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ABSTRACT: Shrimp, Penaeus monodon (Fabricius) and Penaeus merguiensis (de Man), culture on East Java is described with special attention to the differences in production characteristics between areas and districts. Traditionally, tambak culture developed along the North coast of East Java where the majority of modern tambaks are still located. The practice never developed extensively on Madura's Island. With the exception of the latter, intensification, startingin 1984-1987, touched all areas. In 1991, the combined production of P monodon and P. merguiensis reached 35 000 Mt, representing a value of US$ 220 × 106. The following year, a decline in total production was noted, mainly caused by a diminished production of intensive farms. Possible causes for this production drop are explored.
Aquaculture Research 06/2008; 26(11):819 - 821. · 1.20 Impact Factor
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ABSTRACT: The effects of stocking density [range: 2.0-5.5 postlarvae (PL) m−2] and water quality on the production of a traditional tambak tiger shrimp, Penaeus monodon Fabricius, culture system on one farm in Probolinggo, East Java, were studied during one culture period of 126 days using eight ponds. Production characteristics were recorded and water quality parameters monitored. Production was quadratically influenced by stocking density. The optimum density was 4.8 PL m−2, which corresponds with a production per crop of around 300 kg ha−1. Production was also quadratically related to mean shrimp body weight at harvest, while there was an inverse relationship between production and bottom organic matter, indicating that shrimp biomass diminishes the amount of organic matter accumulating at bottom of the tambak.
Aquaculture Research 06/2008; 29(4):229 - 236. · 1.20 Impact Factor
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ABSTRACT: Shrimp farmers in South-East Java have recently observed a decline in Penaeus monodon (Fabricius) production. To stabilize overall production, some farms have switched partially to biculture of P. monodon and P. merguiensis (de Man). The production from 33 ponds in two of these farms was analysed. In addition, the water quality in 10 ponds was monitored over the entire culture period. Information was also available on the post-larvae (PL) source and feed used per pond. Water quality remained stable during the culture period and there was no accumulation of organic material during the second half of the culture period. Stocking P. merguiensis 2 months after P. monodon partially compensated for the low production of P. monodon, thereby stabilizing overall production. When the production of P. monodon is low, the production of P. merguiensis is high and vice versa (P<0.001). Feed source had no effect on production when stocking density was included as a covariable in the analysis (P > 0.05), while P. monodon PL source caused production to differ by a factor of three (P<0.001). It was concluded that biculture of P. monodon and P. merguiensis is an effective way to stabilize overall shrimp production.
Aquaculture Research 06/2008; 29(10):743 - 750. · 1.20 Impact Factor
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ABSTRACT: A feeding experiment was conducted to evaluate the growth of tiger guapote, Cichlasoma managuense (Günther), fed on isocaloric diets with varying protein: energy ratios. The relative metabolic growth rate increased with the protein: energy ratio up to 110–120 mg protein/kcal (P < 0·05). The protein efficiency ratio was optimal at 110mg protein/kcal. The body composition was clearly influenced by diet composition. Results indicate that juvenile C managuense obtains near optimal growth rates when fed 35–40% protein diets with 110–120mg protein/kcal. Higher ratios will not be cost effective.
Aquaculture Research 04/2008; 25(6):631 - 637. · 1.20 Impact Factor
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