We attribute the fall peak in scent marking to family groups traveling together to latrine sites and the spring peak in scent marking to communication during the breeding season. Based on seasonal variation in the periodicity of river otter visits and seasonal variation in the intensity of scent ...
River otter, an Oklahoma state species of special concern, is found in eastern parts of the Canadian River. Nonvegetated beaches and sandbars of the Canadian River support breeding populations of the federally endangered interior least tern (Byre 2000). Smooth softshell turtles are commonly found...
Crucian carp (Carassius carassius) and common carp (Cyprinus carpio) were the most important fish in the otter diet, while, and with regard to amphibians only Rana ridibunda was found.Food niche breadth in the warm season was about twice as much as in the cold one. Crucian carp predominate...
"Standing by this new, freely flowing stream, it’s my hope that we have enabled more sea trout to make their way up to the headwaters of the Trennant stream to breed. By removing the barrier, rather than fitting a technical fish pass, we have ensured that it will always work, with ...
it is stealthy and overwhelms with surprise and speed. For prey larger than itself, it often first tires and wounds its victim before administering the coup-de-grace with a surgical bite to the throat. It is relentless and will pursue fish underwater in otter-like fashion as I was able ...
论文 > 毕业论文 > Blackwater River:黑水河 下载文档 收藏 打印 转格式 92阅读文档大小:620.45K36页万百度文库上传于2015-01-10格式:PDF Water quality trends in the Blackwater River watershed, Canaan Valley, West Virginia 热度: 黑水县小黑水河卡龙镇才盖村段防洪治理工程环评报告 ...
Location Devon - UK A branch of the Great Western Railway, connecting Exeter to Barnstaple in Devon, is fondly known as the ‘Tarka Line’. Named after Henry Williamson’s Tarka the Otter, the railway runs along the banks of the River Taw for much of its route, precariously shadowing its...
The highly protected otter, bats, water voles, kingfishers, herons and a plethora of protected bird life, animals and invertebrates, are all put at risk by the removal of bank-side trees, shrubs and in-river flora and fauna. Fish are under tremendous pressure from predation and this form of...
Distribution and movement patterns of male river otters during the breeding season appeared to be influenced by the distribution of females. The spatial organization of the reintroduced population was similar to the spatial organization of native river otter populations. Females exhibited intra-sexual ...
No relationship existed between cutthroat trout abundance and tree ring 15N, precluding the ability to detect whether the trout-otter-excreta link has changed with the cutthroat trout population.;Chapter 4 is a note on seasonal breeding in Yellowstone otters. Although river otters in temperate ...