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Swimming ability of the Mediterranean pine vole Microtus [Terricola] duodecimcostatus

100%

Giannoni S. M., Borghi C. E., Martinez-Rica J. P.

Acta Theriologica

1994

tom 39

nr 3

We studied the swimming capacity of the fossorial rodent Microtus (Terrícola) duodecimcostatus fde Sélys-Longchamps, 1839), and found it to be a proficient swimmer in comparison with other fossorial species. We determined that main factor affecting swimming ability is the resistance of its hair to water absorption and its small body size. The hypothesis suggesting that insectivore moles are better swimmers than rodent mole is discussed. We find that body size, rather than the taxonomical group (insectivore or rodent), appears to be an important factor affecting swimming ability of fossorial species. The wide distribution of M. (7*.) duodecimcostatus could be partly explained by its high swimming ability; rivers, therefore, may not be significant geographical barriers to its dispersal.

Migratory movements of Miniopterus schreibersii in the north-east of Spain

100%

Serra-Cobo J., Sanz-Trullen V., Martinez-Rica J. P.

Acta Theriologica

1998

tom 43

nr 3

This article analyses information gathered between 1984 and 1995 relating to the seasonal movements of Miniopterus schreibersii (Kuhl, 1819) in the north-east of Spain. The recapture rate of banded different individuals is 32.5% and the total recapture rate is 53.4%. Ninety five different trajectories have been reported. The bats cover an average distance of 120 km between their hibernation sites and summer roosts. The longest longevity recorded here is almost 10 years. Localities where M. schreibersii was observed were grouped by seasonal use pattern and according the species biological cycle. Two new hibernation sites, seven new breeding sites and sixteen new equinoctial sites have been discovered in this study. From the verified flight trajectories, the distribution of shelters and the ethological characteristics of the species, the most probable migration path have been established.

Ograniczanie wyników

2 Acta Theriologica

2 Martinez-Rica J. P.

1 Borghi C. E.

1 Giannoni S. M.

1 Sanz-Trullen V.

1 Serra-Cobo J.

1 1998

1 1994

Wyniki wyszukiwania

Swimming ability of the Mediterranean pine vole Microtus [Terricola] duodecimcostatus

Migratory movements of Miniopterus schreibersii in the north-east of Spain