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Carbonic anhydrase and Na/K-ATPase activities during the molt cycle of low salinity-reared white shrimp Litopenaeus vannamei

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Title Carbonic anhydrase and Na/K-ATPase activities during the molt
cycle of low salinity-reared white shrimp Litopenaeus vannamei
Not Available
 
Creator Jasmani,Safiah
Jayasankar,Vidya
Shinji,Junpei
Wilder,Marcy N
 
Subject Carbonic anhydrase
Na/K-ATPase
Litopenaeus vannamei
White shrimp
Osmolality
Osmoregulation
Molt cycle
 
Description Not Available
Changes in hemolymph osmolality, ion concentrations,
and enzymatic activities of carbonic anhydrase
(CA) in the gills and epidermal tissue, and Na/K-ATPase in
the gills during the molt cycle were investigated in the
white shrimp Litopenaeus vannamei. Hemolymph osmolality
was high in the intermolt and early premolt stages,
but started to decrease prior to ecdysis through to postmolt
stages A and B. Changes in Na? and Cl- ion concentrations
paralleled those in hemolymph osmolality. CA
activity levels in the anterior and posterior gills were low at
intermolt stage C0 and premolt stage D0, and maximum at
premolt stage D3. In the epidermal tissue, activity was
relatively high at intermolt stage C0 and premolt stage D0,
but fluctuated towards premolt stage D3 and postmolt stage
A. On the other hand, Na/K-ATPase activity in the gills
decreased between intermolt stage C0 and premolt stage
D2, but increased at premolt stage D3 and postmolt stage A.
The changes in patterns of CA activity during the molt
cycle suggest that CA may be involved in supplying
counter-ions for Na? and Cl- uptake during molting.
Branchial Na/K-ATPase appears to be involved in producing
local osmotic gradients in order to support water
influx across the epithelium.
Not Available
 
Date 2021-09-16T04:34:57Z
2021-09-16T04:34:57Z
2010
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/62601
 
Language English
 
Relation Not Available