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Relative growth and annual size variation in Crocidura russula from the Ebro Delta Spain

100%

Lopez-Fuster M. J., Ventura J.

Acta Theriologica

1992

tom 37

nr 4

We report data on the somatometry of the white-toothed shrew Crocidura russula (Hermann, 1780), based on 302 specimens (153 males, 149 females) captured between 1980 and 1982 in the Ebro Delta (northeastern Spain). Variations in body size and weight were analysed according to sex, relative age (estimated by tooth wear) and month of capture. Relative and seasonal growth were also studied. No statistical difference in body size was detected between sexes. The specimens showed highest growth rate up to about fourteen weeks of age. Afterwards, most of the variations detected in body length and especially in weight were basically related to sexual stage. Specimens born in the first litters of the year grew faster than those born at the end.

Geographic variation in the Japanese white-toothed shrew Crocidura dsinezumi

100%

Motokawa M.

Acta Theriologica

2003

tom 48

nr 2

I investigated geographic variation in the Japanese white-toothed shrew Crocidura dsinezumi (Temminck, 1842) (Insectivora, Soricidae) from the Japanese Archipelago and the northern part of the Ryukyu Archipelago. Univariate and multivariate analyses were conducted based on 11 cranial measurements from 14 sampling localities. Overall size variation seemed to follow clinal changes correlated with latitude and longitude of localities, such that northeastern populations were smaller than southwestern ones. The Hokkaido population and the Kuchinoerabujima population were larger than expected based on estimated values, likely due to changes reflecting environmental factors. In contrast, the Tanegashima population was smaller than its estimated value. The northern Ryukyu populations were divergent from the Kyushu population and from each other. Based on patterns of geographic variation, I suggest that all previously described subspecies of C. dsinezumi are junior synonyms of C. dsinezumi; and that the Kuchinoerabujima population and the Nakanoshima population likely represent un- described subspecies.

Ograniczanie wyników

2 Acta Theriologica

1 Lopez-Fuster M. J.

1 Motokawa M.

1 Ventura J.

1 2003

1 1992

Wyniki wyszukiwania

Relative growth and annual size variation in Crocidura russula from the Ebro Delta Spain

Geographic variation in the Japanese white-toothed shrew Crocidura dsinezumi