Growth morphology of the filtering apparatus of silver carp (Hypophthalmichthys molitrix), 1: gross anatomy state
1981
Jirasek, J. (University of Agriculture, Brno (Czechoslovakia). Faculty of Agronomy, Dept. of Fisheries and Water Protection) | Hampl, A. | Sirotek, D.
In planimetric studies on the filtering and respiratory parts of individual gill arches of the right-hand-side gill apparatus of 30 silver carps aged 1, 2 and 3 years it was found that: (1) The area of the respiratory part increased from the first to the fourth gill arch in all age categories; the area of the filtering part increased from the first to the third arch. (2) The total area of the filtering part of the right-hand-side filtering apparatus was 390, 1440 and 2130 mm('2) in 1-,2-and 3-year-old silver carps. In 2-and 3-year-old fish the increase corresponded to 264.5 and 439.2% respectively. (3) In the second year the growth rate of the filtering part is 10% higher than that of the respiratory part. In the third year the relative growth of the filtering part decreased while that of the respiratory part markedly increased. (4) In 2-and 3-year-old fish the ratio between filtering and respiratory parts was 2:1 and 3:2, respectively.
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