The effects of population bottlenecks on multilocus DNA variation in robins

Article Abstract:

Multilocus minisatellite DNA probes were used to study the effects of bottlenecks on genetic variation in two wild populations of New Zealand robins (Petroica australis australis) and their respective source populations after 20 years of separation. A trend toward the loss of minisatellite DNA variation through bottleneck events was observed. Moderate levels of variation were maintained despite establishment from only one or two founding pairs. DNA variation, therefore, should not be considered as an inevitable consequence of founder events and population bottlenecks.

DNA probes, Electrophoresis, Population genetics, Robins, Genetic transformation

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Minisatellite DNA detects sex, parentage, and adoption in the south polar skua

Article Abstract:

The application of DNA fingerprinting to the problems of sex assignment and the determination of the family relationships within breeding pairs of south polar skua from the Antarctic was investigated. Female-specific DNA fragments were found in minisatellite profiles of these species with 33.15 and pV47-2 multilocus probes. Significant differences were observed in the mean number of bands recorded for each sex.

DNA testing, DNA identification, Sexual behavior in animals, Animal sexual behavior

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Sex-specific restriction fragments and sex ratios revealed by DNA fingerprinting in the brown skua

Article Abstract:

Brown skua were studied for sex-specific restriction fragments and sex ratios using DNA fingerprinting. It was shown that the restriction fragments are located on the W chromosome and are useful in identifying female adults and chicks. A biased ratio among adult birds in breeding territories was seen with almost twice as many males as females. The sex ratio among chicks was 1:1.

Sex (Biology)

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