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Shorter, warmer winters may inhibit production of ephyrae in a population of the moon jellyfish Aurelia aurita

Shorter, warmer winters may inhibit production of ephyrae in a population of the moon jellyfish Aurelia aurita
Shorter, warmer winters may inhibit production of ephyrae in a population of the moon jellyfish Aurelia aurita
Scyphozoan jellyfish blooms display high interannual variability in terms of timing of appearance and size of the bloom. To understand the causes of this variability, the conditions experienced by the polyps prior to the production of ephyrae in the spring were examined. Polyps reared from planula larvae of Aurelia aurita medusae collected from southern England (50°49′58.8; − 1°05′36.9) were incubated under orthogonal combinations of temperature (4, 7, 10 °C) and duration (2, 4, 6, 8 weeks), representing the range of winter conditions in that region, before experiencing an increase to 13 °C. Timing and success of strobilation were recorded. No significant production of ephyrae was observed in any of the 2- and 4-week incubations, or in any 10 °C incubation. Time to first ephyra release decreased with longer winter incubations, and more ephyrae were produced following longer and colder winter simulations. This experiment indicates that A. aurita requires a minimum period of cooler temperatures to strobilate, and contradicts claims that jellyfish populations will be more prevalent in warming oceans, specifically in the context of warmer winter conditions. Such investigations on population-specific ontogeny highlights the need to examine each life stage separately as well as in the context of its environment.
0018-8158
Loveridge, Alexandra
7c2ba4b2-905f-4ec5-8daa-3ad3202d62fa
Lucas, Cathy H.
521743e3-b250-4c6b-b084-780af697d6bf
Pitt, Kylie A.
5aa1bb5c-3ee9-4b32-b27f-1f3373989148
Loveridge, Alexandra
7c2ba4b2-905f-4ec5-8daa-3ad3202d62fa
Lucas, Cathy H.
521743e3-b250-4c6b-b084-780af697d6bf
Pitt, Kylie A.
5aa1bb5c-3ee9-4b32-b27f-1f3373989148

Loveridge, Alexandra, Lucas, Cathy H. and Pitt, Kylie A. (2020) Shorter, warmer winters may inhibit production of ephyrae in a population of the moon jellyfish Aurelia aurita. Hydrobiologia. (doi:10.1007/s10750-020-04483-9).

Record type: Article

Abstract

Scyphozoan jellyfish blooms display high interannual variability in terms of timing of appearance and size of the bloom. To understand the causes of this variability, the conditions experienced by the polyps prior to the production of ephyrae in the spring were examined. Polyps reared from planula larvae of Aurelia aurita medusae collected from southern England (50°49′58.8; − 1°05′36.9) were incubated under orthogonal combinations of temperature (4, 7, 10 °C) and duration (2, 4, 6, 8 weeks), representing the range of winter conditions in that region, before experiencing an increase to 13 °C. Timing and success of strobilation were recorded. No significant production of ephyrae was observed in any of the 2- and 4-week incubations, or in any 10 °C incubation. Time to first ephyra release decreased with longer winter incubations, and more ephyrae were produced following longer and colder winter simulations. This experiment indicates that A. aurita requires a minimum period of cooler temperatures to strobilate, and contradicts claims that jellyfish populations will be more prevalent in warming oceans, specifically in the context of warmer winter conditions. Such investigations on population-specific ontogeny highlights the need to examine each life stage separately as well as in the context of its environment.

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Accepted/In Press date: 26 November 2020
Published date: 14 December 2020

Identifiers

Local EPrints ID: 446008
URI: http://eprints.soton.ac.uk/id/eprint/446008
ISSN: 0018-8158
PURE UUID: a1c892a3-4caf-439c-b750-cc444b4f33f2
ORCID for Cathy H. Lucas: ORCID iD orcid.org/0000-0002-5929-7481

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Date deposited: 19 Jan 2021 17:30
Last modified: 26 Nov 2021 02:37

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Contributors

Author: Cathy H. Lucas ORCID iD
Author: Kylie A. Pitt

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