LEUCISM IN THE PANTANAL CAIMAN (Caiman yacare): CASE REPORT

Abstract

This study aims to report and analyze the adapted management and development of a leucistic caiman (Caiman yacare) kept in captivity on a caiman farm located in Mato Grosso do Sul. Leucism is a rare genetic condition characterized by the partial loss of pigmentation in the skin, differing from albinism by the maintenance of ocular pigmentation. The case is based on a detailed description of the enclosure adaptations and housing protocols for the specimen during the period of January 2025. The need for rigorous environmental measures was observed, such as constant shading using 80% shade cloth and seasonal thermal protection, essential to mitigate sensitivity to ultraviolet radiation and prevent severe dermatological lesions. The main result evidenced is the longevity achieved by the leucistic individual in captivity, a significant achievement that attests to the effectiveness of the management protocols in overcoming the disadvantages inherent to its condition. Additionally, the study reports on the social grouping strategy of the individual with other alligators exhibiting congenital (tail agenesis) and acquired (facial trauma) anomalies, demonstrating the effectiveness of this measure in preventing conflicts and acts of cannibalism. It concludes that specific management is crucial for the viability of leucistic individuals, and this report contributes substantially to the scarce knowledge about chromatic anomalies in crocodilians, serving as a basis for future ex situ conservation protocols and genetic studies.