Despite their abundance at one time in India and other Asian nations, wild mahseer populations have been declining because of degradation of aquatic ecosystems, urbanisation and indiscriminate fishing. Wild mahseer are populations are presently struggling for their mere existence.

An international workshop on mahseer conservation, propagation and rehabilitation will be held in Bhimtal, India from 23-24 April 2018. The workshop is organised by the ICAR-Directorate of Coldwater Fisheries Research in collaboration with the Coldwater Fisheries Society of India.

BRAQCON 2019 wil cover latest research and development in the broader themes of the conference in the form of special sessions, contributed papers, expert group discussions and brainstorming on issues facing aquaculturists and ecosystem managers in India and around the world. The conference themes include: Brackishwater ecosystems, estuarine biodiversity and conservation; aquaculture production systems; larviculture; fish and shellfish nutrition; environment and climate change; aquatic animal health; socio-economic and livelihood issues; and aquaculture genetics and biotechnology.

Integrated multi-trophic aquaculture is a flexible concept, on which many variations can be developed and should not be viewed as confined to open-water, marine systems. Freshwater integrated multi-trophic aquaculture, perhaps better known as aquaponics, applies the same principles as those used in marine integrated multi-trophic systems. In particular, using plants to reduce phosphorus (and other nutrient) levels in effluents can help farmers meet water quality guidelines and prevent eutrophication in the environment.

This collection contains video recordings of the lectures from the Regional Training Course on Culture-based Fisheries in Inland Waters, held at Nha Trang University, Vietnam. The objective of the course was to provide participants with the skills to assist local communities to plan and manage culture-based fisheries; a relatively simple and low cost technology that can deliver nutritional and economic benefits to rural communities with few livelihood options. The course was sponsored by the United Nations University Fisheries Training Programme.

Use of bioenergetic modelling to calculate stocking densities for mitten crab and mandarin fish in culture-based fisheries.

In this issue:

Regional network on culture-based fisheries and stock enhancement; trout fisheries in the uplands of Arunachal Pradesh - resources and opportunities; empowering young Indian women through entrepreneurship development - opportunities and constraints; a view on murrel (snakehead) fisheries in India; hybrid catfish Clarias batrachus x Heteropneustes fossilis produced by farmers in West Bengal, India; Backyard fish based pig farming using low-cost feed in Arunachal Pradesh - a success story; NACA Newsletter.

In the north-east hill region of India, integrated fish farming is one of the best alternatives for improving livelihoods as most of the houses in rural areas have access to ponds and livestock. Among livestock, pigs are a popular choice, particularly for the tribal population of the region, who account for a major portion of the population. Pigs can fit into diverse systems of management, and can be reared on a wide variety of waste materials.

Among the freshwater catfishes, magur (Clarias batrachus) is in great demand in eastern and north-eastern India; it is revered as highly nutritious and therapeutic in nature. During May-June 2016, Sri Sayer Mohammad Sarkar, an experienced magur breeder and seed producer, has achieved success in producing induced-bred hybrid seed of Heteropneustes fossilis and Clarias batrachus. His breeding protocol and experiences in nursery and growout of hybrid catfish are shared in this article.

Murrels (snakeheads) are the third most important group of freshwater fishes in India after carps and catfishes. Murrels are the most common and dominant group of air breathing freshwater fishes and are highly regarded as food fish. Murrels have a pair of cavities in the pharynx that have folded linings, richly supplied with blood vessels for taking in air. These organs enable these fishes to survive out of water for a few hours or migrate from one pool to another.

Since 2009, tilapia aquaculture has been threatened by mass die-offs in Israel and Ecuador, which have been caused by a novel Orthomyxo-like (RNA) virus named Tilapia lake virus. This has been reported as a newly emerging virus that causes syncytial hepatitis of tilapia. An emergency regional consultation was held in Guangzhou, China from 27-28 September 2017 to discuss and plan actions on the overall prevention and management of this disease.

The potential for augmentation of fish production and fish-based eco-tourism in Arunachal Pradesh are immense. The landscape of the state is characterised by lofty mountains with snow-clad peaks, dense forests, turbulent streams and a rich diversity of flora and fauna. We review the potential of some of the lakes in the region to support trout fisheries for both recreational fishing and eco-tourism, with a view to providing job opportunities for highland communities.

In this issue:

28th NACA Governing Council, Dhaka, Bangladesh; register for the First Regional Training Course on Culture-based Fisheries; 11th Indian Fisheries and Aquaculture Forum, Kochi, 21-24 November; audio recordings for regional feed consultation now available; tilapia lake virus; Proceedings of the International Symposium on Aquatic Animal Health and Epidemiology for Sustainable Asian Aquaculture; ICAR-CIBA launch "Vanami Shrimpapp", a mobile app on Pacific white shrimp (Penaeus vannamei) farming; Pakistan officials train on aquaculture certification.

The 73rd edition of the Quarterly Aquatic Animal Disease Report contains information from 14 governments. The foreword provides a disease advisory on tilapia lake virus (TiLV), an emerging threat to farmed tilapia in the Asia-Pacific region.

Tilapia lake virus (TiLV) is an emerging infectious agent that has recently been identified on three continents. While the link between TiLV and disease outbreaks in Israel and Thailand are well documented, further investigations are being undertaken to determine the significance of TiLV in the other countries. This report summarises the available scientific information on TiLV, including clinical signs, diagnostics and epidemiology. Infection with TiLV in tilapia populations may result in socio economic losses and impacts on food security.

The Asian Institute of Technology (AIT) is launching a new Certificate programme on Sustainable Asian Aquaculture via the AARM Academic programme, for one semester beginning August 2017. This certificate programme is a combination of well-designed course work and hands-on experience in specialised areas (fish/shrimp hatchery or farming). The programme is useful for both students (with credit transfer) and for working professionals and entrepreneurs (without credits).

In this issue:

Inspiring story of aquaculture in Sikkim - a journey from conservation to farming; farming of scampi and tiger shrimp together - a case study from West Bengal; Labeo pangusia - a candidate for diversification of hill aquaculture; sustainability of an integrated livestock-fish-crop farming system as a small scale enterprise; sustainable coastal aquaculture in India; potential scope and prospects of domestic fish market in Chhattisgarh.

Tilapia lake virus (TiLV) is a relatively recent pathogen causing serious mortalities in farmed tilapia. The virus appears to be spreading via the usual pathway of importation of live fish with inadequate regard for biosecurity protocols. Countries that are at risk should establish surveillance for TiLV. Unusual tilapia mortalities should be investigated. Importation of live tilapia should probably be reconsidered until adequate biosecurity arrangements are in place. Links to some recent advisories and publications are provided.

Sikkim is a small Himalayan state of India with three climatic zones ranging from tropical to temperate to alpine. The moderate-cool and warm agro-climatic zones are suitable for farming rainbow trout and exotic carp species, while brown trout hatchery and ranching can be conducted in the alpine areas. We report on the status of exotic carp and trout farming in Sikkim including farming practices, constraints faced by local farmers and possible solutions.

Labeo pangusia is a highly prized hill stream carp found mainly in the deeper pools of upland streams. Heavy fishing pressure has led to depletion of wild populations in recent years and the species is likely to become threatened if a conservation strategy is not developed. We report on an investigation into the reproductive biology of this species and on the result of successful induced breeding trials.

We examined the sustainability and economic viability of a model integrated livestock-fish-crop farming system developed by the Fisheries Research Centre, Assam Agricultural University, over an extended period of 13 years. The system was developed as an ecologically sustainable alternative technology for small and margin farmers. It incorporates two livestock components, pig and poultry, with horticulture and carp polyculture. Analysis of cash flow and benefit-cost ration revealed the system to be economically sustainable over the long term.