The WorldFish Rohu Genetic Improvement Program aims to substantially increase aquaculture productivity in Bangladesh by developing and disseminating rapidly growing rohu to farmers. Genetically improved rohu seed will be available in Bangladesh beginning in 2020. These fish are expected to grow 20%–30% more rapidly than currently available seed. WorldFish expects to further improve the rohu growth rate by an average of 5%–10% every 2 years—the age at which new genetically superior parents can be selected and spawned.
A fishers’ women-led Participatory Action Research (PAR) was conducted in 30 homestead ponds to assess the potential for polyculture of Tilapia (Oreochromis niloticus) and major carps Rohu (Labeo rohita) and Catla (Catla catla) in two coastal fishing villages of Bangladesh. Three treatments, namely T1 (Tilapia 200 fish per decimal; 1 decimal=40 m2), T2 (Tilapia 200+ Rohu 32+ Catla 8 fish per decimal) and T3 (Tilapia 200+ Rohu 8+ Catla 32 fish per decimal), each with 5 replicates, were tried in Hossainpur and Anipara villages.
The role of aquatic animals in global food and nutrition security is increasingly recognised. The global demand for fish is increasing, leading to a need to significantly increase its supply. Securing future fish supplies through sustainable production is a challenge as major resources such as fresh water and land are becoming limited worldwide. Aquaculture and capture fisheries face various threats from both human-mediated and natural environmental change, including climate change. Aquaculture systems and practices are vulnerable to such changes.
The Carp Genetic Improvement Program is the only program of its kind in the world concentrating on catla and silver carp as well as being the largest familybased selection program for rohu. The methods are similar to those used to develop faster growing chickens and livestock that have transformed their respective sectors. This brief highlights the methodology of the carp genetic programs.
Rohu (Labeo rohita) is a significant freshwater aquaculture species with approximately 1.8 Mt produced annually. Fin clips obtained from the founders of a newly established Bangladesh-based breeding population (~140 fish from each of the Halda, Jamuna, and Padma rivers) were used to identify 9157 SNPs and 14 411 silicoDArT markers using the Diversity Arrays Technology (DArT) genotyping-by-sequencing platform known as DArTseq. After quality control, 1985 SNPs were retained and used to examine population structure within and among river systems.
In India’s Odisha State, fish farmers have been able to double their production and increase their profits thanks to a carp intensification program supported by WorldFish.
In terms of quantity produced, Catla catla is the sixth most important finfish aquaculture species produced globally in 2015. It is primarily grown in South Asia, often on a small scale in polyculture with other species. In spite of its economic importance, in a number of countries, including Bangladesh, the quality of catla seed produced in hatcheries has historically suffered from high levels of inbreeding, uncontrolled interspecific hybridisation and negative selection.
The coastal zone of southwest Bangladesh, endowed with diverse resources, bears a significant scope in ensuring security of food and livelihood of the coastal poor people. However, the region is highly prone to adverse weather events and environmental changes leading to vulnerability in the agricultural production as well as food security, and livelihood of the people. The uncertainties of the weather and environmental events in the coastal region often affect the potential aquaculture inputs producing industries like fish seeds.
A wide range of chemical and biological products are used in aquaculture to improve the health status and to prevent or cure diseases of cultured animals. The present study aimed to identify the health issues, management practices and occupational health hazards related to shrimp (Penaeus monodon) and prawn (Macrobrachium rosenbergii) farming in the southwest region of Bangladesh.
The present study was carried out to evaluate the kinetics of antibody titers and protective response against A. hydrophila antigen at different age groups of the two species of Indian major carps, catla (Catla catla) and rohu (Labeo rohita).