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Studies on Growth Condition of Ten Fresh Water Fishes

M.A. Quddus
Department of Agricultural Statistics, Bangladesh Agricultural University, Mymensingh.

Abstract/ Executive Summary:

Regression coefficients between Log-length and Log-weight, correlation coefficients between length and weight and the condition factors of ton fresh water fish species were estimated. The ranges of regression coefficients was from 2.21 to 3. 23, and that of correlation coefficients from 0.95 to 0.99 and the mean condition factor from 0.63 to 1.53. The values of regression coefficients did not differ significantly from the hypothetical value at 5% level of significance except In Pangasius pagasius and Ailia coila. X2 -teat indicated that the population correlation coefficients of the fish species were homogenous.

Keywords: Log-length, Log-weight, Allometric, laometric, Growth condition,

Location: Itna upazila in Kishorgonj

Start Date: 00-01-1988

End Date: 00-02-1988

Program Area: Animal Health and Management

Commodity: Fish

Objectives:

In this study some test-statistic among the regression coefficients and the correlation coefficients of different fishes are established.

Methodology:

Puntius sarana, Silonia silondia, Ompok pabda. Mvstus corwla, Mystus aor, Labeo bata and Eutropichtihys vacha were collected from Dhanu river at Itna upazila in Kishorgonj, Gudusia chapra was collected from Rajdhala beel and Ailia colla from Kangsha river at Purbadhala upazila in Netroknna. Pangasius pangaslus was collected from Dharam beef, Mukterpur, at Dharampasha upazila in Sunamgonj during January to February 1988. Eight individuaIs of each type of fish were randomly selected as a sample. The total length of the fish was measured from anterior part of the head to the farthest tip of the caudal fin with the caudal rays squeezed together in cm. The weight was measured with the help of a scientific balance. For calculating the value of regression coefficeint, correlation co-efficient and condition factors the formula used by Ricker (1963) and Dewan et al. (1973) were followed.

Source of Information: Bangladesh J. Agril. Sci. 18 (1) 45-49 January, 1992

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The values of correlation coefficient ranged from 0.95 to 0.99 which indicated that the relationship between length and weight of all the species were strong & the value of X² was in significant. Thus the homogeneity of the population correlation coefficients of the ten fish species was statistically same. The values of estimated weights were plotted against the total lengths, a slightly fluctuating and almost regular curves were obtained.

Knowledge Management: Journal