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Temperature alters reproduction and maternal provisioning in a fish ectoparasite

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dc.contributor Coastal Marine Ecosyst Res Ctr CMERC
dc.contributor Deakin Univ
dc.contributor Sch Hlth Med & Appl Sci
dc.contributor Deakin University
dc.contributor Ctr Sustainable Trop Fisheries & Aquaculture
dc.contributor Coll Sci & Engn
dc.contributor Central Queensland University
dc.contributor James Cook Univ
dc.contributor Cent Queensland Univ
dc.contributor Cawthron Inst
dc.contributor James Cook University
dc.contributor Australian Inst Marine Sci PMB 3
dc.contributor Sch Life & Environm Sci Conlan, Jessica A. Hutson, Kate S. Francis, David S. Carton, Alexander G. Brazenor, Alexander K. 2020-10-04T18:57:56Z 2020-10-15T23:06:42Z 2020-10-04T18:57:56Z 2020-10-15T23:06:42Z 2020-09-01
dc.identifier.citation Brazenor AK, Francis DS, Conlan JA, Carton AG, Hutson KS (2020) Temperature alters reproduction and maternal provisioning in a fish ectoparasite. International Journal for Parasitology 50: 839-849
dc.identifier.issn 0020-7519
dc.description.abstract This study quantified the effects of temperature on reproduction and maternal provisioning of the ectoparasite, Neobenedenia girellae (Platyhelminthes: Monogenea), a species known to cause detrimental impacts to aquaculture fishes in tropical and subtropical environments worldwide. At 20 and 25 degrees C, parasites exhibited relatively slower production of larger eggs that were energy-dense. In contrast, parasites at 30 degrees C attained sexual maturity faster, were reproductively active over a shorter period, grew to a smaller size and laid smaller, less energy-rich eggs at a faster rate. As such, parasites exhibited two distinct reproductive patterns in response to temperature: parasites at lower temperatures produced larger eggs with higher energy content, while those at the higher temperature had a higher rate of egg production. Larger eggs produced under cooler conditions were better provisioned with energetic reserves and important, membrane-bound lipids that would likely facilitate larval longevity and development success. This is commensurate with previous observations of epizootics of this parasite species in aquaculture systems during winter. Meanwhile, eggs produced at 30 degrees C contained higher proportions of saturated fatty acids compared with polyunsaturated fatty acids, likely reflecting metabolic regulation of cell membrane fluidity, which is necessary for larvae to survive warm conditions. This study demonstrates that fish ectoparasites have evolved substantial reproductive and metabolic flexibility to maximise infection success under variable environmental conditions. (C) 2020 Published by Elsevier Ltd on behalf of Australian Society for Parasitology.
dc.description.sponsorship The authors would like to thank James Cook University, Australia, and the Marine Aquaculture Research Facility Unit, Australia, for the use of their facilities in the holding of test animals. The Australian Institute of Marine Science provided the use of facilities and equipment for the biochemical analysis of parasite eggs. This work was funded by a James Cook University Development Grant, Parasite cultivation techniques:in vitroandin vivoculture methods for ecological and applied aquatic parasitology research and the New Zealand Ministry of Business, Innovation and Employment, under the programme Aquaculture Health to Maximise Productivity and Security (CAWX1707).
dc.language English
dc.subject Egg volume
dc.subject Parasitology
dc.subject Capsalidae
dc.subject Platyhelminthes
dc.subject Lipid
dc.subject Biochemistry
dc.subject LIFE-HISTORY
dc.subject Lates calcarifer
dc.subject EGG SIZE
dc.title Temperature alters reproduction and maternal provisioning in a fish ectoparasite
dc.type journal article
dc.identifier.doi 10.1016/j.ijpara.2020.03.017
dc.identifier.wos WOS:000569152900011

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