One of the main challenges faced by Egyptian aquaculture is the seasonality
of the climate. While summer temperatures are very suitable
for growth and reproduction of the main farmed species, Nile tilapia,
winter temperatures fall well below the optimal levels for growth and
propagation (25–30 °C). stated that surface water temperatures
in winter are between 19 and 20 °C on sunny days, and falling to
7–10 °C in colder weather. If fish are kept in shallow water they can
suffer stress leading to high mortalities if low temperatures persist.
A recent modification of hapa-based systems has been to cover
ponds with greenhouses to increase water temperatures and facilitate
early spawning of tilapia Other hatchery operators have
developed tank based spawning systems, also enclosed by greenhouses and often supplied with heated water from boilers or groundwater Using these systems, hatchery operators are able to
meet the high demand for seed by fish farmers early in the season Only a limited number of studies have highlighted the technical
characteristics and economic performance of different commercial tilapia hatchery systems in Egypt None of them focused on critical factors facing
operators of fish hatcheries.
This paper compares the economic and technical performance of
three different types of tilapia hatcheries, identifies critical hatchery
sub sector problems and proposes recommended actions to address
them.
The three different tilapia systems are as follows:
hapas in outdoor ponds (hapa)
hapas in ponds enclosed by a greenhouse tunnel (greenhouse) and
tanks supplied by heated water (from a boiler or borehole) and
enclosed by a greenhouse tunnel (heated greenhouse)
The analysis is designed to help Egyptian fish farmers to make informed
decisions about which type of hatchery to operate. However, it
is also relevant to fish farms in many other parts of the world where tilapia hatcheries face fluctuating temperature regimes, such as high altitude zones of tropical and sub-tropical Africa, and areas encountering the effects of climate change.
One of the main challenges faced by Egyptian aquaculture is the seasonality
of the climate. While summer temperatures are very suitable
for growth and reproduction of the main farmed species, Nile tilapia,
winter temperatures fall well below the optimal levels for growth and
propagation (25–30 °C). stated that surface water temperatures
in winter are between 19 and 20 °C on sunny days, and falling to
7–10 °C in colder weather. If fish are kept in shallow water they can
suffer stress leading to high mortalities if low temperatures persist.
A recent modification of hapa-based systems has been to cover
ponds with greenhouses to increase water temperatures and facilitate
early spawning of tilapia Other hatchery operators have
developed tank based spawning systems, also enclosed by greenhouses and often supplied with heated water from boilers or groundwater Using these systems, hatchery operators are able to
meet the high demand for seed by fish farmers early in the season Only a limited number of studies have highlighted the technical
characteristics and economic performance of different commercial tilapia hatchery systems in Egypt None of them focused on critical factors facing
operators of fish hatcheries.
This paper compares the economic and technical performance of
three different types of tilapia hatcheries, identifies critical hatchery
sub sector problems and proposes recommended actions to address
them.
The three different tilapia systems are as follows:
hapas in outdoor ponds (hapa)
hapas in ponds enclosed by a greenhouse tunnel (greenhouse) and
tanks supplied by heated water (from a boiler or borehole) and
enclosed by a greenhouse tunnel (heated greenhouse)
The analysis is designed to help Egyptian fish farmers to make informed
decisions about which type of hatchery to operate. However, it
is also relevant to fish farms in many other parts of the world where tilapia hatcheries face fluctuating temperature regimes, such as high altitude zones of tropical and sub-tropical Africa, and areas encountering the effects of climate change.
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