The influence of resource seasonality on the breeding patterns of the Eurasian otter (Lutra lutra) in Mediterranean habitats
作者： Jordi Ruiz-Olmo , Josep Maria Olmo-Vidal , Sisco Mañas , Antoni Batet
DOI: 10.1139/Z02-186
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摘要: Litters of small Eurasian otter (Lutra lutra) cubs ranged from one to four, with those and two accounting for 95%. Significant variations were found between locations according the main diet (average ranging 1.1 2.4 cubs/female). We a seasonal pattern in breeding some areas, being different each. In Prepyrenees, most births took place March June (85%). Mediterranean rivers Ebro basin, occurred December February (57%). both, outside dens just 23 months after time birth. Fish crayfish exhibited fluctuation, maximum density biomass end spring summer minimum densities winter. Water was always flowing Pyrenees Prepyrenees rivers; however, rivers, important periods drought observed, concentrated especially winters. Timing birds corresponded variation abun...
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