Reproductive biology and strategy of <i>Megalobrama terminalis</i> of Xijiang River

????????????????????.????????????????????Megalobrama terminalis????????????????????????????????????????????????????????????????.??????????????245 mm????????260~280 mm?????347 g????????320~480 g.?L50????????????????????????????244.5?232.2 mm.??????1.105?1???????????????????????????.?????????????4—8???????6?????7?????????????????????????.???????????73069??????????118.7?/g?????????????????.?????????????????????????????.?????????????????????????????????????????????.;Knowing fish reproductive strategy is essential for understanding population dynamics. This study intends to investigate the cycle, timing of spawning, length at first maturity, fecundity type and Megalobrama terminalis, one important commercial fishes in Xijiang River order illuminate adaptation strategies M. terminalis with human activity intensifies. The results indicated that average body was 245 mm, dominated concentrated 260-280 mm range, while weight 347 g, 320-480 g range. Length maturity estimated as 244.5 232.2 females males, respectively. ratio males 1.105 1, increase length, showed a trend decreasing then increasing. spawning season from April August, peak early June July, density larvae had close relationship discharge. absolute 73069 oocytes, relative 118.7 oocytes/g gutted weight. positively correlated weight, gonadosomatic index closely related gonadal fatness Under influence intensified activities, adaptive changes terminalis: primary sexual decreased.