Cannibalism and interspecific predation in the phytoseiid mites Phytoseiulus persimilis and Neoseiulus californicus

Author(s)
A Walzer, P Schausberger
Abstract

We examined intra- and interspecific predation of adult females and immature stages of the generalist Neoseiulus californicus and the specialist Phytoseiulus persimilis. Adult females and immatures of both predators exhibited higher predation rates on larvae than on eggs and protonymphs. N. californicus fed more inter- than intraspecifically. Predation on P. persimilis by N. californicus was more severe than vice versa. P. persimilis had higher predation rates on conspecifics than heterospecifics and was more prone to cannibalism than N. californicus. When provided with phytoseiid prey, P. persimilis suffered higher mortality than N. californicus. When held without food, adult females and protonymphs of N. californicus survived longer than the corresponding stages of P. persimilis. N. californicus females were able to sustain oviposition when preying upon P. persimilis, whereas cannibalizing females did not lay eggs. Females of P. persimilis were not able to sustain oviposition, irrespective of con- or heterospecific prey. Immatures of both predators were able to reach adulthood when provided with either con- or heterospecifics. Juvenile development of N. californicus was shorter with heterospecific vs. conspecific larvae; mortality of P. persimilis immatures was less when feeding on conspecific vs. heterospecific larvae. Different behavioral pattern in intra- and interspecific predation are discussed in regard to their feeding types (generalist vs. specialist).

Organisation(s)
External organisation(s)
Universität für Bodenkultur Wien
Journal
BioControl: journal of the International Organization for Biological Control
Volume
43
Pages
457-468
No. of pages
12
ISSN
1386-6141
Publication date
1999
Peer reviewed
Yes
Austrian Fields of Science 2012
106047 Animal ecology
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/cannibalism-and-interspecific-predation-in-the-phytoseiid-mites-phytoseiulus-persimilis-and-neoseiulus-californicus(bf527e9c-5983-4dca-be78-188f15c55e42).html