ISSN:
1573-5133
Keywords:
Centrarchidae
;
Osmoregulation
;
Saltmarsh
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Synopsis Juvenile bluegill,Lepomis macrochirus, collected from Mississippi coastal drainages were held at 0, 5, and 10% S and fed diets containing 0, 2, and 4% dietary NaCl. Over a 58 day period, fish from each of the nine treatments (salinity x diet) were fed ad libitum twice daily for 5 min. Mean treatment growth rates did not differ when adjusted for initial wet weights. Hematocrit and intestinal Na+/K+-ATPase activity also did not differ. All fish maintained in 0% S had a marginally lower plasma osmolality compared to fish held in 5 and 10% S. Plasma Cl concentration of fish held in 0% S receiving the 0% NaCl diet was lower than that of the other eight treatments. Results indicate that coastal juvenile bluegill can exploit waters up to 10% S while consuming prey items containing up to 4% NaCl with no influence on growth or certain osmoregulatory characteristics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00004924
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