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Aquaculture management by integrating seaweed with shrimp

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Relation http://eprints.cmfri.org.in/8911/
 
Title Aquaculture management by integrating seaweed with shrimp
 
Creator Seema, C
 
Subject Theses
Aquaculture
Fisheries Management
Seaweed
 
Description Aquaculture is the fastest growing food production sector in the world and
has come under increasing scrutiny and criticism because of coastal pollution.
Effluents' from intensive farming contain much organic matter, nitrogen
compounds, phosphorus and other nutrients, makes the water unfit for aquaculture
and lead to eutrophication. Macroalgae plays a vital role in controlling toxic wastes
to reasonable and cultivable limits and also improves water quality. Aquaculture
- management can be done effectively by integrating seaweeds into aquaculture
systems. This method can be done either by stocking seaweeds along with shrimp
in optimum stocking density or by recycling the water through a pond
supplemented with seaweeds. In the present study an attempt has been made to
find out the species of seaweed suitable for integrated farming with shrimp in
brackish water tide-fed system on southwest coast and sea water in pump-fed
system on southeast coast of India. The removal of nitrogenous compounds such
as ammonia, nitrate, nitrite and total nitrogen was found to be 65 to 82%, 34 to
53%, 28 to 77% and 53 to 60% respectively by seaweeds in the treatment ponds
inrhen compared to the control ponds. The species of Gracilaria verrucosa, proved
to be an ideal seaweed for integrated farming with shrimp in the brackishwater
ponds and post monsoon period is the most favourable period for integrated
farming as the growth performance of seaweed and shrimp were found to be more
than the monsoon period in the tide-fed system of southeast coast of India.
Eventhough the accumulation of toxic waste was less compared to southwest
coast, the growth rate was comparatively lower in sea water system of southeast
coast of India. G. verrucosa integrated with Enteromorpha intestinalis in optimum
stocking density can reduce stress on shrimp by utilizing excess nitrogenous
wastes either through bacterial mineralization or direct use by seaweeds. In the
Present context, luxuriant growth of G. verrucosa in the first year of experiment
leading to harvest of 880kg was due to the heavy amount of nutrient loaded in the
Pond for age long aquaculture activity, which enabled the proliferation of algal
growth and maximum removal of nitrogenous load from the system. It was also
observed that growth of alga in the pond was able to minimize the disease
problems in shrim
 
Date 2008
 
Type Thesis
NonPeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/8911/1/THESIS_160.pdf
Seema, C (2008) Aquaculture management by integrating seaweed with shrimp. ["eprint_fieldopt_thesis_type_phd" not defined] thesis, Central Marine Fisheries Research Institute. Submitted to Central Institute of Fisheries Education.