scholarly journals Movement patterns and home range of wild and re-stocked Arapaima gigas (Schinz, 1822) monitored by radio-telemetry in Lake Imiria, Peru

2015 ◽  
Vol 31 ◽  
pp. 10-18 ◽  
Author(s):  
J. Núñez-Rodríguez ◽  
F. Duponchelle ◽  
M. Cotrina-Doria ◽  
J.-F. Renno ◽  
C. Chavez-Veintimilla ◽  
...  
Keyword(s):  
Home Range ◽  
Radio Telemetry ◽  
Movement Patterns ◽  
Arapaima Gigas

scholarly journals Movement patterns and home range in Diplomystes camposensis (Siluriformes: Diplomystidae), an endemic and threatened species from Chile

2018 ◽  
Vol 16 (1) ◽  
Author(s):  
Alejandra Oyanedel ◽  
Evelyn Habit ◽  
Mark C. Belk ◽  
Katherin Solis-Lufí ◽  
Nicole Colin ◽  
...  
Keyword(s):  
Home Range ◽  
Radio Telemetry ◽  
High Mobility ◽  
Movement Patterns ◽  
Large River ◽  
San Pedro River ◽  
Portable Radio ◽  
Upstream Direction ◽  
Dam Building ◽  
Large Home Range

ABSTRACT We document movement patterns and home range of Diplomystes camposensis, an endemic and threatened freshwater catfish from Chile. We tracked the movements of seven individuals of different body size (13.5 to 19 cm SL) using portable radio telemetry equipment to investigate movement patterns in relation to day/night activity and habitat use in the San Pedro River (Valdivia Basin). Tracked movements and model-based analyses revealed that D. camposensis has a large home range and high mobility. The average home range was 0.068163 ± 0.033313 km2, and the average area of higher activity was 0.005646 ± 0.011386 km2. The mean linear home range was 387.4 m. The results also showed that movements were longer during the night, supporting nocturnal habits. Movements tended to be in an upstream direction for some individuals, although these differences were not significant when data was pooled. Large home range and movements suggest that the species may require large river areas to meet ecological demands, an aspect that could be severely affected by fragmentation. These results, along with previously published genetic data, suggest that the conservation of D. camposensis would be seriously threatened by hydromorphological alterations (e.g. lack of connectivity), such as those resulting from dam building.

scholarly journals Site fidelity and movement of Chelonoidis carbonaria (Spix, 1824) (Testudinidae) in cocoa plantations in southeastern Brazil

2014 ◽  
Vol 74 (3 suppl 1) ◽  
pp. S135-S141
Author(s):  
JF Borini ◽  
BB Petrucci ◽  
W Krohling ◽  
JL Rossi Júnior ◽  
MRD Santos ◽  
...  
Keyword(s):  
Home Range ◽  
Site Fidelity ◽  
Radio Telemetry ◽  
Movement Patterns ◽  
Release Site ◽  
Southeastern Brazil ◽  
Natural Conditions ◽  
Behavioural Analysis ◽  
Forest Remnants ◽  
Radio Transmitters

Red-footed Tortoises (Chelonoidis carbonariaSpix, 1824) raised as pets and voluntarily handed over to environmental officers by their owners or apprehended by officers represent a large contingent of animals that overfill triage centres in Brazil. There is no consensus on the fate of these animals, and their numbers continue growing. In this study, we evaluated the movement patterns of C. carbonaria originating from triage centres in areas of cocoa plantations and forest remnants to define their home range and dispersion. After 120 days of quarantine and acclimatisation, eight C. carbonaria adults were released and monitored via radio telemetry for 10 months. The radio transmitters of two individuals presented problems, and consequently, it was not possible to track these individuals. Five individuals remained in an area of 7.75 ha 10 months after release, avoiding contact with humans after the first three months. The greatest problems were the proximity of individuals to inhabited areas in the first three months after release, the death of two individuals, and the escape of one individual. After the experiment, the animals were sent back to the triage centre. Our results suggest that a proportion of the animals in the triage centres are able to survive in natural conditions. Considering their survival and fidelity to the release site, the translocation of animals described herein should be considered partially successful. However, if this measure is adopted, it must be preceded by studies of the animals' origins and by a rigorous genetic, sanitary and behavioural analysis of each individual.

Spatial ecology of the quokka (Setonix brachyurus) in the southern forests of Western Australia: implications for the maintenance, or restoration, of functional metapopulations

2020 ◽  
Vol 42 (1) ◽  
pp. 38
Author(s):  
Karlene Bain ◽  
Adrian Francis Wayne ◽  
Roberta Bencini
Keyword(s):  
Home Range ◽  
Western Australia ◽  
Riparian Vegetation ◽  
Spatial Ecology ◽  
Radio Telemetry ◽  
Movement Patterns ◽  
Home Range Size ◽  
Range Size ◽  
Habitat Patches ◽  
Preferred Habitat

We used radio-telemetry to investigate the home-range size and movement patterns of the quokka (Setonix brachyurus) in the southern forests of Western Australia to assess the ability of animals to move between increasingly segregated habitat patches and to identify implications for metapopulation function. We found that quokkas in this region have a much larger home range (71 ± 5.8 ha) and move larger distances (up to 10 km per night) than previously reported for this species in other regions. Temporal and sex variations in home-range size, overlap and movement patterns provided insights into the social structure, reproductive strategies and resource availability for the species in this part of its range. Quokkas moved up to 14 km between habitat patches, where these patches were connected by dense riparian vegetation. While riparian vegetation was used exclusively for movement between habitat patches, quokkas spent only 40% of their time in this ecotype. The current management paradigm of protecting linear riparian vegetation as habitat for quokkas is important for maintaining habitat connectivity, but is unlikely to meet broader habitat and spatial requirements. Management of preferred habitat as well as riparian corridors is necessary for the maintenance of a functional metapopulation.

Ontogenetic and seasonal shifts in movement and habitat selection of the alligator snapping turtle (Macrochelys temminckii)

2021 ◽  
pp. 1-10
Author(s):  
Saidee J. Hyder ◽  
Joshua R. Ennen ◽  
Jon M. Davenport
Keyword(s):  
Habitat Selection ◽  
Home Range ◽  
Habitat Use ◽  
Radio Telemetry ◽  
Movement Patterns ◽  
Tree Canopy ◽  
Tree Cover ◽  
Convex Polygons ◽  
Macrochelys Temminckii ◽  
Tree Canopy Cover

Abstract We aimed to discern the seasonal movement patterns, home range sizes, and microhabitat associations of subadult Macrochelys temminckii in a West Tennessee population. Because this population was previously monitored (i.e., telemetry and habitat use) as juveniles after the initial release in 2005, studying the movement ecology and habitat use of the same released cohort 12 years later allows for unique comparisons between hatchling and subadult ecology. We used radio telemetry to collect movement and microhabitat data of 16 subadult M. temminckii during one year. Our results suggest that seasonal and ontogenetic variation in movement patterns and habitat selection occur within a cohort of M. temminckii. Compared to juveniles, subadults used deep slough areas with high overstory tree cover and had larger home ranges (100% minimum convex polygons [MCP]). Additionally, as subadults, the mean distance moved (m) varied among seasons and furthest during summer. Subadults used deeper water, with higher temperatures and significantly more tree canopy cover, than random locations. Overall, the home range estimate for subadults (mean MCP ± SE; 1.64 ± 0.57 ha) was greater than for juveniles (0.044 ± 0.021 ha). These home-range estimates and habitat usage patterns were similar to subadults in other studies. The seasonal and ontogenetic variations suggest that habitat heterogeneity is critical to sustain populations of introduced M. temminckii.

Home-range characteristics and movement patterns of the red-legged pademelon (Thylogale stigmatica) in a fragmented tropical rainforest

1995 ◽  
Vol 22 (6) ◽  
pp. 699 ◽  
Author(s):  
K Vernes ◽  
H Marsh ◽  
J Winter
Keyword(s):  
Body Weight ◽  
Home Range ◽  
Tropical Rainforest ◽  
Radio Telemetry ◽  
Movement Patterns ◽  
Forest Edge ◽  
Variable Range ◽  
Diurnal Range ◽  
Physical Features ◽  
Rate Of Movement

Home-range characteristics and movement patterns of five male and eight female red-legged pademelons (Thylogale stigmatica) were studied in north-eastem Queensland between September 1991 and June 1992 using radio-telemetry. In relation to mean body weight, the home range of T. stigmatica was small (mean = 2.26 ha, n = 9), individually variable (range 0.82-3.70 ha) and partitioned into spatially distinct diurnal and nocturnal components. The nocturnal range (mean = 1.00 ha,n = 6) incorporated forest edge and pasture habitat, and was somewhat smaller than the diurnal range (mean = 1.67 ha, n = l0), which was located entirely within the forest. Home-range shape was governed largely by the distance between the diurnal and nocturnal ranges, which in turn was related to physical features within the habitat. Pademelons moved slowly within and quickly between their diurnal and nocturnal ranges. Movement between these areas occurred just after dusk and just prior to dawn. The diurnal rate of movement (m min-1) was generally higher than the nocturnal rate, suggesting that pademelons moved extensively in the forest during the day, and were relatively sedentary whilst on pasture at night.

Movement patterns of feral predators in an arid environment – implications for control through poison baiting

2009 ◽  
Vol 36 (5) ◽  
pp. 422 ◽  
Author(s):  
K. E. Moseby ◽  
J. Stott ◽  
H. Crisp
Keyword(s):  
Home Range ◽  
Sand Dunes ◽  
Activity Patterns ◽  
Movement Patterns ◽  
Home Range Size ◽  
Range Size ◽  
Home Ranges ◽  
Feral Cats ◽  
Poison Baiting ◽  
Specific Variation

Control of introduced predators is critical to both protection and successful reintroduction of threatened prey species. Efficiency of control is improved if it takes into account habitat use, home range and the activity patterns of the predator. These characteristics were studied in feral cats (Felis catus) and red foxes (Vulpes vulpes) in arid South Australia, and results are used to suggest improvements in control methods. In addition, mortality and movement patterns of cats before and after a poison-baiting event were compared. Thirteen cats and four foxes were successfully fitted with GPS data-logger radio-collars and tracked 4-hourly for several months. High intra-specific variation in cat home-range size was recorded, with 95% minimum convex polygon (MCP) home ranges varying from 0.5 km2 to 132 km2. Cat home-range size was not significantly different from that of foxes, nor was there a significant difference related to sex or age. Cats preferred habitat types that support thicker vegetation cover, including creeklines and sand dunes, whereas foxes preferred sand dunes. Cats used temporary focal points (areas used intensively over short time periods and then vacated) for periods of up to 2 weeks and continually moved throughout their home range. Aerial baiting at a density of 10 baits per km2 was ineffective for cats because similar high mortality rates were recorded for cats in both baited and unbaited areas. Mortality was highest in young male cats. Long-range movements of up to 45 km in 2 days were recorded in male feral cats and movement into the baited zone occurred within 2 days of baiting. Movement patterns of radio-collared animals and inferred bait detection distances were used to suggest optimum baiting densities of ~30 baits per km2 for feral cats and 5 per km2 for foxes. Feral cats exhibited much higher intra-specific variation in activity patterns and home-range size than did foxes, rendering them a potentially difficult species to control by a single method. Control of cats and foxes in arid Australia should target habitats with thick vegetation cover and aerial baiting should ideally occur over areas of several thousand square kilometres because of large home ranges and long-range movements increasing the chance of fast reinvasion. The use of temporary focal points suggested that it may take several days or even weeks for a cat to encounter a fixed trap site within their home range, whereas foxes should encounter them more quickly as they move further each day although they have a similar home-range size. Because of high intra-specific variability in activity patterns and home-range size, control of feral cats in inland Australia may be best achieved through a combination of control techniques.

scholarly journals Predispersal home range shift of an ocelot Leopardus pardalis (Carnivora: Felidae) on Barro Colorado Island, Panama

2007 ◽  
Author(s):  
Rafael Mares ◽  
Ricardo S. Moreno ◽  
Roland W. Kays ◽  
Martin Wikelski
Keyword(s):  
Home Range ◽  
Radio Telemetry ◽  
Barro Colorado Island ◽  
Range Shift ◽  
Range Shifts ◽  
Home Ranges ◽  
Adult Size ◽  
Subadult Male ◽  
Leopardus Pardalis ◽  
Natal Home

Home range shifts prior to natal dispersal have been rarely documented, yet the events that lead a subadult to abandon a portion of its home range and venture into unfamiliar territories, before eventually setting off to look for a site to reproduce, are probably related to the causes of dispersal itself. Here, we used a combination of manual radio-tracking and an Automated Radio Telemetry System to continuously study the movements of a subadult male ocelot (Leopardus pardalis), a solitary carnivore with sex-biased dispersal, on Barro Colorado Island, Panama, for 18 months from May 2003 through October 2004. The subadult ocelot?s parents were also radio-tracked to record possible parent-offspring interactions within their home ranges. At the age of ca. 21 months the subadult gradually began to shift its natal home range, establishing a new one used until the end of the study, in an area that had previously been used by another dispersing subadult male. Only three parent-offspring interactions were recorded during the four months around the time the range-shift occurred. The apparent peaceful nature of these encounters, along with the slow transition out of a portion of his natal home range, suggest the subadult was not evicted from his natal area by his parents. The timing of the shift, along with the subadult?s increase in weight into the weight range of adult ocelots four months after establishing the new territory, suggests that predispersal home range shifts could act as a low risk and opportunistic strategy for reaching adult size, while minimizing competition with parents and siblings, in preparation for an eventual dispersal into a new breeding territory.

Habitat effects on home range and schooling behaviour in a herbivorous fish (Kyphosus bigibbus) revealed by acoustic tracking

2017 ◽  
Vol 68 (8) ◽  
pp. 1454 ◽  
Author(s):  
R. D. Pillans ◽  
R. C. Babcock ◽  
D. P. Thomson ◽  
M. D. E. Haywood ◽  
R. A. Downie ◽  
...  
Keyword(s):  
Home Range ◽  
Patch Reef ◽  
Movement Patterns ◽  
Herbivorous Fish ◽  
Ecological Role ◽  
Patch Reefs ◽  
Poor Understanding ◽  
Schooling Behaviour ◽  
Acoustic Tags

Large mobile herbivorous fish that specialise in browsing large brown algae are particularly important on coral reefs because their activities mediate algal–coral competition. Despite this important ecological role, we have a poor understanding of the movement patterns of such large herbivorous fish, including Kyphosus bigibbus. Nineteen K. bigibbus captured near adjacent but distinct patch reefs were tagged with internal acoustic tags and their movements monitored for up to 20 months by an array of 60 acoustic receivers. Home-range estimates showed that movements of individuals from each patch reef encompassed different spatial extents and resulted in differences in habitat used by the two groups of fish. The average 50 and 95% kernel utilisation distribution for long-term resident fish was 0.27±0.03 and 1.61±0.30km2 respectively, ranges that represent the largest values for a herbivorous coral reef fish recorded to date. There was a significantly higher degree of fidelity among fish from the same school, and to particular patch reefs, despite the proximity of the reefs and substantial overlap between schools of conspecifics. A coefficient of sociality was used on pairs of fish and showed that there was no evidence that individuals were consistently detected together when they were detected by receivers away from their home reef. The variability of movement patterns among individuals of K. bigibbus results in an increased niche footprint for this important browser, potentially increasing reef resilience.

Movement Patterns and Home Range in the Common Opossum (Didelphis marsupialis)

1987 ◽  
Vol 68 (1) ◽  
pp. 173-176 ◽  
Author(s):  
M. E. Sunquist ◽  
S. N. Austad ◽  
F. Sunquist
Keyword(s):  
Home Range ◽  
Movement Patterns ◽  
The Common
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