Browse by author
Lookup NU author(s): Dr Rebecca Taylor, Dr Gary Caldwell, Hannah Dunstan, Emeritus Professor Matt Bentley
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
Diatoms that produce toxic oxylipins can be detrimental to the reproductive success of aquatic invertebrates. Despite the potential importance of these toxins in shaping aquatic ecosystems, marine studies to date have focused almost exclusively on planktonic calanoid copepods. The current work examines the response of the benthic harpacticoid copepod, Tisbe holothuriae, to direct exposure to diatom-derived oxylipins and the short-term impact of oxylipin-producing diatom diets on reproductive success. The most toxic oxylipin was the polyunsaturated aldehyde (PUA) 2E,4E-decadienal with an LD50 of 9.3 μM for T. holothuriae nauplii. The least tolerant life-stage was the nauplius followed by adult males then adult females. Short-term exposure to PUA-producing diatoms (Skeletonema marinoi and Melosira nummuloides) in maternal diets had no significant impact on reproductive success compared with non-PUA-producing diets (Skeletonema costatum, Navicula hanseni, Phaeodactylum tricornutum and Tetraselmis suecica). The PUA producers had no negative impact on the survival and development of naupliar stages to adulthood. T. holothuriae expresses a higher degree of tolerance to PUA-producing diatoms than many planktonic calanoids, possibly reflecting a degree of adaptation to higher stress levels associated with the benthos. This is the first study to investigate the reproductive responses of harpacticoid copepods feeding on known PUA-producing diatoms. © 2006 Elsevier B.V. All rights reserved.
Author(s): Taylor RL, Caldwell GS, Dunstan HJ, Bentley MG
Publication type: Article
Publication status: Published
Journal: Journal of Experimental Marine Biology and Ecology
Year: 2007
Volume: 341
Issue: 1
Pages: 60-69
ISSN (print): 0022-0981
ISSN (electronic):
Publisher: Elsevier BV
URL: http://dx.doi.org/10.1016/j.jembe.2006.10.028
DOI: 10.1016/j.jembe.2006.10.028
Altmetrics provided by Altmetric
