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

2011 ◽  
Vol 214 (7) ◽  
pp. 1109-1117 ◽  
Author(s):  
A. Oliphant ◽  
S. Thatje ◽  
A. Brown ◽  
M. Morini ◽  
J. Ravaux ◽  
...  
Keyword(s):  
Shallow Water ◽  
Thermal Tolerance ◽  
Caridean Shrimp ◽  
Pressure Tolerance ◽  
Tolerance Window

scholarly journals Pressure tolerance of tadpole larvae of the Atlantic ascidian Polyandrocarpa zorritensis: potential for deep-sea invasion

2015 ◽  
Vol 63 (4) ◽  
pp. 515-520
Author(s):  
Paulo Yukio Gomes Sumida ◽  
Arthur Ziggiatti Güth ◽  
Miguel Mies
Keyword(s):  
Hydrostatic Pressure ◽  
Shallow Water ◽  
Vertical Migration ◽  
Deep Sea ◽  
Larval Mortality ◽  
Larval Stages ◽  
Ascidian Species ◽  
Pressure Tolerance ◽  
Settlement And Metamorphosis ◽  
Deep Sea Fauna

Abstract How deep-sea fauna evolved is a question still being investigated. One of the most accepted theories is that shallow water organisms migrated to deeper waters and gave origin to the deep-sea communities. However, many organisms are prevented from performing long vertical migrations by the increasing hydrostatic pressure. Tadpole larvae of the ascidian Polyandrocarpa zorritensis were submitted to pressure treatments of 1, 50, 100 and 200 atm. Survival, settlement and metamorphosis rates were verified after 24 hour incubation in a pressure chamber. The majority of larvae settled (84%, 62%, 83% and 77% respectively) and successfully underwent metamorphosis (93%, 59%, 85% and 60%) in all pressure treatments. Larval mortality was of less than 15% in all treatments, except for the 50 atm treatment, which presented 38% mortality. Nearly 100% of the surviving larvae underwent metamorphosis in the treatments of 1, 50 and 100 atm. However, 1/3 of the individuals were still in their larval stages in the 200 atm treatment and presented delayed development. These data suggest that ascidian larvae can withstand the hydrostatic pressure levels found in the deep-sea. It is therefore feasible that the current abyssal ascidian species may have colonized the deep-sea through vertical migration and in only a few generations.

The effects of temperature and pressure acclimation on the temperature and pressure tolerance of the shallow-water shrimp Palaemonetes varians

2014 ◽  
Vol 161 (3) ◽  
pp. 697-709 ◽  
Author(s):  
Philip New ◽  
Alastair Brown ◽  
Andrew Oliphant ◽  
Philip Burchell ◽  
Adam Smith ◽  
...  
Keyword(s):  
Shallow Water ◽  
Pressure Tolerance ◽  
Effects Of Temperature ◽  
Temperature And Pressure
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