Proliferation and apoptosis in the guinea pig adrenal cortex during postnatal development

The aim of the study was to determine the relation between involution of the FZ and the proliferation and apoptosis of the adrenal cortex cells. The study was carried out with adrenal glands from guinea pigs aged 1, 3, 9, 14, 21, 35 and 90 days. Paraffin slices were stained with Mayer haematoxylin and eosin and with acid fuchsin. For the immunohistochemical reaction the Anti -PCNA Clone PC10 (Dako) was used. Apoptosis evaluation was performed with use of the TUNEL method (Roche). The results support the theory of involution of the FZ cells realised mainly by way of apoptosis. Analysis of the distribution and number of PCNA-positive cells in the adrenal cortex on subsequent days of PD may also back up the migration theory of renewal of the adrenal cortex cells

The response of mixture grasses with white clover in pastural utilization at deficiency of water and sprinkling irrigation

На пастбище, заложенном на лёгкой минеральной почве, исследовалось влияние дождевания и удобрения азотом на урожай злаковых трав и белого клевера, а также на их количественные соотношения в травосмеси. Дождевание больше увеличивало урожай клевера чем злаков, зато удобрение азотом увеличивало урожай злаков, уменьшало урожай клевера. В среднем за два года исследований в травосмеси без удобрения азотом и без орошения было 27% клевера, а при орошении 45%. В травосмеси удобренной дозой 240 кг N/гa без орошения было 9% клевера, а при орошении 20%.The influence of sprinkling irrigation and nitrogen fertilization on yield grasses and white clover and their quantity relations in mixture was investigated on pasture founded on light mineral soil. The irrigation increased the yield of clover more than grasses, however nitrogen fertilization increased the yield of grasse and decreased the yield of clover. The average in two years of investigations, the mixture not fertilized with nitrogen and not irrigated contained 27% of clover while irrigated 45%. The mixture fertilized with dose 240 kg N/ha and not irrigated contained 9% of clover while irrigated 20%

Position, structure and function of pulsatile vesicles in parasitic leeches Codonobdella truncata Grube, 1873 and Caspiobdella fadejewi Epshtein, 1961 [Hirudinea, Piscicolidae, Piscicolinae]

Histological analysis of frontal section through the body of parasitic leeches (Codonobdella truncata, Caspiobdella fadejewi) of the subfamily Piscicolinae revealed the presence of 11pairs of subepidermal pulsatile vesicles. The vesicles of C. truncata are poorly visible on the body surface, contrary to those of C. fadejewi, which results from the fact that in the former species the vesicles are located in a layet of subepidermal connective tissue thicker (82.82 μm) than in C.fadejewi (20.6 μm). In the studied species the pulsatile vesicles have a club-like shape, are surronded by a muscular tunicle and connected with a short canal that penetrates the body wall. Some of the sections show that the vesicles are divided in two chambers (lower and upper) with an incomplete membrane

Pasozytnicza pijawka Batracobdelloides moogi [NESEMANN & CSANYI, 1995] [Hirudinea, Glossiphoniidae Vaillant, 1850] w faunie Polski?

In the light of recent studies (NESEMANN and CSÁNYI 1995) on the genus Batracobdella (VIRGUIER 1879) Batracobdella paludosa (CARENA 1824) - a component of the Polish fauna - is actually Batracobdelloides moogi (NESEMANN and CSÁNYI 1995)

Pasożytnicza pijawka Batracobdelloides moogi [NESEMANN & CSANYI, 1995] [Hirudinea, Glossiphoniidae Vaillant, 1850] w faunie Polski?

In the light of recent studies (NESEMANN and CSÁNYI 1995) on the genus Batracobdella (VIRGUIER 1879) Batracobdella paludosa (CARENA 1824) - a component of the Polish fauna - is actually Batracobdelloides moogi (NESEMANN and CSÁNYI 1995)

Variability of the reproductive system of Piscicola respirans [Troschel, 1850] [Hirudinea, Piscicolidae]

The studies on the reproductive system of P. respirans, based on 115 specimens, have revealed its considerable variability. Two main types of the system can be distinguished: 1) ovaries reaching the first pair of testes, ejaculatory ducts symmetrical, no seminal vesicles (juvenile individuals), 2) ovaries reaching the first pair of testes, ejaculatory ducts symmetrical, seminal vesicles reaching the ends of ovaries (adults individuals). The structure of the reproductive system is correlated with the individual size and age. Because the reproductive system of P. respirans as described by BRUMPT (1900) and SKET ( 1968) based on type specimens designated by them, is found only in a small fraction (c. 4-8%) of specimens, a redescription of the species is necessary, best based on a neotype series

ZMIENNOŚĆ UKŁADU ROZRODCZEGO PISCICOLA RESPIRANS (TROSCHEL, 1850) (HIRUDINEA, PISCICOLIDAE)

The studies on the reproductive system of P. respirans, based on 115 specimens, have revealed its considerable variability. Two main types of the system can be distinguished: 1) ovaries reaching the first pair of testes, ejaculatory ducts symmetrical, no seminal vesicles (juvenile individuals), 2) ovaries reaching the first pair of testes, ejaculatory ducts symmetrical, seminal vesicles reaching the ends of ovaries (adults individuals). The structure of the reproductive system is correlated with the individual size and age. Because the reproductive system of P. respirans as described by BRUMPT (1900) and SKET ( 1968) based on type specimens designated by them, is found only in a small fraction (c. 4-8%) of specimens, a redescription of the species is necessary, best based on a neotype series

Variability of the reproductive system of Piscicola fasciata [Kollar, 1842 [Hirudinea, Piscicolidae]

The studies on the reproductive system of P. fasciata were based on 43 specimens. Two main types of the reproductive system can be distinguished in the studied population. Two types of reproductive system were the most frequent (20.93% each): with symmetrical ejaculatory ducts without a loop and symmetrical seminal vesicles reaching the end of the first pair of testes, situated next to the testes (adult individuals) (fig. 23) and with symmetrical ejaculatory ducts without a loop (fig. 21) and symmetrical poorly developed seminal vesicles situated asymmetrically anterior to the first pair of testes (juvenile individuals). The structure of the reproductive system corresponding with the description of the type specimen (BRUMPT, 1900) was not observed in the studied population