Relationship between river fragment length and persistence of two imperiled great plains cyprinids
Relationship between river fragment length and persistence of two imperiled great plains cyprinids
复制标题
河流碎片长度与两种濒临灭绝的大平原鲤鱼持久性之间的关系
DOI：
10.1080/02705060.2013.785984
复制
发表时间：
2013
影响因子：
1.3
通讯作者：
Aaron C. Urbanczyk
中科院分区：
文献类型：
--
作者：
G. Wilde;Aaron C. Urbanczyk
我们使用Logistic回归对两种危险的远洋产卵鲤科鱼类的持久性进行了模拟，它们是美国德克萨斯州布拉索斯河和威奇托河特有的尖鼻鲤鱼和狭眼鲤鱼。持久度与河段长度呈显著正相关。仍有尖鼻鱼或小眼鱼的河流碎片的平均长度(599±27公里)显著大于没有这些物种的碎片的平均长度(187±20公里)。这两个物种的持久性似乎依赖于河流碎片的存在，足够长的时间让产卵和向上游的鱼苗有时间发展并离开水流进入死水区。
We used logistic regression to model the persistence of two imperiled pelagic-spawning cyprinids, sharpnose shiner Notropis oxyrhynchus and smalleye shiner N. buccula, endemic to the Brazos and Wichita Rivers, Texas, USA. There was a significant positive relationship between persistence and river fragment length. Mean length of river fragments in which sharpnose shiner or smalleye shiner still occur was significantly greater (599 ± 27 km) than the mean length of fragments from which these species were absent (187 ± 20 km). Persistence of both species appears to depend on the presence of river fragments long enough to allow spawned ova and swim-up fry time to develop and move out of the current into the backwater areas.