Predation impact of the notothenioid fish Trematomus bernacchii on the size structure of the scallop Adamussium colbecki in Terra Nova Bay (Ross Sea, Antarctica)

Dell'Acqua, Ombretta; Brey, Thomas; Vacchi, Marino; Chiantore, Mariachiara

doi:10.1007/s00300-017-2077-4

Cited by 7 publications

(5 citation statements)

References 65 publications

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“…Adamussium colbecki has been the subject of research within the Italian PNRA since the first Italian expeditions, resulting in an unusual in depth knowledge for an Antarctic species, testified by a large number of published studies ( Cerrano et al, 2000 , 2001 , 2006 ; Cerrano et al, 2009 ; Chiantore et al, 1998 , 2000 , 2001 ; Guidetti et al, 2006 ; Schiaparelli & Linse, 2006 ; Dell’Acqua et al, 2017 ; Moro et al, in press ). This species was also proposed as a candidate for a “Southern Ocean mussel-watch program” ( Berkman & Nigro, 1992 ; Nigro et al, 1997 ; Dalla Riva et al, 2004 ).…”

Section: Discussionmentioning

confidence: 99%

Oceanographic moorings as year-round laboratories for investigating growth performance and settlement dynamics in the Antarctic scallopAdamussium colbecki(E. A. Smith, 1902)

Schiaparelli

Aliani

2019

PeerJ

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Background Oceanographic moorings (OMs) are standard marine platforms composed of wires, buoys, weights and instruments, and are used as in situ observatories to record water column properties. However, OMs are also comprised of hard substrates on which a variety of invertebrates can settle when they encounter these structures along their dispersal routes. In this contribution, we studied the fouling communities found on two OMs deployed in the Ross Sea (Antarctica). Furthermore, a cage containing the Antarctic scallop Adamussium colbecki (E. A. Smith, 1902) was incorporated in the OM. The growth of the caged A. colbecki were evaluated after 1 year and their shells used as biological proxy for seawater temperature and salinity. Methods A variety of settlers were collected from two different OMs deployed in the Ross Sea (Antarctica) and species identified using a combination of morphological and genetic (mainly through DNA barcoding) characteristics. Caged scallops were individually marked with permanent tags and their growth studied in terms of size-increment data (SID). Cages were specifically designed to prevent damage to individuals due to water drag during OM deployment and retrieval. Growth parameters from the caged individuals were applied to the A. colbecki juveniles that had settled on the mooring, to trace the likely settlement period. Results The growth performance of caged A. colbecki was similar to that from previous growth studies of this species. The remarkable survival rate of caged specimens (96.6%) supports the feasibility of caging experiments, even for a species with a fragile shell such as the Antarctic scallop. Some of the new recruits found on the mooring were A. colbecki, the same species we put into special cages fixed to it. The settlement of the A. colbecki juveniles started during the Austral spring with a peak in summer months and, remarkably, coincided with seasonal changes in water temperature and flow direction, which were recorded by the mooring’s instruments. Genetic data from other settlers provided new information about their larval ecology and connectivity. Discussion Oceanographic moorings are expensive and complex experimental platforms that, at present, are strictly used for the acquisition of physical and biogeochemical data. Their use for in situ ecological experiments on model organisms suitable for caging and to study fouling species has yet to be fully explored. We present the outcomes of a study, which represents a baseline for the characterization of Antarctic fouling biodiversity. We hope that in the near future an internationally coordinated systematic study of settlers could be initiated around the Antarctic continent. This could utilize “new generation OMs” equipped with standardized settlement structures and agreed sampling protocols for the study of fouling communities.

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Section: Discussionmentioning

confidence: 99%

Oceanographic moorings as year-round laboratories for investigating growth performance and settlement dynamics in the Antarctic scallopAdamussium colbecki(E. A. Smith, 1902)

Schiaparelli

Aliani

2019

PeerJ

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“…bernacchii is among the most common fish species in Antarctic shallow waters, especially at Terra Nova Bay, where huge surfaces of the bottom are occupied by Antarctic scallop (Adamussium colbecki) facies [11]. This bivalve represents an important food source that T. bernacchii is able to eat [17] by crushing the valves, thanks to manipulation feeding assisted by the high power that its jaws are able to express [38]. Indeed, unlike other perciforms, for which the crushing of hard prey is entrusted to robust pharyngeal teeth, in T. bernacchii these are poorly developed [11].…”

Section: Discussionmentioning

confidence: 99%

“…Polychaetes and scallops are not the only resources for T. bernacchii, whose high SI and MA allow it to draw on a wide range of resources, showing a feeding plasticity focusing on the most locally abundant organisms among a wide range of potential prey [5,41,51]. For example, A. colbecki is exploited by T. bernacchii in the shallow waters of Terra Nova Bay due to its abundance [17].…”

Section: Discussionmentioning

confidence: 99%

“…Rocky cliffs extend from a shallow bottom up to 70 m in depth, dominated by algal species (e.g., Iridaea cordata and Phyllophora antarctica) and by a few invertebrate taxa, polychaetes, molluscs, echinoids and crustaceans [14,15], with the dominance of bivalve molluscs and polychaetes on soft bottoms [11]. Between a depth of 70-80 m, the scallop Adamussium colbecki reaches very high density and biomass, totally covering the seabed [16,17]. Below a depth of 70 m, substrates are heterogeneous, mostly inhabited by sponges and anthozoans [18].…”

Section: Introductionmentioning

confidence: 99%

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Ecomorphological Differentiation of Feeding Structures within the Antarctic Fish Species Flock Trematominae (Notothenioidei) from Terra Nova Bay (Ross Sea)

Carlig

Blasi

Pisano

et al. 2022

JMSE

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The Antarctic endemic fish genus Trematomus (Trematominae, Notothenioidei) includes 15 species very diverse in morphology, lifestyle and feeding ecology. Co-occurring on the continental shelf, they occupy different habitats and a wide range of ecological niches as the result of adaptive radiation during their evolutionary history. Ecomorphological differentiation is a key feature of adaptive radiations, with a general trend for specialization following divergence. Here, we investigated the trophic adaptive morphology and ecology of six Trematomus species from Terra Nova Bay (Ross Sea) through feeding apparatus metrics and geometric morphometrics. The suction index (SI), the mechanical advantage in jaw closing (MA), the relative surface of the adductor mandibulae muscle and nine morphological traits related to feeding structures were analysed. Head shape clearly differentiates the benthic (T. bernacchii, T. hansoni and T. pennellii) from the pelagic (T. eulepidotus and T. borchgrevinki) species. The position of the eyes and the orientation of the mouth also contribute to specific morphological differences and specialization. Interestingly, T. newnesi stands at an intermediate position and the mouth is clearly oriented upwards compared to the other congeneric species.

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“…In the littoral area of Terra Nova Bay (Victoria Land, Ross Sea) the scallop is very abundant from -20 m to -80 m (Chiantore et al 2001) and plays a key role in the benthic-pelagic coupling (Chiantore et al 1998). This species is 4 also acknowledged as an ecosystem engineer (Cerrano et al 2006(Cerrano et al , 2009, sentinel organism (Bonacci et al 2004;Regoli et al 2002) and as a relevant food source for higher trophic levels (Dell'Acqua et al 2017;Vacchi et al 2000). For all these reasons, the Antarctic scallop is listed in the Vulnerable Marine Ecosystem species (CCAMLR 2009).…”

Section: Introductionmentioning

confidence: 99%

Robustness of Adamussium colbecki shell to ocean acidification in a short-term exposure

Dell'Acqua

Trębala

Chiantore

et al. 2019

Marine Environmental Research

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Atmospheric pCO2 has increased since the industrial revolution leading to a lowering of the ocean surface water pH, a phenomenon called ocean acidification (OA). OA is claimed to be a major threat for marine organisms and ecosystems and, particularly, for Polar regions. We 2 explored the impact of OA on the shell mechanical properties of the Antarctic scallop Adamussium colbecki exposed for one month to acidified (pH 7.6) and natural conditions (unmanipulated littoral water), by performing Scanning Electron Microscopy, nanoindentation and Vickers indentation on the scallop shell. No effect of pH could be detected either in crystal deposition or in the mechanical properties. A. colbecki shell was found to be resistant to OA, which suggests this species to be able to face a climate change scenario that may threat the persistence of the endemic Antarctic species. Further investigation should be carried out in order to elucidate the destiny of this key species in light of global change.

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Predation impact of the notothenioid fish Trematomus bernacchii on the size structure of the scallop Adamussium colbecki in Terra Nova Bay (Ross Sea, Antarctica)

Cited by 7 publications

References 65 publications

Oceanographic moorings as year-round laboratories for investigating growth performance and settlement dynamics in the Antarctic scallopAdamussium colbecki(E. A. Smith, 1902)

Oceanographic moorings as year-round laboratories for investigating growth performance and settlement dynamics in the Antarctic scallopAdamussium colbecki(E. A. Smith, 1902)

Ecomorphological Differentiation of Feeding Structures within the Antarctic Fish Species Flock Trematominae (Notothenioidei) from Terra Nova Bay (Ross Sea)

Robustness of Adamussium colbecki shell to ocean acidification in a short-term exposure

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