Environmental Assessment
Volume C-4.3
Slurry Pipeline
Fish and Aquatic Resources
Ambatovy Project
143
January 2006
Table 4.3-12 Potential Effects and Residual Impacts for Artisanal Fisheries
Project Period
Potential Effects
Mitigation
Residual Impacts
construction
local habitat and water quality
effects on aquatic species
abundance
increased harvest as a result of
new access and addition of
construction workforce
regulated use
low magnitude / short-term loss during
infrastructure construction
high magnitude/short-term loss within the
pipeline or associated construction camp
areas due to workforce
operation
potential change in use of aquatic
biota as a result of increased and
improved access
local environmental
education programs
limit access
low to moderate magnitude / medium-term
change as a result of access changes
closure
increased harvest of aquatic biota
as a result of improved access
low magnitude / long-term harvest of
aquatic biota
The extent and use of aquatic resources within the pipeline disturbance area is
poorly understood and based only on observation during field programs.
However, impacts to abundance and health of fish have been shown above to be
of low consequence, thus the prediction confidence for impact ratings for
artisanal fisheries within the pipeline LSA is rated medium.
An overall residual impact classification is presented in Table 4.3-13; the overall
environmental consequence scores were based on the screening system described
in Volume A, Section 7.
Table 4.3-13 Residual Impact Classification for Effects on Artisanal Fisheries
Phase
Direction Magnitude Geographic
Extent
Duration Reversibility Frequency Environmental
Consequence
Effect: Access Change
construction negative
high
local
short-
term
yes
medium
moderate
operations
negative
low
local
medium-
term
yes
high
low
closure
negative
low
local
long-
term
yes
high
low
Effect: Changes in Fish Availability or Health
construction negative
low
local
long-
term
yes
short
low
operations
negative
low
local
medium-
term
yes
medium
low
