TY - JOUR
T1 - Hidden costs to an invasive intraguild predator from chemically defended native prey
AU - Sloggett, John J.
AU - Haynes, Kenneth F.
AU - Obrycki, John J.
PY - 2009/9
Y1 - 2009/9
N2 - Studies of invasive species tend to concentrate on the reasons for their success, rather than on the potential costs that they face. Invasive predators are potentially vulnerable to chemical defences of native prey that they have not previously encountered, and evolved to tolerate, within their natural range. While novel chemical defences have been cited as a factor facilitating invasion by exotic prey, the potential costs of chemical novelty to invasive predators have been ignored or remained hidden. We here consider one such example. Although a dominant intraguild predator in interactions with native ladybird beetles, the invasive ladybird Harmonia axyridis finds the defensive alkaloids of certain native ladybirds either distasteful or toxic, although laboratory and field evidence suggests it readily attacks these prey; these natives appear to possess novel alkaloids not previously encountered by H. axyridis. This effect has hitherto remained hidden, due to the methodological approaches used in earlier studies.
AB - Studies of invasive species tend to concentrate on the reasons for their success, rather than on the potential costs that they face. Invasive predators are potentially vulnerable to chemical defences of native prey that they have not previously encountered, and evolved to tolerate, within their natural range. While novel chemical defences have been cited as a factor facilitating invasion by exotic prey, the potential costs of chemical novelty to invasive predators have been ignored or remained hidden. We here consider one such example. Although a dominant intraguild predator in interactions with native ladybird beetles, the invasive ladybird Harmonia axyridis finds the defensive alkaloids of certain native ladybirds either distasteful or toxic, although laboratory and field evidence suggests it readily attacks these prey; these natives appear to possess novel alkaloids not previously encountered by H. axyridis. This effect has hitherto remained hidden, due to the methodological approaches used in earlier studies.
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U2 - 10.1111/j.1600-0706.2009.17407.x
DO - 10.1111/j.1600-0706.2009.17407.x
M3 - Article
AN - SCOPUS:69549133643
SN - 0030-1299
VL - 118
SP - 1396
EP - 1404
JO - Oikos
JF - Oikos
IS - 9
ER -