Abstract
Mature female sperm whales (Physeter macrocephalus) live in socially cohesive groups of 10-30, which include immature animals of both sexes, and within which there is communal care of the young. We examined kinship in such groups using analyses of microsatellite DNA, mitochondrial DNA sequence, and sex-linked markers on samples of sloughed skin collected noninvasively from animals in three groups off the coast of Ecuador. Social groups were defined through photographic identification of individuals. Each group contained about 26 members, mostly female (79%). Relatedness was greater within groups, as compared to between groups. Particular mitochondrial haplotypes were characteristic of groups, but all groups contained more than one haplotype. The data are generally consistent with each group being comprised of several matrillines from which males disperse at about the age of 6 years. There are indications of paternal relatedness among grouped individuals with different mitochondrial haplotypes, suggesting long-term associations between different matrilines.
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Selected References
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- Dillon M. C., Wright J. M. Nucleotide sequence of the D-loop region of the sperm whale (Physeter macrocephalus) mitochondrial genome. Mol Biol Evol. 1993 Mar;10(2):296–305. doi: 10.1093/oxfordjournals.molbev.a040005. [DOI] [PubMed] [Google Scholar]
- Richard K. R., Whitehead H., Wright J. M. Polymorphic microsatellites from sperm whales and their use in the genetic identification of individuals from naturally sloughed pieces of skin. Mol Ecol. 1996 Apr;5(2):313–315. doi: 10.1111/j.1365-294x.1996.tb00321.x. [DOI] [PubMed] [Google Scholar]
- Sanger F., Nicklen S., Coulson A. R. DNA sequencing with chain-terminating inhibitors. Proc Natl Acad Sci U S A. 1977 Dec;74(12):5463–5467. doi: 10.1073/pnas.74.12.5463. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Werle E., Schneider C., Renner M., Völker M., Fiehn W. Convenient single-step, one tube purification of PCR products for direct sequencing. Nucleic Acids Res. 1994 Oct 11;22(20):4354–4355. doi: 10.1093/nar/22.20.4354. [DOI] [PMC free article] [PubMed] [Google Scholar]