The effect of starvation on the metabolic rate and microanatomy of Galumna elimata (Acari: Oribatida)
The physiological parameters mortality, mass, oxygen consumption and amylase activity, and microanatomical features of the digestive tract, mesenchym and reproductive organs were used to characterise starvation in Galumna elimata. The mites were reared in sterilised plastic vials containing moistene...
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Institute of Entomology, Biology Centre, Czech Academy of Science
2001-10-01
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doaj-78df1c88f3974ef78df9bf2c4896da702021-04-16T20:33:10ZengInstitute of Entomology, Biology Centre, Czech Academy of ScienceEuropean Journal of Entomology1210-57591802-88292001-10-0198326527510.14411/eje.2001.043eje-200103-0002The effect of starvation on the metabolic rate and microanatomy of Galumna elimata (Acari: Oribatida)Jan HUBERT0Vladimír ŠUSTR1Research Institute of Crop Production, Drnovská 507, Praha 6, CZ-161 06, Czech Republic; e-mail: hubert@hb.vurv.czInstitute of Soil Biology, Czech Academy of Sciences, Na sádkách 7, České Budějovice, CZ-370 05, Czech Republic; e-mail: sustr@upb.cas.czThe physiological parameters mortality, mass, oxygen consumption and amylase activity, and microanatomical features of the digestive tract, mesenchym and reproductive organs were used to characterise starvation in Galumna elimata. The mites were reared in sterilised plastic vials containing moistened zeolite at 25°C and a 12:12 photoperiod. The control group was kept under the same conditions, but pieces of bark covered with the green bark alga, Desmococcus vulgaris (syn. Protococcus viridis), were added as food for the mites. The physiological parameters were recorded after 21 days, and the microanatomical after 21 and 42 days. The guts of the starved mites were empty or filled with mucoid substances, while the guts of control mites contained food boli formed from algal cells. The mortality was significantly higher in starved animals. The mortality after 42 days of starvation was higher in males than females. The fresh mass of starved individuals significantly decreased while the water proportion content of their body tissues increased. Oxygen consumption of the starved mites was lower. Starvation did not influence the activity of amylase. Glycogeneous granulae were characteristically absent, and mucoid substances present in the guts of mites starved for 21 days. The activity of mesenteral and caecal cells, proventricular glands and cells of salivary glands was reduced after 42 days of starvation. The cells of the seminal vesicles were reduced and contained no spermatic cells in males starved for 42 days. Starved females probably resorbed immature oocytes, but had eggs in their oviducts. Starvation induces ovovivipary or larvipary in Galumna elimata.https://www.eje.cz/artkey/eje-200103-0002_The_effect_of_starvation_on_the_metabolic_rate_and_microanatomy_of_Galumna_elimata_Acari_Oribatida.phpacarigalumna elimatastarvationmortalityfresh massrespirationamylasemicroanatomygut |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jan HUBERT Vladimír ŠUSTR |
spellingShingle |
Jan HUBERT Vladimír ŠUSTR The effect of starvation on the metabolic rate and microanatomy of Galumna elimata (Acari: Oribatida) European Journal of Entomology acari galumna elimata starvation mortality fresh mass respiration amylase microanatomy gut |
author_facet |
Jan HUBERT Vladimír ŠUSTR |
author_sort |
Jan HUBERT |
title |
The effect of starvation on the metabolic rate and microanatomy of Galumna elimata (Acari: Oribatida) |
title_short |
The effect of starvation on the metabolic rate and microanatomy of Galumna elimata (Acari: Oribatida) |
title_full |
The effect of starvation on the metabolic rate and microanatomy of Galumna elimata (Acari: Oribatida) |
title_fullStr |
The effect of starvation on the metabolic rate and microanatomy of Galumna elimata (Acari: Oribatida) |
title_full_unstemmed |
The effect of starvation on the metabolic rate and microanatomy of Galumna elimata (Acari: Oribatida) |
title_sort |
effect of starvation on the metabolic rate and microanatomy of galumna elimata (acari: oribatida) |
publisher |
Institute of Entomology, Biology Centre, Czech Academy of Science |
series |
European Journal of Entomology |
issn |
1210-5759 1802-8829 |
publishDate |
2001-10-01 |
description |
The physiological parameters mortality, mass, oxygen consumption and amylase activity, and microanatomical features of the digestive tract, mesenchym and reproductive organs were used to characterise starvation in Galumna elimata. The mites were reared in sterilised plastic vials containing moistened zeolite at 25°C and a 12:12 photoperiod. The control group was kept under the same conditions, but pieces of bark covered with the green bark alga, Desmococcus vulgaris (syn. Protococcus viridis), were added as food for the mites. The physiological parameters were recorded after 21 days, and the microanatomical after 21 and 42 days. The guts of the starved mites were empty or filled with mucoid substances, while the guts of control mites contained food boli formed from algal cells. The mortality was significantly higher in starved animals. The mortality after 42 days of starvation was higher in males than females. The fresh mass of starved individuals significantly decreased while the water proportion content of their body tissues increased. Oxygen consumption of the starved mites was lower. Starvation did not influence the activity of amylase. Glycogeneous granulae were characteristically absent, and mucoid substances present in the guts of mites starved for 21 days. The activity of mesenteral and caecal cells, proventricular glands and cells of salivary glands was reduced after 42 days of starvation. The cells of the seminal vesicles were reduced and contained no spermatic cells in males starved for 42 days. Starved females probably resorbed immature oocytes, but had eggs in their oviducts. Starvation induces ovovivipary or larvipary in Galumna elimata. |
topic |
acari galumna elimata starvation mortality fresh mass respiration amylase microanatomy gut |
url |
https://www.eje.cz/artkey/eje-200103-0002_The_effect_of_starvation_on_the_metabolic_rate_and_microanatomy_of_Galumna_elimata_Acari_Oribatida.php |
work_keys_str_mv |
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