behavioral isolation

[bi′hāv·yə·rəl ī·sə′lā·shən]

(biology)

An isolating mechanism in which two allopatric species do not mate because of differences in courtship behavior. Also known as ethological isolation.

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Thus in the case of complete behavioral isolation, the ISI would be 1, and with no isolation (random mating), the ISI would be 0.

Developing field cage tests to measure mating competitiveness of sterile light brown apple moths (Lepidoptera: Tortricidae) in Western Australia

Behavioral isolation between mainland and Baja adults was measured by recording the number of copulations in groups of 15 pairs of Baja males and females combined with 15 pairs of mainland males and females in a plastic petri dish containing filter paper moistened with fermenting cactus juice.

The magnitude of behavioral isolation, I = 0.26 (SE = 0.073), was caused by the paucity of heterogametic matings, M[female] x B[male] and the significance of the index of female based assortative mating for mainland adults, [I.sub.1] (Table 1).

Premating isolation is determined by larval substrates in cactophilic Drosophila mojavensis

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