Journal: Fisheries Management and Ecology
Location: Salt River watershed, Wyoming and Idaho, USA

Adult cutthroat trout in the Salt River watershed were tracked from September-October 2005 until August 2006 using implanted radio transmitters. The fish were caught in the main river stem, spent October-March largely sedentery in pools, started to move more in April and then increased May-June for the spawning season, when 44% of the 43 fish remained in Salt River in April 2006, 37% moved to mountain streams, and 19% into spring streams, almost all preferring streams with manmade pools and gravel-cobble riffles. The fish didn’t use streams that dewatered in the summer or were blocked by manmade barriers.

Cutthroat Trout – Oncorhynchus clarkii

Sanderson TB, Hubert WA, 2009. “Movements by adult cutthroat trout in a lotic system: implications for watershed-scale management” Fisheries Management and Ecology, DOI: 10.1111/j.1365-2400.2009.00669.x

Affiliations: USGS, Wyoming Cooperative Fish and Wildlife Research Unit.

Journal: African Journal of Ecology
Location: Marsabit Protected Area, Kenya

The distribution of 9 satellite-collared elephants (4 females, 5 bulls) around a volcanic shield with a forestsavanna habitat mosaic in Marsabit National Park and Reserve, Kenya, was influenced most heavily by proximity to drinking water (24% – 13% for permanent water bodies and 11% for seasonal rivers). Elevation contributed 15% to the variation in distribution, but this is probably because vegetation structure is very dependent on elevation – shrubland contributed 10%, and forest 9%, with elephants preferring high forested elevations in the dry season and low shrubland in the wet season. Human proximity was also significant: distance from human settlements contributed 8% and distance from minor roads 7%. 27% of the variation was not significantly correlated to anything in particular.

Ngene SM, Skidmore AK, Van Gils H, Douglas-Hamilton I, Omondi P, 2009. “Elephant distribution around a volcanic shield dominated by a mosaic of forest and savanna (Marsabit, Kenya)” African Journal of Ecology 47(2): 234-245, doi: 10.1111/j.1365-2028.2008.01018.x

Affiliations: Kenya Wildlife Service; International Institute for Geo-Information Science and Earth Observation (ITC); Save the Elephant Trust.