Mathematical analysis of effects of morphometric attribute on body weight of <em>Lampetra morii</em> and <em>Lampetra japonica</em>

Li Jun; Dong Yanjiao; Han Yinglun; Liu Xin; Song Tao; Xu Lei; Pang Yue; Li Qingwei

doi:10.3969/j.issn.0253-4193.2017.04.006

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Li Jun, Dong Yanjiao, Han Yinglun, Liu Xin, Song Tao, Xu Lei, Pang Yue, Li Qingwei. Mathematical analysis of effects of morphometric attribute on body weight of Lampetra morii and Lampetra japonica[J]. Haiyang Xuebao, 2017, 39(4): 61-71. doi: 10.3969/j.issn.0253-4193.2017.04.006

Citation:

Li Jun, Dong Yanjiao, Han Yinglun, Liu Xin, Song Tao, Xu Lei, Pang Yue, Li Qingwei. Mathematical analysis of effects of morphometric attribute on body weight of Lampetra morii and Lampetra japonica[J]. Haiyang Xuebao, 2017, 39(4): 61-71. doi: 10.3969/j.issn.0253-4193.2017.04.006

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Mathematical analysis of effects of morphometric attribute on body weight of Lampetra morii and Lampetra japonica

doi: 10.3969/j.issn.0253-4193.2017.04.006

1.
College of Life Science, Liaoning Normal University, Dalian 116081, China;Lamprey Research Center, Liaoning Normal University, Dalian 116081, China;Liaoning Institute of Freshwater Fisheries Sciences, Liaoning Key Laboratory of Aquatic Animal Infectious Diseases Control and Prevention, Liaoyang 111000, China
2.
College of Life Science, Liaoning Normal University, Dalian 116081, China;Lamprey Research Center, Liaoning Normal University, Dalian 116081, China

Received Date: 2016-07-22
Rev Recd Date: 2016-09-01

Abstract

Abstract

To study the relationship between body weight and morphological attributes of Lampetra morii and Lampetra japonica, 314 L. morii and 302 L. japonica were selected to measure 8 morphometric attributes including total length(X₁), trunk length(X₂), tail length(X₃), head length(X₄), snout length(X₅), eye length(X₆), length before the first dorsal fin (X₇), head length behind eye (X₈) and body weight(Y), respectively. The correlation index, path coefficients and determination coefficient are calculated with correlation analysis, path analysis and multivariate analysis, respectively. The multiple regression equations are established with morphometric attributes for the body weight reaching level of significance (P<0.05) and the body weight. The results show that the coefficient of variation of Y of L.morii and L.japonica were the highest value than that of variation of morphological attributes, respectively. And the distribution of body weight of L. morii and L. japonica obeyed normal distribution, respectively. The correlation coefficients between morphological attributes and body weight of L. morii and L. japonica were all at extremely significant level(P<0.01), respectively. Partial regression coefficient of X₁, X₄, X₆ and X₈ for body weight of L. morii were significant (P<0.05) and partial regression coefficient of X₁, X₅ and X₈ for body weight of L. japonica reached extremely significant level(P<0.01). And the path coefficients of X₁, X₄, X₆ and X₈ of L.morii were 0.636、0.202、0.060 and 0.105 and the path coefficients of X₁, X₅ and X₈ of L.japonica were 0.730、0.098 and 0.153. The determination coefficients of X₁ for the body weight of L.morii and L. japonica were larger than that of other morphometric attributes, respecively. The high value of correlation index between morphometric attributes and body weight of L.morii and L.japonicai were 0.855 (r²) and 0.857 (r²), respectively. The multiple regression equations of L. morii and L. japonica were Y=1.502X₁+2.699X₄+8.554X₆+1.915X₈-41.547 and Y=4.895X₁+9.688X₅+6.973X₈-157.460, respectively. In the selection process, total length, head length, eye length and head length behind eye of L. morii and total length, snout length and head length behind eye of L. japonica were considered as a whole, which provided essential theoretical basis and ideal measure for selective breeding of lamprey.
- Lampetra morii,
- Lampetra japonica,
- morphological attributes,
- correlation analysis,
- path analysis

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References(19)

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