Feeding studies take guts - critical review and recommendations of methods for stomach contents analysis in fish - PubMed (original) (raw)

Review

. 2019 Dec;95(6):1364-1373.

doi: 10.1111/jfb.14151. Epub 2019 Nov 7.

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Review

Feeding studies take guts - critical review and recommendations of methods for stomach contents analysis in fish

Per-Arne Amundsen et al. J Fish Biol. 2019 Dec.

Abstract

Studies on the feeding ecology of fish are essential for exploring and contrasting trophic interactions and population and community dynamics within and among aquatic ecosystems. In this respect, many different methods have been adopted for the analysis of fish stomach contents. No consensus has, however, been reached for a standardised methodology despite that for several decades there has been an ongoing debate about which methodical approaches that should be preferred. Here, we critically review and scrutinise methods, addressing their strengths and weaknesses and emphasising inherent problems and possible pitfalls in their use. Although our critical assessment reveals that no completely ideal approach exists, appropriate and reliable procedures can be adopted through careful considerations and implementation. In particular, we advocate that different objectives require different methodical approaches and the choice of method should therefore be closely linked to the research questions that are addressed. For a standardisation of methods, we recommend a combination of the relative-fullness and presence-absence methods as the optimal approach for the commonly applied feeding studies addressing relative dietary composition in terms of prey diversity and abundance. Additionally, we recommend the gravimetric method for objectives related to the quantification of food consumption rates and the numerical method for prey selection studies. DNA-based dietary analysis provides a new and promising complementary approach to visual examination of stomach contents, although some technical challenges still exist. The suggested method standardisation facilitates comparisons across species, ecosystems and time and will enhance the applicability and benefits of fish feeding studies in trophic ecology research.

Keywords: diet; food; foraging; method standardisation; prey consumption; trophic ecology.

© 2019 The Authors. Journal of Fish Biology published by John Wiley & Sons Ltd on behalf of The Fisheries Society of the British Isles.

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REFERENCES

    1. Ahlbeck, I., Hansson, S., & Hjerne, O. (2012). Evaluating fish diet analysis methods by individual-based modelling. Canadian Journal of Fisheries and Aquatic Sciences, 69, 1184-1201.
    1. Alonso, M. K., Crespo, E. A., García, N. A., Pedraza, S. N., Mariotti, P. A., & Mora, N. J. (2002). Fishery and ontogenetic driven changes in the diet of the spiny dogfish, Squalus acanthias, in Patagonian waters, Argentina. Environmental Biology of Fishes, 63, 193-202.
    1. Amacker, T. M., & Alford, J. B. (2017). Selective predation by reintroduced juvenile Lake sturgeon (Acipenser fulvescens) in Ft. Loudoun reservoir, Tennessee (USA). Environmental Biology of Fishes, 100, 1301-1314.
    1. Amundsen, P.-A., Gabler, H.-M., & Staldvik, F. J. (1996). A new method for graphical analysis of feeding strategy from stomach contents data. Journal of Fish Biology, 48, 607-614.
    1. Amundsen, P.-A., & Klemetsen, A. (1986). Within-sample variabilities in stomach contents weight of fish - Implications for field studies of consumption rate. In C. A. Simenstad & G. M. Cailliet (Eds.), Contemporary studies on fish feeding (pp. 307-314). Dordrecht: Dr W. Junk.

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