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Análisis temporal de los hábitos alimentarios de la nutria neotropical (Lontra longicaudis) en el rio Zimatán en la costa de Oaxaca, México

2013; Asociacion Mexicana de Mastozoología A.C.; Volume: 4; Issue: 2 Linguagem: Inglês

10.12933/therya-13-138

2007-3364

Miguel Briones‐Salas, Mario Alberto Peralta-Pérez, Eréndira Arellanes,

Crustacean biology and ecology

Feeding habits of Lontra longicaudis were compared in two periods at Río Zimatan, ( of comparing the "Zimatan" transect in dry season, vs "La escalera" transect in rainy season (t (.o5(2),5) > 2,57).Also when comparing between years at the total of each transect (t (.05(2), 54) >2).Three species obtained the 73 % of scats during 1998 Atya ormanioides, Macrobrachium americanum y Gobiexus mexicanus Diversity found (0.9 bits/ind).The second period showed higher values (2.4bits/ind).Human activities such as eco-tourism increased in the area during the second period, causing changes in the foraging strategies of otters.Levin's index (5 to 11.9) showed convenient opportunistic habits, similar to equitativity (0.33 a 0.91).Variation in these indexes indicate niche amplitude is related to three or four species of crustaceans, mainly of the genera Macrobrachium and Atya.