Concentrações bioquímicas séricas de jacaré-açú (Melanosuchus niger) machos, adultos de vida livre

Abstract

Resumo: O jacaré-açu (Melanosuchus niger), pertencendo à família Aligatoridae, é considerado o maior predador aquático da América Continental. Como todos os répteis, possui particularidades para o uso de energia, controlando sua temperatura corporal nas variações climáticas. Essas variações podem revelar a situação metabólica atual desse animal, justificando o estudo de tais parâmetros. A importância desse trabalho se justifica pela escassez de estudos disponíveis na literatura. Nesse sentido, determinamos o perfil bioquímico de compostos sanguíneos de 12 jacarés açu, com peso de 77,66±8,92 kg, os quais foram: uréia (3,41±0,66), albumina (24,85±0,63), proteína total (63,83±16,97), ácido úrico (0,25±0,09), glicose (6,99±0,77), colesterol total (2,20±0,27), triglicérides (0,58±0,07), TGO (138,83±9,16) e TGP (12,47±2,82).

Blood Biochemical Reference Intervals of Black Caimans (Melanosuchus niger) and Spectacled Caimans (Caiman crocodilus) in the Brazilian Amazon Region

“…The 11 blood biochemical parameters analyzed for two species of Amazonian crocodilians were within the range found for other crocodilian species (Olsson and Phalen 2013;Hamilton et al 2016;Scheelings et al 2016;Adelakun et al 2019;No ´brega et al 2021;Balaguera-Reina et al 2022). However, our results established reference intervals for Cholesterol results in black caiman were close to those found in a va ´rzea habitat in central Amazonia (4.2 mmol/L; Duncan et al 2022) and similar (2.2 mmol/L) to those found in the same species in southern Amazonia, midwestern Brazil (Caixeta et al 2015). Total cholesterol in black caiman females (mean¼3.0661.31 mmol/L) was higher than in black caiman males (mean¼2.3360.95), suggesting that females may use cholesterol as a primary precursor for steroid hormone synthesis.…”

“…Cholesterol results in black caiman were close to those found in a várzea habitat in central Amazonia (4.2 mmol/L; Duncan et al 2022) and similar (2.2 mmol/L) to those found in the same species in southern Amazonia, midwestern Brazil (Caixeta et al 2015). Total cholesterol in black caiman females (mean=3.06±1.31 mmol/L) was higher than in black caiman males (mean=2.33±0.95), suggesting that females may use cholesterol as a primary precursor for steroid hormone synthesis.…”

“…Information on crocodilian physiology, such as blood biochemical intervals, is an important and minimally invasive tool for assessing individual and population health and for veterinary science (Friedrichs et al 2012;Nieto-Claudı ´n et al 2021). However, plasma biochemistry reference intervals for Amazonian crocodilians have been measured in individuals from outside of the Amazon basin and were determined with limited numbers of animals: 12 black caiman (Caixeta et al 2015) and 30 spectacled caiman (Monteiro 2015).…”

BASELINE DATA ON HEMATOLOGICAL AND BIOCHEMICAL PARAMETERS FOR THE USE OF WILD JUVENILE BROAD-SNOUTED CAIMAN (Caiman latirostris) AS BIOINDICATORS IN ATLANTIC FOREST, SOUTHEASTERN BRAZIL

“…Glucose levels are highly influenced by the fasting period (OLIVEIRA et al, 2014), and when the fasting period is unknown, as in free-living animals, the values found should be used with caution because there is no way to predict whether the specimens studied fed prior to their capture and blood collection. For a correct interpretation of serum levels of total cholesterol and triglycerides, the feeding history needs to be known (CAIXETA et al, 2015). In free-living caiman populations that inhabit the same area, this evaluation may reflect the availability of prey with a consequent reflection on the population studied (CAIXETA et al, 2015).…”

“…For a correct interpretation of serum levels of total cholesterol and triglycerides, the feeding history needs to be known (CAIXETA et al, 2015). In free-living caiman populations that inhabit the same area, this evaluation may reflect the availability of prey with a consequent reflection on the population studied (CAIXETA et al, 2015).…”