FN Archimer Export Format
PT J
TI Transport-related enzymes and osmo-ionic regulation in a euryhaline freshwater shrimp after transfer to saline media
BT 
AF Asaro, Antonela
   Pinoni, Silvina A.
   Lorin-Nebel, Catherine
   Ituarte, Romina Belén
AS 1:1,2,3;2:1,2,3;3:4;4:5,6;
FF 1:;2:;3:;4:;
C1 IIMYC, 447734, Mar Del Plata, Argentina
   CONICET, 62873, Buenos Aires, Buenos Aires, Argentina
   Universidad Nacional de Mar del Plata, 28233, Mar del Plata, Argentina;
   Universite de Montpellier, 27037, Adaptation Ecophysiologique et Ontogenèse, UMR 9190 MARBEC, Montpellier, France;
   IIMYC, 447734, Biología, Mar Del Plata, Buenos Aires, Argentina
   CONICET, 62873, Buenos Aires, Argentina;
C2 IIMYC, ARGENTINA
   CONICET, ARGENTINA
   UNIV NACL MAR DEL PLATA, ARGENTINA;
   UNIV MONTPELLIER, FRANCE
   IIMYC, ARGENTINA
   CONICET, ARGENTINA;
UM MARBEC
IN WOS Cotutelle UMR
   copubli-int-hors-europe
   copubli-sud
IF 1.4
TC 0
UR https://archimer.ifremer.fr/doc/00845/95654/103422.pdf
LA English
DT Article
DE ;carbonic anhydrase;gills;ionic regulation;Na plus;K plus -ATPase;Palaemon argentinus;(V)-type H plus -ATPase
AB To understand the response of freshwater organisms to rising environmental salinity, it is essential to investigate their osmo-ionic regulatory physiology. Our laboratory experiment investigated the transfer of Palaemon argentinus Nobili, 1901 from 2 ‰ (control condition) to concentrated salinity (15, 25 ‰) for short (6 h), medium (48 h) and long-term (> 504 h) acclimation periods. We measured relevant parameters in the shrimp’s haemolymph, the time course of the response of branchial V-H+-ATPase (VHA), Na+, K+-ATPase (NKA), carbonic anhydrase (CA) activity, and muscle water content. Upon prolonged acclimation to 15 ‰ (hyper-regulating condition), shrimp reached a new steady-state of haemolymph osmolality by tightly adjusting ion concentrations to levels higher than the external medium. While NKA and CA activities recovered their pretransfer levels, the downregulation of VHA suggests other functions rather than ion uptake after prolonged acclimation to 15 ‰. The activity of the three transport-related enzymes remained almost unchanged at the highest salinity (isosmotic condition), leading to increasing osmotic pressure and ion concentration after prolonged acclimation to 25 ‰. Although the freshwater shrimp studied here retains a certain degree of tolerance to high salinity, a common trait in palaemonid shrimps, our results highlight that 25 ‰ represents a significant hypertonic challenge for this species. 
PY 2023
PD DEC
SO Canadian Journal Of Zoology
SN 0008-4301
PU Canadian Science Publishing
VL 101
IS 12
UT 001114018500004
BP 1101
EP 1114
DI 10.1139/cjz-2023-0056
ID 95654
ER

EF