Cage culture is rapidly gaining momentum across open water bodies in Kochi, presenting a significant shift in aquaculture practices. While traditionally prevalent in backwaters, this innovative technique is now making strides in public water bodies and quarries, offering a myriad of benefits ranging from boosting fisheries industries to curbing water pollution.
Krishi Vigyan Kendra (KVK), affiliated with the Central Marine Fisheries Research Institute (CMFRI), has emerged as a pioneering force in promoting cage culture, particularly in abandoned quarries, which often pose risks due to their considerable depths, some reaching up to 100 feet.
Shinoj Subramannian, the programme coordinator at KVK, underscores the multifaceted advantages of cage culture in quarries. Notably, this approach enables safe harvesting from deep and potentially hazardous quarries. Genetic improved farmed (GIFT) Tilapia has emerged as the preferred fish species for such environments due to its adaptability and suitability for cage culture.
The district currently boasts over 1,200 fish cages, with 400 active aquaculture practitioners. More than 90% of these cages are situated in open water bodies, depicting a growing interest and uptake of cage culture among local communities. KVK aims to further encourage the utilization of water bodies by both panchayats and individuals.
Raji George, a quarry owner in Peechinikkad, Angamaly, shares her journey into cage culture, highlighting the transformation of her quarry into a thriving aquaculture site. The setting up of cages not only facilitates waste prevention but also fosters environmental stewardship by deterring waste dumping, with support from the fisheries department and the introduction of seeds from MPEDA.
Vikas, an aquaculturist at KVK, underscores the practical benefits of floating cage culture, particularly its ease of harvest. Despite initial challenges, including stocking density management and water quality control, collaborative efforts with experts like Prof. Bright Singh from Cochin University have led to significant advancements in pH management and ammonia control.
However, challenges persist, with limitations on fish species suitable for farming and profitability concerns associated with GIFT Tilapia. KVK officials acknowledge these challenges and are committed to addressing them to ensure the sustained growth of cage culture in Kochi’s water bodies.
