Radio-tracking of Peromyscus leucopus

1977 ◽  
Vol 55 (2) ◽  
pp. 465-468 ◽  
Author(s):  
Pierre Mineau ◽  
Dale Madison
Keyword(s):  
Peromyscus Leucopus ◽  
Mature Male ◽  
Home Ranges ◽  
Radio Tracking ◽  
Male And Female ◽  
Radio Transmitters ◽  
Range Overlap ◽  
And Behavior ◽  
Free Ranging ◽  
Sexually Mature

Miniature radio transmitters and 'local' triangulation methods were used to monitor the movements of free-ranging Peromyscus leucopus. A sexually mature male and female were studied in detail during two sessions within a 6-week period. Positions were recorded on 107 occasions, giving home ranges of 1.26 ha for the male and 0.91 ha for the female. Extensive home range overlap, correspondence in patterns of movement, the bearing of a litter by the female, and the lack of other adults in the study area indicate pair activity. The equipment and methods described will enable more thorough studies of the ecology and behavior of small, highly mobile rodent species in the future.

Radio-tagging and tracking of translocated trout cod (Maccullochella macquariensis: Percichthyidae) in an upland river

2009 ◽  
Vol 60 (4) ◽  
pp. 346 ◽  
Author(s):  
B. C. Ebner ◽  
L. Johnston ◽  
M. Lintermans
Keyword(s):  
Spatial Ecology ◽  
Effective Means ◽  
Release Site ◽  
Early Morning ◽  
Home Ranges ◽  
Radio Tracking ◽  
Natural Habitats ◽  
Radio Transmitters ◽  
Radio Tagging ◽  
Species Rarity

Radio-tracking provides an effective means of studying the spatial ecology of threatened fishes where almost inaccessible habitats and species rarity render conventional mark–recapture methods impractical. Initially, validation of an effective radio-tagging method is required; in the present study, an aquaria trial based on nine hatchery-reared, adult male Maccullochella maquariensis (Percichthyidae) was conducted. Fish resumed feeding within days of being internally implanted with a radio-tag, and tag rejection was not observed (0%, n = 9) based on a 2-month observational period. Following release into an upland stream, individual-specific movements resulted in upstream (n = 1) and downstream (n = 6) dispersal as well as fidelity to the release site (n = 2) at the completion of the study. Individuals established small home-ranges (mean length of river used by an individual per diel period ranged from 47 to 292 m) and were most active in the early morning and evening (n = 6). Complete survivorship of individuals bearing active radio-transmitters (n = 8) was recorded up until 4 months after release. However, an estimated zero or one individual was alive when the last active radio-tag expired 11 months after release (n = 8). The present study highlights the use of radio-tracking in monitoring the dispersal and survivorship of small numbers of hatchery-reared threatened fish released into natural habitats as part of species re-introduction programs.

Dispersal of subadult moose (Alces alces) in a nonmigratory population

1992 ◽  
Vol 70 (7) ◽  
pp. 1309-1314 ◽  
Author(s):  
Göran N. Cederlund ◽  
Håkan K. G. Sand
Keyword(s):  
Home Range ◽  
Alces Alces ◽  
First Year ◽  
Home Ranges ◽  
Radio Tracking ◽  
Sedentary Population ◽  
Linear Distance ◽  
Demographic Processes ◽  
Range Overlap ◽  
Demographic Features

Dispersal of subadult moose (Alces alces) in a sedentary population in central Sweden was studied during 1983 – 1989 by radio-tracking individuals for up to 11 seasons after their abandonment by the cow. Linear distance between geometric centers of natal area and consecutive home ranges increased with time among males, but not by more than about 4 km. The main increase occurred in autumn, probably due to rutting activities. Females maintained a fairly consistent distance of approximately 1 km throughout the study period. Seasonal home range overlap of natal area was negatively correlated with time for both sexes, but the patterns in the decrease differed. For males, the overlap was 10–40% after the first year, whereas female home ranges never overlapped by less than 40%. Overlap of consecutive seasonal home ranges increased significantly with age in both sexes. Neither sex dispersed out of the study area, since the animals were highly philopatric. The absence of dispersal (high philopatry) in moose in Fennoscandia is an important factor affecting demographic processes (and perhaps also genetic processes) within and between populations. It is important to distinguish different subpopulations of moose and manage them with respect to their unique demographic features.

Home ranges of free-ranging cats (Felis catus) in Brooklyn, New York

1989 ◽  
Vol 67 (1) ◽  
pp. 178-181 ◽  
Author(s):  
Carol Haspel ◽  
Robert E. Calhoon
Keyword(s):  
New York ◽  
Body Weight ◽  
Home Range ◽  
Home Range Size ◽  
Felis Catus ◽  
Range Size ◽  
Home Ranges ◽  
Utilization Distribution ◽  
Male And Female ◽  
Free Ranging

Home range size is stable among free-ranging cats in Brooklyn, New York. Marked male and female cats had mean home ranges of 2.6 (95% CI, 2.38–2.87) and 1.7 ha (95% CI, 1.57–1.98), respectively, as estimated by the population utilization distribution. Males had significantly larger home ranges, used the perimeter of their ranges more, and had greater variability in home range size than females. Gender differences in body weight accounted for observed differences in home range size; the seeking of estrous females by males could not account for differences in male and female home ranges. The availability of garbage or abandoned buildings, neighborhood, season, or experimental supplementary feeding did not influence home range size.

Notes on the Biology of the Portunid Crab, Portunus sanguinolentus (Herbst), in Subtropical Queensland Waters

1989 ◽  
Vol 40 (6) ◽  
pp. 711 ◽  
Author(s):  
WD Sumpton ◽  
GS Smith ◽  
MA Potter
Keyword(s):  
Carapace Width ◽  
Mature Female ◽  
Mature Male ◽  
Oceanic Water ◽  
Mating Period ◽  
Male And Female ◽  
Estuarine Waters ◽  
Portunid Crab ◽  
Sexually Mature

Trawl-caught Portunus sanguinolentus were more abundant in oceanic than estuarine waters in south- east Queensland. In samples, males outnumbered females by 1.7 : 1. Males attained a larger size than females and, for a given carapace width, weighed more than females. The smallest sexually mature male and female crabs had carapace widths of 83 and 74 mm respectively. Crabs recruited to the sampled population throughout most of the year except during winter, when moulting activity was also limited. April-May was a major mating period, and it is postulated that mature female crabs moved into deeper oceanic water to spawn.

Seasonal changes in spatial patterns and behavior of yearling male blue grouse on the breeding range

1983 ◽  
Vol 61 (12) ◽  
pp. 2777-2780 ◽  
Author(s):  
Ian G. Jamieson
Keyword(s):  
British Columbia ◽  
Home Range ◽  
Spatial Patterns ◽  
Seasonal Changes ◽  
Late Summer ◽  
Home Ranges ◽  
Breeding Range ◽  
Dendragapus Obscurus ◽  
Radio Transmitters ◽  
And Behavior

Changes in spatial patterns and behavior of yearling male blue grouse (Dendragapus obscurus) equipped with radio transmitters were recorded during spring and summer, 1980 and 1981, on Hardwicke Island, British Columbia. Sizes of home ranges decreased and yearlings appeared to become less dispersed as the season progressed. Most birds moved off their initial home range and onto new areas on the breeding range by late summer although the timing of this movement varied among individuals. Interactions involving yearling males with females and territorial males decreased as the season advanced. Changes in spatial patterns and behavior appear to be related to seasonal changes in levels of hormones in yearling males.

Instantaneous energetics of puma kills reveal advantage of felid sneak attacks

Science ◽  
2014 ◽  
Vol 346 (6205) ◽  
pp. 81-85 ◽  
Author(s):  
Terrie M. Williams ◽  
Lisa Wolfe ◽  
Tracy Davis ◽  
Traci Kendall ◽  
Beau Richter ◽  
...  
Keyword(s):  
Prey Size ◽  
Puma Concolor ◽  
Low Cost ◽  
Radio Tracking ◽  
Energetic Costs ◽  
Powerful Approach ◽  
Overall Dynamic Body Acceleration ◽  
And Behavior ◽  
Free Ranging ◽  
Species Movement

Pumas (Puma concolor) live in diverse, often rugged, complex habitats. The energy they expend for hunting must account for this complexity but is difficult to measure for this and other large, cryptic carnivores. We developed and deployed a physiological SMART (species movement, acceleration, and radio tracking) collar that used accelerometry to continuously monitor energetics, movements, and behavior of free-ranging pumas. This felid species displayed marked individuality in predatory activities, ranging from low-cost sit-and-wait behaviors to constant movements with energetic costs averaging 2.3 times those predicted for running mammals. Pumas reduce these costs by remaining cryptic and precisely matching maximum pouncing force (overall dynamic body acceleration = 5.3 to 16.1g) to prey size. Such instantaneous energetics help to explain why most felids stalk and pounce, and their analysis represents a powerful approach for accurately forecasting resource demands required for survival by large, mobile predators.

Population structure, turnover and movement of spotted-tailed quolls on the New England Tablelands

2004 ◽  
Vol 31 (5) ◽  
pp. 475 ◽  
Author(s):  
Gerhard Körtner ◽  
Shaan Gresser ◽  
Beth Mott ◽  
Bobby Tamayo ◽  
Phil Pisanu ◽  
...  
Keyword(s):  
Population Structure ◽  
New England ◽  
Mortality Rates ◽  
Home Ranges ◽  
Radio Tracking ◽  
Adult Males ◽  
Male And Female ◽  
Two Populations

Between 2000 and 2002 two populations of the spotted-tailed quoll (Dasyurus maculatus) were studied on the New England Tablelands using trapping surveys and radio-tracking. Overall, 85 individuals were trapped, but only two individuals were trapped throughout the 26 months of the study. Trapping was male-biased (74%). Adult males (>1 year) were substantially larger than females. On average, males travelled longer distances than females, and the maximum distances recorded were 8.1 and 3.9 km for a male and female respectively. Home ranges of males overlapped substantially, whereas those of females appeared to be exclusive. Mortality rates and the turnover in the quoll populations appeared to be substantial and at the beginning of autumn the populations comprised ~50% juveniles.

scholarly journals Histological Changes in the Regressing Reproductive Organs of Sexually Mature Male and Female Japanese Quail

1974 ◽  
Vol 11 (2) ◽  
pp. 168-179 ◽  
Author(s):  
Victor P. Eroschenko ◽  
Wilbor O. Wilson
Keyword(s):  
Japanese Quail ◽  
Reproductive Organs ◽  
Mature Male ◽  
Histological Changes ◽  
Male And Female ◽  
Sexually Mature

scholarly journals Size of Territories and Home Ranges of Male Western Yellow-breasted Chats (Icteria virens auricollis) in British Columbia

2012 ◽  
Vol 126 (2) ◽  
pp. 152 ◽  
Author(s):  
René McKibbin ◽  
Christine A. Bishop
Keyword(s):  
British Columbia ◽  
Density Estimation ◽  
Statistical Difference ◽  
Radio Telemetry ◽  
Kernel Density ◽  
Home Ranges ◽  
Radio Tracking ◽  
Icteria Virens ◽  
Radio Transmitters ◽  
The Mean

During 2005 and 2006, radio-transmitters were fitted to a total of 11 male Western Yellow-breasted Chats, Icteria virens auricollis, in the southern Okanagan River valley, British Columbia, to compare the area used, as detected by radio-telemetry and as defined by mapped observations of breeding males singing and perching. Data were only collected for 5 males. For 2005 and 2006, the 95% kernel density estimation (KDE) revealed that mean area used by male Western Yellow-breasted Chats, as determined by radio-tracking (n = 5), was 1.16 ha, whereas the mean area as defined by observations of breeding males singing and perching was 0.62 ha (no statistical difference). Our hypothesis that the area determined by radio-tracking would be significantly larger than the area defined by observations of males singing and perching was rejected, but the area determined by radio-tracking was almost twice the area defined by observations of breeding males singing and perching.

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