TY - JOUR
T1 - Osmoregulatory changes accompanying smoltification in coho salmon
AU - Loretz, Christopher A.
AU - Collie, Nathan L.
AU - Richman, Nurney H.
AU - Bern, Howard A.
N1 - Funding Information:
Supported in part by NOAA, National Sea Grant College Program, Department of Commerce, under Grant NOAA 04-8-MOl-189, Project R/F-45 through the California Sea Grant College Program. The U.S. Government is authorized to produce and distribute reprints for governmentalp urposes notwithstanding any copyright notation that may appear hereon. Also supported by NSF grant PCM 78-10348 and by NIH fellowship AM-05918 to C.A.L. We also thank the California Department of Fish and Game for their kind cooperation.
PY - 1982/6
Y1 - 1982/6
N2 - During the spring smoltification of the coho salmon (Oncorhynchus kisutch), alterations in osmoregulatory function occur in the urinary bladder, intestine and opercular membrane. Na and Cl reabsorption by the urinary bladder of seawater-adapted fish, initially at freshwater levels, is abolished during the period of smoltification. Intestinal fluid absorption of freshwater-adapted fish increases to seawater levels. The abundance of mitochondria-rich "chloride cells" in freshwater-adapted fish opercular membranes increases. All of these changes occur some weeks after the plasma thyroxine surge and coincide with increased brancial Na,K-ATPase activity. These data suggest that the appropriate time for seawater entry or placement of hatchery-reared coho salmon may be several weeks after the new moon-related thyroxine peak.
AB - During the spring smoltification of the coho salmon (Oncorhynchus kisutch), alterations in osmoregulatory function occur in the urinary bladder, intestine and opercular membrane. Na and Cl reabsorption by the urinary bladder of seawater-adapted fish, initially at freshwater levels, is abolished during the period of smoltification. Intestinal fluid absorption of freshwater-adapted fish increases to seawater levels. The abundance of mitochondria-rich "chloride cells" in freshwater-adapted fish opercular membranes increases. All of these changes occur some weeks after the plasma thyroxine surge and coincide with increased brancial Na,K-ATPase activity. These data suggest that the appropriate time for seawater entry or placement of hatchery-reared coho salmon may be several weeks after the new moon-related thyroxine peak.
UR - http://www.scopus.com/inward/record.url?scp=0343282524&partnerID=8YFLogxK
U2 - 10.1016/0044-8486(82)90009-6
DO - 10.1016/0044-8486(82)90009-6
M3 - Article
AN - SCOPUS:0343282524
SN - 0044-8486
VL - 28
SP - 67
EP - 74
JO - Aquaculture
JF - Aquaculture
IS - 1-2
ER -