An assessment of local fisheries in Diego-Suarez Bay, Madagascar

Mean number of fish
14
12
10
8
6
4
2
0
0-5
6-10
11-15
16-20
21-25
26-30
31-35
Size class (cm)
Figure 10. Mean number of all fish (families and sectors combined) recorded during a single UVC survey,
found in each size class (data from July 2005 to December 2008)
Fish of small size were relatively commonly recorded during UVC surveys. The frequency of individuals
in each size class decreases rapidly. The larger species (>20cm) that are more likely to be targeted by
fishermen were found at low frequencies (figure 10).
3.3 Visual Observations
3.3.1 Fishing areas
The number of fishing vessels recorded at each survey site in each sector of the bay before and after the
UVC and LIT surveys were used to identify popular fishing sites (figure 11). Sectors 0, 4, 5 and Ramena
had the largest number of fishing vessels present.
36-40
41-45
46-50
51+
12