Fishes of the eastern Ross Sea, Antarctica

Donnelly, Joseph; Torres, Joseph J.; Sutton, Tracey; Simoniello, Christina

doi:10.1007/s00300-004-0632-2

Cited by 64 publications

(45 citation statements)

References 35 publications

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“…While we found complete adjustment of routine metabolism to increased temperature, growth performance declined by up to 84% after long-term acclimation to 2 and 4°C in T. bernacchii. Trematomus bernacchii belongs to the family Nototheniidae, which makes up a large part of the biomass in coastal ecosystems, such as the Ross Sea (Donnelly et al, 2004). An 84% reduction in growth of T. bernacchii would result in a decrease of production of a similar magnitude for this species in the Ross Sea (using growth estimates of Hureau, 1970).…”

Section: Discussionmentioning

confidence: 99%

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Elevated temperature causes metabolic trade-offs at the whole organism level in the Antarctic fish Trematomus bernacchii

Sandersfeld

Davison

Lamare

et al. 2015

Journal of Experimental Biology

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As a response to ocean warming, shifts in fish species distribution and changes in production have been reported that have been partly attributed to temperature effects on the physiology of animals. The Southern Ocean hosts some of the most rapidly warming regions on earth and Antarctic organisms are reported to be especially temperature sensitive. While cellular and molecular organismic levels appear, at least partially, to compensate for elevated temperatures, the consequences of acclimation to elevated temperature for the whole organism are often less clear. Growth and reproduction are the driving factors for population structure and abundance. The aim of this study was to assess the effect of long-term acclimation to elevated temperature on energy budget parameters in the highAntarctic fish Trematomus bernacchii. Our results show a complete temperature compensation for routine metabolic costs after 9 weeks of acclimation to 4°C. However, an up to 84% reduction in mass growth was measured at 2 and 4°C compared with the control group at 0°C, which is best explained by reduced food assimilation rates at warmer temperatures. With regard to a predicted temperature increase of up to 1.4°C in the Ross Sea by 2200, such a significant reduction in growth is likely to affect population structures in nature, for example by delaying sexual maturity and reducing production, with severe impacts on Antarctic fish communities and ecosystems.

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Section: Discussionmentioning

confidence: 99%

“…Their fauna is highly endemic and mostly consists of the perciform suborder Notothenioidei, with the family Nototheniidae dominating coastal ecosystems (Eastman and Hubold, 1999;Donnelly et al, 2004). Fish play an important role in the Antarctic food web, as they link top predators such as birds and mammals with lower trophic levels.…”

Section: Introductionmentioning

confidence: 99%

Elevated temperature causes metabolic trade-offs at the whole organism level in the Antarctic fish Trematomus bernacchii

Sandersfeld

Davison

Lamare

et al. 2015

Journal of Experimental Biology

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“…3; Greely et al 1999). Due to the dominance of juveniles, high individual densities were not reflected in biomass density (0.261 g WW m -2 ), which was at the lower end of the range reported from the western Weddell Sea and adjacent waters (Lancraft et al 1989, Donnelly et al 2006, but considerably higher than values reported from the Ross Sea, the Scotia Sea and the APF (Piatkowski et al 1994, Donnelly et al 2004, Collins et al 2008. The low numerical and biomass densities of Bathylagus antarcticus and Gymnoscopelus braueri in the Lazarev Sea were in the range reported from the near-surface layer (Kaufmann et al 1995, Donnelly et al 2006).…”

Section: Species Composition and Distribution Patternsmentioning

confidence: 79%

“…Only a few fish surveys have been conducted in the less intensively investigated sectors of the Southern Ocean (Hoddell et al 2000, Granata 2002, Donnelly et al 2004). Our study forms the first published record on the distribution of postlarval fishes in the pelagic waters of the Lazarev Sea and contributes new data on the distribution of fish larvae, 23 yr after the data collection of the most recent published record (Efremenko 1991).…”

Section: Discussionmentioning

confidence: 99%

Distribution, abundance and ecological relevance of pelagic fishes in the Lazarev Sea, Southern Ocean

Flores¹,

Putte²,

Siegel³

et al. 2008

Mar. Ecol. Prog. Ser.

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, respectively. A generalized additive model significantly related the density of postlarval E. antarctica to the abundance of Antarctic krill Euphausia superba, ocean depth and sea surface temperature. The diet of E. antarctica was dominated by copepods and euphausiid larvae. Mean energy density of E. antarctica in the upper 200 m was 2.8 kJ m -2 , which is equivalent to 36% of the energy stored in Antarctic krill stocks and probably would be considerably higher if a greater depth range were considered. This suggests that E. antarctica is a major energy transmitter in the food web of the Lazarev Sea, challenging the classical krill-dominated food web paradigm of the Southern Ocean.

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“…This species has a wide distribution throughout the Ross Sea continental shelf (DeWitt 1970, Granata et al 2000, Ackley et al 2003, Donnelly et al 2004, O'Driscoll et al 2011), but occurs in higher abundance in particular regions. The habitat defined by this analysis indicates that the early life history stages of this species are found in southwesterly locations with cold temperatures (−1.75 to −2°C), bottom depths of 500 and 700 m, slow surface speeds, increased sea ice concentration, deep mixed layers, and proximity to the coast (Table 5).…”

Section: Antarctic Silverfishmentioning

confidence: 99%

Distributions of krill and Antarctic silverfish and correlations with environmental variables in the western Ross Sea, Antarctica

Davis¹,

Hofmann²,

Klinck³

et al. 2017

Mar. Ecol. Prog. Ser.

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Antarctic krill Euphausia superba, crystal krill E. crystallorophias, and Antarctic silverfish Pleuragramma antarctica are key mid-trophic level species in the Ross Sea, connecting primary production to the upper trophic levels. Distributions of these species were constructed from observations made in the western Ross Sea from 1988 to 2004. Distributions of environmental conditions were obtained from a 5-km resolution circulation model (temperature, mixed layer depth, surface speed) and satellite-derived observations (chlorophyll, sea ice cover). A hierarchy of statistical methods determined correlations and relationships between species and environmental conditions. Each species occupies a localized habitat defined by different environmental characteristics. Antarctic krill are concentrated along the northwestern shelf break in a habitat characterized by deep (>1000 m) bottom depth, warm temperature (1 to 1.25°C), decreased sea ice, and proximity to the shelf break. Crystal krill and Antarctic silverfish are concentrated in Terra Nova Bay. Common characteristics of the habitat for these species are southwesterly location, coastal proximity, and cold temperature (−1.75 to −2°C). The habitat characteristics obtained for the 3 species provide a basis for projecting potential distribution changes in response to environmental change and for delineating regions of the Ross Sea for focused management and selection of marine protected areas that support ecosystem-level conservation plans.

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Fishes of the eastern Ross Sea, Antarctica

Cited by 64 publications

References 35 publications

Elevated temperature causes metabolic trade-offs at the whole organism level in the Antarctic fish Trematomus bernacchii

Elevated temperature causes metabolic trade-offs at the whole organism level in the Antarctic fish Trematomus bernacchii

Distribution, abundance and ecological relevance of pelagic fishes in the Lazarev Sea, Southern Ocean

Distributions of krill and Antarctic silverfish and correlations with environmental variables in the western Ross Sea, Antarctica

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