Wyniki wyszukiwania

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The reaction of healthy hooves, claws and nails to a 3 percentage solution of hydrogen peroxide

100%

Mordak R., Anthony P. S.

Acta Scientiarum Polonorum. Medicina Veterinaria

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2007

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tom 06

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nr 4

2

Use of forest canopy by European red squirrels Sciurus vulgaris in Northern Greece: claws and the small branch niche

84%

Samaras A., Youlatos D.

Acta Theriologica

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2010

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tom 55

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nr 4

Moving and standing in trees impose multiple problems to arboreal mammals. Among them, the major ones are the negotiation of slender terminal branches and of large vertical supports. Both microhabitats are important as they have been linked alternatively to the evolutionary loss of claws in early primates. Therefore, rates of use of these different supports by claw-bearing arboreal mammals may offer insights to their actual significance in the adaptive evolution of early primates. In this context, canopy, tree crown, branch size, inclination, and texture use were recorded on four adult free ranging European red squirrelsSciurus vulgaris Linnaeus, 1758 in a mixed coniferous forest in northern Greece.S. vulgaris was mainly arboreal, exploiting the terminal branch zone, using frequently oblique and intermediately textured supports<5 cm and moderately large vertical branches. Furthermore, comparative data from other sciurid species and clawed primates showed positive correlations of small and horizontal support use, and negative ones of vertical support use to body mass. These findings show that keeled functional claws do not impede habitual use of slender branches and may not facilitate efficient climbing on large vertical trunks. These observations partly question the association between habitual use of the small branch niche and primate adaptations and lend support to alternative hypotheses, underscoring the importance of inquiring for more complex mechanisms that lead to the evolution of the unique set of primate morphological adaptations.

3

Length of claws in coypus reared in different cages

84%

Cholewa R.

Zeszyty Naukowe. Przegląd Hodowlany

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1996

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tom 27

4

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Epibiota associated with setae on Chinese mitten crab claws (Eriocheir sinensis H. Milne-Edwards, 1853): a first record

84%

Normant M., Korthals J., Szaniawska A.

Oceanologia

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2007

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tom 49

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nr 1

Eriocheir sinensis H. Milne-Edwards, 1853 is a non-native species found in European waters. Analyses of mitten crabs caught in brackish waters (Gulf of Gdańsk, Poland) and in freshwater (Havel River, Germany) have indicated that numerous epibionts (possibly temporary) inhabit the dense setal mats that cover the chelipeds. Of the 950 associates found on 22 crabs collected from brackish water, the most abundant were Nematoda (82.3%), followed by Bivalvia (10.3%), Crustacea (5.6%), Oligochaeta (1.2%) and Gastropoda (0.6%). In comparison, 1280 specimens (Chironomidae – 67.6% and Halacaridae – 32.4%), were identified from 13 crabs collected in freshwater. As this crab can migrate long distances, it is capable of transporting native and non-native species via its mittened claws to new habitats.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Medicina Veterinaria

1 Acta Theriologica

1 Oceanologia

1 Zeszyty Naukowe. Przegląd Hodowlany

1 Anthony P. S.

1 Cholewa R.

1 Korthals J.

1 Mordak R.

1 Normant M.

1 Samaras A.

1 Szaniawska A.

1 Youlatos D.

1 2010

2 2007

1 1996

The reaction of healthy hooves, claws and nails to a 3 percentage solution of hydrogen peroxide

Use of forest canopy by European red squirrels Sciurus vulgaris in Northern Greece: claws and the small branch niche

Length of claws in coypus reared in different cages

Epibiota associated with setae on Chinese mitten crab claws (Eriocheir sinensis H. Milne-Edwards, 1853): a first record