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Metabolic measurements and parameter estimations for bioenergetics modelling of Pacific Chub Mackerel Scomber japonicus
Author(s) -
Guo Chenying,
Ito Shinichi,
Wegner Nicholas C.,
Frank Laura N.,
Dorval Emmanis,
Dickson Kathryn A.,
Klinger Dane H.
Publication year - 2020
Publication title -
fisheries oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 80
eISSN - 1365-2419
pISSN - 1054-6006
DOI - 10.1111/fog.12465
Subject(s) - scomber , clupea , herring , pelagic zone , bioenergetics , energetics , fishery , sardine , mackerel , fish measurement , clupeidae , biology , respirometry , coregonus , environmental science , oceanography , fish <actinopterygii> , ecology , geology , biochemistry , mitochondrion , microbiology and biotechnology
As a crucial step in developing a bioenergetics model for Pacific Chub Mackerel Scomber japonicus (hereafter chub mackerel), parameters related to metabolism, the largest dissipation term in bioenergetics modelling, were estimated. Swimming energetics and metabolic data for nine chub mackerel were collected at 14°C, a low temperature within the typical thermal range of this species, using variable‐speed swim‐tunnel respirometry. These new data were combined with previous speed‐dependent metabolic data at 18 and 24°C and single‐speed (1 fork length per second: FL/s ) metabolic data at 15 and 20°C to estimate respiration parameters for model development. Based on the combined data, the optimal swimming speed (the swimming speed with the minimum cost of transport, U opt ) was 42.5 cm/s (1.5–3.0 FL/s or 2.1 ± 0.4 FL/s ) and showed no significant dependence on temperature or fish size. The daily mass‐specific oxygen consumption rate ( R , g O 2 g fish −1 day −1 ) was expressed as a function of fish mass ( W ), temperature ( T ) and swimming speed ( U ): R = 0.0103 W −0.490 e (0.0457 T ) e (0.0235 U ) . Compared to other small pelagic fishes such as Pacific Herring Clupea harengus pallasii , Pacific Sardine Sardinops sagax and various anchovy species, chub mackerel respiration showed a lower dependence on fish mass, temperature and swimming speed, suggesting a greater swimming ability and lower sensitivity to environmental temperature variation.