The ‘Moyna Model’ is accepted as an example for freshwater fish culture throughout West Bengal. Moyna is a great example of the freshwater fish culture revolution in West Bengal and a new horizon for culture of the major carps. Moyna fish farmers have adapted the procedures of Andhra farmers incorporating their own blend of experience, skill and technology. This article describes the history and development of major carp culture practices in Moyna, challenges faced by the industry including groundwater exploitation, and documents the experience of some progressive farmers.

NACA's Director General Dr Jie Huang will give a virtual lecture on "Biosecurity - the concept to guarantee the sustainable development of aquaculture" as part of the World Fisheries Day 2020 Lecture Series, hosted by the ICAR-Central Institute of Freshwater Aquaculture, India. The lecture will be presented on 22 December from 3pm - 4:30pm India Standard Time (UTC +5:30) via Zoom. The lecture will feature Special Remarks by Dr C.N. Ravisankar, Director of ICAR-CIFT. The Organiser is Dr S.K. Swain, Director of ICAR-CIFA, and the Coordinator is Dr S.S. Giri, Head, FNP Division. Attendance is open to all, please register.

The 86th edition of the Quarterly Aquatic Animal Disease Report contains information from fifteen governments. The foreword provides a discussion of a webinar on decapod iridescent virus 1 (DIV1), held on 20 August 2020.

The 85th edition of the Quarterly Aquatic Animal Disease Report contains information from nine governments. The foreword provides a disease advisory concerning decapod iridescent virus 1 (DIV1), an emerging threat to the shrimp industry.

In this issue:

Hatchery techniques for the seed production of short-necked clams (Paphia undulata) in Nha Trang, Vietnam; Lovesome chum of the aquarium are wreaking havoc in East Kolkata Wetlands, India; Concept of indigenous recirculatory aquaculture system executed in West Bengal, India and other places; Homestead modular hatchery technology of brackishwater catfish, Mystus gulio: A potential alternate livelihood option for small and marginal farmers of Sunderban; NACA Newsletter.

In this issue:

Vale Professor Sena De Silva; the State of World Fisheries and Aquaculture 2020; Viral covert mortality disease (VCMD): Disease card; Disease advisory: Decapod iridescent virus 1 (DIV1): An emerging threat to the shrimp industry; Infection with decapod iridescent virus 1 (DIV1): Disease card; Proceedings of the Regional Workshop on Underutilized Fish and Marine Genetic Resources and their Amelioration; Latest special issue of Gender, Technology & Development examines new learnings on women and fisheries; Development of a global information system for farmed types of aquatic genetic resources; Quarterly Aquatic Animal Disease Report, October-December 2019.

The catfish Mystus gulio is a small indigenous euryhaline fish found in fresh and brackishwater environments of the Sunderban delta of Bangladesh and India. A fast-growing species with high nutritional value, market demand and hardy nature, M. gulio is a desirable candidate for aquaculture in Asia. It is co-cultured with other brackishwater species in paddy fields, but expansion of culture in pond systems has been held back because of a shortage of seed. This article reports on induced breeding techniques and the development of a farmer-friendly modular hatchery and farming system suitable for use at the homestead level or by small-scale operators.

In pursuit of modernising fish culture practices, novel recirculatory aquaculture systems (RAS) have been introduced in semi-urban areas of West Bengal and other parts of India. While quite a few progressive fish farmers in India have adopted advanced, intensive and imported RAS systems featuring huge plant, other farmers have developed small and indigenous RAS systems that require comparatively low investment. This article discusses the design, principles, state-of-the-art and associated practical aspects of indigenous RAS technology as currently practiced in West Bengal and other places.

Loricariid catfish species of the genus Pterygoplichthys, known in the aquarium trade as 'plecos' and 'algae eaters', have extensively invaded and proliferated in the East Kolkata Wetlands in West Bengal. Loricariids have capacity to alter the ecosystem and biodiversity of invasion sites, by physically altering the invaded habitats and by competing with native animals for food and space. The aquarium trade pathway is the most significant source of loricariid introductions globally. This article discusses the invasion of loricariid catfish in the East Kolkata Wetlands, and the environmental and economic impact on local fishers.

The 84th edition of the Quarterly Aquatic Animal Disease Report contains information from eleven governments. The foreword discusses meetings of the ad hoc Steering Committee of the Regional Collaboration Framework on Aquatic Animal Health in Asia and the Pacific.