Temperature resistance studies on the deep-sea vent shrimpMirocaris fortunata

Abstract

SUMMARY The shrimp Mirocaris fortunata is a hydrothermal vent species that is found at most vent-sites along the Mid-Atlantic Ridge. This endemic species is found across a hydrothermal gradient, with thermal conditions ranging from 2–9°C in ambient seawater to fairly warm values of about 25°C. We performed in vivo experiments on M. fortunata specimens originating from different sites and depths (850 m to 2300 m), both at atmospheric pressure and in pressurized aquaria, to characterise the upper thermal limits of this species. Atmospheric pressure results show that thermal physiology should be studied at each population's native pressure. At in situ pressure, shrimps from Menez Gwen (850 m depth) and Lucky Strike(1700 m depth) do not survive temperatures of 39°C, and the `loss of equilibrium' response suggests that their critical thermal maximum(Ctmax), is about 36±1°C for both sites. This value is similar to those found for another vent shrimp, Rimicaris exoculata, which is thought to be a more temperature-resistant organism,so temperature resistance does not appear to be a crucial factor for explaining differences in distribution of shrimp species in a given vent site. Finally, the data for both vent shrimps are also comparable to those of other non-vent tropical caridean species.

Biological and environmental rhythms in (dark) deep-sea hydrothermal ecosystems

“…Matabos et al (2015) quantified this to about 60 % of the shrimp abundances (to 69 cm of an emission), confirming previous distributional patterns of shrimp being indicative of fluid exits and characteristic for warmer microhabitats (Cuvelier et al, 2009(Cuvelier et al, , 2011aSarrazin et al, 2015). Their thermal resistance and tolerance corroborates this pattern (Shillito et al, 2006). Because their distribution is linked to the presence of fluid exits and flow, a significant positive correlation between shrimp and temperature would be expected.…”

Characterising multi-level effects of an acute pressure exposure on a shallow-water invertebrate: insights into the kinetics and hierarchy of the stress response

“…Ten shrimp were placed into the IPOCAMP system inside a PVC viewing cage mounted inside the pressure chamber (see Ravaux et al, 2003 andShillito et al, 2006 for schematic diagram and description). The IPOCAMP system was sealed and run at atmospheric pressure (0.1 MPa) for 1 h prior to behavioural analysis to allow the shrimp time to acclimate and recover from any handling stress.…”

“…The IPOCAMP system was sealed and run at atmospheric pressure (0.1 MPa) for 1 h prior to behavioural analysis to allow the shrimp time to acclimate and recover from any handling stress. Behaviour was measured by video recording through a viewing port in the IPOCAMP system lid (Shillito et al, 2006) using an endoscopic camera. Behaviour was recorded for 2 h prior to experimental exposure (baseline measurements); during the 1 min pressure ramp, two hour pressure exposure, and 1 min decompression; and then for 2 h periods at 1 h, 6 h and 24 h post exposure.…”

Pressure tolerance of the shallow-water caridean shrimp Palaemonetes varians across its thermal tolerance window

“…Behavioural observations were conducted using the IPOCAMP TM pressurised incubator previously described by Shillito et al (Shillito et al, 2001;Shillito et al, 2006). Importantly, all air is vented from the IPOCAMP TM system prior to pressurisation.…”