Index for "Statistics"

Science Note

Science Note Vol. 8 No. 1

MDC suspected that blue catfish Ictalurus furcatus and flathead catfish Pylodictis olivaris were being heavily exploited by anglers in 55,600 acre Harry S. Truman

Reservoir in west-central Missouri. A reward tag study was initiated in 2004 to determine angler exploitation rates for both species.

Science Note

Science Note Vol. 8 No. 8

Detailed information on the level of wood harvested from Missouri’s forests is necessary for intelligent planning and decision making in wood procurement, forest resources management, and forest industry development. Likewise, researchers need current forest industry and industrial roundwood information for planning projects. In the spring of 2013 the Missouri Department of Conservation (MDC) undertook a detailed census of primary wood processors throughout the state, asking for information on their firms from 2012.

Science Note

Science Note Vol. 8 No. 6

The intent of sign stations and archer observations are to monitor trends. While not capable of determining population size, these monitoring efforts provide valuable information on population trends.

Sign station indices can detect large changes in furbearer populations at low cost relative to other methods. The surveys use 36-inch diameter circles of sifted soil, set up every 0.3 miles along shoulders of gravel roads. Within each station is a scent attractant disc. Stations are set up in a day and checked the next day for presence of animal tracks. We use sign station surveys to collect trend data for 8 terrestrial furbearer species.

Since 1983 we have conducted annual surveys of wildlife populations via the archer’s diary survey. Each fall, several thousand archery deer and turkey hunters keep daily sighting records for furbearers, other small game animals, deer, and turkeys. This group provides an important monitoring service and enables us to track population indices and range expansion of select terrestrial species. We use the number of sightings of each species divided by the total number of hours hunted to calculate a sighting rate. Rates are expressed as the number of sightings per 1,000 hours hunted.