MONITORING PARASIT PADA BUDIDAYA IKAN DAN UDANG  DI DAERAH ISTIMEWA YOGYAKARTA

Parasites often cause the great loss in aquaculture either in fish or shrimp aquacultures. The loss will become more serious when fish or shrimp are secondary infected especially by bacteria. The objective of this study was to identify parasites in fish and shrimp culture inYogyakartaSpecialProvince (DIY). Samples of fish and shrimp were collected from several aquaculture centers in this region including several fish and shrimp hatcheries. Observation of parasites was conducted microscopically and macroscopically.Results showed that giant tiger prawn (Penaeus monodon) cultured in DIY was often infected by Zoothamnium sp. and Gregarines sp.. In addition, giant freshwater prawn (Machrobrachium rosenbergii) was often infected by Apiosoma sp., Dactylogyrus sp., Epystilis sp., Glossatella piscicola, Gregarines sp. and Zoothamnium sp.. Moreover Apiosoma sp., Dactylogyrus sp., Gyrodactylus sp., Ichthyopthirius sp., and Trichodina sp. were found in nile (Oreochromis niloticus) culture. Similar parasites such as Apiosoma sp., Dactylogyrus sp., Henneguya sp. Ichtyoptirius sp. and Trichodina sp..were found in Osphronemus gaurami. Ichtyoptirius sp. and Trichodina sp. also were found in walking catfish (Clarias gariephinus).

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Shrimp and prawn post-larvae collection and impacts in Bangladesh.

10.1079/ac.64175.20203483222 ◽

2020 ◽

Author(s):

Anwara Shelly

Keyword(s):

Penaeus Monodon ◽

Macrobrachium Rosenbergii ◽

Coastal Communities ◽

Freshwater Prawn ◽

Additional Source ◽

Shrimp Culture ◽

Giant Freshwater Prawn ◽

The Government ◽

Aquaculture Development ◽

Regular Practice

Abstract Fry collection of tiger shrimp (Penaeus monodon) and giant freshwater prawn (Macrobrachium rosenbergii) fry from wild aquatic resources is a regular practice among the poorer section of the coastal communities in Bangladesh. In the early stages of aquaculture development, shrimp culture was limited to a few areas but the growing demand for shrimp on the international market has opened an avenue for many new entrepreneurs. Until recently, shrimp farmers stocked only wild fry on their farms. Fry collectors found this emerging sector a good additional source of income and successively made it their major livelihood. Concerns over the effect of this practice on biodiversity prompted the Government to ban fry collection, thus threatening the livelihood of fry collectors.

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Use of a filamentous green alga (Chaetomorpha sp.) and microsnail (Stenothyra sp.) as feed at an early stage of intensive aquaculture promotes growth performance, artificial feed efficiency, and profitability of giant tiger prawn (Penaeus monodon)

PLoS ONE ◽

10.1371/journal.pone.0244607 ◽

2020 ◽

Vol 15 (12) ◽

pp. e0244607

Author(s):

Isao Tsutsui ◽

Dusit Aue-umneoy ◽

Piyarat Pinphoo ◽

Worachet Thuamsuwan ◽

Kittipong Janeauksorn ◽

...

Keyword(s):

Green Alga ◽

Feed Efficiency ◽

Penaeus Monodon ◽

Feed Consumption ◽

Control Group ◽

Benthic Organisms ◽

Shrimp Culture ◽

Filamentous Green Alga ◽

Tiger Prawn ◽

Intensive Aquaculture

With the worldwide demand for tropical penaeid prawn increasing in recent decades, more research on shrimp culture methods is needed to enhance efficiency and profitability for shrimp farmers. The objective of this study was to develop a technique to boost the productivity, feed efficiency, and profitability of the giant tiger prawn (Penaeus monodon). To accomplish this, a novel culture setup was established in which two benthic organisms, a filamentous green alga (Chaetomorpha sp.) and a microsnail (Stenothyra sp.), were propagated together with P. monodon post-larvae during an early culture stage and then offered to shrimp as supplementary live feeds in intensive aquaculture ponds. For the experiment, shrimp post-larvae (density: approximately 33 individuals m-2) were cultured in outdoor concrete ponds (9 × 9 × 1.2 m) under either control (fed only artificial feed, n = 3) or experimental (fed artificial feed and benthic organisms, n = 3) conditions until they reached marketable size (15 weeks). Apparent green algae consumption was 6.81 kg (8.4% green alga to total feed consumption), whereas microsnail consumption was 1.96 kg (2.4% microsnail to total feed consumption). Compared with the control group of giant tiger prawn, the experimental group showed significantly higher productivity (total number of shrimp produced: 118%; total shrimp production: 133%), feed efficiency (feed conversion ratio of artificial shrimp feed: 89%), and profitability (shrimp sales: 139%; balance between shrimp sales and costs: 146%), while labor and financial costs were kept minimal. These results can be explained by the enhanced growth of shrimp at the early stages of culture. The techniques developed in this study will help to advance the efficiency of intensive aquaculture operations for giant tiger prawn and also improve profitability for shrimp farmers.

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