Effects of different salinities on the osmoregulatory capacity of Mediterranean sticklebacks living in freshwater

2017 ◽  
Vol 303 (4) ◽  
pp. 270-280 ◽  
Author(s):  
K. Rind ◽  
D. Beyrend ◽  
E. Blondeau-Bidet ◽  
G. Charmantier ◽  
P. Cucchi ◽  
...  
Keyword(s):  
Osmoregulatory Capacity

scholarly journals Inter-population differences in salinity tolerance of adult wild Sacramento splittail: osmoregulatory and metabolic responses to salinity

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Christine E Verhille ◽  
Theresa F Dabruzzi ◽  
Dennis E Cocherell ◽  
Brian Mahardja ◽  
Fred Feyrer ◽  
...  
Keyword(s):  
San Francisco ◽  
Salinity Tolerance ◽  
Plasma Osmolality ◽  
Metabolic Cost ◽  
Central Valley ◽  
Metabolic Responses ◽  
Metabolic Rates ◽  
Spawning Habitat ◽  
Osmoregulatory Capacity ◽  
Sacramento Splittail

Abstract The Sacramento splittail (Pogonichthys macrolepidotus) is composed of two genetically distinct populations endemic to the San Francisco Estuary (SFE). The allopatric upstream spawning habitat of the Central Valley (CV) population connects with the sympatric rearing grounds via relatively low salinity waters, whereas the San Pablo (SP) population must pass through the relatively high-salinity Upper SFE to reach its allopatric downstream spawning habitat. We hypothesize that if migration through SFE salinities to SP spawning grounds is more challenging for adult CV than SP splittail, then salinity tolerance, osmoregulatory capacity, and metabolic responses to salinity will differ between populations. Osmoregulatory disturbances, assessed by measuring plasma osmolality and ions, muscle moisture and Na+-K+-ATPase activity after 168 to 336 h at 11‰ salinity, showed evidence for a more robust osmoregulatory capacity in adult SP relative to CV splittail. While both resting and maximum metabolic rates were elevated in SP splittail in response to increased salinity, CV splittail metabolic rates were unaffected by salinity. Further, the calculated difference between resting and maximum metabolic values, aerobic scope, did not differ significantly between populations. Therefore, improved osmoregulation came at a metabolic cost for SP splittail but was not associated with negative impacts on scope for aerobic metabolism. These results suggest that SP splittail may be physiologically adjusted to allow for migration through higher-salinity waters. The trends in interpopulation variation in osmoregulatory and metabolic responses to salinity exposures support our hypothesis of greater salinity-related challenges to adult CV than SP splittail migration and are consistent with our previous findings for juvenile splittail populations, further supporting our recommendation of population-specific management.

Osmoregulatory capacity at low temperature is critical for insect cold tolerance

2021 ◽  
Vol 47 ◽  
pp. 38-45
Author(s):  
Johannes Overgaard ◽  
Lucie Gerber ◽  
Mads Kuhlmann Andersen
Keyword(s):  
Low Temperature ◽  
Cold Tolerance ◽  
Osmoregulatory Capacity ◽  
Insect Cold Tolerance

Some Effects of Salinity on the Mysid Praunus Flexuosus

1971 ◽  
Vol 51 (3) ◽  
pp. 709-715 ◽  
Author(s):  
D. S. Mclusky ◽  
V. E. J. Heard
Keyword(s):  
Population Dynamics ◽  
Salinity Tolerance ◽  
The Body ◽  
Tolerance Range ◽  
Neomysis Integer ◽  
Body Tissues ◽  
Osmoregulatory Capacity

The population dynamics of the mysid crustacean Praunus flexuosus have been studied at Ardmaddy Bay, Loch Etive. A salinity tolerance range of 2–33‰ has been demonstrated, over which the body tissues experience the range 11–28‰. Comparison is made between the osmoregulatory capacity of Praunus flexuosus and the closely related Neomysis integer.

Long-term hypo-osmoregulatory capacity in downstream migrating Atlantic salmon Salmo salar L. smolts

2014 ◽  
Vol 85 (4) ◽  
pp. 1131-1144 ◽  
Author(s):  
H. A. Urke ◽  
J. V. Arnekleiv ◽  
T. O. Nilsen ◽  
K. J. Nilssen ◽  
L. Rønning ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar ◽  
Osmoregulatory Capacity

scholarly journals The influence of initial developmental status on the life-history of sea trout (Salmo trutta)

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Diego del Villar-Guerra ◽  
Martin H. Larsen ◽  
Henrik Baktoft ◽  
Anders Koed ◽  
Kim Aarestrup
Keyword(s):  
Life History ◽  
Salmo Trutta ◽  
Return Rate ◽  
Life History Strategies ◽  
Passive Integrated Transponder ◽  
Marine Life ◽  
Sea Trout ◽  
Osmoregulatory Capacity ◽  
History Of ◽  
One Year

Abstract Spring migrating sea trout juveniles can be classified as parr, pre-smolt or smolt based on body morphology and osmoregulatory capacity. In this respect, parr are assumed to be less prepared for a marine life and to have lower survival at sea than pre-smolts and smolts. However, the behaviour and survival of these trout phenotypes upon entering the sea is not well known. Using passive integrated transponder telemetry, this study found that the return rate from the sea to the natal river was higher for parr compared to pre-smolts and smolts. Additionally, trout classified as parr generally migrated earlier to the sea and a larger proportion returned to the river after less than one year at sea. The daily mortality rate at sea was comparable among the different phenotypes of trout, suggesting that the higher proportion of returning parr to the river was linked to their shorter duration at sea. These results provide evidence of different life-history strategies for seaward-migrating juvenile sea trout, ultimately affecting their return rate to the natal river. Investigations failing to consider downstream migrating parr and pre-smolts risks neglecting a large part of the anadromous population and may result in inaccurate assessments of sea trout stocks in rivers.

The Relationship between Gill NaK-ATPase Activity and Osmoregulatory Capacity in Various Crabs

1979 ◽  
Vol 52 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Alicia McDonough Spencer ◽  
Ann H. Fielding ◽  
Fred I. Kamemoto
Keyword(s):  
Atpase Activity ◽  
Osmoregulatory Capacity ◽  
The Relationship
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