Life-history Traits of the Freshwater Garfish Xenentodon cancila (Hamilton 1822) (Belonidae) in the Ganges River, Northwestern Bangladesh

被引:0
作者
Hossain, Md. Yeamin [1 ,2 ]
Jewel, Md. Abu Sayed [1 ]
Rahman, Md. Mosaddequr [1 ]
Haque, A. B. M. Mohidul [1 ]
Elbaghdady, Heba Allah M. [3 ]
Ohtomi, Jun [2 ]
机构
[1] Rajshahi Univ, Fac Agr, Dept Fisheries, Rajshahi 6205, Bangladesh
[2] Kagoshima Univ, Fac Fisheries, Kagoshima 8900056, Japan
[3] Mansoura Univ, Fac Sci, Dept Zool, Mansoura, Egypt
来源
SAINS MALAYSIANA | 2013年 / 42卷 / 09期
关键词
Bangladesh; Ganges River; Garfish; life-history; Xenentodon cancila; LENGTH-WEIGHT RELATIONSHIPS; MATHABHANGA RIVER; FISHES;
D O I
暂无
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The freshwater garfish, Xenentodon cancila (Hamilton 1822), is one of the commercially important, nutritionally valuable food fish in Asian countries, but the natural populations are seriously decreasing due to high fishing pressure and other factors. This study describes the life history traits, including sex ratio (SR), length-frequency distributions (LFDs), length-weight relationships (LWRs), length-length relationships (LLRs), condition factors (Allometric, K-A; Fulton's, K-F; relative condition, K-R; relative weight, W-R) and form factor (a(3.0)) of X. cancila in the Ganges (Padma) River, northwestern Bangladesh. A total of 175 specimens ranging from 10.50-21.00 cm TL (total length) and 1.44-20.67 g BW (body weight) were investigated in this study. Sampling was done using traditional fishing gears from April 2011 to March 2012. The overall sex ratio showed no significant differences from the expected value of 1:1 (chi(2) = 1,.2 = 0.28, p<0.05), whereas significant difference was found in the LFD (TL) between the sexes (Two tailed, p<0.001). The allometric coefficient b for the LWR indicated positive allometric growth in males, females and combined sexes. The results further indicated that the LLRs were highly correlated. Both K-R and K-F showed significant variations (Two tailed, p<0.001) between male and female. Also, W-R was significantly different from 100 for both sexes (p<0.01), indicating the imbalance habitat with food availability relative to the presence of predators for X. cancila. The calculated values of a(3.0) were as 0.0304, 0.0268 and 0.0252 for males, females and combined sexes of X. cancila. This study reports the first complete and comprehensive description of life-history traits for X. cancila from Bangladeshi waters. The data should be useful for the sustainable conservation of this critically endangered fishery in Bangladesh and neighboring countries.
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收藏
页码:1207 / 1218
页数:12
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