Padrão hematológico, hormonal e morfologia godanal de gavião-carijó (Rupornis magnirostris)

Abstract

Efforts on raptors conservation have been increased in last three decades, among them, we can point out breeding programs in captivity and zoos, scientific research, environmental education, rehabilitation and reintroduction. As result, more raptors have been met by veterinarians, requiring theoretical basis to perform an appropriate care, however, there is little literature available regarding Brazilian raptors reference values, both in captivity and free life. To generate such theoretical basis and minimize this gap in knowledge, blood and gonads samples of 12 Roadside hawk (Rupornis magnirostris) from Arruda Câmara Park – João Pessoa – PB, were collected in order to determine hematological parameters, hormonal values and gonadal morphology. Routine techniques were used for hematological analysis, histological and chemiluminescence for hematological determination, hormone levels and gonodal morphology. Hematological parameters found were Globular Volume: 0.36±0.04 L L-1, Red cells: 1.79±0.26 x1012 L-1, Hemoglobin: 199.55±13.01 g L-1, VGM: 199.55±13.01 fL, CHGM: 22.87 ± 1.96%, PPT: 5.15±1.19 g L-1, fibrinogen: 0.12±0.11 g L-1, leukocyte count: 13.28±5.45 x109 L-1 monocytes: 1.21±1.05 x109 L-1, Heterophile: 7.52±5.22 x109 L-1 lymphocytes: 0.73±0.64 x109 L-1 Eosinophils: : 1.43±1.38 x109 L-1 Basophils: 0.15±0.15 x109 L-1 , hormone TSH levels were 0.28±0.02 uUI mL-1, T3: 178.42±129.37 ng dL-1, T4: 1.46±1.04 mcg dL-1 FSH: 0.33±0.36 mUI mL-1, LH: 0.29±0.57 mUI mL-1, E2: 37.333±21.49 pg mL-1, Progesterone: 1.48±0.92 ng mL-1 and testosterone: 10.35±1.21 ng dL-1. Hematologic values of GV, erythrocytes and lymphocytes differ between naïve captivity birds and birds with at least one year in captivity, that difference can be associated to stress since naïve birds face a huge lifestyle change in captivity. T3 showed a significant difference between males and females and T3 and T4 were higher in moulting animals. Gonadal morphology were similar to other birds, however, was observed right ovary persistence in 66% of cases. Gonads were collected between June and July and demonstrated histological features of reproductive rest phase or beginning of proliferative period, showing same reproductive seasonality in Brazil’s northeastern, where seasons are not well defined. Results generate a Roadside Hawk hematological profile on two different occasions, when arriving in captivity and 13 after at least one year, and gonads hormonal and morphological data. Collected data plays a role as useful knowledge for clinical treatments on these birds, providing a better understanding of raptors reproduction, assisting species preservation.