1. We investigate the potential effects of parasitoid
egg limitation on host-parasitoid population dynamics. We define a
parasitoid as egg-limited if a shortage of eggs means that at some
time she cannot utilize an opportunity to oviposit. 2. We develop
models which consider the differing physiologies of pro-ovigenic and
synovigenic parasitoids to investigate the potential consequences of egg
limitation. Pro-ovigenic parasitoids emerge with their full complement of
mature eggs. Synovigenic parasitoids also emerge with some eggs,
but can mature more later in life. 3. The models indicate that egg
limitation in pro-ovigenic parasitoids has no effect on stability. This
result is independent of the egg load distribution in newly emerged
parasitoids, and of the maximum number of eggs with which a female
emerges. In synovigenic models, however, egg limitation is found to
be destabilizing, though the reduction in stability is decreased
by (i) an increase in egg load at emergence, and (ii) a decrease
in the 'latent' time required for egg maturation and gut emptying
following a host meal. The latent period, during which time the full gut
precludes feeding on hosts, differs from a conventional handling time
in that host attacks (via oviposition) are still possible if the
female has mature eggs. The maximum ovary storage capacity of females
in a synovigenic parasitoid population has no effect on stability.
%0 Journal Article
%1 Shea1996
%A Shea, K.
%A Nisbet, R.M.
%A Murdoch, W.W.
%A Yoo, H.J.S
%D 1996
%J Journal of Animal Ecology
%K ER limitation;
%N 6
%P 743-755
%T The effect of egg limitation on stability in insect host-parasitoid population models
%V 65
%X 1. We investigate the potential effects of parasitoid
egg limitation on host-parasitoid population dynamics. We define a
parasitoid as egg-limited if a shortage of eggs means that at some
time she cannot utilize an opportunity to oviposit. 2. We develop
models which consider the differing physiologies of pro-ovigenic and
synovigenic parasitoids to investigate the potential consequences of egg
limitation. Pro-ovigenic parasitoids emerge with their full complement of
mature eggs. Synovigenic parasitoids also emerge with some eggs,
but can mature more later in life. 3. The models indicate that egg
limitation in pro-ovigenic parasitoids has no effect on stability. This
result is independent of the egg load distribution in newly emerged
parasitoids, and of the maximum number of eggs with which a female
emerges. In synovigenic models, however, egg limitation is found to
be destabilizing, though the reduction in stability is decreased
by (i) an increase in egg load at emergence, and (ii) a decrease
in the 'latent' time required for egg maturation and gut emptying
following a host meal. The latent period, during which time the full gut
precludes feeding on hosts, differs from a conventional handling time
in that host attacks (via oviposition) are still possible if the
female has mature eggs. The maximum ovary storage capacity of females
in a synovigenic parasitoid population has no effect on stability.
@article{Shea1996,
abstract = {1. We investigate the potential effects of parasitoid
egg limitation on host-parasitoid population dynamics. We define a
parasitoid as egg-limited if a shortage of eggs means that at some
time she cannot utilize an opportunity to oviposit. 2. We develop
models which consider the differing physiologies of pro-ovigenic and
synovigenic parasitoids to investigate the potential consequences of egg
limitation. Pro-ovigenic parasitoids emerge with their full complement of
mature eggs. Synovigenic parasitoids also emerge with some eggs,
but can mature more later in life. 3. The models indicate that egg
limitation in pro-ovigenic parasitoids has no effect on stability. This
result is independent of the egg load distribution in newly emerged
parasitoids, and of the maximum number of eggs with which a female
emerges. In synovigenic models, however, egg limitation is found to
be destabilizing, though the reduction in stability is decreased
by (i) an increase in egg load at emergence, and (ii) a decrease
in the 'latent' time required for egg maturation and gut emptying
following a host meal. The latent period, during which time the full gut
precludes feeding on hosts, differs from a conventional handling time
in that host attacks (via oviposition) are still possible if the
female has mature eggs. The maximum ovary storage capacity of females
in a synovigenic parasitoid population has no effect on stability.},
added-at = {2009-12-02T17:49:46.000+0100},
author = {Shea, K. and Nisbet, R.M. and Murdoch, W.W. and Yoo, H.J.S},
biburl = {https://www.bibsonomy.org/bibtex/260e8966f68244c95c817388e4835d55a/embeh},
interhash = {d854acd87d168d6894a1c95affc635a6},
intrahash = {60e8966f68244c95c817388e4835d55a},
journal = {Journal of Animal Ecology},
keywords = {ER limitation;},
number = 6,
owner = {oliver},
pages = {743-755},
timestamp = {2009-12-02T17:50:18.000+0100},
title = {The effect of egg limitation on stability in insect host-parasitoid population models},
volume = 65,
year = 1996
}