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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

New data on the ichthyosaur Platypterygius hercynicus and its implications for the validity of the genus

100%
Fischer V.
Acta Palaeontologica Polonica
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2012
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tom 57
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nr 1
The description of a nearly complete skull from the late Albian of northwestern France reveals previously unknown anatomical features of Platypterygius hercynicus, and of European Cretaceous ichthyosaurs in general. These include a wide frontal forming the anteromedial border of the supratemporal fenestra, a parietal excluded from the parietal foramen, and the likely presence of a squamosal, inferred from a very large and deep facet on the quadratojugal. The absence of a squamosal has been considered as an autapomorphy of the genus Platypterygius for more than ten years and has been applied to all known species by default, but the described specimen casts doubt on this putative autapomorphy. Actually, it is shown that all characters that have been proposed previously as autapomorphic for the genus Platypterygius are either not found in all the species currently referred to this genus, or are also present in other Ophthalmosauridae. Consequently, the genus Platypterygius must be completely revised.
2

Biotechnologia na ratunek rolnictwu

51%
Borel J. C., Fischer V., Fischhoff D. A., Galindez A.
Świat Nauki
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2009
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nr 11
3

School based skin cancer education intervention

51%
Reding D. J., Fischer V., Lappe K., Gunderson P. D.
Annals of Agricultural and Environmental Medicine
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1994
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tom 01
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nr 2
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

A mysterious giant ichthyosaur from the lowermost Jurassic of Wales

33%
Martin J. E., Vincent P., Suan G., Sharpe T., Hodges P., Williams M., Howells C., Fischer V.
Acta Palaeontologica Polonica
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2015
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tom 60
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nr 4
Ichthyosaurs rapidly diversified and colonised a wide range of ecological niches during the Early and Middle Triassic period, but experienced a major decline in diversity near the end of the Triassic. Timing and causes of this demise and the subsequent rapid radiation of the diverse, but less disparate, parvipelvian ichthyosaurs are still unknown, notably because of inadequate sampling in strata of latest Triassic age. Here, we describe an exceptionally large radius from Lower Jurassic deposits at Penarth near Cardiff, south Wales (UK) the morphology of which places it within the giant Triassic shastasaurids. A tentative total body size estimate, based on a regression analysis of various complete ichthyosaur skeletons, yields a value of 12-15 m. The specimen is substantially younger than any previously reported last known occurrences of shastasaurids and implies a Lazarus range in the lowermost Jurassic for this ichthyosaur morphotype.
5

Different levels of supplied energy for lactating cows affect physicochemical attributes of milk

33%
Gabbi A. M., McManus C. M., Marques L. T., Abreu A. S., Machado S. C., Zanela M. B., Barbosa R. S., Fischer V.
Journal of Animal and Feed Sciences
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2018
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tom 27
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nr 1
In the period from 2004 to 2011, seven trials on lactating cows were conducted to evaluate the relationship between the amounts of energy required, and milk production and composition. In total, 392 observations on 132 animals were selected due to different levels of energy intake. The observations were classified into three groups according to the amount of total digestible nutrients (TDN) provided by the diets, i.e. 67, 75 and 94% TDN. Such characteristics as proportion of energy provided in relation to cow requirements, experiment duration, daily milk production, and fat, protein and lactose contents, total solids percentage, somatic cell score, titratable acidity and ethanol stability test were considered. Levels of supplied energy were positively related with milk production, ethanol stability and lactose content. Seven variables were regarded as discriminant between levels of supplied energy, including proportion of provided energy related to cow requirement, duration of the experiments, ethanol stability test and milk production, and explained more than 70% of the variance among the observations. Milk production increased linearly with the proportion of the supplied energy from 14, 16 to 19 kg · d−1 per cow, while lactose content increased from 4.37 to 4.56% as the level of TDN attained 93% of estimated requirements. Milk stability increased from 74.2 to 76.4% as the level of TDN attained 79% of estimated requirements. Increased level of the supplied energy related to requirements of lactating cows improved milk yield, milk stability and lactose content.
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