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When an ancestral species gives rise to two new species, what determines whether the two new species can reproduce? Consider the mechanisms that restrict gene flow: reproductive isolating mechanisms.

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When an ancestral species gives rise to two new species, what determines whether the two new species can reproduce? Consider the mechanisms that restrict gene flow: reproductive isolating mechanisms.

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Also called Ecological Isolation

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When an ancestral species gives rise to two new species, what determines whether the two new species can reproduce? Consider the mechanisms that restrict gene flow: reproductive isolating mechanisms.

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Of the four geographic modes of speciation in nature, allopatric speciation, where the population of a species splits into two geographically isolated populations, is the most common. In this Buzzle article, we will see how geographic isolation can lead to allopatric speciation, and also put forth some examples of the same.

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Examples That Explain Geographic Isolation in a Simple Manner

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Of the four geographic modes of speciation in nature, allopatric speciation, where the population of a species splits into two geographically isolated populations, is the most common. In this Buzzle article, we will see how geographic isolation can lead to allopatric speciation, and also put forth some examples of the same.

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Biological Species Infographic By John and Trevor

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The biological species concept is when a species is considered a member of a population, that can breed with each other. Two species livin...

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Biological Species Infographic By John and Trevor

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The biological species concept is when a species is considered a member of a population, that can breed with each other. Two species livin...

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Behavioral isolation is reproductive isolation based on the behavior of species in the context of mating rituals and signals. Also known as ethological isolation, it occurs when two populations are capable of interbreeding, but don't breed because of differences in their courtship rituals. These differences are seen in one of the many cues to the complex courtship rituals of their search-courting-mating process, such as breeding calls (auditory stimuli), mating dances (visual stimuli), pheromones (chemical stimuli), etc.

Example: Each group has its characteristic courtship ritual. This elaborate, complex mating ritual isolates them from closely related species and helps them find the correct mating partner. The blue-footed booby (Sula nebouxii), for instance, shares its habitat with several other species of the genus Sula, but despite all their similarities, it never mates with them. In this case, behavioral isolation is facilitated by the elaborate courtship ritual that is unique to this species. The female blue-footed booby selects a mating partner only after watching the entire courtship ritual.

Explanation: Behavioral isolation prevents the unnecessary waste of efforts in searching, courting, and mating with a partner who will not produce a fertile offspring, which is necessary for the continuity of the species. This mechanism is strictly wired in most species such that despite morphological similarity, some species do not mate even if they are kept together.

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Behavioral Isolation: Unique Examples That Illustrate Its Meaning

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Behavioral isolation is reproductive isolation based on the behavior of species in the context of mating rituals and signals. Also known as ethological isolation, it occurs when two populations are capable of interbreeding, but don't breed because of differences in their courtship rituals.

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California salamanders are a case of evolution in action. Video from PBS.

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In biology, reproductive barriers are mechanisms that prevent closely related species from interbreeding. There are two types of reproductive barriers: prezygotic barriers and postzygotic barriers. While prezygotic barriers prevent mating between two closely related species, postzygotic barriers reduce the chances of an offspring after mating occurs. Of the five prezygotic barriers, temporal barriers work in a unique way, as the prevention of interbreeding in this case is attributed to the fact that the two species in question reproduce at different times of the day, season, or year.

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Temporal Isolation: Definition and Examples

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When it comes to temporal isolation, time is the barrier that prevents species from interbreeding and producing sterile hybrids. In this Buzzle article, we intend to put forth the meaning and some examples of the concept to help you get a good understanding of the same.

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Uploaded by IBBiologyification on 2016-04-12.