Food wastes as fish feeds for polyculture of low-trophic-level fish: bioaccumulation and health risk assessments of heavy metals in the cultured fish

Zhang CHENG, Cheung Lung LAM, Wing Yin MO, Xiang Ping NIE, Wai Ming CHOI, Yu Bon MAN, Ming Hung WONG

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The major purpose of this study was to use different types of food wastes which serve as the major sources of protein to replace the fish meal used in fish feeds to produce quality fish. Two types of food waste-based feed pellets FW A (with cereals) and FW B (with cereals and meat products) and the commercial feed Jinfeng® were used to culture fingerlings of three low-trophic-level fish species: bighead carp, grass carp, and mud carp (in the ratio of 1:3:1) for 1 year period in the Sha Tau Kok Organic Farm in Hong Kong. Heavy metal concentrations in all of the fish species fed with food waste pellets and commercial pellets in Sha Tau Kok fish ponds were all below the local and international maximum permissible levels in food. Health risk assessments indicated that human consumption of the fish fed with food waste feed pellets was safe for the Hong Kong residents. The present results revealed that recycling of food waste for cultivating low-trophic-level fish (mainly herbivores and detritus feeders) is feasible, and at the same time will ease the disposal pressure of food waste, a common problem of densely populated cities like Hong Kong. Copyright © 2016 Springer Berlin Heidelberg.
Original languageEnglish
Pages (from-to)7195-7203
JournalEnvironmental Science and Pollution Research
Volume23
Issue number8
Early online dateMar 2016
DOIs
Publication statusPublished - Apr 2016

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polyculture
Bioaccumulation
Health risks
Heavy Metals
Risk assessment
trophic level
Fish
health risk
bioaccumulation
Heavy metals
Fishes
risk assessment
heavy metal
Food
food
Health
fish
Carps
Hong Kong
cereal

Citation

Cheng, Z., Lam, C. L., Mo, W. Y., Nie, X. P., Choi, W. M., Man, Y. B., et al. (2016). Food wastes as fish feeds for polyculture of low-trophic-level fish: bioaccumulation and health risk assessments of heavy metals in the cultured fish. Environmental Science and Pollution Research, 23(8), 7195-7203.

Keywords

  • Recycling of food wastes
  • Bioaccessibility of heavy metals
  • Carcinogenic risks
  • Non-carcinogenic risks