6. Economic Aspects of BFT Systems
In comparison to the conventional aquaculture systems, BFT systems generally im-
prove the growth performance (growth, specific growth rate, survival rate, and FCR) of
the reared aquatic species and water quality and, as such, these parameters play a vital
role in determining the aquaculture management costs. Moreover, reducing production
costs while optimizing profits is the major strategic goal driving the aquaculture indus-
try [
98
]. Certain growth performance parameters such as survival rate influence cost
returns and profitability. For example, a 20% increase in stocking density and growth
rate increases profitability by 57% and 45%, respectively [
99
]. Likewise, reducing feeding
costs by 20% can significantly impact profitability [
98
]. As mentioned earlier, bioflocs can
replace commercial feeds without negatively affecting the survival, growth performance,
and production of aquatic species. The efficiency of protein utilization is two times higher
in BFT systems compared to conventional systems. Production of one kilogram of tilapia
and green tiger shrimp (Penaeus semisulcatus) in BFT is associated with a 10% and 33%
reduction in costs, respectively, and this is dependent on the species, aquaculture feed,
the quantity of consumed biofloc, and the price of carbohydrates [
98
,
100
,
101
]. It is worth
noting that in BFT, generally, carbon source costs are incurred, thus eliminating the costs of
organic and inorganic fertilizer input. Likewise, BFT systems facilitate zero water exchange,
permit the reduction of water treatment costs by 30%, reduce the cultivation period, and
increase the survival and growth rate of aquatic species compared to the conventional
systems; hence, they are sustainable systems for aquaculture production [
7
,
13
,
98
].
Chia sẻ với bạn bè của bạn: |