caa a22 4500 386361452 CHVBK 20180307111916.0 cr unu---uuuuu 161130e198909 xx s 000 0 eng 10.4039/Ent121821-9 doi S0008347X00035720 pii (NATIONALLICENCE)cambridge-10.4039/Ent121821-9 EFFECTS OF CROWDING ON SUPLHURETYLENCHUS SPP. (NEMATODA: ALLANTONEMATIDAE) IN THE HAEMOCOEL OF THEIR BARK BEETLE HOSTS (COLEOPTERA: SCOLYTIDAE) [Elektronische Daten] Nematode parasites of bark beetles are taxonomically diverse, and may, in some cases, cause serious pathological and behavioural changes in their hosts (Kaya 1984). Their potential as biological control agents has long been recognized, but to date there is a shortage of elementary information on host-parasite interactions. Though the effects of superparasitism and subsequent crowding on the parasite have been studied for some mermithids (Petersen 1972) and steinernematids (Sandner and Stanuszek 1971), no such observations have been reported for bark beetle parasites. During a survey of nematode parasites of bark beetles in Manitoba, we encountered two examples where nematodes were detrimentally affected at the higher infection rates observed. It was our objective, therefore, to examine the relationship between intensity of infection, and impact on growth and reproduction of the parasites. Copyright © Entomological Society of Canada 1989 Tomalak Marek Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2 Welch Harold E. Department of Zoology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2 Galloway Terry D. Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2 The Canadian Entomologist Cambridge University Press 121/9(1989-09), 821-822 0008-347X 121:9<821 1989 121 TCE https://doi.org/10.4039/Ent121821-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.4039/Ent121821-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tomalak Marek Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2 NATIONALLICENCE 700 1- Welch Harold E. Department of Zoology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2 NATIONALLICENCE 700 1- Galloway Terry D. Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2 NATIONALLICENCE 773 0- The Canadian Entomologist Cambridge University Press 121/9(1989-09), 821-822 0008-347X 121:9<821 1989 121 TCE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge