EFFECTS OF BODY SIZE, MEAL SIZE, AND TEMPERATURE ON THE SPECIFIC DYNAMIC ACTION OF THE TOAD, BUFO MARINUS.Zoology and Entomology entomology, study of insects, an arthropod class that comprises about 900,000 known species, representing about three fourths of all the classified animal species. EFFECTS OF BODY SIZE, MEAL SIZE, AND TEMPERATURE ON THE SPECIFIC DYNAMIC ACTION OF THE TOAD, BUFO MARINUS Angela [Faulkner.sup.*] and Stephen Secor, University of Mississippi The University of Mississippi, also known as Ole Miss, is a public, coeducational research university located in Oxford, Mississippi. Founded in 1848, the school is composed of the main campus in Oxford and three branch campuses located in Booneville, Tupelo, and Southaven. , University, MS 38677 The increased metabolic rate associated with feeding, digestion, and assimilation of nutrients is termed Specific Dynamic Action (SDA SDA abbr. specific dynamic action Serotonin dopamine antagonist (SDA) The newer second-generation antipsychotic drugs, also called atypical antipsychotics. ). SDA involves increases in metabolic rate ranging from 50% for humans to 4400% for pythons. Previous studies investigated individually the effects of body size, relative meal size, and body temperature on SDA. The objective of this study is to determine how these variables influence the magnitude and duration of the SDA response for a single species, the marine toad Bufo marinus. Following the consumption of meals equal to 5%, 10%, and 15% of body mass, toads responded with increases in oxygen consumption rates on the order of 200%, 300%, and 400%, respectively, at a body temperature of 30[degrees]C. SDA increased with meal size and equaled 14--18% of ingested in·gest tr.v. in·gest·ed, in·gest·ing, in·gests 1. To take into the body by the mouth for digestion or absorption. See Synonyms at eat. 2. meal energy. At a body temperature of 20[degrees]C, toads responded to the digestion of a meal 10% of body mass with a 250% increase in metabolic rate. The duration of the SDA response at 20[degrees]C was almost twice the duration experienced at 30[degrees]C. SDA increase linearly with body size, exhibiting an allometric al·lom·e·try n. The study of the change in proportion of various parts of an organism as a consequence of growth. al exponent of slightly great than 1.0 |
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