scholarly journals An Environmental Factor Stimulating Salinity Tolerance and Branchial Chloride Cells in a Euryhaline Teleost Poecilia reticulata

1998 ◽  
Vol 64 (2) ◽  
pp. 329-333 ◽  
Author(s):  
Eishi Arai ◽  
Takahito Shikano ◽  
Yoshihisa Fujio
Keyword(s):  
Environmental Factor ◽  
Salinity Tolerance ◽  
Poecilia Reticulata ◽  
Chloride Cells ◽  
Euryhaline Teleost

Effect of inbreeding on salinity tolerance in the guppy (Poecilia reticulata)

Aquaculture ◽  
2001 ◽  
Vol 202 (1-2) ◽  
pp. 45-55 ◽  
Author(s):  
Takahito Shikano ◽  
Takashi Chiyokubo ◽  
Nobuhiko Taniguchi
Keyword(s):  
Salinity Tolerance ◽  
Poecilia Reticulata

Contrasts in development and smolting of genetically distinct sympatric anadromous and nonanadromous Atlantic salmon, Salmo salar

1991 ◽  
Vol 69 (8) ◽  
pp. 2075-2084 ◽  
Author(s):  
Tim P. Birt ◽  
John M. Green ◽  
William S. Davidson
Keyword(s):  
Atlantic Salmon ◽  
Atpase Activity ◽  
Growth Performance ◽  
Salmo Salar ◽  
Salinity Tolerance ◽  
Condition Factor ◽  
Chloride Cells ◽  
Group Differences ◽  
Atlantic Salmon Salmo Salar ◽  
Breeding Populations

Parameters associated with the parr–smolt transformation were compared in cultured 1+ anadromous and nonanadromous Atlantic salmon derived from wild broodstock collected in Gambo River, Newfoundland. Progeny of nonanadromous salmon were significantly longer at swim-up than progeny of anadromous salmon, although consistent differences in growth performance were not observed during most of the 1 st year of development. Anadromous salmon grew more rapidly than nonanadromous salmon in the spring months during the smolting period. Distinct differences were noted between groups in seasonal levels of body silvering, gill Na+–K+ ATPase activity, and size and number of gill chloride cells. Most male nonanadromous salmon matured as "post-smolts," whereas maturation was not observed among female nonanadromous nor among either sex in the anadromous group. Differences between anadromous and nonanadromous salmon were not observed in seasonal levels of body moisture, plasma Na+ and Cl−, condition factor, or salinity tolerance. Differences noted between groups are probably genetic in nature and suggest that the two forms of salmon in Gambo River represent separate breeding populations.

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