Direct Effects of Microalgae and Protists on Herring (Clupea harengus) Yolk Sac Larvae

This study investigated effects of microalgae (Rhodomonas baltica) and heterotrophic protists (Oxyrrhis marina) on the daily growth, activity, condition and feeding success of Atlantic herring (Clupea harengus) larvae from hatch, through the end of the endogenous (yolk sac) period. Yolk sac larvae w...

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Main Authors:	Illing, Björn, Moyano, Marta, Niemax, Jan, Peck, Myron A.
Format:	Online
Language:	English
Published:	Public Library of Science 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4452712/

id	pubmed-4452712
recordtype	oai_dc
spelling	pubmed-44527122015-06-09 Direct Effects of Microalgae and Protists on Herring (Clupea harengus) Yolk Sac Larvae Illing, Björn Moyano, Marta Niemax, Jan Peck, Myron A. Research Article This study investigated effects of microalgae (Rhodomonas baltica) and heterotrophic protists (Oxyrrhis marina) on the daily growth, activity, condition and feeding success of Atlantic herring (Clupea harengus) larvae from hatch, through the end of the endogenous (yolk sac) period. Yolk sac larvae were reared in the presence and absence of microplankton and, each day, groups of larvae were provided access to copepods. Larvae reared with microalgae and protists exhibited precocious (2 days earlier) and ≥ 60% increased feeding incidence on copepods compared to larvae reared in only seawater (SW). In the absence and presence of microalgae and protists, life span and growth trajectories of yolk sac larvae were similar and digestive enzyme activity (trypsin) and nutritional condition (RNA-DNA ratio) markedly declined in all larvae directly after yolk sac depletion. Thus, microplankton promoted early feeding but was not sufficient to alter life span and growth during the yolk sac phase. Given the importance of early feeding, field programs should place greater emphasis on the protozooplankton-ichthyoplankton link to better understand match-mismatch dynamics and bottom-up drivers of year class success in marine fish. Public Library of Science 2015-06-02 /pmc/articles/PMC4452712/ /pubmed/26035592 http://dx.doi.org/10.1371/journal.pone.0129344 Text en © 2015 Illing 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.
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Illing, Björn Moyano, Marta Niemax, Jan Peck, Myron A.
spellingShingle	Illing, Björn Moyano, Marta Niemax, Jan Peck, Myron A. Direct Effects of Microalgae and Protists on Herring (Clupea harengus) Yolk Sac Larvae
author_facet	Illing, Björn Moyano, Marta Niemax, Jan Peck, Myron A.
author_sort	Illing, Björn
title	Direct Effects of Microalgae and Protists on Herring (Clupea harengus) Yolk Sac Larvae
title_short	Direct Effects of Microalgae and Protists on Herring (Clupea harengus) Yolk Sac Larvae
title_full	Direct Effects of Microalgae and Protists on Herring (Clupea harengus) Yolk Sac Larvae
title_fullStr	Direct Effects of Microalgae and Protists on Herring (Clupea harengus) Yolk Sac Larvae
title_full_unstemmed	Direct Effects of Microalgae and Protists on Herring (Clupea harengus) Yolk Sac Larvae
title_sort	direct effects of microalgae and protists on herring (clupea harengus) yolk sac larvae
description	This study investigated effects of microalgae (Rhodomonas baltica) and heterotrophic protists (Oxyrrhis marina) on the daily growth, activity, condition and feeding success of Atlantic herring (Clupea harengus) larvae from hatch, through the end of the endogenous (yolk sac) period. Yolk sac larvae were reared in the presence and absence of microplankton and, each day, groups of larvae were provided access to copepods. Larvae reared with microalgae and protists exhibited precocious (2 days earlier) and ≥ 60% increased feeding incidence on copepods compared to larvae reared in only seawater (SW). In the absence and presence of microalgae and protists, life span and growth trajectories of yolk sac larvae were similar and digestive enzyme activity (trypsin) and nutritional condition (RNA-DNA ratio) markedly declined in all larvae directly after yolk sac depletion. Thus, microplankton promoted early feeding but was not sufficient to alter life span and growth during the yolk sac phase. Given the importance of early feeding, field programs should place greater emphasis on the protozooplankton-ichthyoplankton link to better understand match-mismatch dynamics and bottom-up drivers of year class success in marine fish.
publisher	Public Library of Science
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4452712/
_version_	1613230832039755776

Direct Effects of Microalgae and Protists on Herring (Clupea harengus) Yolk Sac Larvae

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