International Journal of Marine Science 2016, Vol.6, No.27, 1-22
11
Table 4: Species composition and relative abundance of species and families found in the semi-industrial fishery during the lean and
peak fishing seasons of the year 2013
FAMILY
Relative
abundance of
families (%)
Species observed
Abundance
in lean sea
son
(numbers)
Relative
abundance in
lean season
(%)
Abundance in
peak season
(number)
Relative
abundance in
peak season
(%)
CARANGIDAE
49.00
Caranx crysos
78.000
0.540
296.00
0.150
Selar crumenophthalmus
171.00
1.190
1538.0
0.780
Decapturus punctatus
4416.0
30.79
91278
46.41
Decapturus rhoncus
720.00
5.020
4424.0
2.250
CLUPEIDAE
40.00
Ethmalosa fimbriata
180.00
1.260
0.0000
0.000
Sardinella aurita
2841.0
19.81
80520
40.94
Sardinella maderensis
1515.0
10.56
0.0000
0.000
SCOMBRIDAE
6.000
Auxis thazard
375.00
2.620
222.00
0.110
Scomber japonicus
744.00
5.190
11710
5.950
DACTYLOPTERIDAE
5.000
Dactylopterus volitans
0.0000
0.000
50.000
0.030
POMADASYDAE
Brachydeuterus auritus
27600
19.25
0.0000
0.000
PRIACANTHIDAE
Priacanthus arenatus
0.0000
0.000
348.00
0.180
SCIAENIDAE
Boops boops
516.00
3.600
5046.0
2.570
BOTHIDAE
Scyacium micrurum
12.000
0.080
0.0000
0.000
SEPIIDAE
Sepia officinalis
0.0000
0.000
580.00
0.290
SPHYRAENIDAE
Sphyraena sphyraena
12.000
0.080
0.0000
0.000
TETRAODONTIDAE
Epipphion gutiffer
0.0000
0.000
650.00
0.330
Total
100.0
14340
100.0
196662
100.0
Taxonomic families which had two or more species recorded together with the dominant family represented
61.95% relative abundance, while the other taxonomic families such as Pomadasydae, Sepiidae, Polynemidae,
Portunidae, made up 38.05% relative abundance.
Carangidae
was also the dominant family in the semi-industrial
fishery, with a relative abundance of 48.78%.
Carangidae
,
Clupeidae
and
Scombridae
made up 95.27% total
relative abundance in the semi-industrial fishery (Table 4). Others, comprising
Bothidae
,
Dactylopteridae
,
Pomadasydae
,
Priacanthidae
,
Sciaenidae
,
Sepiidae
,
Sphyraenidae
and
Tetraodontidae
made up 4.73% total
relative abundance.
Table 5: Abundance and relative abundance of crustaceans and molluscs in the artisanal fishery
Lean season
Peak season
No.
Family
Species
Abundance
Relative
Abundance (%)
Abundance
Relative abundance
(%)
1
Portunidae
Callinectes sapidus
1.0
0.04
160
3.54
2
Penaeidae
Penaeus notialis
0.0
0.00
128
2.83
3
Sepiidae
Sepia officinalis
10
0.35
24.0
0.53
Total
11
0.39
312
6.90
3.2.1 Shellfish abundance
Two crustacean species;
Callinectes sapidus
and
Penaeus notialis
, from taxonomic families Portunidae and
Penaeidae respectively and one mollusc specie Sepia officinalis from Sepiidae were identified in the artisanal
fishery. Sepia officinalis was also identified in the peak season of the semi-industrial fishery but there was none in
