Results 21 to 30 of about 7,491 (94)

An evaluation of population indices for northern bobwhite

Wildlife Society Bulletin, 2019
Northern bobwhite (Colinus virginianus) populations are monitored using 2 general approaches—population indices and abundance estimators. Due to their convenient sampling designs, indices are commonly used by land managers and researchers to predict or ...
Bradley W. Kubečka, John T. Edwards, Lloyd M. LaCoste, Dale Rollins, Fidel Hernández, Humberto L. Perotto‐Baldivieso   +5 more
doaj   +1 more source

Estimating the population structure of Javan rhinos (Rhinoceros sondaicus) in Ujung Kulon National Park using the mark- recapture method based on video and camera trap identification

Pachyderm, 2011
The population structure of the Javan rhino (Rhinoceros sondaicus) in Ujung Kulon National Park (NP) in Banten, Indonesia was assessed using visual identification and mark-recapture estimation.
Adhi Hariyadi, Agus Priambudi, Ridwan Setiawan, Daryan Daryan, Asep Yayus, Hendra Purnama   +5 more
doaj   +1 more source

Home‐site fidelity and homing behavior of the big‐headed turtle Platysternon megacephalum

Ecology and Evolution, 2021
Site fidelity refers to the restriction of dispersal distance of an animal and its tendency to return to a stationary site. To our knowledge, the homing ability of freshwater turtles and their fidelity is reportedly very low in Asia.
Fanrong Xiao, Rongping Bu, Liu Lin, Jichao Wang, Haitao Shi   +4 more
doaj   +1 more source

Evaluation of population densities of the common wolf spider Pardosa agrestis (Araneae: Lycosidae) in Hungarian alfalfa fields using mark-recapture

European Journal of Entomology, 2000
The absolute population density of adult Pardosa agrestis (Westring, 1862), the dominant epigeic spider species in many arable lands in Central Europe, was quantified in two alfalfa fields using a multiple mark-recapture method.
Balázs KISS, Ferenc SAMU
doaj   +1 more source

A comparison of 3 common methods for monitoring gopher tortoises

Wildlife Society Bulletin
Wildlife biologists choose monitoring techniques for threatened and endangered species that optimize time, resources, data quantity, and data quality.
Jeffrey M. Goessling, George L. Heinrich, Jennifer M. Howze   +2 more
doaj   +1 more source

Flexible and non-invasive passive integrated transponder (PIT) tagging protocols for tropical freshwater fish species

MethodsX, 2018
Passive integrated transponder (PIT) tagging has proven to be an effective mark-recapture technique for many temperate freshwater and marine fish species, but its adaptability to tropical freshwater species remains largely unknown.
Bettina Grieve, J. Baumgartner Lee, Wayne Robinson, Luiz G.M. Silva, Karl Pomorin, Garry Thorncraft, Nathan Ning   +6 more
doaj   +1 more source

Long-term trends in the use of a protected area by small cetaceans in relation to changes in population status

Global Ecology and Conservation, 2014
The requirement to monitor listed species in European designated sites is challenging for long-lived mobile species that only temporarily occupy protected areas.
Barbara Cheney, Ross Corkrey, John W. Durban, Kate Grellier, Philip S. Hammond, Valentina Islas-Villanueva, Vincent M. Janik, Susan M. Lusseau, Kim M. Parsons, Nicola J. Quick, Ben Wilson, Paul M. Thompson   +11 more
doaj   +1 more source

An approach to predicting linear trends in tagging-related mortality and tag loss during mark-recapture studies

Frontiers in Ecology and Evolution
Using tags within a mark-recapture framework allows researchers to assess population size and connectivity. Such methods have been applied in coastal zone habitats to monitor salt marsh restoration success by comparing the movement patterns of Mummichogs
Jasper McCutcheon, Brendan Campbell, Rileigh E. Hudock, Noah Motz, Madison Windsor, Aaron Carlisle, Edward Hale, Edward Hale   +7 more
doaj   +1 more source

The estimation of grizzly bear density through hair‐snagging techniques above the tree line

Wildlife Society Bulletin, 2015
Assessing grizzly bears' (Ursus arctos) abundance in the Arctic has been challenging because of the large scale of their movements and the remoteness of field locations.
Mathieu Dumond, John Boulanger, David Paetkau   +2 more
doaj   +1 more source

Challenges and opportunities for monitoring wild Nile crocodiles with scute mark-recapture photography

Koedoe: African Protected Area Conservation and Science, 2018
The global conservation status of Nile crocodiles (Crocodylus niloticus) was last assessed in 1996. The species presents particular difficulty in monitoring because it can be cryptic, require expertise to handle, and caudal tail tags and transmitters are
Bernard W.T. Coetzee, Sam M. Ferreira, Kristine Maciejewski   +2 more
doaj   +1 more source