Spartan Daily, April 18, 2002

Volume 118, Issue 53https://scholarworks.sjsu.edu/spartandaily/10625/thumbnail.jp

Egg Turning Behavior and Egg Temperature in Relation to Mercury Contamination of Forster\u27s Terns (Sterna forsteri)

Several avian species exhibit reduced hatching success as a result of mercury contamination, but the mechanism by which this occurs is unknown. We examined egg turning rates and egg temperatures, two important determinants of egg hatchability, in relation to egg mercury contamination of Forster’s terns (Sterna forsteri) in San Francisco Bay. Here, we used artificial eggs containing a data logger with a 3-D accelerometer, a magnetometer, and a temperature thermistor to monitor parental incubation behavior (sampled at 1 Hz) of 186 tern nests. Overall, adults turned their eggs an average of 3.8 ± 0.8 SD turns h^(-1), which is nearly two times higher than that of other seabirds. Egg turning rates also increased with nest initiation date. Changes about the yaw axis (side-to-side egg movements) were the most prominent aspect of egg turning (224 ± 4.7 degrees h^(-1)), though roll and pitch (up-and-down movements) also showed substantial changes (149 ± 2.5 degrees h^(-1) and 89 ± 1.1 degrees h^(-1), respectively). Despite the high variability in egg turning rates among individuals (SD = 0.8 turns h^(-1)), the rate of turning was not correlated with mercury concentrations in surrogate eggs collected from the same nest. Our results indicate that egg turning rates in Forster’s terns are high, but unrelated to mercury contamination

Independent- Sep. 9, 2003

https://neiudc.neiu.edu/independent/1293/thumbnail.jp

November 24, 2003

The Breeze is the student newspaper of James Madison University in Harrisonburg, Virginia

The economic value of natural resources around the Kgalagadi Transfrontier Park and implications for the Khomani San in South Africa

Includes abstract.Includes bibliographical references.The term ‘bushmen’ is used generically to refer to the Khoisan. Although the term is still used in several countries in the Southern African region (SADC), it is considered derogatory by some. Culturally the Khoisan are divided into the hunter-gatherer San (originally a derogatory term used by the Khoi), and the pastoral Khoi (Barnard, 1992). Anthropologists from the West adopted the term ‘San’ extensively in the 1970’s, and this is now the preferred term in academic circles. This is a study in economic anthropology which seeks to fully understand the complexity of the economics of a hunter gatherer people in the Kgalagadi area. Despite the change in the lifestyle and values of the San people, they have and continue to provide valuable information in the fields of anthropology and genetics (see Thomas, 1958, 1989, 2006; Lee, 1976, 1979; Barnard, 1992; Hogan, 2008)

Physiological and psychological factors related to selected food choices : five case studies

The purpose of the study was to investigate the interrelationship between foods selected and consumed and the behavior exhibited by five preschool children. These children were enrolled in the Nursery School (School of Home Economics) at the University of North Carolina at Greensboro during the spring semester. For a period of twenty consecutive days the twenty-four children enrolled in the nursery school selected their food for the noon meal cafeteria style. Each child entered the room for lunch in random order and selected his food from twenty-four foods which had been randomly placed, by groups, on a serving table. The groups were meat and meat substitutes, vegetables, finger foods, and desserts, with bread also being offered, and milk already at each child's place. The food, when selected by the child, was served to him in a predetermined amount by trained adults. The predetermined "serving" of food was most frequently one tablespoon and was weighed each day prior to the noon meal to the nearest tenth of a gram. Each day the same nursery school teacher or a graduate student sat with the children at a regularly assigned place at one of five tables. The adult did not eat so could accurately check the number of servings of the specific foods each child selected. The teacher or graduate student neither encouraged or discouraged the child to eat

The Spinnaker Vol. 29 No. 26

Student newspaper for the UNF community