Table 4.
Overview of the average energy densities of Electrona antarctica
| Season | Location | n | Mean size (mm; SL) | WW (g) | DW (g) | Water content (%) | Mean energy density | Method | Source | |
|---|---|---|---|---|---|---|---|---|---|---|
| kJ g−1 WW | kJ g−1 DW | |||||||||
| Summer | Macquarie | 20 | 50.4 ± 13.1 SD | 1.9 ± 1.5 SD | 0.6 ± 0.5 SD | 69.9 ± 4.3 SD | 9.04 ± 1.89 SD | 30.76 ± 8.30 SD | BC | Tierney et al. (2002) |
| Lazarev Sea | 31 | 49.1 ± 16.8 SDa | 1.4 ± 1.4 SD | 0.5 ± 0.5 SD | 73.3 ± 7.2 SD | 9.94 ± 1.11 SD | 32.26 ± 1.15 SD | BC | This study (PS89) | |
| WAP | 76.5 ± 3.79 SE | 31.9 ± 0.29 SE | BC | Ruck et al. (2014) | ||||||
| Elephant Island | 3 | 71.7 ± 0.6 SE | 8.55 ± 0.19 SEb | 30.21 | PC | Ishii et al. (2007) | ||||
| Autumn | East Antarctica | 22 | 57.4 ± 21.2 SD | 2.6 ± 2.5 SD | 0.7 ± 0.8 SD | 73.7 ± 4.0 SD | 7.26 ± 1.68 SD | 27.21 ± 2.76 SD | BC | Van de Putte et al. (2010) |
| Lazarev Sea | 113 | 47.6 ± 15.9 SD | 1.8 ± 1.8 SD | 0.6 ± 0.6 SD | 68.4 ± 4.14 SD | 9.35 ± 1.58 SD | 29.4 ± 1.80 SD | BC | Van de Putte et al. (2006) | |
| Weddell Sea | 27 | 61.9 | 3.9 | 1.2 | 68.7 ± 3.4 SD | 6.73 | 21.5 | PC | Donnelly et al. (1990)c | |
| 68.2 | 9.11 | 28.65 | BC | Green and Gales (1990) | ||||||
| Winter | Lazarev Sea | 74 | 52.6 ± 19.5 SD | 2.4 ± 3.5 SD | 0.8 ± 1.2 SD | 71.3 ± 4.2 SD | 8.35 ± 1.82 SD | 28.77 ± 2.67 SD | BC | Van de Putte (2008) |
| Kerguelen | 5 | 64.5 ± 8.6 SD | 3.2 ± 1.8 SD | 1.3 | 60.8 ± 8.8 SD | 13.3 ± 2.6 SD | 34.3 ± 3.8 SD | BC | Lea et al. (2002) | |
| Scotia Sea | 35 | 68.3 | 5.6 | 1.7 | 69.6 ± 3.7 SD | 7.71 | 25.36 | PC | Donnelly et al. (1990) | |
| Spring | Ross Sea | (p) | 81a ± 10 SE | 7.4 ± 2.5 SE | 2.3 | 69.6 | 9.0 | 29.61 | BC | Lenky et al. (2012) |
| Scotia Sea | 16 | 66.1 | 3.8 | 1.2 | 69 ± 3.7 SE | 5.86 | 18.9 | PC | Donnelly et al. (1990) | |
In the ‘method’ column the method used for energetic value determination is indicated, where BC is bomb calorimetry and PC is proximate composition. Numbers in italics represent values that were converted using the energetic values, wet weights, dry weights and water contents from the given sources. n represents the number of samples measured. Where this expresses samples of pooled individuals, this is indicated with (p). The standard error (SE) or standard deviation (SD) as given in the original source is added where available. The mean size is given in standard length (SL) unless otherwise indicated
aMeasured in total length (TL)
bA lipid factor of 39.6 kJ g−1 used for energy density estimation
cA factor of 4.19 was used to convert calories to joules