caa a22 4500 397571461 CHVBK 20180308164842.0 cr unu---uuuuu 161202e19961001xx s 000 0 eng 10.1093/ee/25.5.1101 doi (NATIONALLICENCE)oxford-10.1093/ee/25.5.1101 Intra- and Interspecific Competition Among Two Parasitoids of the Rice Weevil (Coleoptera: Curculionidae) [Elektronische Daten] [Mun Il Ryoo, Tae Joong Yoon, Sang Soo Shin] We studied intra- and interspecific competition among 2 parasitoids [Anisopteromalus calandrae (Howard) and Lariophagus distinguendus (Förster) (Hymenoptera: Pteromalidae)], which attack the rice weevil, Sitophilus oryZae (L.). As the intraspecific density of the parasitoids increased, the search rate per female and rate of population increase of A. calandrae decreased curvilinearly, suggesting a type of contest-like intraspecific competition. The other parasitoid, L. distinguendus, seemed to exhibit a type of scramble-like intraspecific competition; as long as the number of hosts available was not severely limiting, the search rate and rate of population increase of the parasitoid were not related to the intraspecific density of parasitoids. Statistics estimated for the interspecific competition model suggested that A. calandrae was the dominant competitor and could displace L. distinguendus. However, under conditions of interspecific competition, the 2 species of parasitoids coexisted until the rice weevil population was completely suppressed. This apparent coexistence seemed to be possible because of the differences in the type of intraspecific competition exhibited by the 2 parasitoids. © 1996 Entomological Society of America Population Ecology nationallicence Anisopteromalus calandrae nationallicence Lariophagus distinguendus nationallicence Sitophilus oryzae nationallicence intraspecific competition nationallicence interspecific competition nationallicence coexistence nationallicence Ryoo Mun Il Department of Agricultural Biology, College of Natural Resources, Korea University, Seoul 136-701, Korea aut Yoon Tae Joong Department of Agricultural Biology, College of Natural Resources, Korea University, Seoul 136-701, Korea aut Shin Sang Soo Department of Agricultural Biology, College of Natural Resources, Korea University, Seoul 136-701, Korea aut Environmental Entomology Oxford University Press 25/5(1996-10-01), 1101-1108 0046-225X 25:5<1101 1996 25 ee https://doi.org/10.1093/ee/25.5.1101 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.5.1101 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ryoo Mun Il Department of Agricultural Biology, College of Natural Resources, Korea University, Seoul 136-701, Korea aut NATIONALLICENCE 700 1- Yoon Tae Joong Department of Agricultural Biology, College of Natural Resources, Korea University, Seoul 136-701, Korea aut NATIONALLICENCE 700 1- Shin Sang Soo Department of Agricultural Biology, College of Natural Resources, Korea University, Seoul 136-701, Korea aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/5(1996-10-01), 1101-1108 0046-225X 25:5<1101 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford