The influence of ontogenetic diet variation on consumption rate estimates: a marine example

Abstract Consumption rates are the foundation of trophic ecology, yet bioenergetics models used to estimate these rates can lack realism by not incorporating the ontogeny of diet. We constructed a bioenergetics model of a marine predatory fish (tailor, Pomatomus saltatrix) that incorporated high-res...

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Autores principales:	Christopher L. Lawson, Iain M. Suthers, James A. Smith, Hayden T. Schilling, John Stewart, Julian M. Hughes, Stephanie Brodie
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e0ab220a25354a54be85bae22e902cb0
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spelling	oai:doaj.org-article:e0ab220a25354a54be85bae22e902cb02021-12-02T15:08:56ZThe influence of ontogenetic diet variation on consumption rate estimates: a marine example10.1038/s41598-018-28479-72045-2322https://doaj.org/article/e0ab220a25354a54be85bae22e902cb02018-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-28479-7https://doaj.org/toc/2045-2322Abstract Consumption rates are the foundation of trophic ecology, yet bioenergetics models used to estimate these rates can lack realism by not incorporating the ontogeny of diet. We constructed a bioenergetics model of a marine predatory fish (tailor, Pomatomus saltatrix) that incorporated high-resolution ontogenetic diet variation, and compared consumption estimates to those derived from typical bioenergetics models that do not consider ontogenetic diet variation. We found tailor consumption was over- or under-estimated by ~5–25% when only including the most common prey item. This error was due to a positive relationship between mean prey energy density and predator body size. Since high-resolution diet data isn’t always available, we also simulated how increasing dietary information progressively influenced consumption rate estimates. The greatest improvement in consumption rate estimates occurred when diet variation of 2–3 stanzas (1–2 juvenile stanzas, and adults) was included, with at least 5–6 most common prey types per stanza. We recommend increased emphasis on incorporating the ontogeny of diet and prey energy density in consumption rate estimates, especially for species with spatially segregated life stages or variable diets. A small-moderate increase in the resolution of dietary information can greatly benefit the accuracy of estimated consumption rates. We present a method of incorporating variable prey energy density into bioenergetics models.Christopher L. LawsonIain M. SuthersJames A. SmithHayden T. SchillingJohn StewartJulian M. HughesStephanie BrodieNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-13 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Christopher L. Lawson Iain M. Suthers James A. Smith Hayden T. Schilling John Stewart Julian M. Hughes Stephanie Brodie The influence of ontogenetic diet variation on consumption rate estimates: a marine example
description	Abstract Consumption rates are the foundation of trophic ecology, yet bioenergetics models used to estimate these rates can lack realism by not incorporating the ontogeny of diet. We constructed a bioenergetics model of a marine predatory fish (tailor, Pomatomus saltatrix) that incorporated high-resolution ontogenetic diet variation, and compared consumption estimates to those derived from typical bioenergetics models that do not consider ontogenetic diet variation. We found tailor consumption was over- or under-estimated by ~5–25% when only including the most common prey item. This error was due to a positive relationship between mean prey energy density and predator body size. Since high-resolution diet data isn’t always available, we also simulated how increasing dietary information progressively influenced consumption rate estimates. The greatest improvement in consumption rate estimates occurred when diet variation of 2–3 stanzas (1–2 juvenile stanzas, and adults) was included, with at least 5–6 most common prey types per stanza. We recommend increased emphasis on incorporating the ontogeny of diet and prey energy density in consumption rate estimates, especially for species with spatially segregated life stages or variable diets. A small-moderate increase in the resolution of dietary information can greatly benefit the accuracy of estimated consumption rates. We present a method of incorporating variable prey energy density into bioenergetics models.
format	article
author	Christopher L. Lawson Iain M. Suthers James A. Smith Hayden T. Schilling John Stewart Julian M. Hughes Stephanie Brodie
author_facet	Christopher L. Lawson Iain M. Suthers James A. Smith Hayden T. Schilling John Stewart Julian M. Hughes Stephanie Brodie
author_sort	Christopher L. Lawson
title	The influence of ontogenetic diet variation on consumption rate estimates: a marine example
title_short	The influence of ontogenetic diet variation on consumption rate estimates: a marine example
title_full	The influence of ontogenetic diet variation on consumption rate estimates: a marine example
title_fullStr	The influence of ontogenetic diet variation on consumption rate estimates: a marine example
title_full_unstemmed	The influence of ontogenetic diet variation on consumption rate estimates: a marine example
title_sort	influence of ontogenetic diet variation on consumption rate estimates: a marine example
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/e0ab220a25354a54be85bae22e902cb0
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The influence of ontogenetic diet variation on consumption rate estimates: a marine example

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