Estimación de cambios temporales de la condición corporal del borrego cimarrón (Ovis canadensis weemsi) a partir de fotointerpretación
DOI:
https://doi.org/10.21829/azm.2020.3612235Palabras clave:
apófisis, condición corporal, cámaras trampa, energía, grasa, proteína crudaResumen
A partir de una escala de cinco puntos como método no invasivo, se analizaron imágenes obtenidas por foto trampeo, para visualizar partes corporales (espina dorsal, costillas y cadera) de los borregos, y detectar cambios estacionales de la condición corporal de machos y hembras evaluando el consumo de proteína obtenida a partir de su contenido en los forrajes. Se emplearon 20 cámaras trampa, ubicadas particularmente en cuerpos de agua superficiales. Se identificaron 199 animales en los dos años de muestreo; 120 en 2010 y 79 en 2011. Respecto a la escala de puntuación, se encontró un mayor número de individuos en las categorías C3 (moderada, n = 109), C2 (mala, n = 44), C4 (buena, n = 32) y con el menor número C5 (excelente, n = 9) y C1 (muy mala, n = 5). Se observó una correlación positiva entre las categorías de condición corporal y el consumo de proteína (r = 0.40, P < 0.05). La proteína cruda fue la variable explicativa de mayor importancia, relacionándose positivamente con las categorías de condición corporal (R2 = 0.166, F= 38.8, P <0.0001) de los borregos. En general, los borregos se observaron en categorías intermedias de condición corporal (C3). Las hembras se encontraron en las categorías de muy mala, mala y moderada. Los machos se encontraron en moderada, buena y excelente condición corporal. Este método permitió visualizar y analizar la condición corporal de los borregos en diferentes épocas, siendo posible utilizarlos como herramienta para detectar cambios en el hábitat natural (cantidad y calidad del forraje) y aplicarlo como un método alternativo dentro de las estrategias de manejo y conservación de las poblaciones naturales de borrego cimarrón.
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