1(between groups, individuals)cruzarse
- It is part of a complex of closely related gull species that interbreed readily.
- If this process goes on long enough, parent and daughter species can no longer interbreed, and there results a new species.
- This helps explain why the success of hybrids is so variable and also why some species can, and others cannot, interbreed.
- He said that two organisms belonged to the same species if they are able to interbreed and produce fertile offspring.
- The populations in the various parts of the world ocean are all genetically separate subspecies and, while they may co-mingle in breeding grounds, they rarely if ever interbreed.
- The rats offer several advantages to researchers: the rodents are a distinct species from later European stowaways, and therefore did not interbreed.
- Although the territories of populations overlap, they do not interbreed.
- Non-indigenous rainbow interbreeds and competes with native species, and brown trout are threatened as a result.
- Organisms from distinct but closely related species may be able to interbreed.
- Because they are free to interbreed, the wild stock is of more or less mixed origin.
- The biological definition of a species states that if two races interbreed they belong in the same species.
- As a result, the fly provides the first evidence that two different animal species can interbreed and evolve into a new, distinct animal if their hybrid moves to a new habitat, the study suggests.
- If both types inhabit the same place in the field, they usually interbreed.
- When the three species come into contact, they defend territories from one another and do not interbreed.
- He says pet rabbits have a habit of digging their way to freedom, especially if kept outside in a garden, and that they often interbreed with native populations.
- These wild oxen appear to have made no detectable contribution to the domestic gene pool; they did not interbreed with their domestic contemporaries.
- Farmed fish regularly and in increasing numbers escape into the wild where they interbreed, spread diseases to native species and dilute the natural gene pool.
- There are 54 to 58 species of Motacillidae, some of which interbreed.
- These races can interbreed but they never produce halfbreeds.
- With closely related animals that can interbreed, it's not unusual for the dominant species to absorb the other, Trinkaus says.
2(within group)reproducirse entre sí
- And though there are no discernible physical barriers to prevent intermingling or interbreeding, I have never seen mixed herds or any individual that looks like an intermediate form, or hybrid.
- 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.
- Theories have ranged from interspecies genocide to interbreeding to humans' superior communication skills, hunting technology, and social organization.
- Alan Templeton, a geneticist at Washington University in St. Louis who headed the study reported in Nature, has concluded that yes, there was interbreeding between the different groups.
- Wild Atlantic salmon stocks will be wiped out within decades because of interbreeding with escaped farmed stocks, leading scientists have warned.
- But taxonomists rarely actually test interbreeding with live animals or plants to see if they could actually produce healthy, fertile offspring.
- Genetic barriers to interbreeding in closely related birds are few, and fertile hybrid crosses are known between members of different genera that have presumably been separate for millions of years.
- Since their arrival in Africa, Indian cattle genes have thrived and through interbreeding, have spread throughout the continent.
- Reproductive isolation - not interbreeding with either of the parent species - is one requirement for a species.
- New scientific information from the U.S. Fish and Wildlife Service suggests the spotted owl is not entirely dependent on old-growth forest for habitat and faces a significant threat from interbreeding with the barred owl.
- The Government agreed to wipe out the UK's ruddy duck population after it was found the north American duck was challenging the survival of the globally-threatened white-headed duck through interbreeding.
- These differences in color are sufficient to prevent interbreeding among existing species.
- 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.