Population energetics of northern pintails wintering in the Sacramento Valley, California

Article Abstract:

A study of northern pintails in California's Sacramento Valley has focused on their habitat and food requirements. Better management of winter habitat and food resources could help pintail populations to recover. Pintails eat between 49 g and 82 g of food daily from rice fields and wetlands, and their need for habitat and food is greatest in December and January when the population is at its peak. Daily energy expenditure peaks in January and February. The Sacramento Valley population appears to have adequate habitat and food sources.

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Reproduction in a declining population of wild turkeys in Arkansas

Article Abstract:

There has been a drop in the wild turkey population in the Arkansas Ouachita Mountains from 1987, and 106 hens have been studied to assess the reasons for this decline. The population was affected by small clutch sizes, low success in nesting, and low rates of incubation being initiated. Poult and hen survival does not appear to be the problem. Hens that were most successful in breeding had better body condition, so this appears to be the factor to focus on to increase reproductive success.

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Population biology of the Indo-Pacific Hump-backed Dolphin in Hong Kong waters

Article Abstract:

Research is presented concerning the population biology of the Hump-backed Dolphin in Hong Kong waters. The home ranges, movement patterns and distribution of the dolphins are analysed. Management and conservation issues are discussed.

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