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- W2038383402 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 252:143-157 (2003) - doi:10.3354/meps252143 Food limitation and growth in temperate epipelagic appendicularians (Tunicata) Ángel López-Urrutia1,*, José Luis Acuña2, Xabier Irigoien1,3, Roger Harris1 1Plymouth Marine Laboratory, Prospect Place, West Hoe, Plymouth PL1 3DH, United Kingdom 2Area de Ecología, Departamento de Biología de Organismos y Sistemas, Universidad de Oviedo, C/Catedrático Rodrigo Uría (s/n), Oviedo 33071, Spain 3Present address: Technological Institute for Fisheries and Food (AZTI), Herrera Kaia Portualde z/g, 20110 Pasaia, Spain *Email: alop@pml.ac.uk ABSTRACT: Through an extensive review of reports on appendicularian ecology, we have developed a set of equations on the feeding, metabolic and growth rates of temperate epipelagic appendicularian species. We have used these equations to study the conditions in which these species are likely to experience food-limited growth. As Oikopleura dioica is the most-studied appendicularian species, we have used equations developed for this one species to construct a metabolic budgetary model. Our results suggest that large O. dioica are less likely to experience food-limited growth than other mesozooplankton, and that growth during early development could be more limited by food concentration in the environment. The degree of food limitation strongly depends on the assimilation efficiency of non-autotrophic material, which comprises a great proportion of the appendicularian diet. However, examination of direct measurements of growth rate over a wide range of food concentrations showed no significant relationship between food concentration and weight-specific growth rates. Temperature alone explained more than 60% of the variance in appendicularian weight-specific growth rates. Since there were no clear differences in the growth rates of different appendicularian species, we have combined the available data to develop a temperature-dependent equation to predict their weight-specific growth rates. We have also modified the growth rate equation to take into consideration the expenditure in house secretion. Combination of this growth rate equation with biomass estimations allows us to evaluate their contribution to secondary production. In contrast with the traditional view of appendicularians as important members of oligotrophic ecosystems, our results show that in the study area their contribution to secondary production was higher during more productive conditions. KEY WORDS: Appendicularian · Growth · Ingestion · Respiration · Oikopleura · Fritillaria Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 252. Online publication date: April 30, 2003 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2003 Inter-Research." @default.
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- W2038383402 title "Food limitation and growth in temperate epipelagic appendicularians (Tunicata)" @default.
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