899 resultados para Evolution and Adaptation


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"Based on three lectures ... given at the Royal institution in February, 1915."--Pref.

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Final report, Oct. 1975 to March 1977; issued Aug. 1977.

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"Based on Public Health Monograph No. 74, Standardized Diagnostic Complement Fixation Method and Adaptation to Micro Test."

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Mode of access: Internet.

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Mode of access: Internet.

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Includes index.

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Includes bibliographical references (p. 225-231).

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Includes bibliographical references and index.

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"Based on a course of eight lectures delivered in November and December, 1910, before the Lowell institute, Boston, as well as on a course of five lectures delivered before the Graduate school of agriculture held under the auspices of the Association of agricultural colleges and experiment stations at Ames, Iowa, in July, 1910."--Pref.

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The Quadrifoliovariinae is revised and three new species of Quadrifoliovarium Yamaguit, 1965 from acanthurid fishes of the genus Naso from waters of the Indo-Pacific are described: Q, maceria n. sp. from N. tonganus, N. annulatus, N. fageni and N. brevirostris; Q. simplex n. sp. from N. tonganus and N. quannulatus; and Q. quattuordecim n. sp. from N. tonganus. Amendments are made to the characterisation of the Quadrifoliovariinae, Quadrifoliovarium, Bilacinia Manter, 1969 and Unilacinia Manter, 1969 in light of observations on type and new material. A molecular phylogeny based on ITS2 and 28S regions of the ribosomal DNA is proposed. The phylogeny suggests that U. asymmetrica is the most basal taxon and Q. simplex n. sp. and Q. quattuordecim n. sp. the most derived. Evolution of morphological traits within the Quadrifoliovariinae are discussed in light of the molecular phylogeny. Molecular sequences of the ITS2 rDNA were identical between specimens of Q. pritchardae collected off Exmouth (Indian Ocean), Heron Island and Lizard Island (Western Pacific) and Moorea (far Eastern Indo-Pacific), indicating a broad Indo-Pacific distribution. All members of the subfamily are recorded only from the acanthurid genus Naso, with the exception of B. lobatum (Yamaguti, 1970), which has been recorded from a pomacanthid. The restricted host range of the group is discussed in the light of the phylogeny of the host genus Naso.