External morphology and biometry of newborn agouti (Dasyprocta prymnolopha, Wagler 1831)
Morfologia externa e biometria de neonates de cutias (Dasyprocta prymnolopha, Wagler 1831)
Rev. bras. ciênc. vet; 30 (1), 2023
Publication year: 2023
Morphological features are essential to assess neonates’ viability. In order to characterize the morphology and biometry of newborn agouti, 36 animals born at 103 days of gestation under human care in Teresina-PI, Brazil were evaluated. After birth, the newborns were weighed on digital precision scales, measured with a flexible tape measure and their external morphology was assessed. The animals observed had coat color trait of adults, open eyes, hairs in the nasal region and four incisor teeth. The forelimbs had developed four digits and the hind limbs three digits, with white edged claws and a short hairless tail.
The following were observed:
weight of 144.58 ± 33.39g and lengths:
crown-rump 14.73 ± 1.82cm, total 19.88 ± 1.52cm, head to tail 16.95 ± 1.55cm, head 7.33 ± 0.59cm, thoracic girth 11.78 ± 1.36cm, abdominal girth 10.73 ± 1.21cm, tail length 1.18 ± 0.25cm, eye diameter 1.27 ± 0.27cm and ear length 0.21 ± 0.35cm. The agoutis presented morphological maturity at birth with external morphology very similar to that of the adult animals. Most of the births in this species are the double type and newborns that weigh more than 90g have better chances of survival in captivity.
As características morfológicas são essenciais para avaliar a viabilidade dos neonatos. Para caracterizar a morfologia e biometria de cutias recém-nascidas, foram avaliados 36 animais nascidos aos 103 dias de gestação sob cuidados em Teresina-PI, Brasil. Após o nascimento, os recém-nascidos foram pesados em balança digital de precisão, medidos com fita métrica flexível e avaliada sua morfologia externa. Os animais observados apresentavam traço de pelagem de adultos, olhos abertos, pelos na região nasal e quatro dentes incisivos. Os membros anteriores desenvolveram quatro dedos e os membros posteriores três, com garras brancas afiadas e uma cauda curta e sem pêlos.