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Combining energetic profitability and cover effects to evaluate salmonid habitat quality

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Title: Combining energetic profitability and cover effects to evaluate salmonid habitat quality
Authors: Kawai, Hideyuki Browse this author
Nagayama, Shigeya Browse this author
Urabe, Hirokazu Browse this author
Akasaka, Takumi Browse this author
Nakamura, Futoshi Browse this author →KAKEN DB
Keywords: Drift feeder
Bioenergetics model
Salmonid biomass
Habitat assessment
Issue Date: May-2014
Publisher: Springer
Journal Title: Environmental Biology of Fishes
Volume: 97
Issue: 5
Start Page: 575
End Page: 586
Publisher DOI: 10.1007/s10641-013-0217-4
Abstract: Recent studies have demonstrated that the energetic profitability (net energy intake potential; NEI potential) of a habitat, which is calculated as the gross energy gain from foraging minus the energy expenditure from swimming at a focal point, may be a useful tool for predicting the salmonid biomass. The effectiveness of the NEI potential should be tested in various systems. Even if the NEI potential is validated, its predictive accuracy and transferability could be limited if the cover habitat, which is known to be an important factor for determining salmonid abundance, is not considered. We tested whether the NEI potential is effective for predicting the salmonid biomass even in a stream with abundant cover and whether combining the NEI potential and cover effects can improve the predictability of fish biomass using a generalized linear model. Our results demonstrated that the NEI potential could generally predict the fish biomass (percent deviance explained = 79.9 %), and the model that incorporated both the NEI potential and the cover ratio improved the predictive accuracy (percent deviance explained = 88.5 %). These results suggest that energetic profitability can be an effective indicator for assessing habitat quality and is relatively transferable to other systems. Furthermore, when cover effects are considered, the habitat quality is more accurately represented; thus, combining the energetic profitability and the cover effects might improve the transferability of the assessment across habitats.
Rights: The final publication is available at Springer via
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 中村 太士

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