Distribution, growth and reproduction of the limpet Nacella (Patinigera) concinna (Strebel 1908) in relation to potential food availability, in Esperanza Bay (Antarctic Peninsula)

Brêthes, Jean-Claude; Ferreyra, Gustavo A.; Vega, S. de la

doi:10.1007/bf00240521

Cited by 67 publications

(74 citation statements)

References 37 publications

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“…In winter it migrates back into the subtidal zone. The abundance of microphytobenthos is correlated with the soma and gonad mass of Nacella (Brêthes et al 1994), which further demonstrates the important trophic link between microphytobenthos and this limpet.…”

Section: Grazing Effectsmentioning

confidence: 70%

“…This limpet is clearly the largest (mean length 20-30 mm) and most important grazer at our study site and can reach densities from 28 to 131 ind. m -2 in the Antarctic intertidal (Brêthes et al 1994). Nacella concinna feeds on macroalgal propagules and benthic microalgae (Iken 1996;Kim 2001;Peck and Veal 2001).…”

Section: Grazing Effectsmentioning

confidence: 99%

“…Nacella concinna feeds on macroalgal propagules and benthic microalgae (Iken 1996;Kim 2001;Peck and Veal 2001). Due to the availability of important energy resources in form of benthic micro-and macroalgae, Nacella migrates to the intertidal in spring (Brêthes et al 1994). In winter it migrates back into the subtidal zone.…”

Section: Grazing Effectsmentioning

confidence: 99%

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Grazing and UV radiation effects on an Antarctic intertidal microalgal assemblage: a long-term field study

Zacher

Hanelt²,

Wiencke

et al. 2007

Polar Biol

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A 15 week field experiment (austral summer Nov-Mar) was carried out in an intertidal hard bottom platform in Antarctica (King George Island). To test whether grazing and ultraviolet radiation (UVR) influenced the succession of a benthic microalgal assemblage, a twofactorial design was used (1) ambient radiation, >280 nm; (2) ambient minus UV-B, >320 nm; (3) ambient minus UVR, >400 nm versus grazer-no grazer). On four sampling occasions microalgae were identified, counted and carbon contents were calculated. The assemblage was dominated by the diatom genera Navicula and Cocconeis. Biomass was generally low in all treatments but was significantly reduced by grazing throughout the experiment. No significant UV effects were found. Grazer absence particularly favoured diatoms of the genus Cocconeis. We conclude that the Antarctic microalgal assemblage was unaffected by present day UVR whereas grazers acted as important drivers on the intertidal microalgal community structure.

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Section: Grazing Effectsmentioning

confidence: 70%

Section: Grazing Effectsmentioning

confidence: 99%

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Grazing and UV radiation effects on an Antarctic intertidal microalgal assemblage: a long-term field study

Zacher

Hanelt²,

Wiencke

et al. 2007

Polar Biol

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“…concinna has been studied widely in Antarctica (Walker 1972;Shabica 1976;Picken 1980;Breˆthes et al 1994). Although there is a general consensus that annual growth is slow, estimates of growth rate differ between studies.…”

Section: Introductionmentioning

confidence: 99%

Growth in the limpet Nacella concinna from contrasting sites in Antarctica

et al. 2004

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Annual shell growth was determined by mark and recapture in the limpet Nacella concinna (Strebel 1908) at two contrasting sites in Antarctica. At Signy Island, 60°S, growth was moderately fast, comparable with some limpets in more temperate areas. The fluorescent calcium marker calcein was used to validate the results from the mark/recapture study, and fine-scale growth increments showed that shell growth was seasonal. Further south at Rothera Point, 67°S, mean annual growth over a 3-year period was significantly slower than at Signy, and in 1 year was the slowest yet reported for a limpet. Comparison with an earlier mark/ recapture study at Arthur Harbour, Palmer Station (64°S) revealed a cline of decreasing growth performance with increasing latitude along the Antarctic Peninsula. It is not clear whether the slower annual growth rate at higher latitude was caused by physiological constraints, a reduced length of growing season, or a combination of both. Limpets show a global cline in growth performance, which decreases towards higher latitudes.

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“…The Antarctic/sub-Antarctic N. concinna migrates between shallow subtidal and intertidal habitats (Walker, 1972;Brêthes, 1994). In the intertidal, animals can be exposed to water temperature fluctuations (up to more than 10° C) and to H 2 O 2 concentrations in the low micromolar.…”

Section: Oxidative Stress and Antioxidant Responses In The Intertidalmentioning

confidence: 99%

Ca²⁺homeostasis and redox balance in Antarctic sea organisms: Effects of temperature and of environmental contaminants

Viarengo

Abele

Burlando

et al. 2000

Italian Journal of Zoology

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Cell redox balance and Ca 2+ homeostasis were studied in different Antarctic sea organisms selected on the basis of their suitability for use as experimental model systems. In particular, we focused our research on the following: (1) oxidative stress and antioxidant responses in the intertidal limpet Nacella continua; (2) biochemical characterisation and metal sensitivity of the SR Ca In vivo effects of temperature and H 2 O 2 were evaluated in the limpet Nacella concinna. Production of reactive oxygen species was assessed with the dihydrorhodamine 123 fluorescent probe, lysosome alterations with histochemical techniques, and antioxidant responses through Superoxide dismutase and catalase assays. Data suggest that Nacella spring migrations to intertidal levels, where rises in temperature occur, induce oxidative stress and antioxidant response. (2) (2.5 μΜ), and of temperature on Ca 2+ homeostasis and cell viability were assessed in the ciliate Euplotes focardii. Ca 2+ homeostasis and cell viability were altered by Hg 2+ at a temperature of 0° C and above, and by Cu 2+ and Cd 2+ at 10° C and above. Temperature alone was effective at 20° and 30° C, suggesting that rises in temperature cause an increased cell sensitivity to environmental contaminants.

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Distribution, growth and reproduction of the limpet Nacella (Patinigera) concinna (Strebel 1908) in relation to potential food availability, in Esperanza Bay (Antarctic Peninsula)

Cited by 67 publications

References 37 publications

Grazing and UV radiation effects on an Antarctic intertidal microalgal assemblage: a long-term field study

Grazing and UV radiation effects on an Antarctic intertidal microalgal assemblage: a long-term field study

Growth in the limpet Nacella concinna from contrasting sites in Antarctica

Ca²⁺homeostasis and redox balance in Antarctic sea organisms: Effects of temperature and of environmental contaminants

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Distribution, growth and reproduction of the limpet Nacella (Patinigera) concinna (Strebel 1908) in relation to potential food availability, in Esperanza Bay (Antarctic Peninsula)

Cited by 67 publications

References 37 publications

Grazing and UV radiation effects on an Antarctic intertidal microalgal assemblage: a long-term field study

Grazing and UV radiation effects on an Antarctic intertidal microalgal assemblage: a long-term field study

Growth in the limpet Nacella concinna from contrasting sites in Antarctica

Ca2+homeostasis and redox balance in Antarctic sea organisms: Effects of temperature and of environmental contaminants

Contact Info

Product

Resources

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Ca²⁺homeostasis and redox balance in Antarctic sea organisms: Effects of temperature and of environmental contaminants