Short Note: Tagging Giant Otters (Pteronura brasiliensis) (Carnivora, Mustelidae) for Radio-Telemetry Studies

Silveira, Leandro

doi:10.1578/am.37.2.2011.208

Cited by 10 publications

(4 citation statements)

References 10 publications

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“…Two dominant males and one subordinate male from different giant otter groups (G2, G10 and G12) were captured, chemically immobilized and implanted intraperitoneally with radio-transmitters (M1245B, Advanced Telemetry System, Isanti, Minnesota, weigh 42g), following [ 44 ]. Radiotagged giant otters were released after they recovered from the anesthesia at the place of capture or near their group.…”

Section: Methodsmentioning

confidence: 99%

Territoriality of Giant Otter Groups in an Area with Seasonal Flooding

2015

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Territoriality carries costs and benefits, which are commonly affected by the spatial and temporal abundance and predictability of food, and by intruder pressure. Giant otters (Pteronura brasiliensis) live in groups that defend territories along river channels during the dry season using chemical signals, loud vocalizations and agonistic encounters. However, little is known about the territoriality of giant otters during the rainy season, when groups leave their dry season territories and follow fish dispersing into flooded areas. The objective of this study was to analyze long-term territoriality of giant otter groups in a seasonal environment. The linear extensions of the territories of 10 giant otter groups were determined based on locations of active dens, latrines and scent marks in each season. Some groups overlapped the limits of neighboring territories. The total territory extent of giant otters was correlated with group size in both seasons. The extent of exclusive territories of giant otter groups was negatively related to the number of adults present in adjacent groups. Territory fidelity ranged from 0 to 100% between seasons. Some groups maintained their territory for long periods, which demanded constant effort in marking and re-establishing their territories during the wet season. These results indicate that the defense capacity of groups had an important role in the maintenance of giant otter territories across seasons, which may also affect the reproductive success of alpha pairs.

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Section: Methodsmentioning

confidence: 99%

Territoriality of Giant Otter Groups in an Area with Seasonal Flooding

2015

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“…In each campaign, we first searched for active dens suitable for setting traps (i.e., dens with 1 or few entrances relatively free of entanglements of roots and vegetation). We blocked the den entrance with a funnel-shaped net late at night, as described by Silveira et al (2011), and waited in the vicinity of the den to capture the individuals in the early morning. We captured 2 dominant males (from groups G2 and G12) and 1 adult subordinate male (group G10).…”

Section: Methodsmentioning

confidence: 99%

Space use by giant otter groups in the Brazilian Pantanal

et al. 2013

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“…She had a 4 month‐old pup. The capture protocol was as previously described for the species (Silveira et al , 2011), and carried out under ethical and governmental authorizations (SISBIO No. 27396‐6, and INPA Animal Research Ethics Committee No.…”

Section: Methodsmentioning

confidence: 99%

First report on the colpocytology and serum steroid hormone levels of Giant otters Pteronura brasiliensis

Amaral

Rosas

2020

International Zoo Yearbook

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Considering the importance of tools for the reproductive monitoring and management of Giant otters Pteronura brasiliensis in the wild or in captivity, this study reports the relationship among the colpocytology, reproductive serum hormone (progesterone and oestradiol) levels and ovarian morphology of adult Giant otters. Blood and vaginal cytology samples were obtained from four adult females (two free-ranging and two in human care). The ovaries were collected from the captive females. The data were correlated to define the phase of the oestrous cycle of each animal. The results suggest the feasibility of using hormone analysis or colpocytology to aid in the reproductive monitoring of Giant otters in human care. In addition, these tools could be used to define the reproductive status of individual wild Giant otters during capture procedures.

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Short Note: Tagging Giant Otters (Pteronura brasiliensis) (Carnivora, Mustelidae) for Radio-Telemetry Studies

Cited by 10 publications

References 10 publications

Territoriality of Giant Otter Groups in an Area with Seasonal Flooding

Territoriality of Giant Otter Groups in an Area with Seasonal Flooding

Space use by giant otter groups in the Brazilian Pantanal

First report on the colpocytology and serum steroid hormone levels of Giant otters Pteronura brasiliensis

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