Page 5 - m313p261
P. 5
Sarà et al: Dispersal of fish farm waste 265
0m 500 m 1000 m (a)
C = –22.3 ± 0.22 C = –24.0 ± 0.20 C = –23.0 ± 0.04
N = 5.2 ± 0.08 N = 2.9 ± 0.09 N = 3.5 ± 0.09
C p < 0.05; N p < 0.05 C p < 0.05; N p < 0.05
PHY = 31.9 PHY = 10.6 PHY = 28.4
TER = 31.0 TER = 73.3 TER = 58.7
PEL = 26.1 PEL = 11.4 PEL = 9.2
EJE = 11.0 EJE = 4.6 EJE = 3.7
C p > 0.05; N p < 0.05
0m 500 m 1000 m (b)
Fig. 2. Particulate organic mat- C = –22.1 ± 0.10 C = –22.0 ± 0.08 C = –22.4 ± 0.24
ter (POM) mean isotopic values
(‰) ± SE of carbon (δ13C) and ni- N = 2.6 ± 0.02 N = 3.9 ± 0.06 N = 3.3 ± 0.04
trogen (δ15N) measured at each
distance; significant differences C p > 0.05; N p < 0.05 C p > 0.05; N p < 0.05
between distance categories (0
vs. 500 m; 500 vs. 1000 m; 0 vs. PHY = 41.0 PHY = 46.2 PHY = 42.9
1000 m) indicated by p < 0.05 TER = 43.0 TER = 48.4 TER = 55.6
(ANOVA: df = 12, all ANOVA PEL = 9.0 PEL = 4.0 PEL = 1.3
assumptions met). (a) Gulf of EJE = 7.0 EJE = 1.4 EJE = 0.2
Castellammare (HYDRO 1); (b)
Menfi Bay (HYDRO 2); (c) Capo C p > 0.05; N p < 0.05
D’Orlando Bay (HYDRO 3). Per-
cent contribution of each POM 0m 500 m 1000 m (c)
source also reported — PHY:
phytoplankton contribution; TER: C = –22.0 ± 0.06 C = –21.5 ± 0.06 C = –21.9 ± 0.07
terrigenous-continental contri-
bution; PEL: pellet contribution; N = 1.8 ± 0.06 N = 4.2 ± 0.07 N = 4.6 ± 0.02
EJE: ejection from fish contri-
C p > 0.05; N p < 0.05 C p > 0.05; N p < 0.05
bution
PHY = 39.0 PHY = 57.4 PHY = 44.3
TER = 60.5 TER = 38.5 TER = 37.1
PEL = 0.5 PEL = 3.0 PEL = 13.9
EJE = 0.0 EJE = 1.1 EJE = 5.5
C p > 0.05; N p < 0.05
0m 500 m 1000 m (a)
C = –20.0 ± 0.04 C = –22.1 ± 0.05 C = –22.2 ± 0.13
N = 4.5 ± 0.04 N = 3.1 ± 0.05 N = 2.3 ± 0.04
C p > 0.05; N p < 0.05 C p > 0.05; N p < 0.05
SM = 23.0 SM = 27.1 SM = 29.3
TER = 45.9 TER = 65.6 TER = 67.4
PEL = 21.0 PEL = 5.0 PEL = 2.2
EJE = 10.1 EJE = 2.3 EJE = 1.1
C p > 0.05; N p < 0.05
0m 500 m 1000 m (b)
C = –20.2 ± 0.14 C = –21.3 ± 0.20 C = –23.6 ± 0.09
N = 4.2 ± 0.02 N = 4.5 ± 0.06 N = 4.1 ± 0.06
C p < 0.05; N p > 0.05 C p < 0.05; N p < 0.05
SM = 46.6 SM = 31.5 SM = 5.8
TER = 46.0 TER = 44.9 TER = 56.2
PEL = 5.2 PEL = 15.9 PEL = 25.9
EJE = 2.2 EJE = 7.7 EJE = 12.2
C p < 0.05; N p > 0.05
0m 500 m 1000 m (c)
C = –21.3 ± 0.09 C = –23.7 ± 0.09 C = –22.5 ± 0.05 Fig. 3. Sedimentary organic
matter (SOM) mean isotopic val-
N = 2.1 ± 0.11 N = 3.4 ± 0.09 N = 4.4 ± 0.11 ues (‰) ± SE of carbon (δ13C)
and nitrogen (δ15N) measured at
C p < 0.05; N p < 0.05 C p < 0.05; N p < 0.05 each distance. Percent contribu-
tion of each SOM source also
SM = 4.5 SM = 7.5 SM = 17.9 reported — SM: sand microflora
TER = 78.2 TER = 65.7 TER = 49.2 contribution. See Fig. 2 for fur-
PEL = 11.4 PEL = 18.1 PEL = 22.3
EJE = 5.9 EJE = 8.8 EJE = 10.5 ther details
C p < 0.05; N p < 0.05
