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X-ray microtomography as a tool for taxonomic investigations: prothoracic skeletal structure in some Tenebrionidae (Coleoptera)

100%

Ras M. , Kaminski M. J.

nr 2

An X-ray microtomographic analysis of the prothoracic skeleton structure of seven Platynotina species is presented. The investigated taxa represent different morphological types of pronotal discs. Tenebrio molitor was used as a reference model to all taxonomie considerations. The anatomical evidence gathered and analyzed in this study indicates that lateral indentations of nota, which are visible in most of the Ectateus generic group representatives, corresponds with a placement of the attachments of the pleural apophyses to the bottom of pronotal disc. Therefore, they should be defined as the apophyseal depressions. Furthermore, the main observed differences between the thoracic structure of the species with conspicuous apophyseal depressions and convex pronotal nota concerns the height of the pronotal disc and the elevation of its edges. The current investigations did not revealed any significant modifications of the endoskeletal structure between the prothoraces with or without the basal indentations. The study shows that X-ray microtomographic analysis is a powerful, non-destructive tool for the taxonomie considerations and that it can be safely applied to the name-bearing types. Furthermore, the application of this method, even to the dried entomological material, may provide many advantages over traditional morphological investigations.

Concentrations of isoflavones in blood plasma of dairy cows with different incidence of silent heat

70%

Zdunczyk S. , Piskula M. , Janowski T. , Baranski W. , Ras M.

nr 2

Zaburzenia rozrodu i wybrane wskazniki plodnosci w stadach krow mlecznych objetych programem opieki lekarsko-weterynaryjnej

61%

Baranski W. , Janowski T. , Ras M. , Zdunczyk S. , Opsomer G. , Dewulf J. , De Kruif A.

nr 06

807-811

Reproduction control is a very important part of the herd health program. It has been observed that fertility declines in herds with increased milk yield. Changes in Polish agriculture, including dairy cattle, have been implemented for about 15 years. The aim of this study was to evaluate the incidence of reproduction disorders and different fertility indices in dairy cattle. The study was carried out in 8 dairy herds in North-East Poland with the herd health control and with milk yields from 5200 to 8200 l. The obtained results showed that the incidence of clinical forms of reproduction disorders differed significantly (p ≤ 0.05-0.01) among herds and their value were as follows: abortion rate - 4.0% (1.3-7.1%); retained placenta - 9.7% (5.7-15.6%); endometritis - 18.3% (5.7-42.7%); silent heat - 32.1% (12.5-49.2%); cystic ovarian disease - 7.1% (0-17.7%) and ovarian afunction 7.6% (1.4-16.9%). The intercalving period was 399.7 ± 62.8 days and the culling rate because of reproduction failure was 4.6% (0-9.1%). Reproduction indices describing the quality of artificial insemination were good and carried out as follows: first insemination rate was 52.3% (44-65.3%), service per conception rate was 1.8 (1.5-2.1). The study showed that the most important factor for a longer intercalving period was silent heat. It was likewise observed that the prevalence of ovarian malfunctioning and ovarian cysts as well as endometritis was lower.