Vol. 37 No. 3, 1998
Comparative Zinc Concentrations in Tissues of Common Carp and Other Aquatic Organisms
Lian-Tien Sun and Sen-Shyong Jeng*
Department of Food Science, College of Fisheries, National Taiwan Ocean University, Keelung, Taiwan 202
Lian-Tien Sun and Sen-Shyong Jeng (1998) Zinc
concentrations in various tissues of 24 aquatic organisms were
measured. Common carp and crucian carp had extraordinarily high zinc
concentrations with mean values of 562 and 634 µg/(g fresh tissue)
respectively, in their digestive tract tissues. They had high zinc
concentrations (usually > 100 g/[g fresh tissue]) in kidney, gill,
skeletal tissues, and spleen, which were not seen in other species.
Concentrations of Cu, Na, K, Ca, and Mg in digestive tract tissues of
common carp and several freshwater fish were found to be similar. High
zinc was found to be specific to common carp. Common carp were reared
from fry to adult fish in the laboratory for 937 d and fed on an
artificial feed containing 25 ppm zinc. Zinc concentrations in the
whole body and digestive tract tissue of the fish were found to be
consistently high throughout the period. The anterior portion of the
digestive tract tissue of common carp had the highest zinc
concentration, 1590 µg/(g fresh tissue), which decreased gradually to
the posterior portion, at about 500 µg/(g fresh tissue).
Key words: Zinc, Common carp, Digestive tract, Viscera of fish.
*Correspondence: Fax: 886-2-24626602. E-mail: A0001@ntou66.ntou.edu.tw