Resource variability and conservation of American flamingos in coastal wetlands of Yucatan, Mexico

Article Abstract:

Wetlands show changes in water levels and rainfall according to seasons, and the response of waterbirds such as flamingos to extreme changes is important for conservation policies. Flamingo numbers at two sites in Yucatan, Mexico, did not change in response to food abundance. Hurricanes appear to be the key allogenic factor affecting these sites. The food base changes with the environment in terms of quality, and location of feeding sites. Flamingos need multiple foraging sites in these wetlands.

Habitat (Ecology), Habitats, Wildlife management, Wetlands, Flamingos

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Reproduction and survival of female mallards in the St. Lawrence River Valley, New York

Article Abstract:

The breeding ecology of female mallards in St. Lawrence River Valley, New York, was studied from Mar. 1990-Jul. 1992 to identify factors that influence reproductive success and survival. Results showed that predation and the availability of nesting sites are the primary factors affecting mallard survival. It was suggested that wildlife management programs for mallards should focus on maintaining wetlands to provide the birds with adequate cover against predators.

Mallard, Animal reproduction, Saint Lawrence River

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Winter survival of female northern pintails in Sinaloa, Mexico

Article Abstract:

The survival rates of northern pintails wintering in Sinaloa, Mexico, were studied using data gathered between 1970 and 1992. The results showed that survival rates were constant throughout the 1970s and 1980s. Between 1990 and 1992, however, northern pintail survival rates increased slightly due mainly to low hunter harvesting. It was suggested that current harvesting systems should be maintained to ensure continued growth in northern pintail populations.

Environmental aspects, Bird populations, Hunting, Animal wintering

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