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- W1526414923 abstract "ABSTRACT In order to understand the adaptive processes of an estuarine organism under stress from a pollutant, the behavior of the crab Hemigrapsus oregonensis was assessed with and without exposure to polychlorinated biphenls (PCB's). Activities budgets were developed from observations of the time crabs spent in 20 categories of shelter use, posture, and activity while held in habitat models complete with tides. Females spent more time sheltered and feeding but less time displaying than males. For both sexes certain activities predominated at certain tidal stages. Multivariate discriminant analysis was used to explore differences in activities budgets between ordinary conditions and stressing conditions when PCB-contaminated sand was present. Discriminant functions containing all 20 activities did not clearly distinguish the budgets of stressed and unstressed crabs. Stepwise discriminant analyses, used to choose the most parsimonious functions, indicated where the budgets differed. For both sexes and different trials, feeding consistently appeared in the multivariate discriminant functions and decreased under PCB exposure. The discriminant analysis suggested that the consequences one would predict for a pollutant-induced stress are functions of the paradigm under which one observes. In a search to predict the consequences of pollution one should be alert not only to the character of the organism's failures, but also to the nature of its successes." @default.
- W1526414923 created "2016-06-24" @default.
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- W1526414923 date "1976-01-01" @default.
- W1526414923 modified "2023-09-27" @default.
- W1526414923 title "PCB AND THE ACTIVITIES BUDGET OF THE CRAB HEMIGRAPSUS OREGONENSIS" @default.
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- W1526414923 doi "https://doi.org/10.1016/b978-0-12-751801-5.50033-2" @default.
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