ISSN:
1573-5117
Keywords:
Labeo bata
;
age
;
growth
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Age and growth of Labeo bata (Ham.) was studied by the analysis of annuli found on the scale and by length-frequency distribution. The fish attained lengths of 131, 194, 236, 277, 314, 341 and 364 mm at the end of the 1st, 2nd, 3rd, 4th, 5th, 6th and 7th years of life respectively. The increase in length of scale bears a constant relationship with the increase in length of fish, and regression analysis yielded a straight line between scale and body length. Calculated values could be expressed as: Y = −2.534 + 0.064 X The growth rate of the fish was found high during the 1st and 2nd years and decreased gradually afterwards till the 7th year. Both sexes showed more a or less similar growth rate and attained a similar longevity. Growth trend of the fish confirmed the von Bertalanffy growth equation: Lt = 450(l−e−0.2165(t+0.5963)) The seasonal growth curve was chiefly influenced by feeding intensity in fishes of 1st year class while in adults it was affected by feeding intensity as well as by maturation of the gonads.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00030080
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