(soft tissue and shell) × 100, provides information about the
physiological condition and the growth of mussel (Andral
et al., 2004); therefore, it is considered an indicator for mussel
health (Bajt et al. 2019).
Gonad somatic index
The gonad somatic index (GSI) represents the rapport among
the wet weight of gonad and the whole soft tissue × 100. This
index allows us to follow the temporal production of gamete
and locate the spawning period of mussels.
Statistical analysis
In the objective to examine if mussel organs (gill, digestive
gland, rest of soft tissues, and gonad) had a similar or a different metal level during the same season at each sampling
site, a multi organs comparison of data was conducted using
Fig. 1 Localization of mussel sampling sites. Figuier, Sercouf, and Algiers port
Table 1 Sampling dates, mussel
species, biometric characteristics,
condition index, and gonad
somatic index of mussel from
Figuier, Sercouf, and Algiers port
sites
Site
Sampling date Mussel species
Length
mean ± sd
mm
Width
mean ± sd
mm
IC
Mean
%
IGS
Mean
%
Figuier
22/06/2015
Perna perna
53.24 ± 2.88 24.20 ± 1.57 27.8
20.57
28/09/2015
56.35 ± 4.93 24.55 ± 2.08 18.76 10.83
21/01/2016
58.71 ± 3.78 24.44 ± 2.42 12.7
7.12
22/05/2016
64.75 ± 2.95
26.9 ± 1.87 24.18 22.73
Sercouf
25/06/2015
Mytilus galloprovincialis 63.75 ± 5.53 36.34 ± 2.63 31.64 42.94
05/10/2015
57.16 ± 3.36 31.17 ± 2.17 24.75 20.54
04/03/2016
56.79 ± 5.14 30.57 ± 1.4
18.24 15.87
14/05/2016
62.54 ± 3.59 32.46 ± 2.08 28.14 18.95
Algiers port 28/06/2015
Mytilus galloprovincialis 62.43 ± 2.94 31.93 ± 2.54 38.25 38.36
22/10/2015
50.12 ± 4.82 28.07 ± 2.44 26.82 24.61
25/02/2016
51.44 ± 1.97 28.75 ± 2.04 18.39
3.02
28/05/2016
53.32 ± 2.48 29.78 ± 2.14 29.17 27.17
Environ Sci Pollut Res