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Variation in the Allometry of Morphometric Characteristics, Growth, and Condition Factors of Wild Bostrychus sinensis (Butidae) in Northern Vietnam

Variation in the Allometry of Morphometric Characteristics, Growth, and Condition Factors of Wild Bostrychus sinensis (Butidae) in Northern Vietnam

Nam Thanh Nguyen1,2,3, Linh Manh Ha4, Anh Thi Nguyen5, Nam Hoang Chu5, Hau Duc Tran5, Hung Phuc Nguyen5 and Thuy Thi Ta6*

1Faculty of Biology, University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam
2Center for Life Science Research (CELIFE), University of Science, Vietnam National University, 334 Nguyen Trai Thanh Xuan, Hanoi, Vietnam
3Biological Museum, University of Science, Vietnam National University, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam
4Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan
5Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Ha Noi, Viet Nam
6Hanoi Metropolitan University, 98 Duong Quang Ham, Cau Giay, Ha Noi, Viet Nam
 
* Corresponding author: ttthuy@daihocthudo.edu.vn

Fig. 1.

A map showing sampling sites where surveys were carried out in the Ba Lat estuary of the Red River, northern Vietnam. Dash rectangles indicate where B. sinensis specimens were collected.

Fig. 2.

Regression slope values (b) of wild female and male B. sinensis in the dry and wet seasons.

Fig. 3.

Condition factors (K) of wild female and male B. sinensis in the dry and wet seasons.

Fig. 4.

Monthly changes in condition factors of wild B. sinensis, vertical bars showing standard error.

Fig. 5.

Variation of condition factors (K) among body size classes of wild B. sinensis, vertical bars are showing standard error.

Table II.

Length, weight range and regression coefficient of wild B. sinensis over the sampling period. The values given are from the equation W = aTLb; N, number of sample; TL, total length; W, weight; a is intercept and b is slope value of regression; R­2, coefficient of determination; I and +A indicate isometric and positive allometric growth type, respectively.

Pakistan Journal of Zoology

February

Vol. 55, Iss. 1, Pages 1-500

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