Role of species diversity and secondary compound complementarity on diet selection of Mediterranean shrubs by goats

Journal of Chemical Ecology
J RogosicStanislava Maric

Abstract

Goats foraging on Mediterranean shrubs containing secondary compounds (toxins) may consume a variety of shrubs that contain different phytotoxins, thereby increasing shrub intake and avoiding toxicosis. We conducted eight experiments to examine whether goats offered different mixtures of shrubs containing different phytotoxins (tannins and saponins) would consume more shrub biomass than goats offered one shrub a single phytotoxin (tannin or saponin). In the first three experiments, goats fed a mixture of three tannin-rich shrubs (Quercus ilex, Arbutus unedo, and Pistacia lentiscus) ate more foliage than goats offered only one shrub (23.2 vs. 10.7 g/kg BW; 25.2 vs. 13.4 g/kg BW, and 27.9 vs. 7.9 g/kg BW), regardless of tannin concentration in individual shrub species. Goats also consumed more foliage when offered the same three tannin-rich shrubs than when offered the saponin-rich shrub Hedera helix (25.4 vs. 8.0 g/kg BW). However, goats offered a mixture of the same three tannin-rich shrubs consumed less foliage than goats offered a mixture of two shrubs containing tannins and saponins: Quercus and Hedera (21.6 vs. 27.1 g/kg BW), Arbutus and Hedera (21.8 vs. 27.1 g/kg BW), and Pistacia and Hedera (19.7 vs. 22.0 g/kg BW). Compar...Continue Reading

References

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Citations

Jun 14, 2006·Journal of Chemical Ecology·Karen J MarshWilliam J Foley
Mar 24, 2012·Animal : an International Journal of Animal Bioscience·M MelladoJ Mellado
Mar 29, 2011·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Elsa LamyElvira Sales-Baptista

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