Showing papers on "Mist net published in 2002"
TL;DR: In this paper, the results of point-count and mist-net surveys during the breeding and post-breeding seasons in four Missouri Ozark habitats were compared, and the results showed that there was a greater decrease from breeding to post breeding season in mist net captures than point count detections.
Abstract: We compared the results of point-count and mist-net surveys during the breeding and post-breeding seasons in four Missouri Ozark habitats: mature upland forest, mature riparian forest, 9- to 10-yr-old upland forest and 3- to 4-yr-old upland forest created by clearcutting. We determined whether differences in abundance estimates among habitats or between breeding and post-breeding seasons varied with survey method (i.e., habitat x method, season x method, or habitat x season x method interaction effects), The habitat x method interaction was significant for 13 of 16 species. The general pattern was for canopy or sub-canopy species to be detected by point counts more often in the mature-forest habitats, and to be detected by mist nets more often in the young-forest habitats. The season x method interaction was significant for 6 species largely because there was a greater decrease from breeding to post breeding season in mist-net captures than point-count detections. Two species had a significant habitat x season x method interaction. Differences in the patterns in abundance among habitats and between seasons, by survey method, are indicative of bias in the survey methods. Individuals planning bird surveys should recognize these biases and select the method that best samples the segment of the community they are surveying and that is least likely to confound treatment effects. Often this may require the use of multiple survey methods.
42 citations
TL;DR: In this article, Mirror traps and mist nets were used with a tape recording of the pumping call of the male bittern to study the American bittern (Botaurus lentiginosus).
Abstract: Capture techniques were developed to study the American Bittern (Botaurus lentiginosus). Mirror traps, mist nets, landing nets, night capture, funnel traps and net gun techniques were evaluated. Mirror traps and mist nets were used with a tape recording of the pumping call of the male bittern. Mist nets were also used to capture females at nest sites. Long-handled fish landing nets were used to capture molting birds and females on nests. Funnel traps were set at feeding sites. Mirror traps had a 50% success rate and were the most efficient means of capturing males. Mist nets were versatile with success rates of 40% on males and 50% on females. Landing net success was 76% on males and 70% on females but restricted to specific situations. Night capture was successful 33% of the time and only on molting birds. Net guns had limited success (6%) due to lack of skill and difficult to get close to birds. Funnel traps were not fully tested.
11 citations
1 Jan 2002
TL;DR: In this article, a sample obtained in the Cave of El Indio, Tapaste (Havana), mist netting, entomological net and the monitoring of echolocation calls were used simultaneously.
Abstract: The conventional methods of sampling used in the study of bat communities (mist netting, entomological nets, pellets shotgun and harp traps) imply the capture and in many occasions the death of the animal, causing stress in the community. The use of acoustic methods is a recent non-invasive alternative that allows the characterization of the structure and composition of the community. In a sample obtained in the Cave of El Indio, Tapaste (Havana), mist netting, entomological net and the monitoring of echolocation calls were used simultaneously. Six species were found: Brachyphylla nana, Phyllonycteris poeyi, Monophyllus redmani, Pteronotus quadridens, P. macleayi and P. parnelli . The bioacoustic method and the entomological net offered more precise information about relative abundance and species diversity than the mist net. However, the results obtained with the entomological net were more influenced by the position of the collect stations and required more physical effort than the biacoustic method. Both conventional and bioacoustic methods show similar results about temporal segregation among species during the first nocturnal exodus: P. quadridens started the exodus before P. poeyi, who started before B. nana . Each method of sampling complements the information given by the others. Investigations of bats communities should combine different methods to attain its most precise and complete characterization.
7 citations