seems to be a common trend in fish.…”

Section: Implications For Larval Feedingmentioning

confidence: 99%

Suction-feeding across fish life stages: Flow dynamics from larvae to adults and implications for prey capture

Yaniv

Elad

Holzman

2014

Journal of Experimental Biology

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Suction feeding is thought to be the primary mode of prey capture in most larval fishes. Similar to adult suction feeders, larvae swim towards their prey while rapidly expanding their mouth cavity to generate an inward flow of water that draws the prey into the mouth. Although larvae are known to experience flows with lower Reynolds numbers than adults, it is unclear how the suction-induced flow field changes throughout ontogeny, and how such changes relate to prey capture performance. To address these questions, we determined mouth dimensions and opening speeds in Sparus aurata from firstfeeding larvae to adults. We proceeded to develop a computational model of mouth expansion in order to analyze the scaling of suction flows under the observed parameters. Larval fish produced suction flows that were around two orders of magnitude slower than those of adults. Compared with adult fish, in which flow speed decays steeply with distance in front of the mouth, flow speed decayed more gradually in larval fish. This difference indicates that viscous forces in low Reynolds number flows modify the spatial distribution flow speed in front of the mouth. Consequently, simulated predator-prey encounters showed that larval fish could capture inert prey from a greater distance compared with adults. However, if prey attempted to escape then larval fish performed poorly: simulations inferred capture success in only weakly escaping prey immediately in front of the mouth. These ontogenetic changes in Reynolds number, suctioninduced flow field and feeding performance could explain a widespread ontogenetic diet shift from passive prey at early life stages to evasive prey as larvae mature.

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Section: Implications For Larval Feedingmentioning

confidence: 99%

Suction-feeding across fish life stages: Flow dynamics from larvae to adults and implications for prey capture

Yaniv

Elad

Holzman

2014

Journal of Experimental Biology

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“…Stomach content analysis was not conducted here, but according to Arechavala-Lopez et al (2012), the initial diet of gilthead seabream upon escape was primarily based on macrophytes and food pellets, though very shortly thereafter (after 1 wk), gilthead seabream demonstrated the ability to feed on their most common natural prey. As an opportunistic feeder, gilthead seabream can adapt its diet to the available food in the habitat (Tancioni et al 2003), preferring bivalves, arthropods, and gastro pods as primary prey items (Pita et al 2002, Šegvić-Bubić et al 2011a, Hadj Taieb et al 2013. Increased daily detections observed in the study area indicated higher fish mobility, likely related to feeding activity.…”

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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“…The gilthead sea bream Sparus aurata L. is one of the most high-profile marine cyclic migrants in European warm-temperate waters (Lasserre, 1974;Mariani et al, 2002;Tancioni et al, 2003;Mariani, 2006), representing one of the most sought-after commercial coastal species and the largest contributor to Mediterranean finfish aquaculture (Barazi-Yeroulanos, 2010). In North-East Atlantic waters, this species is still considered a rare, highly prized angling trophy, as colder waters limit its distribution to the English Channel and the Celtic Sea (Whitehead et al, 1986); yet, recent capture records in England (Davis, 1988) and Ireland (IRE) (Fahy et al, 2005) have increased, leading to the hypothesis that a self-sustaining population may exist in this area, particularly off the coasts of Wexford and Cork (Fahy et al, 2005;Craig et al, 2008) (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Exploring neutral and adaptive processes in expanding populations of gilthead sea bream, Sparus aurata L., in the North-East Atlantic

et al. 2011

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Recent studies in empirical population genetics have highlighted the importance of taking into account both neutral and adaptive genetic variation in characterizing microevolutionary dynamics. Here, we explore the genetic population structure and the footprints of selection in four populations of the warm-temperate coastal fish, the gilthead sea bream (Sparus aurata), whose recent northward expansion has been linked to climate change. Samples were collected at four Atlantic locations, including Spain, Portugal, France and the South of Ireland, and genetically assayed using a suite of species-specific markers, including 15 putatively neutral microsatellites and 23 expressed sequence tag-linked markers, as well as a portion of the mitochondrial DNA (mtDNA) control region. Two of the putatively neutral markers, Bld-10 and Ad-10, bore signatures of strong directional selection, particularly in the newly established Irish population, although the potential 'surfing effect' of rare alleles at the edge of the expansion front was also considered. Analyses after the removal of these loci suggest low but significant population structure likely affected by some degree of gene flow counteracting random genetic drift. No signal of historic divergence was detected at mtDNA. BLAST searches conducted with all 38 markers used failed to identify specific genomic regions associated to adaptive functions. However, the availability of genomic resources for this commercially valuable species is rapidly increasing, bringing us closer to the understanding of the interplay between selective and neutral evolutionary forces, shaping population divergence of an expanding species in a heterogeneous milieu.

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Locality-specific variation in the feeding of Sparus aurata L.: evidence from two Mediterranean lagoon systems

Cited by 52 publications

References 11 publications

Suction-feeding across fish life stages: Flow dynamics from larvae to adults and implications for prey capture

Suction-feeding across fish life stages: Flow dynamics from larvae to adults and implications for prey capture

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

Exploring neutral and adaptive processes in expanding populations of gilthead sea bream, Sparus aurata L., in the North-East Atlantic

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