The effects of food and temperature on settlement of Aurelia aurita planula larvae and subsequent somatic growth
The effects of food and temperature on settlement of Aurelia aurita planula larvae and subsequent somatic growth
The occurrence and magnitude of coastal scyphozoan jellyfish blooms can only be predicted with knowledge of how the environment influences every stage of the life cycle. This study provides the first information on the effects of food and temperature on the settlement of Aurelia aurita planulae. Planulae from mature medusae collected in southern England (50° 48? 3.86? N, 1° 25? 23.06? W) were used for experiments. They were introduced to six different treatments: three temperatures (6 °C, 12 °C, 18 °C) at both high and low food feeding regimes. Although settling rate was faster at higher temperatures, significantly fewer planulae settled at the highest temperature. Four types of asexual reproduction were observed in the high food treatments at higher temperatures. Temperature had a significant positive effect on somatic growth of scyphistomae. Food had a significant positive effect on the somatic growth of those with four and more tentacles, and the interaction of the two had a significant positive effect on those with eight and sixteen tentacles.
Aurelia aurita, Jellyfish, Planula larvae, Scyphistoma, Scyphozoa, Settlement
50-55
Webster, Clare N.
ab7947e6-79b9-4108-94de-82a77211a0e3
Lucas, Cathy H.
521743e3-b250-4c6b-b084-780af697d6bf
15 December 2012
Webster, Clare N.
ab7947e6-79b9-4108-94de-82a77211a0e3
Lucas, Cathy H.
521743e3-b250-4c6b-b084-780af697d6bf
Webster, Clare N. and Lucas, Cathy H.
(2012)
The effects of food and temperature on settlement of Aurelia aurita planula larvae and subsequent somatic growth.
Journal of Experimental Marine Biology and Ecology, 436-437, .
(doi:10.1016/j.jembe.2012.08.014).
Abstract
The occurrence and magnitude of coastal scyphozoan jellyfish blooms can only be predicted with knowledge of how the environment influences every stage of the life cycle. This study provides the first information on the effects of food and temperature on the settlement of Aurelia aurita planulae. Planulae from mature medusae collected in southern England (50° 48? 3.86? N, 1° 25? 23.06? W) were used for experiments. They were introduced to six different treatments: three temperatures (6 °C, 12 °C, 18 °C) at both high and low food feeding regimes. Although settling rate was faster at higher temperatures, significantly fewer planulae settled at the highest temperature. Four types of asexual reproduction were observed in the high food treatments at higher temperatures. Temperature had a significant positive effect on somatic growth of scyphistomae. Food had a significant positive effect on the somatic growth of those with four and more tentacles, and the interaction of the two had a significant positive effect on those with eight and sixteen tentacles.
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Published date: 15 December 2012
Keywords:
Aurelia aurita, Jellyfish, Planula larvae, Scyphistoma, Scyphozoa, Settlement
Organisations:
Ocean Biochemistry & Ecosystems
Identifiers
Local EPrints ID: 345122
URI: http://eprints.soton.ac.uk/id/eprint/345122
ISSN: 0022-0981
PURE UUID: 3ed8bc7e-475b-4085-b368-5f47b2df7989
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Date deposited: 08 Nov 2012 13:57
Last modified: 15 Mar 2024 02:47
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Author:
Clare N. Webster
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