Comparison of fish fauna among three types of rice fields in the Chikuma River basin
Comparison of fish fauna among three types of rice fields in the Chikuma River basin
复制标题
千曲川流域三类稻田鱼类区系比较
DOI：
10.11369/jji1950.48.19
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Y. Aonuma
中科院分区：
文献类型：
--
作者：
O. Katano;K. Hosoya;K. Iguchi;Y. Aonuma
对长野县千隈河附近稻田的淡水鱼进行了目测普查和网样调查。稻田被分为三种类型。1型梯田，水源来自上层池塘；2型：由排水沟渠供水；rhinogobiussp . or （sensu Kawanabe and Mizuno, 1989）、Misgurnus anguillicaudatusandPseudorasbora parvaa在1型田中大量存在；2型田中分别记录有长颌目和长颌目。OnlyM。在3型野外发现了鳗鲡。鱼类丰度和多样性在类型1和类型2之间差异不显著，但在类型3中差异极低。最近从1、2型稻田到3型稻田的重新排列明显降低了鱼类的丰度和多样性。
Freshwater fish in rice fields near the Chikuma River, Nagano Prefecture, were investigated by visual census and net sampling. The rice fields were classified into three types. Type 1-terraced and supplied with water from an upper pond; type 2-supplied with water from drainage ditches; and type 3-supplied and drained by separate irrigation ditches.Rhinogobiussp.OR (sensu Kawanabe and Mizuno, 1989),Misgurnus anguillicaudatusandPseudorasbora parvawere abundant in type 1 fields, whereasTribolodon hakonensis, Carassiusspp.,M. anguillicaudatusandGnathopogon elongatus elongatuswere recorded in type 2 fields. OnlyM. anguillicaudatuswas found in type 3 fields. The fish abundance and diversity did not differ significantly between type 1 and 2, but was extremely poor in type 3. The recent rearrangement of rice fields from types 1 and 2 to type 3 evidently reduced fish abundance and diversity.