Analysis of effect of morphological traits on body weight of male and female pear-shaped ringed edge snail Bellamya purificata

doi:10.16535/j.cnki.dlhyxb.2023-254

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Journal of Dalian Fisheries University ›› 2024, Vol. 39 ›› Issue (4) : 622-633. DOI: 10.16535/j.cnki.dlhyxb.2023-254

Analysis of effect of morphological traits on body weight of male and female pear-shaped ringed edge snail Bellamya purificata

WU Jiaqian，ZHOU Kangqi，ZHANG Caiqun，WEI Xiaokai，YE Hua，PENG Jinxia，LIN Yong，QIN Junqi，CHEN Zhong，LUO Hui，WEI Pinyuan，HE Pingping，PAN Xianhui*

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Abstract

To investigate the correlation between morphological traits and body weight in male and female pear-shaped ringed edge snail Bellamya purificata, 11 traits including body weight, shell width and shell height were measured in 1007 snail samples collected from Guangxi Nanfan Aquatic Breeding Base after sex identification and the correlation among the morphological traits was analyzed by trail analysis and multiple regression analysis. The results showed that there was significant correlation between each morphological trait and each quality trait (P<0.05). The body weight of both male and female snails was mainly affected by shell height, with a flux coefficient of 0.927. The soft body weight was primarily affected by shell height (0.904) in male snail, and by shell width (0.899) in females. Muscle weight was found to be largely influenced by the height of the body snail layer (0.899) in male snails, and by the combined effect of shell width, aperture width, body whorl height, and the spiral height in females. The maximal individual coefficient of determination for body weight of female (0.489) and male (0.281) and soft body weight of male (0.561) was observed in shell height. There were the maximal individual coefficient of determination for soft weight (0.190) and muscle weight (0.080) in female snails in shell width. In summmary, the body weight, soft weight, and muscle weight of male and female snails were shown to have good potential for selection. Shell height should be selected as a key auxiliary selection trait when selecting for higher body weight and soft weight. When muscle weight is used as a selection target, body snail layer height should be used as the main selection trait in male snails, while the effects of shell width, aperture width, and body whorl height should be considered in female snails. In this study, a better equation was established by stepwise multiple regression for body weight, soft body weight, and muscle weight of male and female snails, which provides an important reference basis for the subsequent selection of good pear-shaped ringed edge snail.

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Bellamya purificata / morphological trait / path analysis / regression analysis

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WU Jiaqian, ZHOU Kangqi, ZHANG Caiqun, WEI Xiaokai, YE Hua, PENG Jinxia, LIN Yong, QIN Junqi, CHEN Zhong, LUO Hui, WEI Pinyuan, HE Pingping, PAN Xianhui. Analysis of effect of morphological traits on body weight of male and female pear-shaped ringed edge snail Bellamya purificata[J]. Journal of Dalian Fisheries University, 2024, 39(4): 622-633 https://doi.org/10.16535/j.cnki.dlhyxb.2023-254