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The effect of high hydrostatic pressure acclimation on acute temperature tolerance and phospholipid fatty acid composition in the shallow-water shrimp Palaemon varians

The effect of high hydrostatic pressure acclimation on acute temperature tolerance and phospholipid fatty acid composition in the shallow-water shrimp Palaemon varians
The effect of high hydrostatic pressure acclimation on acute temperature tolerance and phospholipid fatty acid composition in the shallow-water shrimp Palaemon varians
Extant deep-sea fauna, including hydrothermal vent endemics such as bresiliid shrimp, are descended from shallow-water ancestors. Previous studies have demonstrated the capacity of shallow-water shrimp to acclimate to hydrostatic pressure representative of the vent environment. It has been proposed that this hyperbaric acclimation depends in part on shifts in phospholipid fatty acid composition to maintain biomembrane function. These shifts are also predicted to reduce critical temperature tolerance, potentially limiting the possibility of direct colonisation of the hydrothermal vent environment. Here, we present evidence that acclimation to high hydrostatic pressure (10 MPa ≈ 1000 m water depth) decreases acute temperature tolerance from 30.2 °C to 27.1 °C in the shallow-water shrimp Palaemon varians acclimated to 10 °C. Statistically significant shifts in phospholipid fatty acid composition occurred during exposure to high hydrostatic pressure, suggesting that homeoviscous modifications support shifts in environmental tolerances during hyperbaric acclimation. Despite the reduction in temperature tolerance, P. varians retains sufficient thermal scope to tolerate the thermal regime in the hydrothermal vent environment, allowing for the possibility of direct deep-sea hydrothermal vent colonisation by shallow-water shrimp.
0022-0981
103-109
Brown, Alastair
a2feb629-7d53-4e89-a1c9-cbee6ac3c09b
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
Martinez, Alejandro
e9baf746-7cd1-48b3-b228-e92014ebb132
Pond, David
0c83d1f3-f262-4ab5-9116-ba19e1056406
Oliphant, Andrew
a080aa80-9deb-4e70-aadb-7c0b02600735
Brown, Alastair
a2feb629-7d53-4e89-a1c9-cbee6ac3c09b
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
Martinez, Alejandro
e9baf746-7cd1-48b3-b228-e92014ebb132
Pond, David
0c83d1f3-f262-4ab5-9116-ba19e1056406
Oliphant, Andrew
a080aa80-9deb-4e70-aadb-7c0b02600735

Brown, Alastair, Thatje, Sven, Martinez, Alejandro, Pond, David and Oliphant, Andrew (2019) The effect of high hydrostatic pressure acclimation on acute temperature tolerance and phospholipid fatty acid composition in the shallow-water shrimp Palaemon varians. Journal of Experimental Marine Biology and Ecology, 514-515, 103-109. (doi:10.1016/j.jembe.2019.03.011).

Record type: Article

Abstract

Extant deep-sea fauna, including hydrothermal vent endemics such as bresiliid shrimp, are descended from shallow-water ancestors. Previous studies have demonstrated the capacity of shallow-water shrimp to acclimate to hydrostatic pressure representative of the vent environment. It has been proposed that this hyperbaric acclimation depends in part on shifts in phospholipid fatty acid composition to maintain biomembrane function. These shifts are also predicted to reduce critical temperature tolerance, potentially limiting the possibility of direct colonisation of the hydrothermal vent environment. Here, we present evidence that acclimation to high hydrostatic pressure (10 MPa ≈ 1000 m water depth) decreases acute temperature tolerance from 30.2 °C to 27.1 °C in the shallow-water shrimp Palaemon varians acclimated to 10 °C. Statistically significant shifts in phospholipid fatty acid composition occurred during exposure to high hydrostatic pressure, suggesting that homeoviscous modifications support shifts in environmental tolerances during hyperbaric acclimation. Despite the reduction in temperature tolerance, P. varians retains sufficient thermal scope to tolerate the thermal regime in the hydrothermal vent environment, allowing for the possibility of direct deep-sea hydrothermal vent colonisation by shallow-water shrimp.

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Brown_al._J_Exp_Mar_Biol_Ecol_revised_clean - Accepted Manuscript
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More information

Accepted/In Press date: 20 March 2019
e-pub ahead of print date: 8 April 2019
Published date: 1 May 2019

Identifiers

Local EPrints ID: 430256
URI: http://eprints.soton.ac.uk/id/eprint/430256
ISSN: 0022-0981
PURE UUID: ad442262-84f0-49de-b99a-2e4100873855

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Date deposited: 23 Apr 2019 16:30
Last modified: 07 Oct 2020 06:13

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