Eualus amandae (Decapoda: Caridea: Thoridae) is an indicator of active venting sites in the Southern Ocean
We report in situ observations that reveal the presence of the thorid genus Eualus at hydrothermally active sites. The shrimp Eualus amandae Nye, Copley & Linse, 2013 was first collected in non-venting sites but near areas of hydrothermal activity, on the East Scotia Ridge segment E9 and in the Kemp Caldera, South Sandwich Arc. During a recent expedition of RV Polarstern, specimens of Eualus amandae were observed via a remotely operated vehicle (ROV) at the East Scotia Ridge segment E2 and Kemp Caldera. The animals were seen in shimmering water sites on pillow basalts and at active hydrothermal orifices, both unambiguously hydrothermally active. These sites were also characterised by other vent marginal fauna, such as deep-water comatulid crinoids or stoloniferean cnidarians. The shrimp family Thoridae is more diverse in Antarctic waters than other shrimp families and these records suggest two independent origins of hydrothermal-related habitats in Lebbeus, and now Eualus. These records expand the understanding of the contribution of geothermal activity to larger patterns of Antarctic deep-sea biodiversity.
KeywordsHydrothermal vent Eurybathy Antarctic shrimp
We thank the scientific cruise leader for JC42, Prof. Alex Rogers, the masters and crews of RRS James Clark Ross and RV Polarstern, especially the technical teams of ROVs Isis and MARUM QUEST, and science teams onboard for logistic, technical, and shipboard support during JC42 and PS119. We thank Sammy De Grave, Cedric d’ Udekem d’Acoz, and an anonymous reviewer for constructive comments that improved our manuscript. We are grateful to NERC for funding the ChEsSo Consortium Grant (NE/DO1249X/1), and to BMBF via Projektträger Jülich (03G0880A) for funding PS119. Studies in the East Scotia Sea were undertaken under permit S3-3/2009 (JC42) issued by the Foreign and Commonwealth Office, London, to section 3 of the Antarctic Act 1994 and permit RAP 2018/064(PS119) issued by the South Georgia and South Sandwich Government.
The ChEsSo research programme was funded by a NERC Consortium Grant (NE/DO1249X/1) and supported by the Census of Marine Life and the Sloan Foundation. PS119 was funded by BMBF via Projektträger Jülich (03G0880A).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
This article does not contain any studies with animals performed by any of the authors.
Sampling and field studies
All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities and are mentioned in the acknowledgements.
Data availability statement
All data generated or analysed during this study are included in this published article and its supplementary information files.
The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.
- Basher Z, Costello MJ (2014) Chapter 5.22. Shrimps (Crustacea: Decapoda). In: De Broyer C, Koubbi P, Griffiths HJ, Raymond B et al (eds) Biogeographic atlas of the Southern Ocean. Scientific Committee on Antarctic Research, Cambridge, pp 190–194Google Scholar
- Bohrmann G (2019) The expedition PS119 of the research vessel POLARSTERN to the eastern Scotia Sea in 2019. Ber Polarforsch Meeresforsch 736 https://doi.org/10.2312/BzPM_0736_2019
- Brandt A, Griffths HJ, Gutt J, Linse K, Schiaparelli S, Ballerini T, Danis B, Pfannkuche O (2014) Challenges of deep-sea biodiversity assessments in the Southern Ocean. Adv Polar Sci 25:204–212Google Scholar
- Brandt A, Ashford O, Spiridonov V (2015) 9. Crustacea (Malacostraca) sampled with the Agassiz trawl during the expedition SO-AntEco. In Griffiths HJ, the scientists of SO-AntEco (ed) RRS James Clark Ross JR15005 Cruise Report www.bodc.ac.uk pp 53–58.
- De Grave SF, Fransen CHJM (2011) Carideorum catalogus: the recent species of the dendrobranchiate, stenopodidean, procarididean and caridean shrimps (Crustacea: Decapoda). Zool Mede Leiden 89:195–589Google Scholar
- Griffiths HJ (2015) Cruise report JR15005. www.bodc.ac.uk.
- Horka I (2017) Evolution, ecology and systematics of symbiotic shrimps (Crustacea: Decapoda: Caridea). Doctoral dissertation, Charles UniversityGoogle Scholar
- Marsh L, Copley JT, Huvenne VAI, Tyler PA, the Isis ROV Facility (2014) Getting the bigger picture: using precision remotely operated vehicle (ROV) videography to acquire high-definition mosaic images of newly discovered hydrothermal vents in the Southern Ocean. Deep-Sea Res II 92:124–135CrossRefGoogle Scholar
- Rogers AD (2010) Chemosynthetic Ecosystems of the Southern Ocean (ChEsSO), RRS James Cook Cruise 42. www.bodc.ac.uk
- Ross DM (1983) Symbiotic relations. In: Bliss D (ed) The biology of Crustacea, vol 7. Academic Press, New York, pp 163–212Google Scholar
- Spiridonov V (2015) 10. Studies on distribution and biology of decapod crustaceans. In Griffiths HJ, the scientists of SO-AntEco (ed) RRS James Clark Ross JR15005 Cruise Report . www.bodc.ac.uk pp 59-64