scholarly journals The salinity challenge

2020 ◽  
Vol 225 (3) ◽  
pp. 1047-1048 ◽  
Author(s):  
Dale Sanders
Keyword(s):  
Salinity Challenge

Osmotic and ionic regulation, and kinetic characteristics of a posterior gill (Na+, K+)-ATPase from the blue crab Callinectes danae on acclimation to salinity challenge

2021 ◽  
Vol 168 (6) ◽  
Author(s):  
Daniela P. Garçon ◽  
Francisco A. Leone ◽  
Rogério O. Faleiros ◽  
Marcelo R. Pinto ◽  
Cintya M. Moraes ◽  
...  
Keyword(s):  
Blue Crab ◽  
Ionic Regulation ◽  
Kinetic Characteristics ◽  
Salinity Challenge ◽  
Callinectes Danae

Susceptibility of the Heat-, Acid-, and Bile-Adapted Vibrio vulnificus to Lethal Low-Salinity Stress

2006 ◽  
Vol 69 (12) ◽  
pp. 2924-2928 ◽  
Author(s):  
HIN-CHUNG WONG ◽  
SHU-HUI LIU
Keyword(s):  
Stationary Phase ◽  
Salinity Stress ◽  
Natural Environment ◽  
Food Processing ◽  
Vibrio Vulnificus ◽  
Pathogenic Bacterium ◽  
Protective Response ◽  
Low Salinity ◽  
Salinity Challenge ◽  
Insight Into

As a marine pathogenic bacterium that inhabits seawater or seafood, Vibrio vulnificus encounters low salinity and other stresses in the natural environment and during food processing. This investigation explores the cross-protective response of sublethal heat-, acid-, or bile-adapted V. vulnificus YJ03 against lethal low-salinity stress. Experimental results reveal that the acid (pH 4.4)– and heat (41°C)–adapted V. vulnificus were not cross-protected against the lethal low-salinity challenge (0.04% NaCl). The bile (0.05%)–adapted exponential- and stationary-phase cells were cross-protected against low salinity, whereas low-salinity (0.12% NaCl)–adapted stationary cells were sensitized against 12% bile stress. Results of this study provide further insight into the interaction between low salinity and other common stresses in V. vulnificus.

scholarly journals Age-Dependent Decline in Salinity Tolerance in a Euryhaline Fish

2021 ◽  
Vol 2 ◽  
Author(s):  
Mayu Inokuchi ◽  
Yoko Yamaguchi ◽  
Benjamin P. Moorman ◽  
Andre P. Seale
Keyword(s):  
Environmental Control ◽  
Survival Rates ◽  
Age Related ◽  
Acclimation Period ◽  
Wide Range ◽  
Osmotic Homeostasis ◽  
Age Dependent ◽  
Euryhaline Teleost ◽  
Salinity Challenge ◽  
Effect Of Age

Euryhaline teleost fish are characterized by their ability to tolerate a wide range of environmental salinities by modifying the function of osmoregulatory cells and tissues. In this study, we experimentally addressed the age-related decline in the sensitivity of osmoregulatory transcripts associated with a transfer from fresh water (FW) to seawater (SW) in the euryhaline teleost, Mozambique tilapia, Oreochromis mossambicus. The survival rates of tilapia transferred from FW to SW were inversely related with age, indicating that older fish require a longer acclimation period during a salinity challenge. The relative expression of Na+/K+/2Cl− cotransporter 1a (nkcc1a), which plays an important role in hyposmoregulation, was significantly upregulated in younger fish after SW transfer, indicating a clear effect of age in the sensitivity of branchial ionocytes. Prolactin (Prl), a hyperosmoregulatory hormone in O. mossambicus, is released in direct response to a fall in extracellular osmolality. Prl cells of 4-month-old tilapia were sensitive to hyposmotic stimuli, while those of >24-month-old fish did not respond. Moreover, the responsiveness of branchial ionocytes to Prl was more robust in younger fish. Taken together, multiple aspects of osmotic homeostasis, from osmoreception to hormonal and environmental control of osmoregulation, declined in older fish. This decline appears to undermine the ability of older fish to survive transfer to hyperosmotic environments.

Expression analysis of immune-associated genes in hemocytes of mud crab Scylla paramamosain under low salinity challenge

2020 ◽  
Vol 107 ◽  
pp. 16-25
Author(s):  
Qinsheng Chen ◽  
Yan Zhang ◽  
Qun Zhao
Keyword(s):  
Expression Analysis ◽  
Scylla Paramamosain ◽  
Mud Crab ◽  
Low Salinity ◽  
Salinity Challenge

Survival, Na+/K+-ATPase and lipid responses to salinity challenge in fed and starved white pacific shrimp (Litopenaeus vannamei) postlarvae

Aquaculture ◽  
2004 ◽  
Vol 234 (1-4) ◽  
pp. 497-511 ◽  
Author(s):  
Elena Palacios ◽  
Araceli Bonilla ◽  
Dulce Luna ◽  
Ilie S Racotta
Keyword(s):  
Litopenaeus Vannamei ◽  
Salinity Challenge

Effects of acclimation to brackish water on tolerance of salinity challenge by young-of-the-year Adriatic sturgeon (Acipenser naccarii)

2001 ◽  
Vol 58 (6) ◽  
pp. 1113-1121 ◽  
Author(s):  
D J McKenzie ◽  
E Cataldi ◽  
P Romano ◽  
E W Taylor ◽  
S Cataudella ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Linear Relationship ◽  
Swimming Speed ◽  
Brackish Water ◽  
Swimming Performance ◽  
Ion Homeostasis ◽  
Plasma Osmolality ◽  
Young Of The Year ◽  
Salinity Challenge ◽  
Negative Linear Relationship

The effects of a 24-h salinity challenge in water at 28 g·L–1 on plasma osmotic and ion homeostasis, swimming performance, and exercise respirometry were compared in young-of-the-year Adriatic sturgeon (Acipenser naccarii) maintained in freshwater (FW) or acclimated to brackish water (BW) that was slightly hypertonic to sturgeon plasma at a salinity of 11 g·L–1. Salinity challenge caused a significant increase in plasma osmolality and Na+ and Cl– concentrations in both groups, but this was significantly less severe in the group acclimated to the BW as compared with FW. Salinity challenge elicited a significant and profound decline in maximum sustainable swimming speed (Ucrit) in sturgeon from FW, whereas there was no significant effect on Ucrit in the sturgeon acclimated to BW. A negative linear relationship was revealed between plasma osmolality, Na+ or Cl– concentrations, and Ucrit. These variables appeared to influence Ucrit by increasing costs for locomotion while reducing the sturgeon's capacity for oxygen uptake and muscular work. The results indicate that prior acclimation to mildly hypertonic BW promoted osmoregulatory adaptations that improved the ability of the sturgeon to perform exercise following further increases in water salinity.

scholarly journals Isolation and characterization of a MAPKK gene from Penaeus monodon in response to bacterial infection and low-salinity challenge

2021 ◽  
Vol 20 ◽  
pp. 100671
Author(s):  
Hongdi Fan ◽  
Yundong Li ◽  
Qibin Yang ◽  
Song Jiang ◽  
Lishi Yang ◽  
...  
Keyword(s):  
Bacterial Infection ◽  
Penaeus Monodon ◽  
Low Salinity ◽  
Isolation And Characterization ◽  
Salinity Challenge

Can pikeperch colonise new freshwater systems via estuaries? Evidence from behavioural salinity tests

2008 ◽  
Vol 59 (8) ◽  
pp. 694 ◽  
Author(s):  
Dawn M. Scott ◽  
Johanna Rabineau ◽  
Rod W. Wilson ◽  
Dave J. Hodgson ◽  
J. Anne Brown
Keyword(s):  
Tidal Cycle ◽  
Introduced Fish ◽  
Normal Behaviour ◽  
Respiratory Impairment ◽  
Vertical Movements ◽  
Brackish Waters ◽  
The United Kingdom ◽  
In The Wild ◽  
Physiological Acclimation ◽  
Salinity Challenge

Pikeperch (Sander lucioperca) are non-native in the United Kingdom. It is important to understand how environmental factors, such as salinity, influence the behaviour and activity of introduced fish species to identify their dispersal potential. Previous studies have shown that pikeperch, traditionally recognised as a freshwater fish, can tolerate brackish waters and demonstrate physiological acclimation. However, their behavioural responses to brackish waters are unknown. The aim of the present study was therefore to investigate the activity and swimming behaviour of pikeperch obtained from freshwater canals in southern England. In the laboratory, fish were exposed to a 12-h simulated tidal cycle and a 12-day stepped salinity challenge where salinity was increased by 4 every 2 days, up to a salinity of 20. In both regimes, fish showed increased swimming activity in response to increasing salinity, which may represent an avoidance response. The most dramatic changes, including vertical movements, occurred at salinities above ~16. At these higher salinities, head shaking and coughing behaviours were also observed, suggesting significant stress and respiratory impairment. However, during the simulated tidal cycle, normal behaviour was rapidly restored once salinity was reduced. The results of this study may have implications in understanding the dispersal of non-native fish in the wild.

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