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A Mechanistic Individual-Based Model of the Feeding Processes for Oikopleura dioica
A mechanistic physiological model of the appendicularian Oikopleura dioica has been built to represent its three feeding processes (filtration, ingestion and assimilation). The mathematical formulation of these processes is based on laboratory observations from the literature, and tests different hy...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3818322/ https://www.ncbi.nlm.nih.gov/pubmed/24223782 http://dx.doi.org/10.1371/journal.pone.0078255 |
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author | Vaugeois, Maxime Diaz, Frédéric Carlotti, François |
author_facet | Vaugeois, Maxime Diaz, Frédéric Carlotti, François |
author_sort | Vaugeois, Maxime |
collection | PubMed |
description | A mechanistic physiological model of the appendicularian Oikopleura dioica has been built to represent its three feeding processes (filtration, ingestion and assimilation). The mathematical formulation of these processes is based on laboratory observations from the literature, and tests different hypotheses. This model accounts for house formation dynamics, the food storage capacity of the house and the gut throughput dynamics. The half-saturation coefficient for ingestion resulting from model simulations is approximately 28 [Image: see text] and is independent of the weight of the organism. The maximum food intake for ingestion is also a property of the model and depends on the weight of the organism. Both are in accordance with data from the literature. The model also provides a realistic representation of carbon accumulation within the house. The modelled half-saturation coefficient for assimilation is approximately 15 [Image: see text] and is also independent of the weight of the organism. Modelled gut throughput dynamics are based on faecal pellet formation by gut compaction. Model outputs showed that below a food concentration of 30 [Image: see text], the faecal pellet weight should represent a lower proportion of the body weight of the organism, meaning that the faecal pellet formation is not driven by gut filling. Simulations using fluctuating environmental food availability show that food depletion is not immediately experienced by the organism but that it occurs after a lag time because of house and gut buffering abilities. This lag time duration lasts at least 30 minutes and can reach more than 2 hours, depending on when the food depletion occurs during the house lifespan. |
format | Online Article Text |
id | pubmed-3818322 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-38183222013-11-09 A Mechanistic Individual-Based Model of the Feeding Processes for Oikopleura dioica Vaugeois, Maxime Diaz, Frédéric Carlotti, François PLoS One Research Article A mechanistic physiological model of the appendicularian Oikopleura dioica has been built to represent its three feeding processes (filtration, ingestion and assimilation). The mathematical formulation of these processes is based on laboratory observations from the literature, and tests different hypotheses. This model accounts for house formation dynamics, the food storage capacity of the house and the gut throughput dynamics. The half-saturation coefficient for ingestion resulting from model simulations is approximately 28 [Image: see text] and is independent of the weight of the organism. The maximum food intake for ingestion is also a property of the model and depends on the weight of the organism. Both are in accordance with data from the literature. The model also provides a realistic representation of carbon accumulation within the house. The modelled half-saturation coefficient for assimilation is approximately 15 [Image: see text] and is also independent of the weight of the organism. Modelled gut throughput dynamics are based on faecal pellet formation by gut compaction. Model outputs showed that below a food concentration of 30 [Image: see text], the faecal pellet weight should represent a lower proportion of the body weight of the organism, meaning that the faecal pellet formation is not driven by gut filling. Simulations using fluctuating environmental food availability show that food depletion is not immediately experienced by the organism but that it occurs after a lag time because of house and gut buffering abilities. This lag time duration lasts at least 30 minutes and can reach more than 2 hours, depending on when the food depletion occurs during the house lifespan. Public Library of Science 2013-11-05 /pmc/articles/PMC3818322/ /pubmed/24223782 http://dx.doi.org/10.1371/journal.pone.0078255 Text en © 2013 Vaugeois et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Vaugeois, Maxime Diaz, Frédéric Carlotti, François A Mechanistic Individual-Based Model of the Feeding Processes for Oikopleura dioica |
title | A Mechanistic Individual-Based Model of the Feeding Processes for Oikopleura dioica
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title_full | A Mechanistic Individual-Based Model of the Feeding Processes for Oikopleura dioica
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title_fullStr | A Mechanistic Individual-Based Model of the Feeding Processes for Oikopleura dioica
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title_full_unstemmed | A Mechanistic Individual-Based Model of the Feeding Processes for Oikopleura dioica
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title_short | A Mechanistic Individual-Based Model of the Feeding Processes for Oikopleura dioica
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title_sort | mechanistic individual-based model of the feeding processes for oikopleura dioica |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3818322/ https://www.ncbi.nlm.nih.gov/pubmed/24223782 http://dx.doi.org/10.1371/journal.pone.0078255 |
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