Microhabitat Utilization, Feeding Periodicity, Home Range and Population Size of the Banded Sculpin, Cottus carolinae

Copeia ◽  
1987 ◽  
Vol 1987 (1) ◽  
pp. 19 ◽  
Author(s):  
Larry A. Greenberg ◽  
David A. Holtzman
Keyword(s):  
Home Range ◽  
Population Size ◽  
Cottus Carolinae ◽  
Feeding Periodicity

Population Size and Summer Home Range of the Green Crab, Carcinus maenas, in Salt Marsh Tidal Creeks

1999 ◽  
Vol 197 (2) ◽  
pp. 297-299 ◽  
Author(s):  
T. Young ◽  
S. Komarow ◽  
L. Deegan ◽  
R. Garritt
Keyword(s):  
Salt Marsh ◽  
Home Range ◽  
Population Size ◽  
Carcinus Maenas ◽  
Green Crab ◽  
Tidal Creeks

Habitat Characteristics, Population Size, and Home Range of the Bog Turtle, Clemmys muhlenbergii, in Maryland

1989 ◽  
Vol 23 (4) ◽  
pp. 356 ◽  
Author(s):  
Janis Davis Chase ◽  
Kenneth R. Dixon ◽  
J. Edward Gates ◽  
Dan Jacobs ◽  
Gary J. Taylor
Keyword(s):  
Home Range ◽  
Population Size ◽  
Habitat Characteristics ◽  
Bog Turtle ◽  
Clemmys Muhlenbergii

Population Size and Home Range of American Eels in a Georgia Tidal Creek

1985 ◽  
Vol 114 (6) ◽  
pp. 821-825 ◽  
Author(s):  
Earl L. Bozeman ◽  
Gene S. Helfman ◽  
Thelma Richardson
Keyword(s):  
Home Range ◽  
Population Size ◽  
Tidal Creek ◽  
American Eels

scholarly journals Population size, dynamics and reproduction success of the lesser spotted eagle (Aquila pomarina) in Latvia

2015 ◽  
Vol 9 (1) ◽  
pp. 45-54 ◽  
Author(s):  
Uģis Bergmanis ◽  
Ainārs Auniņš ◽  
Aivars Petriņš ◽  
Valdis Cīrulis ◽  
Jānis Granāts ◽  
...  
Keyword(s):  
Reproductive Success ◽  
Home Range ◽  
Population Size ◽  
Breeding Population ◽  
Short Term ◽  
Average Value ◽  
Reproduction Success ◽  
Size Population ◽  
Breeding Attempt ◽  
The Individual

Abstract We analysed the population size, population dynamics and reproduction success of the lesser spotted eagle in Latvia from 1988 to 2014. While the overall population did not show a statistically significant trend during any of the periods analysed (long, medium and short term), the populations in the individual study areas changed differently: of five research plots, populations were stable in two, increased in one, and decreased in two research plots. Using the existing research plots as samples of breeding numbers in areas of different breeding density classes based on forest management units, the total breeding population in Latvia was estimated. The overall number of breeding pairs in 2012-2014 was between 3700-4000. During the period 1988-2014, 65.62% of all pairs recorded as present on their home range, made a breeding attempt and laid eggs. The reproductive success ratio was 0.49 young per occupied territory with an adult pair of birds and 0.74 young per breeding pair which laid eggs. Overall, during the 21 -year research period there was a stable long-term trend in reproductive success (young per pair present on home range). Rarely, indeed only in 1 .89% of all cases did two young fledge. The total number of young (young per 100 km2) shows stable long-, medium- and short-term trends with an average value of 5.1 young per 100 km2.

Habitat selection, home range and population size of Baillon’s Crake Zapornia pusilla in the Senegal Delta, north-west Senegal

2017 ◽  
Vol 28 (1) ◽  
pp. 38-58
Author(s):  
NINA SEIFERT ◽  
COSIMA TEGETMEYER ◽  
ANGELA SCHMITZ ORNÉS
Keyword(s):  
Habitat Selection ◽  
Home Range ◽  
Population Size ◽  
River Delta ◽  
North West ◽  
Senegal River ◽  
Ecological Requirements ◽  
High Resolution Satellite Images ◽  
Population Size Estimates ◽  
The Individual

SummaryKnowledge of a species’ ecological requirements is a prerequisite for effective conservation, particularly if the species is assumed to be declining due to modification of its primary habitats. Information about habitat suitability allows both the inference of specific habitat management measures as well as population size estimates which can facilitate the setting up of conservation priorities. As one of the least known Palaearctic breeding birds, the current knowledge of Baillon’s Crake Zapornia pusilla comprises only very general information about the species’ ecological requirements, habitat selection, extent and dynamics of home ranges or population densities within its Palaearctic-Afrotropical range. We used a multi-scale approach to assess the species’ habitat requirements in the Senegal River Delta, north-west Senegal. At the individual level, we calculated Manly selection indices for 17 radio-tracked Baillon’s Crakes, allowing for different levels of resource availability. Considering the entire Djoudj area including the Parc National des Oiseaux du Djoudj (PNOD), we modelled presence probability as well as population density of Baillon’s Crakes based on high-resolution satellite images and capture data from field surveys in 2009–2013. Using 95% kernels, home range size was on average 1.77 ± 0.86 ha with significant differences between habitats. Both at the individual as well as population level, Baillon’s Crakes preferred edge structures, selecting for trampling paths and edges along open water bodies as well as boundaries of specific vegetation stands while species composition was of less importance. Based on the regression models, we identified 9,516 ha of suitable habitat within the Djoudj area and a potential population size of 10,714 individuals (range 3,146–17,408). Although global population estimates are highly tentative, we assume the Senegal River Delta and the PNOD of outstanding significance for African and possibly also European populations of Baillon’s Crake.

scholarly journals Estimating population size of fishers (Pekania pennanti ) using camera stations and auxiliary data on home range size

Ecosphere ◽  
2017 ◽  
Vol 8 (3) ◽  
pp. e01747 ◽  
Author(s):  
B. J. Furnas ◽  
R. H. Landers ◽  
R. L. Callas ◽  
S. M. Matthews
Keyword(s):  
Home Range ◽  
Population Size ◽  
Home Range Size ◽  
Range Size ◽  
Auxiliary Data ◽  
Pekania Pennanti

Abdim's Stork Ciconia abdimii in Niger: population size, breeding ecology and home range

Ostrich ◽  
2008 ◽  
Vol 79 (2) ◽  
pp. 177-185 ◽  
Author(s):  
Kim Diget Christensen ◽  
Knud Falk ◽  
Flemming Pagh Jensen ◽  
Bo Svenning Petersen
Keyword(s):  
Home Range ◽  
Population Size ◽  
Breeding Ecology
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