INVESTIGADORES
SCHLEICH Cristian Eric
artículos
Título:
Extensive chromosomal variation in Ctenomys talarum talarum from the Atlantic coast of Buenos Aires Province, Argentina (Rodentia: Octodontidae).
Autor/es:
A. MASSARINI, D. MIZRAHI, S. TIRANTI, A. TOLOZA, F. LUNA, C. SCHLEICH
Revista:
MASTOZOOLOGíA NEOTROPICAL
Referencias:
Año: 2002 vol. 9 p. 199 - 207
ISSN:
0327-9383
Resumen:
A sample of 72 specimens from a population of Ctenomys talarum talarum was
collected along a transect of 103 km in the Atlantic coast of Buenos Aires Province, Argentina.
The cytogenetic analysis indicated a wide chromosomal variability, with nine different
karyotypes having diploid numbers ranging from 2N= 44 to 2N=48 and NF=78 and 80. Cand
G- band patterns revealed that a Robertsonian change and a tandem fusion affecting
two different chromosomes pairs could explain these chromosomal polymorphisms. In addition
the relationship between chromosomal variation and environmental factors that limit
Ctenomys distribution was analyzed along the transect. We discuss the significance of the
observed pattern of chromosomal variability in the light of two alternative hypotheses: ecological
adaptive vs. historical demographic factors.