Status and Population Trend in Fox Squirrels on Fringe Range, Colorado

1959 ◽  
Vol 23 (1) ◽  
pp. 102 ◽  
Author(s):  
Lee E. Yeager
Keyword(s):  
Population Trend ◽  
Fox Squirrels

Fox Squirrels' Nests in a Barn

1926 ◽  
Vol 7 (4) ◽  
pp. 332-332
Author(s):  
A. R. Sherman
Keyword(s):  
Fox Squirrels

Effects of lek count protocols on greater sage-grouse population trend estimates

2016 ◽  
Vol 80 (4) ◽  
pp. 667-678 ◽  
Author(s):  
Adrian P. Monroe ◽  
David R. Edmunds ◽  
Cameron L. Aldridge
Keyword(s):  
Population Trend ◽  
Sage Grouse

scholarly journals A statistical assessment of population trends for data deficient Mexican amphibians

2014 ◽  
Author(s):  
Esther Quintero ◽  
Anne E. Thessen ◽  
Paulina Arias-Caballero ◽  
Bárbara Ayala-Orozco
Keyword(s):  
Random Forests ◽  
Demographic Data ◽  
Population Trend ◽  
Population Trends ◽  
Conservation Priorities ◽  
Risk Category ◽  
Conservation Action ◽  
Amphibian Species ◽  
Complex Processes ◽  
Data Deficient

Background: Mexico is the fourth richest country in amphibians and the second country with the highest quantity of threatened amphibian species, and this number could be higher as many species are too poorly known to be accurately assigned to a risk category. The absence of a risk status or an unknown population trend can slow or halt conservation action, so it is vital to develop tools that in the absence of specific demographic data can assess a species’ risk of extinction, population trend, and to better understand which variables increase their vulnerability. Recent studies have demonstrated that the risk of species decline depends on extrinsic and intrinsic trait, thus including both of them for assessing extinction might render more accurate assessment of threat. Methods: In this study harvested data from the Encyclopedia of Life (EOL) and the published literature for Mexican amphibians and used these data to assess the population trend of some of the Mexican species that have been assigned to the Data Deficient category of the IUCN using Random Forests, a Machine Learning method that gives a prediction of complex processes and identifies the most important variables that account for the predictions. Results: Our results show that most data deficient Mexican amphibians have decreasing population trends. We found that Random Forests is a solid and accurate way to identify species with decreasing population trends when no demographic data is available. Moreover, we point the most important variables that make species more vulnerable for extinction. This exercise is a very valuable first step in assigning conservation priorities for poorly known species.

scholarly journals POPULATION TREND OF THE INVASIVE BLUE CRAB CALLINECTES SAPIDUS RATHBUN,1896 IN PATOKU LAGOON.

2021 ◽  
pp. 135-140
Author(s):  
Ermira Milori ◽  
Stela Ruci ◽  
Sajmir Beqiraj
Keyword(s):  
Alien Species ◽  
Blue Crab ◽  
Callinectes Sapidus ◽  
Population Trend ◽  
Crab Population ◽  
Scientific Report ◽  
Marine Alien Species

The blue crab Callinectes sapidus is one of the 23 marine alien species reported for the Albanian coast so far (Beqiraj et al., 2012; Katsanevakis et al., 2011). The first scientific report on the presence of this species in the Albanian coast is in 2009, in Patoku Lagoon. The blue crab population in Patoku Lagoon had grown significantly by 2009 and the blue crab had started to be traded. The data collected in that year showed that this species is assessed to be established in the Patoku Lagoon (Beqiraj & Kashta, 2010). Special attention has been paid to the study of blue crab population in the following years during 2010 - 2015. The aim of this study is to evaluate the development and population trend of blue crab in the Patoku Lagoon referring to the data collected throughout years of study.

scholarly journals Bee diversity in Spain. Population trend and conservation measures (Hymenoptera, Apoidea, Anthophila)

Ecosistemas ◽  
2018 ◽  
Vol 27 (2) ◽  
pp. 3-8 ◽  
Author(s):  
Fco. Javier Ortiz Sánchez ◽  
Luis Óscar Aguado Martín ◽  
Concepción Ornosa Gallego
Keyword(s):  
Population Trend ◽  
Conservation Measures ◽  
Bee Diversity

scholarly journals Invasion, Damage, and Control Options for Eastern Fox Squirrels

2010 ◽  
Vol 24 ◽  
Author(s):  
Sara , K. Krause ◽  
Douglas , A. Kelt ◽  
Dirk , H. Van Vuren
Keyword(s):  
Control Options ◽  
Fox Squirrels ◽  
And Control
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