The postprandial thermal and metabolic responses (the specific dynamic action) are physiological traits phylogenetically conserved among vertebrates (refs. 1, 2). Their behavioral counterpart is a sequence of drinking, maintenance and sleep-like behaviors (known as the Behavioral Satiety Sequence, BSS) that have been thoroughly described in rodents, and allowed for refined evaluation of potential appetite suppressants (refs. 3, 4). However, BSS presence and attributes have not been systematically studied in non-mammalian species. Here, we describe the BSS in pigeons (Columba livia, adults, 340-400 g bw, N=6,) after 1) a palatable seed mixture (SM) offered to free-feeding (FF-SM) animals; 2) re-feeding after a 24-h food-deprivation (24FD), 3) brief (1-hour) removal of food and water, followed by palatable food presentation (the “seed mixture-induced BSS” or SM-BSS test). Behaviors were examined by continuous recording during 2 h after the meal. A set of graphic representations and indexes related to the temporal structure and the sequential relationships between these behaviors (latency for the 1st occurrence, time-to-peak (TTP) of each behavior, inter-peak interval (IPI) and the first intersection (ItS) between feeding curves and those of other BSS-typical behaviors). These indexes were used to describe changes in the SM-BSS evoked by retesting (3 times, 7-days apart), by gender, by different degrees of food preload (0, 33, 66 or 100 % of their mean intake in 3 preceding tests), by removing water during the test or by changing the palatability of the food offered (Regular chow vs. SM food vs. quinine-adulterated SM. Fasting- and SM-induced feeding were followed by a temporally similar sequence of increased bouts of drinking, then preening and then sleep, which can be integrally observed within 90 min after food presentation. The latency, TTP, IPI and ItS indexes were able to detect, describe and quantitatively assess BSS the temporal and sequential parameters of the BSS. The SM-BSS test indexes were not affected by retesting, by gender or by the absence of water during the test. Despite of significant differences in food intake, the temporal and sequential indexes of the BSS in SM-BSS test, in 24FD animals, after different preloads or foods of varying palatability were similar, suggesting that BSS is triggered by preabsortive signals (all food eaten is still in the crop 90 min after the test start), but its sequential and temporal patterns are not modulated by the meal size. These results diverge from those observed in rodents and primates, indicating that, beyond general behavioral similarities, BSS may be directed by distinct central mechanisms in birds and mammals.
37th Congress of IUPS (Birmingham, UK) (2013) Proc 37th IUPS, PCB319
Poster Communications: The behavioral satiety sequence in pigeons (Columba livia): description and calibration of a test protocol
W. A. Spudeit1, N. S. Sulzbach1, M. A. Bittencourt1, A. C. Andrade1, A. M. Duarte1, M. P. Cantarelli1, G. I. Hunning1, T. S. dos Santos1, C. Lino-de-Oliveira1, J. Marino-Neto1,2
1. Depto. de CiÛncias Fisiol¾gicas - CCB, Universidade Federal de Santa Catarina, Florian¾polis, Santa Catarina, Brazil. 2. Instituto de Engenharia BiomÚdica, EEL-CTC, Universidade Federal de Santa Catarina, Florian¾polis, Santa Catarina, Brazil.
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