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Ornamental fish keeping and its propagation has been an interesting
activity for many, which provide not only aesthetic pleasure but
also financial openings. In Bangladesh, about 80 exotic fish
species were found with their decorative value, but in most cases,
aquarists and transporters get problem during their rearing and
transportation due to having no knowledge on their feeding
management technique appropriately. As exotic ornamental fishes
have to transport at long distance without feeding condition,
therefore stress becomes arise due to starvation and leads to weak
and death. This book provides some general information on survival
performance, weight loss and behaviour of some freshwater exotic
ornamental fish species under starved condition in aquarium and
also provides physico-chemistry data of aquarium water under that
condition. This book would be beneficial for aquarists,
transporters, researchers, and other people related to this
subject.
Giant freshwater prawn is the most important and valuable fisheries
item among all other fisheries commodities in Bangladesh. It plays
an important role in the economy of Bangladesh. Bangladesh has
unique and favorable environment for prawn and fish culture.
Culture of is gaining popularity in Bangladesh because of its high
market demand and suitability to stock with other commercially
important fish. Polyculture of prawn with carps makes the
ecological balance of the pond water, preventing the formation of
massive algae blooms and at the same time increase the total
production. While fish occupy mainly the water column rarely
exploring the bottom, prawns live along with the substrate and
efficiently utilize the benthic production. In this book, the
physico-chemical and biological condition of pond, prawn and fish
growth performance, survival rate, feeding efficiency and
production are mentioned. It is found that the production of prawn
with carps in polycuture pond at Northern Bangladesh is
satisfactory under supplementary diets which are made from local
fish feed ingredients.
Air-breathing fishes have become of great interest in recent years
for several reasons in different countries over the world. These
include the many adaptations of their respiratory and
cardiovascular systems for obtaining oxygen from air and water,
adaptation in their food and feeding habits, reproduction and
behavior. Also, they are important source of animal protein
especially in drought and flood prone areas. At present,
air-breathing fishes are gradually introducing in different
aquaculture practices like cage culture, waste fed aquaculture etc.
Unfortunately, there is no systematic record of air-breathing
fishes in Bangladesh. Species profile of air-breathing fishes with
special emphasis on their air-breathing organs are described in
this document. So, we strongly believe that this document would be
helpful to many scientists, students and teaching staff in
Bangladesh and other countries.
Exotic fishes have been introducing in Bangladesh since 1950;
mainly for increasing aquaculture production and serving ornamental
purposes; but there is no systematic record of these fish species
is maintained in Bangladesh. Still new species are introducing
every year. These exotic species are playing a vital role in the
total fish production as well as generating income and employment
opportunities. Several species are also proved and considered as
threat to the native species. In this work, status of exotic fishes
are provided with special emphasis on brief description of their
introduction, morphology, food and feeding, breeding, impacts and
economic importance. We believe, this document would help those
people who are interested in fish and Bangladesh fisheries and also
working on exotic fishes, especially researchers, teachers,
students involved in fisheries sector as well as aquarists too.
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