Feeding marbled spinefoot rabbitfish ( Siganus rivulatus ) juveniles with β‐mannanase enzyme: An effective tool to enhance growth and immunity and induce low salinity tolerance

2020 ◽  
Vol 26 (6) ◽  
pp. 1884-1894
Author(s):  
Ahmed E. Sallam ◽  
Hebatollah M. Almisherfi ◽  
Mohamed M. M. El‐Feky ◽  
Heba M. Abdel‐Ghany ◽  
Mohamed El‐S. Salem
Keyword(s):  
Salinity Tolerance ◽  
Low Salinity ◽  
Siganus Rivulatus

Water Permeability of Palaemon Longirostris and other Euryhaline Caridean Prawns

1990 ◽  
Vol 150 (1) ◽  
pp. 145-158
Author(s):  
PETER J. CAMPBELL ◽  
M. B. JONES
Keyword(s):  
Low Temperature ◽  
Salinity Tolerance ◽  
Water Permeability ◽  
Significant Rise ◽  
Physiological Adaptation ◽  
Low Salinity ◽  
Salinity Changes ◽  
Palaemon Elegans ◽  
Palaemon Longirostris ◽  
Experimental Salinity

Water permeability [based on the half-time of exchange of body water with the environment (T1/2)] of the upper estuarine prawn Palaemon longirostris was measured in a range of salinities at 4, 12 and 20°C. Prawns acclimated for 7 days were compared with prawns exposed to acute salinity changes. Acclimation to low salinity and low temperature caused a significant reduction in permeability. Transfer of prawns from 34 to 0.5‰ had no immediate effect on permeability; however, transfer from 0.5 to 34‰ caused an immediate significant rise in permeability. Heart rate of P. longirostris acclimated to 0.5 and 34‰ at 4, 12 and 20°C was unaffected by salinity, but was significantly reduced at low temperature. The permeabilities of three other prawn species (Palaemonetes varians, Crangon crangon and Palaemon elegans), which have different horizontal distributions in estuaries and different salinity tolerance ranges, were also studied and compared with the values obtained for P. longirostris. P. varians and C. crangon showed significantly reduced permeabilities at low compared with high salinities; however, the permeability of P. elegans was unchanged at the two salinities used for this species (22 and 34‰). At each experimental salinity, permeabilities followed the sequence: P. longirostris<P. varians<C. crangon<P. elegans. Results show that reduction of permeability is an important physiological adaptation to life in dilute saline regions and may be involved in separating species with overlapping salinity tolerance ranges.

Low-salinity tolerance of early-stage oyster larvae from a mesohaline estuary

2019 ◽  
Vol 613 ◽  
pp. 97-106 ◽  
Author(s):  
RJ Scharping ◽  
LV Plough ◽  
DW Meritt ◽  
EW North
Keyword(s):  
Salinity Tolerance ◽  
Early Stage ◽  
Low Salinity

Digging out molecular markers associated with low salinity tolerance of Nannochloropsis oceanica through bulked mutant analysis

2019 ◽  
Vol 38 (6) ◽  
pp. 1867-1879
Author(s):  
Sijie Liang ◽  
Zhongyi Zhang ◽  
Hang Liu ◽  
Li Guo ◽  
Shiyang Sun ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Salinity Tolerance ◽  
Nannochloropsis Oceanica ◽  
Mutant Analysis ◽  
Low Salinity

Low-salinity tolerance of juvenile fugu Takifugu rubripes

2005 ◽  
Vol 71 (6) ◽  
pp. 1324-1331 ◽  
Author(s):  
Kyung Mi LEE ◽  
Toyoji KANEKO ◽  
Katsumi AIDA
Keyword(s):  
Salinity Tolerance ◽  
Takifugu Rubripes ◽  
Low Salinity

Distribution and rhythmic locomotor patterns of estuarine and open-shore populations of Carcinus maenas

1992 ◽  
Vol 72 (3) ◽  
pp. 599-609 ◽  
Author(s):  
I. J. McGaw ◽  
E. Naylor
Keyword(s):  
Locomotor Activity ◽  
Salinity Tolerance ◽  
Prolonged Exposure ◽  
Carcinus Maenas ◽  
Salinity Change ◽  
Low Salinity ◽  
Salinity Reduction ◽  
Locomotor Patterns

Populations of Carcinus maenas (Crustacea: Decapoda) from an estuary and from the open shore were compared for salinity tolerance and rhythmic locomotor activity. Estuarine crabs were shown to be predominantly green; red and orange individuals were rare within the estuary in contrast to the open shore. Red crabs were less able to tolerate prolonged exposure to low salinity than green crabs. Spontaneous circatidal rhythms of locomotor activity were similar in red and green forms, but red crabs from the open shore reacted earlier, and were more active upon salinity reduction, than green crabs from the estuary which also showed rapid habituation to episodes of salinity change.

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