New evidence for tandem chromosome fusions in the karyotypic evolution of Asian muntjacs

A karyotypic analysis of populations of the gekkos Gehyra variegata and G. punctata reveals three chromosome races in G. variegata (2n = 44; 2n = 40a; 2n = 40b), and three in G. punctata (2n = 44; 2n = 42; 2n = 38). The chromosome races have differentiated by a series of chromosome fusions. The ordered nature of these changes suggests that the phylogenetic relationships of the races cut across the current taxonomy, and it is argued that there is but one 2n = 44 race, occurring as a number of morphologically distinct populations, two of which were erroneously described as the separate Gehyra species. Isolated populations within a number of the chromosome races show pronounced morphological differences. It is believed that these gekkos are an ancient Australian group which differentiated chromosomally during a number of colonizing radiations. Since then, populations within each race have been isolated by geographic barriers and have speciated allopatrically. This suggests that the chromosome races are at least good species and may be of a higher taxon.

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Systematic effects in observed parallaxes

International Astronomical Union Colloquium ◽

10.1017/s0252921100073887 ◽

1978 ◽

Vol 48 ◽

pp. 31-35

Author(s):

R. B. Hanson

Keyword(s):

Error Estimates ◽

Zero Point ◽

Absolute Zero ◽

Apparent Magnitude ◽

Coherent System ◽

Preliminary Results ◽

General Catalogue ◽

Systematic Effects ◽

New Evidence ◽

Right Ascension

Several outstanding problems affecting the existing parallaxes should be resolved to form a coherent system for the new General Catalogue proposed by van Altena, as well as to improve luminosity calibrations and other parallax applications. Lutz has reviewed several of these problems, such as: (A) systematic differences between observatories, (B) external error estimates, (C) the absolute zero point, and (D) systematic observational effects (in right ascension, declination, apparent magnitude, etc.). Here we explore the use of cluster and spectroscopic parallaxes, and the distributions of observed parallaxes, to bring new evidence to bear on these classic problems. Several preliminary results have been obtained.

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MERLIN Finds New Evidence of Ranolazine Safety

Internal Medicine News ◽

10.1016/s1097-8690(07)70525-5 ◽

2007 ◽

Vol 40 (9) ◽

pp. 36

Author(s):

BRUCE JANCIN

Keyword(s):

New Evidence

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Vaccination for travellers – new evidence and recommendations

Therapeutische Umschau ◽

10.1024/0040-5930.58.6.362 ◽

2001 ◽

Vol 58 (6) ◽

pp. 362-366 ◽

Cited By ~ 2

Author(s):

Matius P. Stürchler ◽

R. P. Steffen

Keyword(s):

Hepatitis B ◽

Hepatitis A ◽

New Evidence

Impfungen sind einfache und effektive Maßnahmen zur Verhinderung von Reisekrankheiten. Compliance-Probleme sind gering, da alle Impfungen noch vor Abreise verabreicht werden und bei manchen Impfungen nur eine Dosis für den zuverlässigen Schutz nötig ist. Für jeden Reisenden sind die Hepatitis A- und die Diphtherie-Tetanus-Impfung empfohlen, für Asien und Afrika auch die Polioimpfung. Bei Reisen >30 Tagen, jüngeren Personen und Reisenden mit Risikoverhalten sollte immer auch eine Hepatitis B-Impfung, eventuell als Kombination mit Hepatitis A in Betracht gezogen werden. Je nach Reisestil, -destination und -dauer können auch weitere Impfungen wie z.B. die Typhus-, Tollwut-, Zeckenenzephalitis-, Grippe-, Masern-Mumps-Röteln-, Gelbfieber-, Meningokokkenmeningitis- und die Japanische Enzephalitis-Impfung in Frage kommen. Mehrere Impfungen können gleichzeitig verabreicht werden – eine Staffelung ist nicht nötig. i BAG Supplementum VI, Stand Juli 2000 «Impfungen für Auslandreisende»; http://www.admin.ch/bag/infekt/prev/reisemed/index.htm; Safetravel http://www.safetravel.ch; Tropimed

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