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Zmiany w obrazie termograficznym królika domowego (Oryctolagus cuniculus) w zależności od wieku i stanu fizjologicznego

100%

Łapiński S. , Augustyn J. , Lis M. , Kanik W. , Niedbała P.

Pomiary Automatyka Kontrola

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2011

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tom R. 57, nr 10

1154-1156

PL

Celem badań była ocena różnic w emisji ciepła spowodowanych wiekiem i stanem fizjologicznym królików, przy pomocy metody termowizyjnej. Na podstawie wykonanych pomiarów stwierdzono, iż właściwości ciepłochronne futra królików ulegają zmianie zależnie od wieku i stanu fizjologicznego. Obszarem najsilniej emitującym ciepło są okolice płciowe, których temperatura jest najwyższa u samic mających objawy rui a najniższa u samców i samic ciężarnych. Uszy królików pełnią funkcję termoregulacyjną, a ich temperatura wykazuje znaczną zmienność osobniczą.

EN

The aim of the study was to evaluate the differences in heat emission due to age and physiological state of rabbits. The study was conducted in the spring-summer season for 36 adults and 30 young New Zealand White rabbits. Distribution of the surface temperature of animals was recorded using a Flir System Thermovision A20 camera. The study indicates that the thermographic camera is a useful tool in assessing the rabbit fur quality. At a constant external temperature (19 °C) the genital area is about 1.5 °C cooler than the rabbit body temperature (38,5-40,5 °C), while the surface temperature of the body varies depending on a gender and technological group (p ≤ 0.05) (Tab. 1, Figs. 2 and 3). During pregnancy and lactation the female body is exposed to a greater burden than the male body, which affects directly the density and quality of the fur coat [1]. The genital area was characterized by the highest temperature from among all studied areas. Depending on the physiological state of rabbits it had a different temperature (p ≤ 0.05). This is a consequence of the fact that rabbits are polioestrus animals, ready to get pregnant almost throughout the year. One of the signs that does are sexually receptive is better blood circulation and redness of the vulva [2]. This explains the vulva lower temperature of the pregnant does and higher of lactating does, ready to mating almost immediately after birth. In young animals it was found that the surface temperature of ears was increased in subsequent weeks of life (p ≤ 0.001, Fig. 4, Tab. 2), while the surface temperature of the body decreased (p ≤ 0.001, Figs. 4, 5 and 6, Tab. 2).

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Impact of long-term weakening of the geomagnetic field on the mental state of rats

86%

Tombarkiewicz B. , Pawlak K. , Lis M. , Kanik W. , Lutnicka H. , Niedziolka J.

Acta Neurobiologiae Experimentalis

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2014

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tom 74

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nr 3

EN

Geomagnetic field (GMF) is one of omnipresent, essential for normal development, factors of the environment. Human activity, among others steel construction elements and stock buildings equipment attenuates GMF. Geomagnetic shielding resulted in the anatomical and physiological abnormalities during early stages of growth in and mammals, as well as increase depressive episodes and suicides and are potential reason for development of schizophrenia in individuals born after periods of increased geomagnetic activity. In the present study using an animal model of depression-chronic exposure to mild stressors we investigated if prolonged weakening of the GMF would cause decreased sucrose intake, and if it will affect the level of ACTH and corticosterone which reflects the stress status. The experiment was carried out on male Wistar rats, which were divided on three groups: group A – rats maintained in normal conditions, group B – rats were kept in weakened GMF from 2 months, and group C rats were kept in weakened GMF from two generations. Results of sucrose test could suggest greatest immunity on stress of rats kept in hypogeomagnetic conditions, but higher level of corticosterone in group of rats kept in shielding GMF can suggest, that lasting weakening the GMF was the higher stress than which was caused by other stressors used in an animal model of depression. This study was performed under project DS 3210/KHDZFiZ

3

Effects of geomagnetic field deprivation on germination and early growth of maize variety San (Zea mays L. cv. San)

86%

Tombarkiewicz B. , Mozdzen K. , Kanik W. , Bojarski B. , Pawlak K. , Lis M.

Polish Journal of Agronomy

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2018

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nr 36

4

Effects of geomagnetic field deprivation on embryonic development and hatching of Prussian carp (Carassius gibelio)

72%

Tombarkiewicz B. , Bojarski B. , Olesek A. , Pawlak K. , Kanik W. , Wojnar T. , Lis M. , Socha M.

Folia Biologica

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2018

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tom 66

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nr 4