Energetics of molt in penguins

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Variation in digestive efficiency of captive North American river otters (Lontra canadensis) on various diets

Abstract 10.1002/zoo.20116.abs Energy content, proximate nutrient values, passage rate, and digestive efficiency associated with various diet types and factors affecting these parameters have not been quantified for the North American river otter (Lontra canadensis). We measured energy digestive efficiency (DEff) and intestinal passage rate of three captive river otters on their regular diet (a combination […]

Food consumption and growth of a female dusky dolphin (Lagenorhynchus obscurus)

Abstract 10.1002/1098-2361(2000)19:23.3.CO;2-P Food consumption, body measurements, weight changes, and body temperatures of a female dusky dolphin are presented for the 13 years that she was at Sea World, Durban. Her annual food consumption increased from 1,870 kg at the age of 3 years to 2,170 kg when she was 5 years old. During her sixth […]

Food consumption and growth of California sea lions (Zalophus californianus californianus)

Abstract 10.1002/1098-2361(2000)19:23.3.CO;2-F The daily food consumption of 26 California sea lions at the Harderwijk Marine Mammal Park was recorded. Average annual food consumption of males increased with age to stabilize at approximately 4,000 kg/year by the age of 10 years. Females showed a rapid increase in average annual food consumption until they were 3 years […]

Seasonal energy utilization in bamboo by the red panda (Ailurus fulgens)

Abstract 10.1002/(SICI)1098-2361(2000)19:13.3.CO;2-0 Seasonal energy intake and digestion of bamboo by red pandas were measured in energy balance trials at the field station at an altitude of 3,100 m in Yele Natural Reserve, Mianning County of Sichuan Province, Peoples Republic of China. Two-week trials were conducted at monthly intervals by feeding animals with only natural bamboo […]

Reproductive Ecology of Female Chimpanzees

An important adaptive problem for mammals in general, and primates in particular, is how females can manage the high costs of reproduction in the face of fluctuating energetic supplies. For many species, the best solution is to breed seasonally such that high costs are temporally coincident with predictable periods of resource abundance. This is an […]

Use of portable ultrasonography as a nondestructive method for estimating reproductive effort in lizards

Obtaining population-level life history data such as egg and clutch size in reptiles has most often required that individuals be sacrificed. This prevents a reexamination of individuals over intra-annual and inter-annual time scales, limiting insight into the effects of varying environmental conditions on reproductive output. Here, we test the use of a laptop-sized portable ultrasound […]