scholarly journals Nightjars, rabbits, and foxes interact on unpaved roads: spatial use of a secondary prey in a shared-predator system

Ecosphere ◽  
2017 ◽  
Vol 8 (1) ◽  
pp. e01611 ◽  
Author(s):  
Carlos Camacho ◽  
Pedro Sáez-Gómez ◽  
Jaime Potti ◽  
José María Fedriani
Keyword(s):  
Unpaved Roads ◽  
Spatial Use ◽  
Shared Predator ◽  
Predator System

scholarly journals A night-lighting technique for capturing peruvian thick-knees (Burhinus superciliaris) and first data on molt sequence and biometrics

2015 ◽  
Vol 31 (1) ◽  
Author(s):  
Carlos Camacho ◽  
Santiago Torres
Keyword(s):  
Life History ◽  
Weight Gain ◽  
Conservation Status ◽  
Capture Rate ◽  
Life History Strategies ◽  
Unpaved Roads ◽  
Life History Parameters ◽  
Capture Success ◽  
Spatial Use ◽  
First Time

The Peruvian thick-knee Burhinus superciliaris (Tschudi, 1843) is an uncommon species with highly cryptic behavior, and is thus difficult to capture and monitor. As a result, many questions remain about their basic life-history strategies and conservation status. During January and February 2009, a night-lighting technique was developed for the selective capture of Peruvian Thick-knees in southwestern Ecuador, and the molt sequence and biometrics of freeranging individuals were documented for the first time. Birds were located (24 sightings) and captured (four individuals) along 48 km of unpaved roads using a lightweight LED flashlight and a 80-cm diameter hand-held net. On average, capture success was 0.29 birds captured/session (range, 0−2) out of 0.64 attempts per session (range, 0–4) and a capture rate of 0.44 birds/attempt (n = 9 attempts). The molt progress was sequential and highly symmetrical and no simultaneous growing of feathers from the same feather tract was observed, except in secondaries. In contrast to the rectrices, primary feathers were shed from the innermost to the outermost, whereas birds seemed to have two molting centers for secondaries. The high recapture opportunities of this method allows monitoring the molt sequence, weight gain, spatial use and other life-history parameters of the Peruvian Thick-knee and possibly other small and medium-sized birds.

THE ANALYSIS OF HOPF BIFURCATION FOR THE PREY-PREDATOR SYSTEM WITH DIFFUSION AND DELAY

1991 ◽  
Vol 11 (2) ◽  
pp. 142-163 ◽  
Author(s):  
Li Zhou ◽  
Kaitai Song
Keyword(s):  
Hopf Bifurcation ◽  
Predator System

Stability in a Discrete Fractional Order Prey Predator System with Functional Response

2017 ◽  
Vol 7 (5) ◽  
pp. 630-633 ◽  
Author(s):  
A. George Maria Selvam ◽  
◽  
R. Janagaraj ◽  
Britto Jacob. S ◽  
◽  
...  
Keyword(s):  
Functional Response ◽  
Fractional Order ◽  
Predator System

Dynamics of Holling-type II prey–predator system with a protection zone for prey

2020 ◽  
pp. 1-15
Author(s):  
Aung Zaw Myint ◽  
Mingxin Wang
Keyword(s):  
Type Ii ◽  
Protection Zone ◽  
Predator System

Protected areas and unpaved roads mediate habitat use of the giant anteater in anthropogenic landscapes

2021 ◽  
Author(s):  
Natalia F Versiani ◽  
Larissa L Bailey ◽  
Nielson Pasqualotto ◽  
Thiago F Rodrigues ◽  
Roberta M Paolino ◽  
...  
Keyword(s):  
Habitat Use ◽  
Protected Areas ◽  
Native Species ◽  
Population Decline ◽  
Native Vegetation ◽  
Brazilian Cerrado ◽  
Anthropogenic Landscapes ◽  
Unpaved Roads ◽  
Relative Paucity ◽  
Model Average

Abstract The drastic reduction of the Brazilian Cerrado has transformed this savanna hotspot into vast swaths of commodity-based agriculture fields, mainly soybean, sugarcane, and beef-production pasturelands. The resulting habitat loss and fragmentation are the principal factors underlying population decline of native species inhabiting the Cerrado, particularly those with a high demand for space, low population density, and specialized diet, such as the endangered giant anteater (Myrmecophaga tridactyla). Although the species has been studied in protected areas, we know much less about its ability to endure in disturbed landscapes. Here, we analyzed camera-trapping data to estimate a proxy of habitat use (ψ^; occupancy) and detection probabilities of the giant anteater, identifying environmental covariates influencing these parameters in landscapes with intensive agriculture and commercial forestry. We found this species using about half of the study area (model average ψ^ = 0.51, CI = 0.40–0.62), with two predictors strongly influencing habitat use: protected areas and unpaved roads. In turn, detection probability correlates positively with area of open Cerrado and negatively with area of settlements. The species is more likely to use unpaved roads inside protected areas (ψ^ = 0.90, CI = 0.47–0.75), compared to off road sites in the surrounding areas (ψ^ = 0.19, CI = 0.10–0.34). Our findings indicate that giant anteaters are dependent on nature reserves and native vegetation areas existing on private properties, whose protection is regulated by the Brazilian Native Vegetation Protection Law. Given the relative paucity of state-owned protected areas in the Brazilian Cerrado, increasing the adherence of rural owners to this law is, therefore, key for the conservation of the giant anteater. The intense use of unpaved roads might reflect travelling and/or foraging optimization, a behavioral response that, nevertheless, may compound this species’ susceptibility to suffer mortality from roadkill.

scholarly journals Order and Chaos in a Prey-Predator Model Incorporating Refuge, Disease, and Harvesting

2020 ◽  
Vol 2020 ◽  
pp. 1-19
Author(s):  
Dahlia Khaled Bahlool ◽  
Huda Abdul Satar ◽  
Hiba Abdullah Ibrahim
Keyword(s):  
Equilibrium Points ◽  
Global Dynamics ◽  
Persistence Conditions ◽  
Local Bifurcation Analysis ◽  
Uniqueness Of The Solution ◽  
Harvesting Process ◽  
Predator Model ◽  
The Stability ◽  
Predator System ◽  
Type Ii Functional Response

In this paper, a mathematical model consisting of a prey-predator system incorporating infectious disease in the prey has been proposed and analyzed. It is assumed that the predator preys upon the nonrefugees prey only according to the modified Holling type-II functional response. There is a harvesting process from the predator. The existence and uniqueness of the solution in addition to their bounded are discussed. The stability analysis of the model around all possible equilibrium points is investigated. The persistence conditions of the system are established. Local bifurcation analysis in view of the Sotomayor theorem is carried out. Numerical simulation has been applied to investigate the global dynamics and specify the effect of varying the parameters. It is observed that the system has a chaotic dynamics.

Estimation of initiation thresholds and soil loss from gully erosion on unpaved roads on China’s Loess Plateau

2021 ◽  
Author(s):  
Yiyang Zhao ◽  
Yan Zhang ◽  
Mutian Yuan ◽  
Meng Yang ◽  
Jiayong Deng
Keyword(s):  
Loess Plateau ◽  
Soil Loss ◽  
Gully Erosion ◽  
Unpaved Roads

Modeling and analysis of a fractional-order prey-predator system incorporating harvesting

2020 ◽  
Author(s):  
Manotosh Mandal ◽  
Soovoojeet Jana ◽  
Swapan Kumar Nandi ◽  
T. K. Kar
Keyword(s):  
Fractional Order ◽  
Modeling And Analysis ◽  
Predator System

Mechanistic-based comparisons for freeze-thaw performance of stabilized unpaved roads

2017 ◽  
Vol 141 ◽  
pp. 97-108 ◽  
Author(s):  
Cheng Li ◽  
Pavana K.R. Vennapusa ◽  
Jeramy Ashlock ◽  
David J. White
Keyword(s):  
Unpaved Roads ◽  
Freeze Thaw

Switching effect on the stability of the prey-predator system with three trophic levels

1986 ◽  
Vol 122 (3) ◽  
pp. 251-262 ◽  
Author(s):  
Hiroyuki Matsuda ◽  
Kohkichi Kawasaki ◽  
Nanako Shigesada ◽  
Ei Teramoto ◽  
Luigi M. Ricciardi
Keyword(s):  
Trophic Levels ◽  
Switching Effect ◽  
The Stability ◽  
Predator System
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