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Diversity and Occurrence of Siphonophores in Irish Coastal Waters

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Diversity and Occurrence of Siphonophores in Irish Coastal Waters UCC Library and UCC researchers have made this item openly available. Please let us know how this has helped you. Thanks! Title The role of fronts, eddies and bubbles on the distribution, abundance and advection of gelatinous zooplankton: new insights for finfish aquaculture Author(s) Haberlin, Damien Publication date 2018 Original citation Haberlin, M. D. 2018. The role of fronts, eddies and bubbles on the distribution, abundance and advection of gelatinous zooplankton: new insights for finfish aquaculture. PhD Thesis, University College Cork. Type of publication Doctoral thesis Rights © 2018, Michael Damien Haberlin. http://creativecommons.org/licenses/by-nc-nd/3.0/ Embargo information Not applicable Item downloaded http://hdl.handle.net/10468/6368 from Downloaded on 2021-10-04T11:57:41Z Ollscoil na hÉireann, Corcaigh National University of Ireland, Cork The role of fronts, eddies and bubbles on the distribution, abundance and advection of gelatinous zooplankton: new insights for finfish aquaculture Thesis presented by Michael Damien Haberlin, B.Sc., M.Sc. for the degree of Doctor of Philosophy University College Cork MaREI: The Marine and Renewable Energy Centre, ERI, University College Cork & BEES: School of Biological, Earth and Environmental Sciences Head of School: Professor Sarah Culloty Academic Supervisors: Dr Thomas K. Doyle and Dr Rob McAllen 23rd March 2018 Table of Contents List of Figures ........................................................................................................... iii Declaration .................................................................................................................. x Acknowledgements ..................................................................................................... xi General Abstract ...................................................................................................... xiii Chapter 1 .................................................................................................................... 1 General Introduction ............................................................................................... 2 Gelatinous zooplankton ....................................................................................... 2 Eddies & Fronts ................................................................................................... 4 Interactions with finfish aquaculture ................................................................. 8 Mitigation ........................................................................................................... 10 Scope of the thesis .............................................................................................. 13 Chapter 2 .................................................................................................................. 15 Diversity and occurrence of siphonophores in Irish coastal waters .................... 16 Abstract ............................................................................................................... 16 Introduction........................................................................................................ 17 Material and Methods ........................................................................................ 19 Results ................................................................................................................ 23 Discussion .......................................................................................................... 29 Chapter 3 .................................................................................................................. 36 The influence of a thermohaline front on the gelatinous zooplankton community of a shelf sea .......................................................................................................... 37 Abstract ............................................................................................................... 37 Introduction........................................................................................................ 37 Material and Methods ........................................................................................ 42 Results ................................................................................................................ 48 Discussion .......................................................................................................... 68 Chapter 4 .................................................................................................................. 76 Warm core eddies create a patchy gelatinous landscape ..................................... 77 Abstract ............................................................................................................... 77 Introduction........................................................................................................ 78 Material and Methods ........................................................................................ 82 Results ................................................................................................................ 88 Discussion ........................................................................................................ 100 i Chapter 5 ................................................................................................................ 109 Investigating the efficacy of bubble curtains as a barrier against jellyfish ...... 110 Abstract ................................................................................................................ 110 Introduction...................................................................................................... 111 Material and Methods ...................................................................................... 116 Results .............................................................................................................. 121 Discussion ........................................................................................................ 129 Chapter 6 ................................................................................................................ 135 Reducing Ectopleura larynx growth on salmon cages: efficacy of a novel non- toxic coating ......................................................................................................... 136 Abstract ............................................................................................................. 136 Introduction...................................................................................................... 137 Materials and Methods .................................................................................... 141 Results .............................................................................................................. 146 Discussion ........................................................................................................ 155 Chapter 7 ................................................................................................................ 161 General Discussion .............................................................................................. 162 Thermohaline fronts: a potential edge over the jellyfish ............................... 165 Fronts and Eddies: the same but different?.................................................... 167 Mitigation against harmful jellyfish ............................................................... 170 Concluding Remarks and future research ...................................................... 172 References................................................................................................................ 177 Appendix A .............................................................................................................. 196 Appendix B .............................................................................................................. 205 Paper I: Haberlin et al., 2016 ................................................................................ 205 Paper II: Minchin et al., 2016 ............................................................................... 219 Paper III: Myles et al., 2017 ................................................................................. 228 ii List of Figures Figure 2.1: The southwest coast of Ireland, with the sample site in Bantry Bay and (inset) historic observations of siphonophores around the Irish coastline. Symbols on the map indicate calycophoran () and physonect (x) sightings. The Roancarrig farm site is represented by the open circle.......................................................................... 19 Figure 2.2: Nanomia bijuga colony from Bantry Bay, September 2015; A, Pneumatophore, nectosome and siphosome, with no nectophores attached; (B-D), N. bijuga nectophores from the same sample as colony in (A); (B) Upper view; (C) Lateral view; (D) Lateral view on the left and proximal view on the right. .............. 24 Figure 2.3: Physonect zooids: A, Nanomia bijuga colony, part of the stem bearing three young cormidia and their tentacles bearing larval tentilla; (B) small developing definitive tricornuate tentilla on an Agalma elegans larva; (C) large definitive tentilla of an adult A. elegans; (D) developing definitive tentilla of an adult A. elegans; (E) A. elegans larva with both larval tentilla and developing definitive tentilla; ped = pedicel, inv = involucrum, cnid = first coil
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