Nearshore population characteristics of the circumpolar Antarctic scallop Adamussium colbecki (Smith, 1902) at Terra Nova Bay (Ross Sea)

1993 ◽  
Vol 5 (4) ◽  
pp. 377-378 ◽  
Author(s):  
Marco Nigro
Keyword(s):  
Benthic Community ◽  
Ross Sea ◽  
Point Of View ◽  
Population Characteristics ◽  
Detailed Knowledge ◽  
Terra Nova Bay ◽  
Terra Nova ◽  
Adamussium Colbecki

Adamussium colbecki is one of the dominant members of the nearshore benthic community around Antarctica (Nicol 1966, Dell 1974). It has been studied from a systematic and biogeographic point of view since the beginning of this century (Smith 1902, Pelseneer 1903). However, detailed knowledge of its biology and ecology has been only acquired during the last decade (Stockton 1984, Berkman 1990, Berkman et al. 1991, Mauri et al. 1990, Nigro et al. 1992, Nakajima et al. 1982).

Exchange between populations of Adamussium colbecki (Mollusca: Bivalvia) in the Ross Sea

2006 ◽  
Vol 18 (4) ◽  
pp. 645-653 ◽  
Author(s):  
Marta Guidetti ◽  
Stefania Marcato ◽  
Mariachiara Chiantore ◽  
Tomaso Patarnello ◽  
Giancarlo Albertelli ◽  
...  
Keyword(s):  
Nuclear Dna ◽  
Ross Sea ◽  
Sampling Period ◽  
Mcmurdo Sound ◽  
Frequency Distributions ◽  
Larval Behaviour ◽  
Terra Nova Bay ◽  
Key Species ◽  
Terra Nova ◽  
Adamussium Colbecki

The endemic Antarctic scallop Adamussium colbecki (Mollusca: Bivalvia) represents a key species in the Ross Sea littoral benthic ecosystem, locally reaching very high densities. This species has an annual gametogenic cycle, with a summer spawning event, and a pelagic larval behaviour. This paper aims at describing population structure and genetic polymorphism (using AFLP) of the large populations inhabiting the Ross Sea (Terra Nova Bay and McMurdo Sound) in order to investigate possible genetic exchange between A. colbecki in these areas. In Terra Nova Bay, size-frequency distributions show, generally, the dominance of large individuals, although site related differences are found in the abundance of smaller size classes (less than 40 mm), suggesting that recruitment is not a regular event. All McMurdo sites are characterized by large individuals and, at least during this sampling period, recruitment is completely absent. Nuclear DNA analyses show that the largest differences are found at the largest scale (between McMurdo Sound and Terra Nova Bay), but all populations sampled, even at a smaller spatial scale, have a well-settled genetic structure, notwithstanding the pelagic larval strategy. The panmixia hypothesis has therefore to be rejected for this species.

Predator–prey relationship between the nototheniid fish Trematomus bernacchii and the Antarctic scallop Adamussium colbecki at Terra Nova Bay (Ross Sea)

2000 ◽  
Vol 12 (1) ◽  
pp. 64-68 ◽  
Author(s):  
Marino Vacchi ◽  
R. Cattaneo-Vietti ◽  
M. Chiantore ◽  
M. Dalu
Keyword(s):  
Ross Sea ◽  
Size Structure ◽  
Medium Size ◽  
Predator Prey ◽  
Size Classes ◽  
Terra Nova Bay ◽  
Trematomus Bernacchii ◽  
Terra Nova ◽  
The Impact ◽  
Adamussium Colbecki

Little information is available regarding predator-prey interactions in High-Antarctic coastal systems. In this study, the predation of Trematomus bernacchii (Pisces: Nototheniidae) on Adamussium colbecki (Mollusca: Pectinidae) is described and the related impact on the population structure of the mollusc is hypothesized. Fishes and scallops were collected during several expeditions between 1990/91 and 1997/98 summers, in nearshore waters at Terra Nova Bay (Antarctica). Adamussium colbecki was the main food item of T. bernacchii and an ontogenetic prey-size selection was observed. The predation was mainly on medium size classes of the scallop. These were lacking in the A. colbecki population sampled in the same period suggesting that the impact of fish-feeding on the size structure of the natural population of the mollusc may be substantial. Two size classes of the Adamussium population were not preyed on. Large adults avoid predation either because of the limits for mouth gape in the fish or by swimming avoidance capability, while smaller scallops may not be preyed upon because they are attached through byssus threads to very mobile large adults.

Diet of two coastal nototheniid fish from Terra Nova Bay, Ross Sea

1994 ◽  
Vol 6 (1) ◽  
pp. 61-65 ◽  
Author(s):  
M. Vacchi ◽  
M. La Mesa ◽  
A. Castelli
Keyword(s):  
Feeding Behaviour ◽  
Ross Sea ◽  
Feeding Habits ◽  
Important Prey ◽  
Terra Nova Bay ◽  
Trematomus Bernacchii ◽  
Terra Nova ◽  
Adamussium Colbecki ◽  
Nototheniid Fish ◽  
Epibenthic Invertebrates

An investigation into the feeding habits of two demersal nototheniids, Trematomus bernacchii and T. centronotus, showed that the most important prey were polychaetes, molluscs and euphausiids for T. bernacchii and polychaetes and amphipods for T. centronotus. Epifaunal (e.g. Barrukia cristata) and tube-dwelling polychaetes (Amphicteis cfr. midas and Amythas membranifera) were common in the diet of both species. Bivalvia including Adamussium colbecki were found in the diet of T. bernacchii. Epifaunal gastropods (Trochidae) were an occasional prey for T. centronotus. Amphipods (mainly Acanthonotozomatidae) and the euphausiid Euphausia frigida were the main crustacean food of T. centronotus and T. bernacchii respectively. Our data suggest a difference in the feeding behaviour of the two nototheniid species, although both appear capable of feeding on common epibenthic invertebrates.

Role of filtering and biodeposition by Adamussium colbecki in circulation of organic matter in Terra Nova Bay (Ross Sea, Antarctica)

1998 ◽  
Vol 17 (1-4) ◽  
pp. 411-424 ◽  
Author(s):  
M. Chiantore ◽  
R. Cattaneo-Vietti ◽  
G. Albertelli ◽  
C. Misic ◽  
M. Fabiano
Keyword(s):  
Organic Matter ◽  
Ross Sea ◽  
Terra Nova Bay ◽  
Terra Nova ◽  
Adamussium Colbecki

scholarly journals Age and productivity of the Antarctic scallop, Adamussium colbecki, in Terra Nova Bay (Ross Sea, Antarctica)

2003 ◽  
Vol 288 (2) ◽  
pp. 239-256 ◽  
Author(s):  
Olaf Heilmayer ◽  
Thomas Brey ◽  
Mariachiara Chiantore ◽  
Riccardo Cattaneo-Vietti ◽  
Wolf E Arntz
Keyword(s):  
Ross Sea ◽  
Terra Nova Bay ◽  
Terra Nova ◽  
The Antarctic ◽  
Adamussium Colbecki

Meiofaunal assemblages associated with scallop beds (Adamussium colbecki) in the coastal sediments of Terra Nova Bay (Ross Sea, Antarctica)

1999 ◽  
Vol 11 (4) ◽  
pp. 415-418 ◽  
Author(s):  
Roberto Danovaro ◽  
Antonio Pusceddu ◽  
Simone Mirto ◽  
Mauro Fabiano
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Biochemical Composition ◽  
Ross Sea ◽  
Coastal Sediments ◽  
Terra Nova Bay ◽  
Terra Nova ◽  
Very High ◽  
Adamussium Colbecki ◽  
Meiofaunal Community

Meiofaunal community structure in coastal sediments of Terra Nova Bay (Ross Sea) was related to quantity and biochemical composition of sedimentary organic matter. The sediments were generally characterized by large amounts of chloropigments and labile compounds (dominated by proteins), indicating high inputs of primary organic matter. Meiofaunal densities were very high and comparable to those from the most productive areas worldwide. Sediments with high densities of the scallop had low meiofaunal densities especially in the top 2 cm, suggesting that scallop clapping contributed to meiofauna resuspension. However, it is not possible to exclude the probability that meiofauna are part of the scallop beds apparently have an important role in structuring meiofaunal communities with nematodes dominant where Adamussium colbecki is absent, and gastrotrichs dominant (44–51%) in A. colbecki beds, reaching the highest density reported so far.

Particulate organic matter release below melting sea ice (Terra Nova Bay, Ross Sea, Antarctica): Possible relationships with zooplankton

2021 ◽  
pp. 103510
Author(s):  
Alessandro Cau ◽  
Claudia Ennas ◽  
Davide Moccia ◽  
Olga Mangoni ◽  
Francesco Bolinesi ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sea Ice ◽  
Particulate Organic Matter ◽  
Ross Sea ◽  
Terra Nova Bay ◽  
Terra Nova

scholarly journals A comparison between polynya area and associated ice production with mooring-based measurements of temperature, salinity and currents in the southwestern Ross Sea, Antarctica

2011 ◽  
Vol 52 (57) ◽  
pp. 291-300 ◽  
Author(s):  
Stefan Kern ◽  
Stefano Aliani
Keyword(s):  
Ross Sea ◽  
Time Lag ◽  
Ice Formation ◽  
Terra Nova Bay ◽  
In Situ Observations ◽  
Satellite Microwave ◽  
Terra Nova ◽  
Ice Production ◽  
The Impact

AbstractWintertime (April–September) area estimates of the Terra Nova Bay polynya (TNBP), Antarctica, based on satellite microwave radiometry are compared with in situ observations of water salinity, temperature and currents at a mooring in Terra Nova Bay in 1996 and 1997. In 1996, polynya area anomalies and associated anomalies in polynya ice production are significantly correlated with salinity anomalies at the mooring. Salinity anomalies lag area and/or ice production anomalies by about 3 days. Up to 50% of the variability in the salinity at the mooring position can be explained by area and/or ice production anomalies in the TNBP for April–September 1996. This value increases to about 70% when considering shorter periods like April–June or May–July, but reduces to 30% later, for example July–September, together with a slight increase in time lag. In 1997, correlations are smaller, less significant and occur at a different time lag. Analysis of ocean currents at the mooring suggests that in 1996 conditions were more favourable than in 1997 for observing the impact of descending plumes of salt-enriched water formed in the polynya during ice formation on the water masses at the mooring depth.

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