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The occurrence of wildcats in the southern Swiss Jura Mountains

100%

Dotterer M. , Bernhart F.

Acta Theriologica

1996

tom 41

nr 2

Fourteen wildcats Felis siluestris silvestris Schreber, 1777 were trapped in winter 1993 in the southern part of the Swiss Jura Mountains as a bycatch. During the last thirty years of protection the presence of wildcats in Switzerland could be confirmed by a few dead-found individuals, but the status of the species was unknown. This is the first indication of an existing population. Even though the upper distribution limit of wildcats in central and western Europe is described at 800 m a.s.l., most individuals were caught in altitudes from 970 to 1200 m. We registered a higher catching success in south exposed beech forest and in the sycamore forest, than in the northern exposed Norway spruce forest. During snowcover above 30 cm no wildcats were caught. The capture sites were located within distances of 200-1900 m from human settlements.

Feeding habits of the Eurasian lynx in the Swiss Jura Mountains determined by faecal analysis

84%

Weber J. M. , Weissbrodt M.

Acta Theriologica

1999

tom 44

nr 3

The feeding habits of the Eurasian lynx were investigated in the Swiss Jura Mountains. Fifty one food items were identified in 38 scats of which most were collected on lynx tracks. Wild ungulates - roe deer and chamois - contributed 47.1% of the overall diet, while hare and rodents represented 19.6% and 17.6% of the prey items.

Prey spectrum, prey preference and consumption rates of Eurasian lynx in the Swiss Jura Mountains

84%

Jobin A. , Molinari P. , Breitenmoser U.

Acta Theriologica

2000

tom 45

nr 2

We examined 617 kills made by radio-tracked Eurasian lynx Lynx lynx (Linnaeus, 1758) from March 1988 to May 1998 to assess prey spectrum, preference, and food consumption rates in the Swiss Jura Mountains. Roe deer Capreolus capreolus and chamois Rupicapra rupicapra were the main prey (69 and 22%, respectively), followed by red fox Vulpes vulpes, brown hare Lepus europaeus, domestic cat Felis calus, wild cat Fclis sylvestris, marmot Marmota marmota, pine marten Martes marles, capercaillie Telrao urogallus, and badger Meles meles. Lynx fed on an ungulate prey from 1 to 7 days, depending on the prey category. The consumption rates of males, of females alone, and of females with kittens varied from 3.2 to 4.9 kg per night, with an increasing trend as the kittens grew older. Including the days when lynx had no kill (searching time) lynx consumed 2 ± 0.9 kg per night. The mean searching time was 1.5-2 days for females, depending on the season and the number of kittens, and 2.5 days for males. The mean interval between consecutive kills was 5.9 for males and 5.2 days for females, respectively. At 38% of carcasses the presence of one or several scavengers (red fox, raven Corvus corax or both) was detected, Although 69% of the kills were roe deer and only 22% chamois, we hypothesise that in the forests of the Jura Mountains chamois are more vulnerable to lynx predation than roe deer, as chamois had a slightly higher preference index (0.59) than roe deer (0.41), based on rough estimates of the two ungulate populations in the study area.

Did plate tectonics control the generic diversity of Jurassic brachiopods? One point of view

67%

Ruban D. A.

Geologos

2018

tom Vol. 24, No. 1

79--84

Possible plate tectonic controls on faunal diversity dynamics have been discussed in the geological literature for around 50 years. The new model of plate tectonic processes is here linked to Jurassic generic diversity (simple α-diversity) of brachiopods. This comparison offers three observations, four hypotheses and three unresolved issues. Most importantly, changes in the global plate root mean square speed coincided with brachiopod diversity dynamics, which can be explained hypothetically by either environmental disturbance triggered by more active plate motion or activity of any process (such as eustasy) tied to plate tectonic mechanisms and with an impact on marine benthic communities. It is also established that global generic diversity dynamics of brachiopods during the Jurassic coincided with the regional picture as established for the Northern Caucasus and the Swiss Jura Alps; this coincidence is difficult to explain with regard to plate tectonics. These and other speculative considerations do not clarify the role of the plate tectonic factor in Jurassic generic diversity dynamics of brachiopods, and, thus, they indicate important issues for further research.