@article {123,
	title = {Contrasting patterns of hybridization in large house spiders (Tegenaria atrica group, Agelenidae)},
	journal = {Evolution},
	volume = {61},
	year = {2007},
	note = {ZOOR14401000464},
	month = {2007},
	pages = {1622-1640},
	abstract = {The integrity of species is not fixed and may vary geographically. Here we investigate the geographic distributions and interactions of species in the Tegenaria atrica group (Araneae: Agelenidae). Detailed mapping of T. saeva and T. gigantea in England and Wales shows them to be broadly allopatric in southern England with a tightly defined, and possibly long-standing, narrow zone of parapatry in central southern England. In the north of England (Yorkshire), by contrast, the species are broadly sympatric as a result of recent range expansions. GIS techniques are used to map the species distributions and to quantify, we believe for the first time, the intimacy of interspecific interactions. The extent and nature of hybridization in these two areas is examined through regression and multivariate analyses of morphology. We show that the relative incidence of hybridization is much greater in Yorkshire than within the parapatric zone in the south. Clear patterns of asymmetric introgression are observed in both northern and southern England, with a greater impact of T. gigantea on T. saeva than vice versa. We find no sign of morphological reproductive character displacement at the zone of parapatry that might indicate reinforcement, although we cannot exclude more subtle effects, for example via cuticular pheromones. The integrity of these two species seems to be breaking down in northern England, a process that might gain momentum as the gene pools become more similar.},
	keywords = {\& Wales] [Hybridization / / Extent \& nature of hybridization] [Gene, contrasting patterns of hybridization] [England / / ] [Wales / / ]., England, Eurasia, Europe, flow / Introgressive hybridization / Asymmetric introgression between, General morphology, Genetics, implications for species interactions \& hybridization patterns, Land, Palaearctic region, Population genetics, species] [Zoogeography / / Distribution \& species interactions, Tegenaria atrica group (Araneae)., Tegenaria atrica group [General morphology / / Multivariation analyses, United Kingdom, zones, Zoogeography},
	isbn = {0014-3820},
	url = {<Go to ISI>://ZOOREC:ZOOR14401000464},
	author = {Croucher, Peter J. P. and Jones, Ross M. and Searle, Jeremy B. and Oxford, Geoff S.}
}
@article {14,
	title = {Predicting range overlap in two closely related species of spiders},
	journal = {Insect Conservation and Diversity},
	volume = {2},
	year = {2009},
	note = {ZOOR14511070670},
	month = {2009},
	pages = {135-141},
	abstract = {1. Predicting when and where species are likely to experience inter-specific interactions as a result of climate change may be as relevant to understanding their evolutionary futures as predicting responses to physical environmental variables. 2. In this paper, models built using data for the distributions of two species of large house spider, Tegenaria saeva and T. gigantea (Agelenidae), from relatively long-established parts of their ranges are used to predict species overlap in a region of more recent range expansion. 3. Generalised linear models (GLMs) are used to identify the key environmental variables associated with the distributions of the spider species in an east[long dash]west band across central Britain. Using this model, the distributions of the two species both north and south of the central band are predicted and tested for how closely they matched observed distributions, and thus whether environmental factors are a sufficient explanation for current distribution patterns in England and Wales. 4. Results demonstrate that predictions of both species distributions and overlap in the south region are almost as good as in the model-building zone, but that predicted distributions in the north are no better than random. Here either climate is of no importance in determining species distributions or, perhaps more likely, the system is still in a state of flux and currently reflects the stochasticity of recent colonisation. 5. Further long-term monitoring of the populations may allow discrimination between alternative hypotheses that could explain the current mismatch between climate and species{\textquoteright} distributions},
	keywords = {[Climate and weather / Climate change / ] [England / / distribution], [Wales / / ]., Abiotic factors, Eurasia, Europe, Generalised linear models / range overlap of species prediction], Land zones, Palaearctic, Physical factors, region, Techniques, Tegenaria gigantea, Tegenaria gigantea (Araneae)., Tegenaria saeva (Araneae)., Tegenaria saeva [Mathematical techniques /, United Kingdom},
	isbn = {1752-458X},
	url = {<Go to ISI>://ZOOREC:ZOOR14511070670},
	author = {Anderson, Barbara J. and Bai, Yixuan and Thomas, Chris D. and Oxford, Geoff S.}
}
