| 单词 | allopatric |
| 释义 | BETA Examples ofallopatricDictionary> Examples ofallopatric allopatricisn’t in the Cambridge Dictionary yet. You can help! Add a definition The question of howallopatricspecies might be defined is discussed in the final section of this paper. From theCambridge English Corpus Taken together, these findings provide evidence of differentiation among existingallopatricpopulations. From theCambridge English Corpus Comparisons ofallopatricarctic char populations with those occurring sympatrically with other salmonids indicate that interactive feeding segregation exerts a strong influence on parasite transmission. From theCambridge English Corpus The current single centre to the distribution of all the metacentrics can be presumed to have been the location of theallopatricpopulation. From theCambridge English Corpus Such dependence could easily exist if parasites saturate the susceptible pool ofallopatrichosts, but at a higher dose than for sympatric hosts. From theCambridge English Corpus What are the relative genetic differences between the sympatric andallopatricpairings? From theCambridge English Corpus The difference in dose-response curves indicates that compatible combinations are very rare inallopatrichost-parasite combinations in this system. From theCambridge English Corpus However, there was no indication of a threshold in theallopatrichosts and the proportion of uninfected sympatric hosts remained unchanged even at extreme doses. From theCambridge English Corpus This finding suggests that theallopatrichost population might have unique ' resistance ' genotypes. From theCambridge English Corpus This is the first experiment of which we are aware that estimates dose-prevalence functions for both a sympatric andallopatriccombination in any host-parasite system. From theCambridge English Corpus The results also suggest, contrary to our expectation, that compatible genetic combinations were very rare in theallopatrichost population. From theCambridge English Corpus One of the host populations was sympatric, and the other host population wasallopatric, to the parasite population. From theCambridge English Corpus Host addition is characterized byallopatricdistributions of the host taxa. From theCambridge English Corpus Allopatriccombinations are in bold. From theCambridge English Corpus These results suggest that defences in theallopatrichost were not overwhelmed at high parasite doses, and that any life-history costs of defence are not plastic responses to parasite dose. From theCambridge English Corpus In summary, we found that for a sympatric host-parasite combination infection increased rapidly with parasite dose whereas in theallopatriccombination infection increased very little with dose. From theCambridge English Corpus First, each population could have been exposed to different external environments with different selection pressures, leading toallopatricspeciation in the manner proposed in standard evolutionary theory. From theCambridge English Corpus We found that sympatric hosts rapidly developed a clear asymptotic exposure-prevalence relationship, whileallopatrichosts failed to develop such a relationship, even though experimental infections were produced. From theCambridge English Corpus They further demonstrated that whilst there is a tendency for sympatric combinations to be more compatible thanallopatriccombinations, instances of the reverse pattern also occur. From theCambridge English Corpus Hence, locally adapted parasites might be expected to infect the common genotypes at relatively low doses in sympatric hosts, but reach the same asymptote inallopatrichosts at higher doses. From theCambridge English Corpus These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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