Environmental Engineering Reference
In-Depth Information
Indicator
Facet of
Other data
Strengths
Drawbacks
sustainability
required
Quantity on sale
Social,
Population size
Relatively easy data to obtain.
Quantity on sale is the outcome of supply and
in market
financial,
and productivity.
Gives a minimum estimate of
demand dynamics for the hunted good and
biological
numbers killed. Can be
its alternatives, and hence can have multiple
triangulated with household
causation. It is likely to be a severe
consumption levels. Can be
underestimate of numbers killed due to losses
useful in combination with
along the commodity chain. Need to know
other data.
catchment from which hunted goods came, in
order to estimate offtake rates. Multiple
harvesting locations with different levels
of sustainability may mask trends.
Market species
Biological
Trend over time or
Can indicate extirpation of
Selectivity along the commodity chain for
composition
expected/actual
vulnerable species hence lack of
saleable species or changes in gear type may cause
composition in
sustainability at ecosystem level,
changes in market composition. Trends can be
ecosystem
particularly if species not found in
masked if catch coming from areas with different
the market are of lower
underlying compositions. Power to
productivity than those still found.
detect change may be low.
Trends in
Financial,
—
Can indicate biological
Distance travelled is the outcome of supply and
distance travelled
biological
sustainability if all else remains
demand dynamics, hence can have multiple
to market
equal. Can be relatively easy to
causation. Without independent data,
obtain from market traders.
population depletion cannot be
assumed to be the cause of changes.
