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Titolo:
Physiological bases of genetic differences in cannibalism behavior of the confused flour beetle Tribolium confusum
Autore:
Giray, T; Luyten, YA; MacPherson, M; Stevens, L;
Indirizzi:
Univ Vermont, Dept Biol, Burlington, VT 05405 USA Univ Vermont BurlingtonVT USA 05405 Dept Biol, Burlington, VT 05405 USA
Titolo Testata:
EVOLUTION
fascicolo: 4, volume: 55, anno: 2001,
pagine: 797 - 806
SICI:
0014-3820(200104)55:4<797:PBOGDI>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
STANDARD METABOLIC-RATE; DIURETIC HORMONE; DROSOPHILA; MASS; EVOLUTION; TICK; KIN;
Keywords:
kin selection; locomotor activity; nutrition; physiology of behavior; respiratory metabolism; water balance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Giray, T Univ Vermont, Dept Biol, Burlington, VT 05405 USA Univ Vermont Burlington VT USA 05405 l, Burlington, VT 05405 USA
Citazione:
T. Giray et al., "Physiological bases of genetic differences in cannibalism behavior of the confused flour beetle Tribolium confusum", EVOLUTION, 55(4), 2001, pp. 797-806

Abstract

Physiological causes of genetic differences in cannibalism were examined to gain a better understanding of constraints on behavior evolution. Cannibalism has complex population level consequences in Tribolium confusum, including dramatic effects on population size. Laboratory strains with low and high cannibalism rates, obtained through inbreeding, have maintained distinct levels of cannibalism for over two decades even in the absence of artificial selection to maintain the differences. Why strains differ in their cannibalism. rates was examined by measuring: (1) the nutritional benefit from cannibalism in both nutritionally good and poor environments, and (2) the possibility that eggs are an important source of water. How strains achieve differences in cannibalism was examined by testing for differences between strains in their ability to find eggs and in their tendency to eat eggs. Beetles from both strains survive equally well in a nutritionally good environment, but they accomplish this in different ways. The low cannibalism strain has high survivorship with and without cannibalism. The high cannibalism strain has low survivorship when not fed eggs and survivorship equivalent to the low cannibalism strain when fed eggs, suggesting it compensates for poor nutritional adaptation by eating eggs. The strains also differ in feeding behavior; beetles from the high cannibalism strain have a higher appetite for eggs. Beetles from the two strains did not differ in locomotor activity, search efficiency, or need for water. The observed behavioral and nutritional differences may contribute to the maintenance of different levels of cannibalism.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 13:44:57