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Geographic variation in vocal signals of Ctenomys pearsoni

100%

Francescoli G.

Acta Theriologica

2002

tom 47

nr 1

The S-type vocalizations of three populations of Ctenomys from Uruguay were compared: two of Ctenomys pearsoni Lessa and Langguth, 1983 from Penino and Relincho and the third from a different karyomorph of the genus (Solis karyomorph). Ten rhythm and 3 frequency variables were used for discriminant analysis. The results showed that a set of nine variables allowed a complete separation of the populations. The two C. pearsoni populations were correctly discriminated from one another using four variables, the differences lying especially in the rhythm domain. Information about the general biology and distribution of the animals suggest that these differences could be explained as a product of chance variations and later fixation of the variants in local populations. The Solis karyomorph was also correctly discriminated from the other populations using four variables, but main frequency seems to play an important role in this case.

Vocal signals from Ctenomys pearsoni pups

84%

Francescoli G.

Acta Theriologica

2001

tom 46

nr 3

Calls emitted by newborn pups of Ctenomys pearsoni Lessa and Langguth, 1983 away from the nest were frequency modulated succesive notes. The notes were characterized by mean maximum frequency under 5165 Hz, with mean main frequency under 2155 Hz, and mean note duration under 0.165 s. Their possible function as contact or distress calls, resulting in recovering to the nest by the mother, is discussed.

Ograniczanie wyników

2 Acta Theriologica

2 Francescoli G.

1 2002

1 2001

Wyniki wyszukiwania

Geographic variation in vocal signals of Ctenomys pearsoni

Vocal signals from Ctenomys pearsoni pups