Results 81 to 90 of about 2,293 (139)

Nautilus at Risk – Estimating Population Size and Demography of Nautilus pompilius [PDF]

, 2011
The low fecundity, late maturity, long gestation and long life span of Nautilus suggest that this species is vulnerable to over-exploitation. Demand from the ornamental shell trade has contributed to their rapid decline in localized populations.
A Dunstan, A Dunstan, A Dunstan, AGC Del Norte-Campos, Andrew Dunstan, ARHSW Swan, B Sinclair, B Westermann, BA Carlson, CJ Schwarz, Corey J. A. Bradshaw, D Collins, DL Watson, GC White, HA Malcolm, JM Arnold, JM Strugnell, Justin Marshall, K Tanabe, K Uchiyama, KP Burnham, LP Zann, Martin Solan, N Haven, NH Landman, NH Landman, P De Angelis, P Ward, P Ward, P Ward, P Ward, PD Ward, PD Ward, PD Ward, RAWG Hewitt, RJ Beaman, RK Odor, RT Hanlon, S Okubo, WB Saunders, WB Saunders, WB Saunders, WB Saunders, WB Saunders, WB Saunders, WB Saunders, Y Kanie, Y Kanie   +47 more
core   +3 more sources

Application of photographic ‘capture–recapture' modelling to estimate recruitment and apparent survival in a long‐lived territorial raptor

Journal of Avian Biology, Volume 2025, Issue 6, November 2025.
Survival is a life history trait that contributes most to population dynamics in long‐lived birds, and the study of individual characteristics is relevant for population conservation. Here we provide information on territorial recruitment and individual replacement in a population of Bonelli's eagle Aquila fasciata in southeastern Spain based on a long‐
José Enrique Martínez, Mario Álvarez, José Francisco Calvo, María Victoria Jiménez‐Franco   +3 more
wiley   +1 more source

Status and population dynamics of the Critically Endangered Valcheta frog Pleurodema somuncurense on the Patagonian Somuncura Plateau

Endangered Species Research, 2019
Amphibian populations are declining globally. In this scenario, detailed information on their ecology is crucial to determine the status and extinction risk of their populations and, therefore, better plan conservation activities.
MA Velasco, I Berkunsky, MS Akmentins, CA Kass, ML Arellano, TM Aguirre, JD Williams, FP Kacoliris   +7 more
doaj   +1 more source

Demographic modeling of conservation strategies for the Yosemite toad (Anaxyrus canorus) [PDF]

, 2022
The Yosemite toad (Anaxyrus canorus) is an anuran species endemic to the Sierra Nevada in California that, like many amphibians globally, has suffered population declines. The documented decline in A.
Kamoroff, Corrina Rebecca
core   +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

Integrated population models: a novel analysis framework for deeper insights into population dynamics [PDF]

, 2018
Integrated population models (IPMs) represent the single, unified analysis of population count data and demographic data. This modelling framework is quite novel and can be implemented within the classical or the Bayesian mode of statistical inference ...
Abadi, Fitsum, Schaub, Michael
core  

Fuzzy logic modelling of snow leopard populations in response to threats from climate change [PDF]

, 2015
The snow leopard population in Kazakhstan represents a small but important component of the species range, making up around 2.7% of the global range, of which 18,673 km2 lies within protected areas. The most recent population estimate, by Jackson et al. (
Baibagysov, Azim, Baiturbayev, Kyat, Convery, Ian, Deecke, Volker B., Harpley, D., Holt, Claire, Janyspayev, A.D., Nevin, Owen, Nurtazin, Sabir, Smith, Darrell, van der Velden, Naomi   +10 more
core  

The Effect of Age on Survival Is Similar in Males and Females of an Aquatic Insect Species

Ecologies
Age is a critical intrinsic factor that influences the probability of survival of organisms on Earth. In many animals, the lifestyles and habitat occupancy of males and females are so different that the effect of age could be sex-dependent.
Abdeldjalil Youcefi, Hayat Mahdjoub, Rabah Zebsa, Amin Kahalerras, Hichem Amari, Abdelheq Zouaimia, Soufyane Bensouilah, Rassim Khelifa   +7 more
doaj   +1 more source

Population dynamics of "Maja squinado" in the Ría de A Coruña (Galicia, NW Spain), using mark-recapture experiments [PDF]

, 2002
8th Colloquium Crustacea Decapoda Mediterranea, 2-6 September 2002, Corfu ...
Bernárdez Martí, Cristina, Corgos López-Prado, Antonio, Freire, Juan, Verísimo Amor, Patricia   +3 more
core  

Dinámica poblacional y fidelidad de refugio por Carollia brevicauda (Quiroptera: Phyllostomidae) en un refugio artificial, en los Andes nororientales de Colombia

Mammalogy Notes, 2022
Los refugios imponen presiones selectivas a los murciélagos. Los refugios proporcionan sitios de apareamiento, hibernación y crianza; promueven interacciones sociales, digestión de alimentos; y ofrecen protección contra el clima adverso y los ...
Diego R. Gutierrez-Sanabria, Diego J. Lizcano   +1 more
doaj