scholarly journals Spatial ecology of little egret (Egretta garzetta) in Hong Kong uncovers preference for commercial fishponds

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9893
Author(s):  
Chun-chiu Pang ◽  
Yik-Hei Sung ◽  
Yun-tak Chung ◽  
Hak-king Ying ◽  
Helen Hoi Ning Fong ◽  
...  
Keyword(s):  
Hong Kong ◽  
Home Range ◽  
Habitat Use ◽  
Spatial Ecology ◽  
Intertidal Mudflat ◽  
Seasonal Movement ◽  
Breeding Habitats ◽  
Natural Wetlands ◽  
Egretta Garzetta ◽  
Wetland Types

Many natural wetlands have been converted to human-influenced wetlands. In some instances, human-influenced wetlands could provide complementary habitats for waterbirds, compensating for the loss of natural wetlands. Inner Deep Bay in Hong Kong is composed of both natural and human-influenced wetlands and is under immense development pressure. From an ecology perspective, we need to understand if different wetland types play the same ecological role. To achieve this, we tracked nine little egrets (Egretta garzetta) using GPS loggers for 14 months to study their spatial ecology, home range, movement and habitat use. We found that over 88% of the home range of all individuals comprised of wetlands (commercial fishponds, mangrove, gei wai, channel, and intertidal mudflat). Among these wetland types, nearly all (seven of nine) individuals preferred commercial fishponds over other habitats in all seasons. Little egrets exhibited seasonal movement and habitat use among seasons, with largest home range, greatest movement, and most frequent visits to commercial fishponds in winter compared to spring and autumn. Our results highlight the significant role of commercial fishponds, providing a feeding ground for little egrets. However, other wetland types cannot be ignored, as they were also used considerably. These findings underscore the importance of maintaining a diversity of wetland types as alternative foraging and breeding habitats.

scholarly journals OCELOT Leopardus pardalis (CARNIVORA: FELIDAE) SPATIAL ECOLOGY IN A FRAGMENTED LANDSCAPE OF COLOMBIA

2015 ◽  
Vol 5 (1) ◽  
pp. 17
Author(s):  
Cristian Cruz-Rodríguez ◽  
José F. González-Maya ◽  
Abelardo Rodríguez-Bolaños ◽  
Amancay A. Cepeda-Mercado ◽  
Diego Zárrate-Charry ◽  
...  
Keyword(s):  
Home Range ◽  
Habitat Use ◽  
Spatial Ecology ◽  
Home Range Size ◽  
Range Size ◽  
Caribbean Region ◽  
Fragmented Landscape ◽  
Leopardus Pardalis ◽  
Fragmented Landscapes ◽  
Disturbed Habitats

ABSTRACTOcelots Leopardus pardalis (Linnaeus, 1758) are one of the most common felids in the Neotropics and in the absence of large carnivores, can function as apex predators. Despite occupying numerous habitats across its range, including human-dominated landscapes, there is limited information on how ocelots use fragmented landscapes. We radio-tracked a female ocelot in a fragmented landscape of the Caribbean region of Colombia from November 2010 to January 2011 to estimate home range and habitat use. We obtained 100 locations overall; home range size was 9.64 km2 using the 95% fixed kernel density estimate. Rivers and roads were the main variables related with the locations and the ocelot selected for natural forests but also used disturbed habitats. Home range size and habitat use was similar to previous studies, but we observed greater use of disturbed habitats. As ocelots become the top predators in many fragmented landscapes of the Neotropics, it is important to understand how they use landscapes and could serve as surrogates for conservation.Keywords: Home range, habitat use, Sucre, radio-telemetry, Colombia.RESUMENEl ocelote Leopardus pardalis (Linnaeus, 1758) es uno de los felinos más comunes en el Neotrópico y en ausencia de los grandes carnívoros, pueden funcionar como depredadores tope. A pesar de ocupar numerosos hábitats a través de su distribución, incluyendo paisajes dominados por el hombre, hay información limitada sobre cómo los ocelotes utilizan paisajes fragmentados. Realizamos radio-seguimiento de un ocelote hembra en un paisaje fragmentado de la región Caribe de Colombia entre noviembre de 2010 y enero de 2011 para estimar el ámbito hogareño y uso de hábitat. Se obtuvieron 100 ubicaciones en total; el ámbito de hogar fue de 9.64 km2 utilizando la estimación de la densidad del núcleo fijo del 95%. Los ríos y las carreteras fueron las principales variables relacionadas con las ubicaciones así como el individuo prefirió los bosques naturales, pero también utilizó hábitats perturbados. El tamaño del ámbito hogareño y uso de hábitat fue similar a estudios previos, pero se observó un mayor uso de los hábitats perturbados. A medida que los ocelotes se convierten en los principales depredadores en muchos paisajes fragmentados del Neotrópico, es importante entender cómo usan los paisajes y podrían servir como especies sustitutas en conservación.Palabras clave: ámbito de hogar, uso de hábitat, Sucre, radio-telemetría, Colombia.

SPATIAL ECOLOGY OF WINTINGACCIPITERHAWKS: HOME RANGE, HABITAT USE, AND THE INFLUENCE OF BIRD FEEDERS

The Condor ◽  
2008 ◽  
Vol 110 (2) ◽  
pp. 260-268 ◽  
Author(s):  
TIMOTHY C. ROTH ◽  
WILLIAM E. VETTER ◽  
STEVEN L. LIMA
Keyword(s):  
Home Range ◽  
Habitat Use ◽  
Spatial Ecology ◽  
Bird Feeders

Home range, habitat use and movements by the little raven (Corvus mellori) in a coastal peri-urban landscape

2015 ◽  
Vol 42 (6) ◽  
pp. 500 ◽  
Author(s):  
Desley A. Whisson ◽  
Michael A. Weston ◽  
Kelly Shannon
Keyword(s):  
Home Range ◽  
Habitat Use ◽  
Spatial Ecology ◽  
Coastal Wetland ◽  
Urban Landscape ◽  
Habitat Preferences ◽  
Urban Environments ◽  
Home Ranges ◽  
Convex Polygons ◽  
Natural Habitats

Context In peri-urban environments, high availability of anthropogenic resources may result in relatively high abundances of some species, with potentially negative implications for other native biota. Effective management of such impacts requires understanding of the spatial ecology of problem species. However, home range and habitat use have not been described for the little raven (Corvus mellori), a superabundant native predator that occurs in urban and natural habitats, including those where threatened shorebirds breed. Aims The aim of this study was to provide basic information on little raven home range, habitat use and movements in a coastal peri-urban landscape. Methods Between October 2011 and January 2012 we radio-tracked 20 little ravens captured in a coastal wetland (near Melbourne, Australia). Key results Little ravens were highly mobile, moving up to 9.9 km in an hour (median = 2 km), and had large ranges: Minimum Convex Polygons were 1664–9989 ha (median = 3362 ha). Although most birds used both anthropogenic and natural habitats, some birds strongly selected for coastal wetland habitat. Birds used multiple roosts during the study period, most of which occurred in grassland (58.7%) or urban (22.3%) areas. Movement of up to 8.3 km (median = 2.2 km) between roosts during the night was also detected. Conclusions Ravens were highly mobile and used large home ranges and a variety of habitats, with habitat preferences varying between birds. Implications Considering the large home ranges and inter-individual variation in habitat preferences of little raven populations, localised management to reduce their impacts on breeding shorebirds is unlikely to be successful.

scholarly journals Home Range Estimates and Habitat Use of Siberian Flying Squirrels in South Korea

Animals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1378
Author(s):  
Jong-U. Kim ◽  
Jun-Soo Kim ◽  
Jong-Hoon Jeon ◽  
Woo-Shin Lee
Keyword(s):  
Home Range ◽  
South Korea ◽  
Habitat Use ◽  
Spatial Ecology ◽  
Deciduous Forest ◽  
Ecological Data ◽  
Flying Squirrel ◽  
Daily Movement ◽  
Flying Squirrels ◽  
Radio Transmitters

Conservation measures or management guidelines must be based on species’ ecological data. The home range of the target species was studied to understand its spatial ecology, in order to protect it. The Siberian flying squirrel is the only flying squirrel species present and is considered as a protected species in South Korea. In this study, we investigated the home range, habitat use, and daily movement of Siberian flying squirrels from February 2015 to June 2016 at Mt. Baekwoon, Gangwon Province, South Korea. We tracked 21 flying squirrels using radio transmitters and analyzed the home range of 12 individuals. Flying squirrels appeared to have an overall mean home range of 18.92 ± 14.80 ha with a core area of 3.54 ha ± 3.88 ha. Movement activity peaked between 18:00–19:00 with the longest distance traveled, coinciding with sunset. In addition, we observed the preference of Siberian flying squirrels to the old deciduous forest with dense crowns. The results of the present study indicate that it is important to manage their habitat; for instance, preserving an appropriate size of mature deciduous forest is essential for Siberian flying squirrels. While our study provides needed baseline information on the spatial activity of the species, further research on topics such as the national distribution, behavior, and population dynamics of Siberian flying squirrels is needed in South Korea.

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