In this issue:

  • Rearing of Scatophagus argus and Etroplus suratensis in coastal West Bengal, India.
    Subrato Ghosh and Tapan Maity
  • Harvesting Eurayle ferox (makhana) from wetland (beel) fisheries of Assam.
    Deepjyoti Baruah and Aparna Baruah
  • Prospects of ornamental fish culture in seasonal water bodies of upper Assam.
    Jyotirmoy Sonowal and Shyama Prasad Biswas
  • Production of tubifex - a new dimension in aquaculture in feeding juvenile fish.
    R. N. Mandal, S. Kar, P. P. Chakrabarti, D. N. Chattopadhyay, B. N. Paul, S. Adhikari, J. Maity and B. R. Pillai
  • Invasive apple snails (Pomacea spp.) in Brunei Darussalam: Current status and management in irrigated transplanted rice fields.
    Hajah Aidah binti Haji Mohd Hanifah, Fuziah binti Haji Hamdan, Khairunnisa binti Haji Omar Ali, Jormasita binti Jormasie, Siti Amaniah binti Haji Awang Besar, Masjuwita binti Haji Muhin, Fahmi bin Haji Masri, Norkhadijah binti Haji Latip, Haji Roslan bin Haji Pudin, Mohd Faadzel bin Haji Abdul Rahman, Nurul Hanisah binti Morni, Soetikno S. Sastroutomo, and Ravindra C. Joshi
  • Aquaculture: A new trend and a big opportunity in Sindh, Pakistan.
    Hari Das
  • NACA Newsletter

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Aquaculture Asia Magazine

Aquaculture Asia Magazine is an autonomous publication that gives farmers and scientists in developing countries a voice. Stories concern the small-scale aquaculture prevalent in the region and the circumstances of farmers trying to make ends meet in an increasingly globalised world. We accept articles on any aspect of aquaculture and the related processing, marketing, economic, environmental and social issues. An RSS feed is available if you wish to stay informed of new issues.

In this collection

Rearing of Scatophagus argus and Etroplus suratensis in coastal West Bengal, India

In the ornamental fish markets of India, the euryhaline spotted scat Scatophagus argus and pearlspot Etroplus suratensis are popularly sold as ornamental fish. This article describes the nursing of wild-caught spotted scat seed and in-pond breeding of pearlspot to produce marketable sized fish at the Joykrishna hatchery and fish seed farm, located in the Hooghly River estuarine zone in coastal West Bengal, India. The fish are reared in brackishwater ponds for commercial utilisation as ornamental fish, supplying Hyderabad and other cities.

Harvesting Eurayle ferox (makhana) from wetland (beel) fisheries of Assam

Makhana, Euryale ferox is a perennial aquatic herb with gigantic floating leaves that grows in still, shallow water. The sowing and harvesting of makhana seeds, a casual food for rural folk, is conducted by groups of migratory people belonging to the Mallah or Sahini community of Bihar. The makhana seeds are usually fallen and scattered over the bottom of the wetlands (beels) and must be collected manually by diving during September-November. The raw seeds sell for Rs. 60-70 per kg in Assam.

Prospects of ornamental fish culture in seasonal water bodies of upper Assam

India’s share of the international ornamental fish trade is marginal but has been able to show consistent growth over the years. Of the total ornamental fishes traded by India, approximately 85% are native fishes sourced from the Western Ghats and North East India. The aquaculture of native fishes in seasonal water bodies can play a role in both conservation and generation of livelihoods. Imparting knowledge regarding ornamental fish trade and establishing market linkages is required to further develop the industry.

Production of tubifex - a new dimension of aquaculture in feeding juvenile fish

The use of sludge or ‘tubifex’ worm, Tubifex tubifex, as a live food for juvenile fish has been long practiced in farmers’ fields and it is an important fish food for spawn rearing. The cost of tubifex worm becomes prohibitive in the dry season, when supplies are limited. We conducted trials to test the feasibility of culturing tubifex using a selection of agro-industrial wastes. Net biomass production was highest using rice mill sludge as a food source, over a culture period of 20 days.

Invasive apple snails (Pomacea spp.) in Brunei Darussalam: Current status and management in irrigated transplanted rice fields

This short research note provides insights on the invasive apple snails (Pomacea spp.) and rice cultivation in Brunei Darussalam. This freshwater invasive snail was first detected in 2009, but it was never introduced intentionally. Since then their population has increased swiftly and spread to almost all the rice areas across the country, becoming a major pest of irrigated transplanted rice. Research and collaboration among infested countries is important for accurate species identification and better understanding of the invasion pathways.

Aquaculture: A new trend and big opportunity in Sindh, Pakistan

The Sindh Province of Pakistan is very rich in aquatic resources and has a strong irrigation network. Farmers, after facing immense agricultural problems, now are considering aquaculture as an alternate option and converting their properties for aquaculture production. Commercial pond-based carp culture has significantly expanded and is now widely practiced in Sindh. Carp farmers have been making good profits and achieving high yields. Although aquaculture presently plays a modest role in the national economy of Pakistan its future prospects are bright.