No Thumbnail Available

Observations on the efficacy of carbonic acid as anesthetic for Indian major carps

Establishment of a Network of Aquaculture Centres in Asia

Year of publication 1986

Pages p. 8

Author D. Kumer, B. K. Mishra, R. K. Dey & B. Biswas;Fisheries and Aquaculture Management Division

Product type Project

Edition 1

Synopsis (short abstract) Various anaesthetics have been in use in culture fishery operations. The present communication describes the efficacy of carbonic acid as anaesthesis for Indian major carps. Different dose levels were tried and the results discussed. It was observed that at lower concentrations the fish were anaesthetized slowly and less deeply whereas at higher concentrations the effect was rapid with greater sedation. The duration for which the fish could be safely held in the anaesthetizing bath also varied a ccording to the concentra tion of carbonic acid and size of the fish. For smaller fry, the safe dose range of carbonic acid was rather very narrow. No significent differences could be observed between the three species of Indian major carps in their response towards the carbonic acid anaesthesia.

Language English

Also available in:
No results found.

Related items

Showing items related by metadata.

  • Thumbnail Image
    Booklet
    Genetic management of Indian major carps
    Genetics in aquaculture: a case study
    2023
    Also available in:
    No results found.
    Collectively carps represent the largest global aquaculture sector, contributing over 20 percent of global aquaculture production. The Indian major carps including catla (Catla catla), rohu (Labeo rohita) and mrigal (Cirhinnus mrigala) are cultured widely across the Indian sub-continent with the main culture system being a multi-species polyculture in ponds, often including other carp species such as common carp (Cyprinus carpio). This production sector is supported by major seed supply systems producing over 50 billion seed per annum. This case study analyses genetic management of Indian major carps since they were first domesticated with the development of hypophysation techniques in the 1950s. A review of literature and a survey of common hatchery practices identifies significant problems prevalent in the sector brought about by a lack of application of best practices in genetic management resulting in loss of genetic diversity, inbreeding and uncontrolled hybrid introgression. These practices are likely to be impacting negatively on the productivity of the cultured farmed types and will represent a significant challenge to the sector in the long term. This case study identifies some of the root causes of poor genetic management and identifies some of the practices that could bring about an improvement in hatchery management to ensure more sustainable use of these globally important aquaculture species.
  • No Thumbnail Available
    Project
    Histopathology of microsporidia infection in Indian major carp, Labeo rohita (Hamilton)
    Establishment of a Network of Aquaculture Centres in Asia
    1986
    Also available in:
    No results found.
    Extensive renal lesions caused by microsporidian infection were recorded for the first time in the kidneys of Indian major carp, Labeo rohita (Hamilton). Intracellular developmental stages of the parasite caused displacement of the host cell nuclei and ultimately destroyed the renal epithelial cells releasing the parasite into the tubular lumen. In extreme cases, the tubular lumen was found to be completely filled by the microsporidian parasite and there was severe degeneration and necrosis of t he renal tubules. Proliferation of haematopoetic tissue in between the renal tubules was observed. The release of the microsporidian parasite into the renal interstitium provoked granulomatus inflammatory reactions.
  • No Thumbnail Available
    Project
    Preliminary observations on haemosiderosis of carps in India
    Establishment of a Network of Aquaculture Centres in Asia
    1986
    Also available in:
    No results found.
    Heavy deposition of haemosiserin pigments in the liver and ovary of Indian major carp, Catla catla and Chinese silver carp, Hypophthalmichthys molitirx suffering from dropsy has been reported for the first time. Histopathological investigations revealed structural abnormalities such as disruption of normal chordal arrangements of the liver cells and their degeneration and necrosis and also damage of blood vessels in the ovary. Deposition of haemosiderin pigments in the ovary of both healthy and diseased specimens of catla may probably have some relevance with the poor gonadal maturation of the fish.
Show more

Users also downloaded

Showing related downloaded files

No results found.