2.4. Statistical analysis
All statistics were performed on both volume-standardised
biomass data (g m3
) and density data (ind.$100 m3
). Since the
data were not normally distributed (ShapiroeWilk normality test,
p ¼ 0.05 threshold), non-parametric statistics were used. For each
species, inter-annual abundance differences were tested using
KruskaleWallis tests, followed by a Steel-Dwass post-hoc test when
appropriate. Similar procedures were used to test for differences
between sub-regions (i.e. eastern vs. western halves of the basin),
years (within the sub-regions), and average size (g ind.1
) between
sub-regions and the 4 water types.
Species distributions of Aurelia aurita and Cyanea spp. were
compared using the non-parametric modified Cramer-von Mises
statistic proposed by Syrjala (Syrjala, 1996), which tests for differences
in spatial-distributions between populations, and is
particularly adapted to species that exhibit aggregative behaviour
(Syrjala, 1996; Brodeur et al., 2002). Th
2.4. Statistical analysis
All statistics were performed on both volume-standardised
biomass data (g m3
) and density data (ind.$100 m3
). Since the
data were not normally distributed (ShapiroeWilk normality test,
p ¼ 0.05 threshold), non-parametric statistics were used. For each
species, inter-annual abundance differences were tested using
KruskaleWallis tests, followed by a Steel-Dwass post-hoc test when
appropriate. Similar procedures were used to test for differences
between sub-regions (i.e. eastern vs. western halves of the basin),
years (within the sub-regions), and average size (g ind.1
) between
sub-regions and the 4 water types.
Species distributions of Aurelia aurita and Cyanea spp. were
compared using the non-parametric modified Cramer-von Mises
statistic proposed by Syrjala (Syrjala, 1996), which tests for differences
in spatial-distributions between populations, and is
particularly adapted to species that exhibit aggregative behaviour
(Syrjala, 1996; Brodeur et al., 2002). Th
การแปล กรุณารอสักครู่..
2.4. Statistical analysis
All statistics were performed on both volume-standardised
biomass data (g m3
) and density data (ind.$100 m3
). Since the
data were not normally distributed (ShapiroeWilk normality test,
p ¼ 0.05 threshold), non-parametric statistics were used. For each
species, inter-annual abundance differences were tested using
KruskaleWallis tests, followed by a Steel-Dwass post-hoc test when
appropriate. Similar procedures were used to test for differences
between sub-regions (i.e. eastern vs. western halves of the basin),
years (within the sub-regions), and average size (g ind.1
) between
sub-regions and the 4 water types.
Species distributions of Aurelia aurita and Cyanea spp. were
compared using the non-parametric modified Cramer-von Mises
statistic proposed by Syrjala (Syrjala, 1996), which tests for differences
in spatial-distributions between populations, and is
particularly adapted to species that exhibit aggregative behaviour
(Syrjala, 1996; Brodeur et al., 2002). Th
การแปล กรุณารอสักครู่..