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12 results for “mist-nets”
CBC02 Winter-spring survival and response of birds to variable climate using mist-net captures at Konza Prairie
This dataset includes captures of small-bodied landbirds captured via passive mist-netting efforts. The objectives are to (a) initiate a long-term survey of the non-breeding birds of the site, (b) understand the behavioral and physiological mechanisms that allow birds to cope with the unpredictable, variable, and often harsh conditions during winter months, and (c) provide a training platform for students. The collection of this dataset is fully integrated into the teaching of “Wild Bird Research” (an undergraduate hands-on research course in the Division of Biology) and less formal instruction in bird research methods for graduate students. Additionally, the banding efforts have benefited from the engagement of Konza Prairie docents and frequently hosts class visits and other visitors interested in witness bird banding operations.
Ovenbird Mist-netting Dataset
<p>Data from a multi-year mist-netting study of ovenbirds (<em>Seiurus aurocapilla</em>) at a site in Maryland, USA.</p> <p>The text files 'ovenCHpcapt.txt' and 'ovenCHptrap.txt' contain the ovenbird mist net data of Dawson & Efford (2009) re-analysed by Efford & Schofield (2022). The data are also included in the R package 'secr' (Efford 2022) where a more complete description may be found.</p> <p>The format follows that used by 'secr', described in <a href="https://www.otago.ac.nz/density/pdfs/secr-datainput.pdf">secr-datainput.pdf</a>.</p> <p># Use this R code to re-construct the 'secr' capthist object</p> <p>library(secr)<br> ovenCHp <- read.capthist('ovenCHpcapt.txt', 'ovenCHptrap.txt',<br> detector = 'proximity')</p> <p># ... and summarise with<br> summary(ovenCHp, terse = TRUE)</p> <p> 2005 2006 2007 2008 2009<br> Occasions 9 10 10 10 10<br> Detections 41 49 57 33 35<br> Animals 20 22 26 19 16<br> Detectors 44 44 44 44 44</p> <p>'Occasions' correspond to days. Detections were binary at the level of bird x net x day. Birds could be recorded in more than one net per day.</p> <p>References</p> <p>Dawson, D. K. & Efford, M. G. (2009) Bird population density estimated from<br> acoustic signals. Journal of Applied Ecology 46: 1201-1209.</p> <p>Efford, M. G. (2022). secr: Spatially explicit capture-recapture models.<br> R package version 4.5.5. https://CRAN.R-project.org/package=secr.<br> <br> Efford, M. G. & Schofield, M. (2022) A review of movement models in open<br> population capture–recapture. Methods in Ecology and Evolution In press. </p>
Fig. 4 in Daytime Activity Of Reed Passerine Birds Based On Mist-Netting
Fig. 4. Daily activity of juvenile (black columns) and adult (dotted columns) reedbed passerines in National Nature Reserve Parížske močiare marsh in the late breeding periods of 1999–2004
Fig. 2 in Daytime Activity Of Reed Passerine Birds Based On Mist-Netting
Fig. 2. The morning (left) and evening (right) mean capture times (±SE) of reedbed passerines in National Nature Reserve Parížske močiare marsh in the late breeding periods of 1999–2004. (Llus: Locustella luscinioides (n = 293), Amel: Acrocephalus melanopogon (n = 78), Asch: A. schoenobaenus (n = 445), Apal: A. palustris (n = 112), Asci: A. scirpaceus (n = 1270), Aaru: A. arundinaceus (n =
Fig. 1 in Daytime Activity Of Reed Passerine Birds Based On Mist-Netting
Fig. 1. Capture rates of reedbed passerines mist netted in National Nature Reserve Parížske močiare marsh in the late breeding periods of 1999–2004
Fig. 3 in Daytime Activity Of Reed Passerine Birds Based On Mist-Netting
Fig. 3. Morning (white), daily (dotted) and evening (black) activity of reedbed passerines in National Nature Reserve Parížske močiare marsh in the late breeding periods of 1999–2004. (Llus: Locustella luscinioides, Amel: Acrocephalus melanopogon, Asch: A. schoenobaenus, Apal: A. palustris, Asci: A.
Figure 1 in Rise-Up mist-netting (RUM): a mobile protocol for trapping wary territorial birds
Figure 1. Schematics of the rise-up mist-netting (RUM) trapping protocol showing the 6 m long mist net setup between a wireless speaker and the target- ed bird while being operated by the researcher and a single assistant. The pole extremity closer to the bird must be quickly and simultaneously raised upright by both operators only after the bird reaches the point-of-no-return (i.e., the point which the bird is unable to avoid colliding to the trap), which was estimat- ed through trial-and-error to be ~ 3 m for the Rufous Hornero (Furnarius rufus).
Increasing efficiency and reducing bias in the detection of seed-dispersal interactions based on mist-netted birds
<p>Efficient and unbiased sampling of ecological interactions is essential to our understanding of the functions they mediate. Seed dispersal by frugivorous birds is a key mutualism for plant regeneration and community dynamics. Mist-netting is one of the most widely used methods to sample avian seed dispersal through the identification of seeds in droppings of captured birds kept inside cloth bags. However, birds may drop seeds on the ground before being extracted from the net, leading to a fraction of missing information due to ineffective sampling. Worryingly, this fraction could be unevenly distributed across bird and plant species, leading to sampling biases. Here, we assess the effectiveness of using a 1- m wide mesh below mist nets to sample seeds dropped by entangled birds. We used data from birds mist-netted during one-year-round. We sampled nearly 50% of interaction events and 75% of dispersed seeds on the mesh band below the mist nets (i.e. lost information without this optimization). The proportion of seeds sampled on the mesh bands was not evenly distributed among bird species but strongly related to bird size, ranging from 57-63% in warblers to 84-94% in thrushes. Moreover, the proportion of seeds sampled on the mesh was negatively related to seed size, although this relationship was weaker. We also evaluated accumulation curves of species and pairwise interactions with increasing sampling effort, both with and without using the mesh bands. The number of seed species sampled increased by 21% when using the mesh bands and the number of pairwise interactions by 36%. Our findings provide strong evidence on how inefficient and biased traditional mist-netting can be for sampling community-wide seed-dispersal interactions. We thus urge the use of mesh bands in future studies to increase sampling effectiveness and avoid biases, which will ultimately improve our understanding of the seed dispersal function.</p>
Increasing efficiency and reducing bias in the detection of seed-dispersal interactions based on mist-netted birds
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The elevated mist-net frame - Supporting Information: Appendices S1-S4
<p><b>Summary<b> </b></b></p> <ol> <li><span><span><span>Classic standard mist-netting limits sampling to understory birds flying <3 m above ground-level. Methodological innovations targeting higher strata birds (and bats) are important for ecological studies, particularly in tropical forests.</span></span></span></li> <li><span><span><span>I present and evaluate a method of applying elevated mist-net frames (EMF) up to ~25-30 m. I designed detachable mobile alloy frames for standard-sized 3×6 m mist-nets, weighing ~11 kg including fittings, and suspended by 3-point cable-wire mounting. State-of-the-art archery and fishing gear are employed for securing anchor-lines, with hoisting applied by pulley, ropes and guys. </span></span></span></li> <li><span><span><span>EMF is assembled and detached by 2-3 team members within 15-20 minutes, and up-down hoisting lasts 1-3 minutes. EMF excludes tree-climbing and arboreal platforms, through versatile manoeuvring in lightly-cluttered naturally open corridors. EMF costs are source and quantity dependent, and feasible to institutions and grant beneficiaries. </span></span></span></li> <li><span><span><span>EMF is a workable alternative or supplement to existing elevated mist-netting applying poles, ropes and pulleys, owing to strength and durability, replicable construction, and versatile manoeuvrability in upper strata. The EMF-design demonstrates favourable prospects for high-tech development, thus further innovations are recommended. </span></span></span></li> </ol>
The elevated mist-net frame - Supporting Information: Appendices S1-S4
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Data from: Estimating mortality rates among passerines caught for ringing with mist-nets using data from previously-ringed birds
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