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| Genaro,G.; Schmidek,W.R.; Franci,C.R.. |
| Studies of behavior, endocrinology and physiology have described experiments in which animals housed in groups or in isolation were normally tested individually. The isolation of the animal from its group for testing is perhaps the most common situation used today in experimental procedures, i.e., there is no consideration of the acute stress which occurs when the animal is submitted to a situation different from that it is normally accustomed to, i.e., group living. In the present study, we used 90 male 120-day-old rats (Rattus norvegicus) divided into 5 groups of 18 animals, which were housed 3 per cage, in a total of 6 cages. The animals were tested individually or with their groups for exploratory behavior. Hormones were determined by radioimmunoassay... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Isolation; Group; Stress; Reproduction; ACTH; Luteinizing hormone; Corticosterone; Prolactin. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000600008 |
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| Lohman, Greta; Keske, Catherine M.; Loomis, John B.. |
| Dichotomous choice willingness to pay questions are often used to determine the value visitors place on nature-based recreation. Ambiguity in wording can result in the use of information that does not necessarily reflect visitors’ true WTP. For example, depending on the specificity of the verbiage used, respondents may answer questions on a group basis, rather than an individual basis. To address this issue, experimental surveys were distributed with questions that specifically asked WTP on a per person basis, as compared to control surveys in which the WTP question was more generally worded. Analyses show WTP responses for either survey type are statistically different, with non-overlapping confidence intervals. Furthermore, approaches were conducted... |
| Tipo: Thesis or Dissertation |
Palavras-chave: Dichotomous choice; Willingness to pay; Verbiage; Language; Wording; Group; Individual; Community/Rural/Urban Development; Demand and Price Analysis; Environmental Economics and Policy; Land Economics/Use; Public Economics; Research Methods/ Statistical Methods. |
| Ano: 2010 |
URL: http://purl.umn.edu/60679 |
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