English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/151046
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Feeding behaviour of the nauplii of the marine calanoid copepod Paracartia grani Sars: Functional response, prey size spectrum, and effects of the presence of alternative prey

AuthorsHelenius, Laura K.; Saiz, Enric
Issue DateMar-2017
PublisherPublic Library of Science
CitationPLoS ONE 12(3): e0172902 (2017)
AbstractLaboratory feeding experiments were conducted to study the functional response and prey size spectrum of the young naupliar stages of the calanoid copepod Paracartia grani Sars. Experiments were conducted on a range of microalgal prey of varying sizes and motility patterns. Significant feeding was found in all prey of a size range of 4.5-19.8 μm, with Holling type III functional responses observed for most prey types. The highest clearance rates occurred when nauplii fed on the dinoflagellate Heterocapsa sp. and the diatom Thalassiosira weissflogii (respectively, 0.61 and 0.70 mL ind d), suggesting an optimal prey:predator ratio of 0.09. Additional experiments were conducted to examine the effects of the presence of alternative prey (either Heterocapsa sp. or Gymnodinium litoralis) on the functional response to the haptophyte Isochrysis galbana. In the bialgal mixtures, clearance and ingestion rates of I. galbana along the range of the functional response were significantly reduced as a result of selectivity towards the larger, alternative prey. Paradoxically, relatively large prey trigger a perception response in the nauplii, but most likely such prey cannot be completely ingested and a certain degree of sloppy feeding may occur. Our results are further evidence of the complex prey-specific feeding interactions that are likely to occur in natural assemblages with several available prey types
Description20 pages, 6 figures, 4 tables, supporting information https://doi.org/10.1371/journal.pone.0172902.s001, data availability https://doi.pangaea.de/10.1594/PANGAEA.872504
Publisher version (URL)https://dx.doi.org/10.1371/journal.pone.0172902
Identifiersdoi: 10.1371/journal.pone.0172902
e-issn: 1932-6203
Appears in Collections:(ICM) Artículos
Files in This Item:
File Description SizeFormat 
Helenius_Saiz_2017.pdf521,85 kBAdobe PDFThumbnail
Helenius_Saiz_si.pdf118,07 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.