Results 111 to 120 of about 234 (130)

Serum biochemical analytes in captive Amazonian manatees (Trichechus inunguis)

Veterinary Clinical Pathology, 2011
Background: Establishment of reference values for serum biochemical analytes is important for monitoring health and physiological status of captive animals.Objective: The purpose of this study was to measure and report ranges for serum biochemical analytes in Amazonian manatees (Trichechus inunguis).Methods: Blood samples were collected from 24 ...
Mello, Daniela Magalhães Drummond de, Silva, Vera Maria Ferreira da, Weber Rosas, Fernando Cesar   +2 more
openaire   +3 more sources

Acoustic tagging for counting feeding events of captive Amazonian manatees

The Journal of the Acoustical Society of America, 2012
The Amazonian manatee is one of four extant species in the mammalian order Sirenia. They are restricted to the freshwater rivers, lakes and floodplains of the Amazonian river basin where they eat floating and emergent aquatic plants. Visual observation of wild manatees is nearly impossible because of the turbid water and tiny exposure of nose at gentle
Mumi Kikuchi, Tomonari Akamatsu, Diogo A. de Souza, Fernando C. W. Rosas, Vera M. F. da Silva   +4 more
openaire   +1 more source

Hypoxia and Hypercapnia in the Respiratory Control of the Amazonian Manatee (Trichechus inunguis)

Physiological Zoology, 1980
The steady-state responses to hypoxia and hypercapnia were studied in freely diving Amazonian manatees (Trichechus inunguis). Breathing room air, the manatees had an end-dive alveolar O₂ Of 60 mm Hg and an alveolar CO₂ of 71 mm Hg. Minute ventilation increased linearly with inspired CO₂ during the hypercapnic breathing and the animals maintained a ...
openaire   +1 more source

Heart rates and gas exchange in the Amazonian Manatee (Trichechus inunguis) in relation to diving

Journal of Comparative Physiology B, 1986
Unrestrained Amazonian manatees (Trichechus inunguis) maintained a constant heart rate during diving and exhibited a slight tachycardia during breathing. 'Forcing' the manatees to dive caused a marked bradycardia. They exhibited a more pronounced tachycardia during breathing after 'forced' dives and hyperventilated during recovery dives.
Gallivan, Gordon James, Kanwisher, John W., Best, Robin C.   +2 more
openaire   +3 more sources

Apparent Dry-Season Fasting in Amazonian Manatees (Mammalia: Sirenia)

Biotropica, 1983
Amazonian manatees (Trichechus inunguis), restricted to deep water areas in the larger lakes in the central Amazon during the dry season, do not have any obvious food sources until water levels rise between 1-2 m. Evidence from Lago Amana suggests almost seven months of fasting.
openaire   +1 more source

Endocrine monitoring of the ovarian cycle in captive female Amazonian manatees (Trichechus inunguis)

Animal Reproduction Science, 2013
The Amazonian manatee (Trichechus inunguis; Mammalia: Sirenia), a threatened aquatic mammal endemic to the Amazon basin, is the only sirenian that lives exclusively in fresh water. Information about the reproductive endocrinology of the Amazonian manatee is scarce; therefore, the aim of this study was to monitor salivary progesterone and estradiol ...
Amaral, Rodrigo S., Weber Rosas, Fernando Cesar, Silva, Vera Maria Ferreira da, Nichi, Marcílio, Oliveira, Cláudio Alvarenga de   +4 more
openaire   +3 more sources

Occurrence ofCryptosporidiumspp. in Antillean Manatees (Trichechus manatus) and Amazonian Manatees (Trichechus inunguis) from Brazil

Journal of Zoo and Wildlife Medicine, 2011
Infections by Cryptosporidium spp. in aquatic mammals is a major concern due to the possibility of the waterborne transmission of oocysts. The aim of the present study was to report the occurrence of Cryptosporidium spp. in Antillean manatees (Trichechus manatus) and Amazonian manatees (Trichechus inunguis) from Brazil. Fecal samples were collected and
Joāo Carlos Gomes, Borges, Leucio Câmara, Alves, Maria Aparecida da Gloria, Faustino, Miriam, Marmontel   +3 more
openaire   +2 more sources

The implications of turning behaviour performed by Amazonian manatees after release into the wild

Journal of Ethology, 2011
Sirenians have dichromatic colour vision and tactile hairs but have not developed underwater echolocation. Amazonian manatees (Trichechus inunguis) live in turbid water and it has been unclear how they understand their surroundings. In this study, we recorded the 3D movements of two captive-raised Amazonian manatees.
Kikuchi, Mumi, Silva, Vera Maria Ferreira da, Weber Rosas, Fernando Cesar, Souza, Diogo, Miyazaki, Nobuyuki   +4 more
openaire   +2 more sources

RENAL FUNCTION PARAMETERS OF HEALTHY CAPTIVE AND SEMICAPTIVE AMAZONIAN MANATEES (TRICHECHUS INUNGUIS)

Journal of Zoo and Wildlife Medicine
Evaluating renal function is essential for managing captive wild animals, particularly threatened species like the Amazonian manatee (Trichechus inunguis) in rehabilitation and prerelease programs. A series of urine diagnostic tests, such as gross appearance, semiquantitative chemical analyses, microscopic review of sediments, and quantitative analyses
Daniela M D, de Mello, Christian P, Lourinho, Vera M F, da Silva   +2 more
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Artificial feeding for unwearied Amazonian manatees

International Zoo Yearbook, 1982
Best, Robin C., Ribeiro, Gilberto A., Yamakoshi, Megumi, Dasilva, Veram F.   +3 more
openaire   +2 more sources