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Table 2 Life span (LS: years), turnover rate (P s/B ratio: year−1), and instantaneous rate of mortality (Z: year−1) estimated for males (M), females (F) and populations of Excirolana armata (Souza 1998; Lozoya and Defeo 2006; Lercari et al. 2010; this study) and E. braziliensis (Zuñiga et al. 1985; Fonseca et al. 2000; Veloso et al. 2003; Defeo and Martínez 2003; Caetano et al. 2006; Lercari et al. 2010)

From: Production of Excirolana armata (Dana, 1853) (Isopoda, Cirolanidae) on an exposed sandy beach in southeastern Brazil

Species LS P s/B Z Latitude Source
M F M F M F
E. armata a 0.78 0.99 4.02 3.10 5.53 4.90 24°27′S This study (first year)
E. armata a 0.79 0.88 3.19 3.10 6.43 7.36 24°27′S This study (second year)
E. armata a 1.20 1.90 1.64 2.13 3.23 3.42 25°20′S Souza (1998)
E. armata b 2.15   2.39   2.23   33°40′S Lozoya and Defeo (2006), Lercari et al. (2010)
E. armata 2.20 2.40    1.95 1.50 33°50′S Lozoya and Defeo (2006)
E. armata 2.10 1.90    1.85 1.65 33°50′S Lozoya and Defeo (2006)
E. braziliensis a,b 1.66   1.62   2.95   23°02′S Fonseca et al. (2000), Veloso et al. (2003)
E. braziliensis a,b 1.66   1.78   2.74   23°02′S Fonseca et al. (2000), Veloso et al. (2003)
E. braziliensis a 1.72 1.45 1.50 2.00 2.82 4.06 23°03′S Caetano et al. (2006)
E. braziliensis a 1.91 1.40 2.92 1.62 2.20 3.22 23°03′S Caetano et al. (2006)
E. braziliensis a,b 1.25   3.62   3.00c   23°27′S Zuñiga et al. (1985)
E. braziliensis b 2.30   0.95   0.90   33°40′S Defeo and Martínez (2003), Lercari et al. (2010)
E. braziliensis b 2.15   3.78   2.97   34°36′S Defeo and Martínez (2003), Lercari et al. (2010)
  1. aP/B ratios obtained with the weight-specific growth rate method
  2. bValue relative to the population
  3. cValue of Z according to Cardoso and Defeo (2004)