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Statistical inference for olfactometer data 总被引:1,自引:0,他引:1
I. Ricard A. C. Davison 《Journal of the Royal Statistical Society. Series C, Applied statistics》2007,56(4):479-492
Summary. Olfactometer experiments are used to determine the effect of odours on the behaviour of organisms such as insects or nematodes, and typically result in data comprising many groups of small overdispersed counts. We develop a non-homogeneous Markov chain model for data from olfactometer experiments with parasitoid wasps and discuss a relation with the Dirichlet–multinomial distribution. We consider the asymptotic relative efficiencies of three different observation schemes and give an analysis of data intended to shed light on the effect of previous experience of odours in the wasps. 相似文献
2.
崔明 《山西大同大学学报(社会科学版)》2014,(5):48-50
《印度之行》作为爱德华·摩根·福斯特的最后一部小说,在文学领域中占据重要位置。小说的艺术魅力主要源自它独特的创作技巧,即扩展意象。作品通过小黄蜂和水两种意象物的阐释来揭示当时印度社会环境中不同的民族心理和文化心态所造成的人与人、人与自然及人与社会等问题上的不安与困惑,并以此唤起读者对人生哲学的深沉思索。 相似文献
3.
Motoaki Kinoshita Eiiti Kasuya Tetsukazu Yahara 《Researches on Population Ecology》1998,40(2):239-242
The sex ratio of the pollinator fig wasp,Blastophaga nipponica Grandi (Agaonidae), was examined in an experiment manipulating the number of foundresses. The sex ratio ofB. nipponica was conditional on the number of foundresses and corresponded to the qualitative prediction of the local mate competition
(LMC) theory that the proportion of males increases as foundress number increases. However, the sex ratio ofB. nipponica was consistently more female-biased than predicted by extended LMC theories that incorporated effects of inbreeding, and
these deviations were statistically significant. Plausible factors that would make predictions more female-biased are discussed. 相似文献
4.
Tomoyuki Kameyama Rhett Harrison Norio Yamamura 《Researches on Population Ecology》1999,41(3):243-252
The relationship between fig trees and their pollinator wasps is a well-known example of species-specific obligate mutualism.
In this article we present a stochastic model of this mutualistic system, referring to data on a dioecious fig (Ficus schwarzii) in Borneo, and examine the conditions for the persistence of a wasp population for a given period. (1) When the average
duration of the flowering interval of fig trees is short, even a small fig population can sustain a wasp population successfully.
A population whose average period of flowering cycle is half that of another population can sustain a wasp population with
a number of trees less than half of the other population. (2) The wasp survival rate (WSR) is higher when (a) the variation
of the interval periods of fig flowering is smaller, (b) the fig population size is larger, and (c) figs can prolong their
receptivity to wait for a wasp if no wasps are available. (3) WSR is predictable from the average proportion of the fig's
receptive phases, in which wasps are available, to their total receptive phases. (4) The persistence period of a wasp population
increases exponentially with the number of fig trees. Based on these results we propose a new hypothesis, as a possible scenario,
on the evolution of dioecy from monoecy in Ficus.
Received: November 13, 1998 / Accepted: July 14, 1999 相似文献
5.
Among many stabilizing factors for community dynamics, spatial and temporal heterogeneities have been widely considered in
recent years as two of the most important properties. However, the difference between the two types of heterogeneities have
not been studied, except for Clark and Yoshimura (1993). We evaluated experimentally the effect of temporal and spatial heterogeneities
on the persistence of a biological community. The experimental communities consisted of one parasitic wasp species, one bean
weevil species, and two kinds of bean. Temporal and spatial heterogeneities of experimental communities were generated by
kinds and timing of bean supply. Of all the experimental communities, the most persistent community was a temporally and spatially
homogeneous community with Red Kidney bean as primary resource. Compared to spatially heterogeneous communities, temporally
heterogeneous communities were more persistent. These results were easily explained by considering the attack rate of parasitic
wasps and the difference between arithmetic and geometric means. In order to discuss the relative importance of environmental
heterogeneity and the mode of biological interaction on community persistence, we have to measure the degree of environmental
heterogeneity as the rate of change of the strength of interspecific interactions. 相似文献
6.
Koji Tsuchida 《Researches on Population Ecology》1991,33(2):361-366
Summary Females in hibernation site (FH) were significantly larger than foundresses (FO), suggesting that larger FH were less successful
in founding their nest. Body size of FO did not correlate with two nest characters, i.e., the number of cells at pupal stage
(CP) and the timing of nest foundation (DP). However, CP negatively correlated with DP in 2 of 3 studied years, suggesting
that foundress who founded her nest earlier than others tended to construct larger number of cells irrespective of her body
size. 相似文献
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