| Morphological species are important in palaeontology, for interbreeding ability does not fossilize. |
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| Since their arrival in Africa, Indian cattle genes have thrived and through interbreeding, have spread throughout the continent. |
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| Wild Atlantic salmon stocks will be wiped out within decades because of interbreeding with escaped farmed stocks, leading scientists have warned. |
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| But taxonomists rarely actually test interbreeding with live animals or plants to see if they could actually produce healthy, fertile offspring. |
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| They believed themselves descended from demigods whose divinity had degraded through centuries of interbreeding with lesser races. |
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| Descended from German sheep dogs and cattle dogs, this large variety of Schnauzer was evolved through interbreeding with the smaller Schnauzers. |
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| Paabo has shown there was interbreeding between, at the present count, four distinct lines of hominin. |
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| Was there any interbreeding with Neanderthals as modern humans moved into Europe? |
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| The ruddy duck, a native of North America, is now interbreeding with its close relative. |
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| These differences in color are sufficient to prevent interbreeding among existing species. |
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| Some herpetologists thought those results suggested the likelihood of interbreeding among local populations of the same species. |
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| Given this, there is good reason to believe that intraspecific interbreeding would occur as well. |
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| In his talk, however, Pääbo zeroed in on one issue: interbreeding between Neandertals and modern humans. |
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| At the same time, interbreeding between the whites, Khoekhoe, and slaves produced the ethnically mixed Cape Coloured people. |
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| These farmed fish often escape, and some biologists suggest that interbreeding with the native species may in fact destroy the native stocks. |
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| The researchers suspect that the physical and genetic changes between the two groups may be preventing the birds from interbreeding. |
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| Species: a group of organisms capable of interbreeding and producing fertile offspring. |
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| We also learn that it was nearly lost at one point through interbreeding and casualties in war. |
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| Despite the presence of a pericentric inversion of chromosome 2, fertile offspring are produced by interbreeding of the different subspecies in captive conditions. |
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| The human race and their technologically able allies moved forth into the galaxy and dispersed, creating new worlds, and through interbreeding, new subspecies of races. |
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| Theories have ranged from interspecies genocide to interbreeding to humans' superior communication skills, hunting technology, and social organization. |
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| These markers will be used to estimate interbreeding between field populations of the two developmental morphs to assess whether there is any evidence of speciation. |
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| In addition, interactions between wild and farmed species, such as competition for food and habitat, interbreeding and introduction of disease and parasites, continue to be cause for concern. |
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| Since these birds share the same breeding range, where genetic mixing is possible, the study has scientists discussing how reproductive isolating mechanisms must have evolved to stop the birds from interbreeding. |
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| The challenge is to identify which habitat attributes are most important to keep the species pair from interbreeding to the extent that the survival of the pair is not jeopardized. |
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| Farmers using traditional methods will tend to undertake such base-broadening activities through interbreeding new improved varieties with their own local crops. |
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| The Cultural Space of the Garifuna, submitted by Belize and supported by Honduras and Nicaragua, which comprises the language and culture of this community born of the interbreeding characteristic of the region. |
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| The extensive intergradation that has resulted from interbreeding is the chief cause of classification difficulties. |
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| Genetic results from a pilot study in 2005 indicated that previous escape events had occurred but there was little evidence of interbreeding between the escapes and naturalized or domestic fish stocks. |
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| The greatest population of wildcats lives in Spain and Portugal but is threatened by interbreeding with feral cats and loss of habitat. |
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| Biological containment options for finfish and shellfish have been identified and developed as methods to limit the impact of these novel aquatic animals on aquatic ecosystems, by preventing interbreeding with wild strains. |
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| Humans and chimpanzees were interbreeding for all this time, before finally separating no more than 6.3m years ago and probably less than 5.4m years ago. |
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| Moreover, the argument that the two species were interbreeding over such a long time is, to say the least, controversial. Most interesting was what the scientists discovered about the X chromosome in humans and chimpanzees. |
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| Currently the only published information regarding the interaction or interbreeding between hatchery-produced and wild fish is interspecific introgression between hybrid Morone and pure striped bass. |
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| Research should be carried out on the effects of fish farms on wild stocks, in particular relating to disease and interbreeding, special attention being paid to the effects on tourism in rural areas based in angling. |
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| This led to homogamy, or the interbreeding of persons with similar characteristics. |
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| This lends weight to the theory that a viable hybrid population was sustained by interbreeding over a long time. Further evidence could come from the fossil record. |
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| At the end of the Second World War, the Golden Guernsey had almost been rendered extinct due to interbreeding on the island. |
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| A genetic species as defined by Robert Baker and Robert Bradley is a set of genetically isolated interbreeding populations. |
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| The scarcity of the pure wild species is partly due to interbreeding with feral birds. |
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| However, an analysis of a first draft of the Neanderthal genome by the same team released in May 2010 indicates interbreeding may have occurred. |
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| A very limited amount of interbreeding could explain the findings, if it occurred early enough in the colonization process. |
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| The key idea is that there would have to have been some additional interbreeding events involving East Asians, but not Europeans. |
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| These interbreeding events could have been directly between Neanderthals and East Asians, maybe in some other indirect way. |
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| However, some researchers have argued that there is evidence of possible interbreeding between female Neanderthals and male modern humans. |
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| Barbary falcons breed at different times of year than neighboring peregrine falcon subspecies, but they are capable of interbreeding. |
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| Various methods of reproductive control have and are continuing to be developed to avoid interbreeding between aquaculture and wild fish populations that may have a negative impact on the wild fish. |
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| It appears that Foxe Basin has an interbreeding population that separates into groups with different feeding patterns and with different chances of being hunted at different communities. |
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| In practice, controversy is generally about specific periods and specific proposals for periods of such interbreeding, in addition to whether such interbreeding took place. |
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| Hawks has argued that the genetic similarity to Neanderthals may indeed be the result of both structure and interbreeding, as opposed to just one or the other. |
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| Interbreeding between tern species is rare, and involves closely related species when it occurs. |
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| Interbreeding can only account for a certain degree of Neanderthal population decrease. |
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| Interbreeding can swamp the rarer gene pool and create hybrids, depleting the purebred gene pool. |
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