本文選題：寡鱗飄魚(yú) + 長(zhǎng)江上游�。� 參考：《水生態(tài)學(xué)雜志》2017年02期

【摘要】：寡鱗飄魚(yú)(Pseudolaubuca engraulis)作為許多肉食性魚(yú)類(lèi)重要的餌料來(lái)源,長(zhǎng)期以來(lái)缺乏對(duì)其早期生活史階段特別是重要產(chǎn)卵場(chǎng)資源量變動(dòng)、早期發(fā)育方面的研究。為探究寡鱗飄魚(yú)早期資源量在金沙江一期工程蓄水前后的變化情況,并了解其早期發(fā)育狀況,于2011-2015年的每年5月5日至7月10日在長(zhǎng)江上游江津斷面進(jìn)行魚(yú)類(lèi)早期資源調(diào)查的同時(shí),對(duì)采集到的魚(yú)卵早期發(fā)育進(jìn)行研究。結(jié)果表明,2011-2015年,寡鱗飄魚(yú)卵苗總徑流量分別為2.964×10~8粒(尾)、2.759×10~8粒(尾)、1.335×10~8粒(尾)、1.758×10~8粒(尾)、3.926×10~8粒(尾);金沙江一期工程蓄水后,江津斷面寡鱗飄魚(yú)卵苗總徑流量和卵苗日均密度均呈逐年遞增趨勢(shì),其產(chǎn)卵量占采樣期間總產(chǎn)卵量的比例(相對(duì)多度)也呈波動(dòng)上升趨勢(shì),已成為蓄水后長(zhǎng)江上游宜賓至江津干流江段產(chǎn)卵規(guī)模最大的產(chǎn)漂流性卵魚(yú)類(lèi);根據(jù)魚(yú)類(lèi)早期發(fā)育結(jié)果,寡鱗飄魚(yú)的平均卵膜徑為(5.44±0.05)mm,平均卵徑為(1.61±0.03)mm,初孵仔魚(yú)平均全長(zhǎng)(5.07±0.07)mm。
[Abstract]:Pseudolaubuca engraulis is an important food source for many carnivorous fish. For a long time, there has been a lack of research on its early life cycle stage, especially on the changes of resource quantity and early development in important ovipositing grounds. In order to investigate the changes of the early resource quantity of the oligosactyly floated fish before and after the water storage in the Jinsha River first stage project, and to understand its early development, The early development of fish eggs collected from May 5 to July 10 of 2011 to 2015 in the Jiang Jin section of the upper reaches of the Yangtze River was investigated in the same time as the early development of fish eggs. The results show that in 2011-2015, the total runoff of Oligophora oligosacearum larvae was 2.964 脳 10 ~ (8) (2.759 脳 10 ~ (8) respectively (1.335 脳 10 ~ (8) (1.758 脳 10 ~ (8) (3.926 脳 10 ~ (8). The total runoff and the average daily density of the eggs in Jiang Jin section increased year by year, and the proportion of egg laying (relative abundance) in the sampling period also showed a fluctuating upward trend. According to the results of early development of fish, the average egg membrane diameter is 5.44 鹵0.05 mm, the average egg diameter is 1.61 鹵0.03 mm, and the average length of newly hatched larvae is 5.07 鹵0.07 mm.
【作者單位】： 中國(guó)水產(chǎn)科學(xué)研究院長(zhǎng)江水產(chǎn)研究所;西南大學(xué)動(dòng)物科技學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51509262) 中國(guó)長(zhǎng)江三峽集團(tuán)公司項(xiàng)目(0799570;0799574)
【分類(lèi)號(hào)】：S932.4

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