Results 31 to 40 of about 117,053 (296)

Use of aerial distance sampling to estimate abundance of tule elk across a gradient of canopy cover and comparison to a concurrent fecal DNA spatial capture-recapture survey

California Fish and Wildlife Journal, 2022
Historically, aerial surveys have been used widely to monitor abundance of large mammals in the western United States. In California, such surveys have typically served as minimum count indices rather than true abundance estimates. Here, we evaluated the
Thomas J. Batter, Russ H. Landers, Kristin Denryter, Joshua P. Bush   +3 more
doaj   +1 more source

Analysis Condition of Coral Reef Covering in Pramuka Island Waters, Seribu Islands using Line Intercept Transect (LIT) Method

Jurnal Riset Biologi dan Aplikasinya, 2020
The coral reef ecosystem is one of the typical tropical ecosystems with high biodiversity which has an important role both biologically, ecologically, physically as well as socially and economically. Several coral reef areas in Indonesia were reported to
Rega Permana, Nora Akbarsyah, Pringgo KDNY Putra, Aulia Andhikawati   +3 more
doaj   +1 more source

The land–sea coastal border: a quantitative definition by considering the wind and wave conditions in a wave-dominated, micro-tidal environment [PDF]

, 2019
A quantitative definition for the land–sea (coastal) transitional area is proposed here for wave-driven areas, based on the variability and isotropy of met-ocean processes.
García León, Manuel, Gracia Garcia, Vicente, Lin Ye, Jue, Pallarès López, Elena, Sánchez-Arcilla Conejo, Agustín   +4 more
core   +2 more sources

Determination of Mortality Rates in Pinna nobilis (Linnaeus, 1758) Population in The Çanakkale Strait

Çanakkale Onsekiz Mart University Journal of Marine Sciences and Fisheries, 2021
The population of ecologically important Pinna nobilis (Linneaus, 1758), the largest bivalve species of the Mediterranean, has been under serious threat since 2016 as a result of both anthropogenic effects and the epidemic caused by Haplosporidium pinnae.
Ata AKSU
doaj   +1 more source

A century of tree line changes in sub-Arctic Sweden shows local and regional variability and only a minor influence of 20th century climate warming [PDF]

, 2011
Aim Models project that climate warming will cause the tree line to move to higher elevations in alpine areas and more northerly latitudes in Arctic environments.
Callaghan, Terry V, De Dapper, Morgan, Haneca, Kristof, Hoogesteger, Jan, Jonasson, Christer, Van Bogaert, Rik   +5 more
core   +1 more source

Improving aquatic warbler population assessments by accounting for imperfect detection.

PLoS ONE, 2014
Monitoring programs designed to assess changes in population size over time need to account for imperfect detection and provide estimates of precision around annual abundance estimates.
Steffen Oppel, Piotr Marczakiewicz, Lars Lachmann, Grzegorz Grzywaczewski   +3 more
doaj   +1 more source

Age structure, dispersion and diet of a population of stoats (Mustela erminea) in southern Fiordland during the decline phase of the beechmast cycle [PDF]

, 2004
The dispersion, age structure and diet of stoats (Mustela erminea) in beech forest in the Borland and Grebe Valleys, Fiordland National Park, were examined during December and January 2000/01, 20 months after a heavy seed-fall in 1999.
Brown J. A., Child J., Delattre P., Dilks P. J., Erlinge S., Grue H. E., King C. M., King C. M., King C. M., King C. M., King C. M., Lawrence B., Lockie J. D., McGuinness C. A., Murphy E. C., Murphy E. C., Powell R. A., Ratz H., Rickard C. G., Riddell D., Riney T., Segal A. N., Sharell R., Walker A., Wardle J.   +24 more
core   +2 more sources

Comparing infrared imagery to traditional methods for estimating ringed seal density

Wildlife Society Bulletin, 2019
When conducting aerial surveys of wildlife populations, a number of animals go undetected by observers. The use of infrared imagery may offer a solution to improve detection rates and reduce visibility bias.
Brent G. Young, David J. Yurkowski, J. Blair Dunn, Steven H. Ferguson   +3 more
doaj   +1 more source

Basin-wide estimates of loggerhead turtle abundance in the Mediterranean Sea derived from line transect surveys

Frontiers in Marine Science, 2022
Loggerhead turtles are a globally vulnerable species of marine turtle. Broad-scale patterns of distribution and abundance can provide regional managers a tool to effectively conserve and manage this species at basin and sub-basin scales.
Andrew DiMatteo, Ana Cañadas, Jason Roberts, Laura Sparks, Simone Panigada, Olivier Boisseau, Anna Moscrop, Caterina Maria Fortuna, Giancarlo Lauriano, Draško Holcer, Draško Holcer, Hélène Peltier, Vincent Ridoux, Juan Antonia Raga, Jesús Tomás, Annette C. Broderick, Brendan J. Godley, Julia Haywood, David March, David March, Robin Snape, Robin Snape, Ricardo Sagarminaga, Sandra Hochscheid   +23 more
doaj   +1 more source

Estimating Percent Residue Cover Using the Line-Transect Method [PDF]

, 2009
Leaving crop residue on the soil surface is one of the easiest and most cost-effective methods of reducing soil erosion. Research in Nebraska and other midwestern states has shown that leaving as little as 20 percent of the soil surface covered with crop
Jasa, Paul J., Shelton, David P.
core   +1 more source