Feeding resource partitioning among four sympatric carnivores in the Peneda-Gerês National Park (Portugal)

An increasing intensity of camera traps recorded the presence of poorly known and globally Endangered Asiatic Wild Dogs Cuon alpinus from different locations in recent years in Nepal. After 18 years since the previous report, we recorded 29 photos and a video of Dholes in four independent detections with an effort of 4,035 trap-nights during camera trap surveys targeted at tigers in the winter of 2016/2017. Solitary dholes were camera-trapped from four locations within 27.45km2 area in Bardia National Park. The evidence of a dead Dhole probably killed in retaliation shows the threat to the species. Dholes co-exist in Bardia with sympatric carnivores like Tiger Panthera tigris, Leopard Panthera pardus, and Jackal Canis aureus.

Download Full-text

Resource partitioning between Microlophus occipitalis and Stenocercus puyango (Sauria: Tropiduridae) in Cerros de Amotape National Park, Tumbes, Peru

Revista Peruana de Biología ◽

10.15381/rpb.v28i3.21115 ◽

2021 ◽

Vol 28 (3) ◽

pp. e21115

Author(s):

Alfredo Guzmán ◽

Juan Carlos Jordán

Keyword(s):

Resource Partitioning ◽

National Park ◽

Trophic Niche ◽

Dry Forest ◽

Microhabitat Use ◽

Insect Larvae ◽

Mean Body Temperature ◽

Transitional Area ◽

The Pacific ◽

Environmental Air

Activity, microhabitat use, and diet are patterns commonly used to define the saurian community structure, because of differential exploitation allowing coexistence at the same time and place. We analyze resource partitioning between two sympatric saurian species, Stenocercus puyango and Microlophus occipitalis, in the transitional area of the Pacific Tropical Forest and the Dry Forest inside Cerros de Amotape National Park (PNCA) in Tumbes, northwestern of Peru. Microlophus occipitalis and S. puyango both showed a unimodal activity pattern with higher activity around 13:00 h, with a mean body temperature of 34.83 °C and 32.17 °C respectively, observing a significant relationship between body and environmental (air and substrate) temperatures. Rocks and tree trunks were the most frequent microhabitats used by M. occipitalis while S. puyango were registered more frequently over leaf litter. The diets of both tropidurids were composed by arthropods, ants, and insect larvae mainly. Similarities in activity times (temporal niche) and diet (trophic niche) should be related to phylogenetic relationship and environmental characteristics of PNCA (seasonality, vegetal composition) meanwhile differences in space use and microhabitat thermal quality will be related to thermal quality in the area.

Download Full-text

Reptiles and Amphibians of the Addo Elephant National Park

Koedoe ◽

10.4102/koedoe.v30i1.503 ◽

1987 ◽

Vol 30 (1) ◽

Author(s):

W.R. Branch ◽

H.H. Braack

Keyword(s):

Resource Partitioning ◽

National Park ◽

East Coast ◽

Conservation Status ◽

Kruger National Park ◽

Eastern Cape ◽

Relative Composition

The results of a survey of the reptiles and amphibians of the Addo Elephant National Park (AENP) are presented. A total of 49 species, comprising 16 amphibians, 14 lizards, 15 snakes and 4 chelonians, occur in the AENP. Observations on the biology and distribution of these species in the AENP are given, and the relative composition and diversity is compared with the herpetofauna of the surrounding eastern Cape and the more distant Kruger National Park. The zoogeographic affinities of the AENP herpetofauna are similar to those of the surrounding eastern Cape (i.e. Cape Temperate 46,9, Temperate- Transitional 16,3, Eastern Tropical Transitional 10,2, Western Tropical Transitional 8,2, Tropical East Coast Littoral 2,0 and Temperate Wideranging 16,3). Resource partitioning among the AENP herpetofauna is discussed and the conservation status of the species summarised. A list of species that may still be collected within the AENP is included.

Download Full-text

Ultrastructural Localization of Phycocyanin in the Acidophilic, Thermophilic Alga, Cyanidium Caldarium

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100072757 ◽

1973 ◽

Vol 31 ◽

pp. 462-463

Author(s):

M. R. Edwards ◽

J. D. Mainwaring

Keyword(s):

Yellowstone National Park ◽

National Park ◽

Ultrastructural Localization ◽

Review Of Literature ◽

Cyanidium Caldarium ◽

Taxonomic Rank ◽

Thin Sections ◽

Standard Methods ◽

Laboratory Cultures

Although the general ultrastructure of Cyanidium caldarium, an acidophilic, thermophilic alga of questionable taxonomic rank, has been extensively studied (see review of literature in reference 1), some peculiar ultrastructural features of the chloroplast of this alga have not been noted by other investigators.Cells were collected and prepared for thin sections at the Yellowstone National Park and were also grown in laboratory cultures (45-52°C; pH 2-5). Fixation (glutaraldehyde-osmium), dehydration (ethanol), and embedding (Epon 812) were accomplished by standard methods. Replicas of frozenfracture d- etched cells were obtained in a Balzers apparatus. In addition, cells were examined after disruption in a French Press.

Download Full-text