Environmental effects on the oxygen consumption rate in juvenile Epinephelus fuscoguttatus (Forsskal, 1775)

Okomoda VT 1 , Mithun S 2 , Chatterji A 3 , Effendy MAW 3 , Oladimeji AS 4 , Abol-Munafi AB 5 Show all authors , Alabi KI 6 , Ikhwanuddin M 3 , Martins CO 7 , Hassan A 8

Affiliations 

  • 1 Department of Fisheries and Aquaculture, College of Forestry and Fisheries, University of Agriculture, P.M.B. 2373, Makurdi, Nigeria
  • 2 Department of Aquatic Biology and Fisheries, University of Kerala, Kariavattom, Thiruvananthapuram, Kerala, 695581, India
  • 3 Institute of Aquaculture and Fisheries, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
  • 4 Agricultural Department, National Biotechnology Development Agency (NABDA), Abuja, Nigeria
  • 5 Institute of Aquaculture and Fisheries, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia. munafi@umt.edu.my
  • 6 Department of Agricultural Extension and Management, Federal College of Forestry, Plateau, Jos, Nigeria
  • 7 Faculty of Forestry, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
  • 8 Institute of Aquaculture and Fisheries, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia. anuar@umt.edu.my
Fish Physiol Biochem, 2020 Aug;46(4):1497-1505.
PMID: 32378001 DOI: 10.1007/s10695-020-00807-7

Abstract

This study was designed to optimize the culture conditions of juvenile Epinephelus fuscoguttatus (Forsskål, 1775) under laboratory conditions. To this effect, the rate of oxygen consumption was monitored as an index of stress under different temperature, salinity, pH, photoperiod, and urea concentrations. The result obtained after 12 h of exposure suggests the preference of the juvenile E. fuscoguttatus to a temperature range of 15-25 °C and salinity of 30 ppt. Based on this study, temperature was found to be the most lethal as 100% mortality was observed after 6 h in fish exposure to temperatures above the optimal (≥ 30 °C). However, the oxygen consumption rate was similar under the different pH, photoperiod, and urea concentration tested. It was concluded that water temperature was most critical in terms of respiration physiology of the juvenile E. fuscoguttatus given the range and levels of environmental factors tested in this study.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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