No Thumbnail Available

Toxic and sublethal effect of formalin on freshwater fishes

Network of Aquaculture Centres in Asia

Year of publication 1988

Pages p. 821

Author Supranee Chinabut Chalor Limsuwan Kamonporn Tonguthai Temdoung Pungkachonboon;Fisheries and Aquaculture Management Division

Product type Project

Edition 1

Synopsis (short abstract) Toxicity of formalin to three freshwater fish species was determined by using static bioassay. The 96-hour LC50 of formalin on silver barb (Puntius gonionotus Bleeker), common carp (Cyprinus carpio Linn.) and snakehead fish (Channa striatus Flower) were 67–80, 106–128 and 147–166 ppm, respectively. Toxicity of formalin was most obvious during the first 24 hours of exposure. Water pH and hardness had no effect on the toxicity. There were significant differences in percentage weight gain among the control common carp fry and fish treated with 25, 50 and 75 ppm formalin for 8 weeks. Fish exposed to 75 ppm formalin had the lowest growth throughout the 8-week period. However, no histological changes were observed in gills, liver, kidney, spleen digestive tract and muscle of common carp fry exposed to formalin during the 8-week period. No histological changes were found in common carp and snakehead fry that survived from acute toxicity test but hyperplasia of gill lamellae and fatty degenera tion in the liver were observed in silver barb.

Language English

Also available in:
No results found.

Related items

Showing items related by metadata.

  • No Thumbnail Available
    Project
    Aquaculture development and coordination programme. Fish feed technology. Lectures presented at the FAO/UNDP Training Course in Fish Feed Technology, Seattle, Washington, 9 October - 15 December 1978 1980
    Also available in:
    No results found.
    The need for developing suitable feeds based on locally available inexpensive ingredients has been widely recognized. Since lack of trained personnel is the main constraint in the development of fish feed technology in developing countries, the FAO/UNDP Aquaculture Development and Coordination Programme (ADCP) organized a special training course in fish feed technology at the College of Fisheries, University of Washington, Seattle, with a view to forming a small corps of fish feed specialists wh o could then be the focal points for future feed development programmes in their respective countries. The first report of the training course was presented in the report ADCP /REP/79/8. This present volume represents the edited texts of lectures presented by different specialists. Some additional material has been included for more complete coverage of the subject. Together, these texts may be considered to constitute a manual on fish feed technology, even though they were not prepared for that purpose. Twenty-six papers are included, under the general headings: (1) Digestion, physiology and anatomy; (2) nutritional bioenergetics; (3) nutritional biochemistry; (4) feedstuffs; (5) feed formulation; (6) feed manufacturing technology; (7) practical diets; and (8) quality control. Appendices include conversion tables, electrical data, and details on pelletability of selective feedstuffs, pellet die specifications, and equipment requirements for an 8 ton an hour feed mill.
  • Thumbnail Image
    Book (stand-alone)
  • No Thumbnail Available
    Project
    Studies on the effects of fresh and fermented manure on fish production
    Establishment of a Network of Aquaculture Centres in Asia
    1987
    Also available in:
    No results found.
    With chemical fertilizer (N,P) as control, comparative studies were made on the effects of fresh and fermented pig manure on fish production. The results indicated that fish production in ponds supplied with fresh pig manure was the highest, compared to those with fermented pig manure, or control ponds. It appeared that fish in fresh pig-manured ponds not only could utilize bacteria, detritus and plankton, but could also directly feed on pig manure; thus pig manure was utilized better and result ed in higher fish production.
Show more

Users also downloaded

Showing related downloaded files

No results found.