Short Note: Sleeping Sites Used by Giant Otters (Pteronura brasiliensis) in the Balbina Hydroelectric Reservoir, Central Brazilian Amazon

2015 ◽  
Vol 41 (2) ◽  
pp. 143-148 ◽  
Author(s):  
Fernando C. W. Rosas ◽  
Claudiane S. Ramalheira ◽  
Bruno F. Bozzetti ◽  
Ana F. Palmeirim ◽  
Andrews D. Cruz ◽  
...  
Keyword(s):  
Short Note ◽  
Brazilian Amazon ◽  
Hydroelectric Reservoir ◽  
Sleeping Sites ◽  
Pteronura Brasiliensis

First record of jaguar predation on giant otter (Pteronura brasiliensis)

2015 ◽  
Vol 65 (1) ◽  
pp. 81-86 ◽  
Author(s):  
Claudiane dos Santos Ramalheira ◽  
Bruno F. Bozzetti ◽  
Andrews D. da Cruz ◽  
Ana Filipa Palmeirim ◽  
Márcia M.M. Cabral ◽  
...  
Keyword(s):  
Food Chain ◽  
Radio Telemetry ◽  
Brazilian Amazon ◽  
First Record ◽  
Tree Trunk ◽  
Panthera Onca ◽  
Hydroelectric Reservoir ◽  
Frequent Use ◽  
Pteronura Brasiliensis ◽  
First Time

Top of the food chain predators are often not predated upon. However, even though the giant otter (Pteronura brasiliensis) is in that category, the literature mentions many species as potential predators, including the jaguar (Panthera onca). Notwithstanding up until now there has been no registered confirmation of jaguar predation on giant otters. A predation of a jaguar on an adult female giant otter was recorded for the first time during our radio-telemetry study on giant otters in Balbina hydroelectric reservoir in Central Brazilian Amazon. The female had had a transmitter implanted on February 2012 and was killed by a jaguar ninety-four days after the surgery. This giant otter was a solitary specimen, which was captured by a jaguar while asleep in a shelter under a fallen tree trunk on the banks of one of the reservoir’s islands. The solitary pattern found in such individuals combined with the frequent use of shelters, allows predators to access them more easily and may have contributed to the predation observed in this study.

scholarly journals Habitat, limnological signatures and spatial modeling: a zoning proposal for the Curuá-Una hydroelectric reservoir, Pará, Brazil

2019 ◽  
Vol 31 ◽  
Author(s):  
Juciley de Almeida Santos ◽  
Keid Nolan Silva Sousa ◽  
Paulo Roberto Brasil Santos ◽  
Joelson Leal de Lima ◽  
Rivolo de Jesus Bacelar
Keyword(s):  
Correspondence Analysis ◽  
Spatial Modeling ◽  
Longitudinal Axis ◽  
Brazilian Amazon ◽  
Geostatistical Analysis ◽  
Hydroelectric Dams ◽  
Hydroelectric Reservoir ◽  
Data Variability ◽  
Degree Of Association ◽  
Local Gradient

Abstract Aim The objective of this work is to characterize, spatially model and to perform the zoning of the aquatic environment in the Curuá-Una HPP reservoir, in the state of Pará, in the Brazilian Amazon. Methods The data were collected from 77 sampling points distributed over 20 transects in the Curuá-Una reservoir, in November 2016. The data were obtained through descriptive templates of the landscape, and assessment of limnological, bathymetry and georeferencing variables. To describe and model spatial patterns for the limnological Proxies, geostatistical analysis was used with semivariogram fitting, and interpolation using Ordinary Kriging to generate the maps. To determine the degree of association of the landscape Proxies, Correspondence Analysis (CA) was chosen, and to relate the landscape Proxies with the limnological Proxies, Canonical Correspondence Analysis (CCA) was carried out. Results The results of the analysis of the limnological Proxies showed that the variables presented normal distribution according to the Shapiro-Wilk test (5%) except for transparency and temperature. Most of the variables obtained well-defined, level and good geostatistical analysis. There was a prevalence of gaussian and spherical adjustment models. Different zones in the distribution of the limnological variables in the longitudinal axis of the reservoir were observed. The CA showed a short local gradient in the variables, which effectively characterizes the interface of landscape and human. In Figure 5, the first two axes of the CCA showed 61.17% of the data variability. The limnological signatures showed 42.3% of variability, with high correlation between the landscape Proxies and the environmental Proxies in both axes. Conclusions This type of approach should be useful in managing Brazilian river basins, especially in the Amazon, a focus for the construction of numerous hydroelectric dams, as it can indicate the limnological and environmental state and provide a clearer view of these environments.

Conflict between Fishermen and Giant Otters Pteronura brasiliensis in Western Brazilian Amazon

Biotropica ◽  
2011 ◽  
Vol 44 (3) ◽  
pp. 437-444 ◽  
Author(s):  
Patrícia F. Rosas-Ribeiro ◽  
Fernando C.W. Rosas ◽  
Jansen Zuanon
Keyword(s):  
Brazilian Amazon ◽  
Pteronura Brasiliensis

scholarly journals Cub biometry, litter size and reproductive period of giant oters (Pteronura brasiliensis) at the Balbina Hydroelectric Reservoir, Amazonas, Brazil

2015 ◽  
Vol 10 (2) ◽  
pp. 115-121 ◽  
Author(s):  
Bruno Freitas Bozzetti ◽  
Márcia Munick Mendes Cabral ◽  
Fernando Weber Rosas
Keyword(s):  
Litter Size ◽  
Reproductive Period ◽  
Average Weight ◽  
Reproductive Parameters ◽  
Human Occupation ◽  
Hydroelectric Reservoir ◽  
Flood Season ◽  
Pteronura Brasiliensis ◽  
Birth Records ◽  
Free Ranging

According to the literature, giant otters produce one to six cubs at each gestation, with birth peaks occurring from the end of the flood season to the beginning of the low-water period. With the aim of describing some reproductive parameters of the giant otters living in a hydroelectric lake, 56 field excursions to Balbina Hydroelectric Reservoir, hereafter Balbina Lake, were carried out between September 2001 and September 2010 in order to gather information about cub weight and length, litter size and reproductive period of the species in that area. About 80% of the birth records occurred between September and December, characterized by the receding water season and the beginning of the dry season. The number of cubs per gestation varied from one to three animals (mean = 2; n = 36) and average weight and length of neonates were 316.25 ± 64.21g (n = 4) and 31.75 ± 4.86cm (n = 4), respectively. The reproductive period and the litter size produced by giant otters in Balbina Lake were within the range reported in literature for non-dammed areas, indicating that these reproductive parameters were not changed by the reservoir. The weight of cubs analyzed in the reservoir was in average 35% greater than the weight of captive newborn cubs reported in the literature. However, as the animals here analyzed were healthy, it is reasonable to assumethat they represent the weight of free-ranging newborn cubs. Artificial lakes had been reported in the literature as favorable environments for giant otters in Guyana, and the results obtained here seem to corroborate this hypothesis and show the plasticity of the species in its use of different habitats as long as the habitats are inside some category of protection, in this way minimizing additional impacts caused by an intense human occupation of the area. 

Introduction

2018 ◽  
Author(s):  
Peter Hopkins
Keyword(s):  
Final Section ◽  
Short Note ◽  
Current Situation ◽  
Research Projects ◽  
Everyday Lives ◽  
Early Settlement ◽  
The Everyday ◽  
Initial Research

The chapters in this collection explore the everyday lives, experiences, practices and attitudes of Muslims in Scotland. In order to set the context for these chapters, in this introduction I explore the early settlement of Muslims in Scotland and discuss some of the initial research projects that charted the settlement of Asians and Pakistanis in Scotland’s main cities. I then discuss the current situation for Muslims in Scotland through data from the 2011 Scottish Census. Following a short note about the significance of the Scottish context, in the final section, the main themes and issues that have been explored in research about Muslims in Scotland.

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