Periodicity of hibernation of dormice (Glis glis) maintained under controlled conditions

1976 ◽  
Vol 54 (4) ◽  
pp. 437-441 ◽  
Author(s):  
Grace Workman Scott ◽  
Kenneth C. Fisher
Keyword(s):  
Endogenous Rhythm ◽  
Glis Glis ◽  
Controlled Conditions ◽  
First Time

The pattern of hibernation of nine captive dormice Glis glis kept at 0 °C and 12 h light: 12 h dark for several years was determined. Six of the animals hibernated deeply. In these the separation between an active and a hibernation season was less distinct than in species previously studied and this led to difficulties in measuring the period of the hibernation cycle. These were resolved by the use of a monthly hibernation index, used here for the first time. In five of the animals, on one or more occasions hibernation continued without arousal for more than 25 days; the maximum uninterrupted period of hibernation was 40 days. The observations made were consistent with the view that hibernation in Glis glis results from an endogenous rhythm. However, the period of the rhythm, only 6.1 months on the average, was not circannual.

Hibernation of eastern chipmunks (Tamias striatus) maintained under controlled conditions

1972 ◽  
Vol 50 (1) ◽  
pp. 95-105 ◽  
Author(s):  
Grace Workman Scott ◽  
Kenneth C. Fisher
Keyword(s):  
Temperature Sensors ◽  
Endogenous Rhythm ◽  
Bottom Temperature ◽  
Tamias Striatus ◽  
Controlled Conditions ◽  
Eastern Chipmunks ◽  
First Time ◽  
Periodic Arousals

The hibernation pattern of captive eastern chipmunks maintained under controlled conditions of light and temperature was examined. It was consistent with the view that hibernation results from an endogenous rhythm with a periodicity of about a year, probably temperature independent.Continuous recording from nest bottom temperature sensors was tested for the first time with this species and found to be more accurate than the sawdust technique for detecting arousals. It also provided useful information about trends in body temperature.The hypothesis that a shift in the temperature at which heat-producing responses are mobilized occurs during hibernation and that it is responsible for the pattern of periodic arousals, is discussed in relation to the observations made.

scholarly journals First evidence of Paraheligmonina gracilis and Hymenolepis sulcata among fat dormice (Glis glis L.) from Croatia

2007 ◽  
Vol 44 (1) ◽  
pp. 34-36 ◽  
Author(s):  
D. Konjević ◽  
M. Špakulová ◽  
R. Beck ◽  
M. Goldová ◽  
K. Severin ◽  
...  
Keyword(s):  
Helminth Species ◽  
Human Nutrition ◽  
Parasitic Infestation ◽  
Glis Glis ◽  
Zoonotic Pathogens ◽  
Concurrent Infections ◽  
First Time ◽  
Hymenolepis Sulcata

AbstractThe present study reports for the first time on the helminth species occurring in the gastro-intestinal system of fat dormice (Glis glis) in Croatia. Out of 55 dormice, 63.7 % harboured helminths belonging to two species, the nematode Paraheligmonina gracilis (syn. Longistriata elpatievskii) (Heligmonellidae, Trichostrogyloidea) in the prevalence of 52.7 %, and the cestode Hymenolepis sulcata (Hymenolepididae, Cyclophyllidea) in the prevalence of 32.7 %. Concurrent infections of both parasites were found in 12 fat dormice, P. gracilis alone was detected in 17 hosts and H. sulcata alone in 6 samples. No influence of parasitic infestation on animal weight was observed. Glirid helminths do not represent zoonotic pathogens despite the fact that dormice occasionally inhabit cottages and village houses, and are used in human nutrition.

scholarly journals The Nutrition of Mycorrhiza Plants: Calluna Vulgaris

1925 ◽  
Vol 2 (2) ◽  
pp. 265-292
Author(s):  
M. C. RAYNER
Keyword(s):  
Experimental Data ◽  
Experimental Work ◽  
Vascular Plant ◽  
Calluna Vulgaris ◽  
Seedling Development ◽  
Seasonal Development ◽  
Controlled Conditions ◽  
Rooting Medium ◽  
Mycorrhiza Formation ◽  
First Time

1. An account is given of the formation and seasonal development of mycorrhiza in Ling (Calluna vulgaris). 2. Digestion of the intracellular complex of mycelium in the mycorrhiza cells is recorded for the first time and the cytology of the process is described. 3. Knowledge of the distribution of the endophyte in the shoot tissues has been extended, and is confirmed by experimental work on cuttings struck in sterilised sand under controlled conditions. The endophyte has been recovered and identified from the shoot. 4. The results thus obtained are compared with those described by Christoph, whose observations are interpreted in the light of the account now given of the formation of "suppressed mycorrhiza" in roots of cuttings, and also in those of seedlings and mature plants when certain conditions exist in the rooting medium. 5. It is pointed out that the "obligate relation" in Calluna is associated with infection and seedling development and not with mycorrhiza formation and growth. The view is expressed that plants would probably grow quite well without mycorrhiza could seedlings be raised free from infection. In nature, the formation of mycorrhiza in all roots is the rule; the activities of the endophyte and its digestion products are presumably related to the nutrition of the plant and may be correlated with its growth in particular soils. 6. The evidence for exchange of nutritive material is stated and examined. The view has been reached that such exchange exists, with a "balance of profit" on the side of the vascular plant. 7. In view of its application to cases for which experimental data are not available, it is suggested that the term "symbiosis" as applied to mycorrhiza plants should be used in the older sense defined by de Bary.

A modified assay method shows leaf sucrose-phosphate synthase activity is correlated with leaf sucrose content across a range of sugarcane varieties

1998 ◽  
Vol 25 (4) ◽  
pp. 499 ◽  
Author(s):  
Christopher P.L. Grof ◽  
Deon P. Knight ◽  
Scott D. McNeil ◽  
John E. Lunn ◽  
James A. Campbell
Keyword(s):  
Sucrose Phosphate Synthase ◽  
Assay Method ◽  
Sucrose Content ◽  
Saccharum Spp ◽  
Sugarcane Varieties ◽  
Controlled Conditions ◽  
The Cross ◽  
First Time ◽  
Sucrose Phosphate ◽  
Phosphate Synthase

Eight different commercial and breeding varieties of sugarcane (Saccharum spp.) grown in controlled conditions were assayed for leaf sucrose-phosphate synthase (SPS) (EC 2.1.4.14) activity and leaf sucrose content. Leaf SPS activity measured at 25˚C ranged between 0.06 and 0.14 nmol sucrose formed mg protein -1 min-1. The cross-varietal average for leaf SPS activity was 0.10 nmol µg protein-1 min-1 (equivalent to 63.4 µmol h-1 g FW-1 or 17.6 nkat g FW-1) which is consistent with previously published leaf SPS activities for sugarcane; however, previous studies have assayed leaf SPS activity at either 30 or 37˚C. The range of leaf sucrose content across varieties (5.5–18.0 mg sucrose g FW-1, average 11.3 mg g FW-1) was consistent with all but one of four previously published reports. Leaf SPS activity and leaf sucrose content were significantly correlated across the eight varieties examined (r2 =0.877, d.f. =7,P<0.001). Whilst previous reports have indicated a co-relationship between leaf SPS activity and leaf sucrose content in single sugarcane varieties both diurnally and with different nutrient regimes, this study shows, for the first time, that this co-relationship also holds true across a range of sugarcane varieties.

Bioremediation of a Cyanide-Contaminated Site Using EH-/PH-Controlled Conditions (ENA)

2009 ◽  
Vol 71-73 ◽  
pp. 717-720
Author(s):  
P. Harborth ◽  
M. Thieme ◽  
K. Fricke
Keyword(s):  
Field Studies ◽  
Contaminated Site ◽  
H2o2 Treatment ◽  
Iron Cyanide ◽  
Controlled Conditions ◽  
In Situ Conditions ◽  
Cyanide Complexes ◽  
First Time ◽  
Ph Controlled

In the course of remedial investigations for a former gasworks site, high cyanide pollution of the soil (74.6 - 101.7 mg/kgDS total cyanide) and of the groundwater (3,840 µg/l total cyanide /approx. 300 µg/l free cyanides) were particularly problematic. Extensive investigations in the laboratory as well as in field studies finally resulted in a 2-step oxic/anoxic concept. Both the free cyanides as well as the complex bound cyanides could be biodegraded at more than 90% through a combination of H2O2-treatment (ISCO) and denitrification by in situ conditions. Furthermore a destruction of the iron cyanide complexes under fermentative conditions could be observed for the first time.

scholarly journals AdTurtle: An Advanced Turtle Trading System

2019 ◽  
Vol 12 (2) ◽  
pp. 96 ◽  
Author(s):  
Dimitrios Vezeris ◽  
Ioannis Karkanis ◽  
Themistoklis Kyrgos
Keyword(s):  
Historical Data ◽  
Exclusion Zone ◽  
Trading System ◽  
Controlled Conditions ◽  
Stop Loss ◽  
Opening And Closing ◽  
First Time

For this research, we implemented a trading system based on the Turtle rules and examined its efficiency when trading selected assets from the Forex, Metals, Commodities, Energy and Cryptocurrency Markets using historical data. Afterwards, we enhanced our Turtle-based trading system with additional conditions for opening a new position. Specifically, we added an exclusion zone based on the ATR indicator, in order to have controlled conditions for opening a new position after a stop loss signal was triggered. Thus, AdTurtle was developed, a Turtle trading system with advanced algorithms of opening and closing positions. To the best of our knowledge, for the first time this variation of the Turtle trading system has been developed and examined.

scholarly journals The effect of Trichoderma isolates, from family mushroom growing farms, on the yield of four Agaricus bisporus (Lange) Imbach strains

2014 ◽  
Vol 54 (1) ◽  
pp. 102-105 ◽  
Author(s):  
Romuald Górski ◽  
Krzysztof Sobieralski ◽  
Marek Siwulski ◽  
Barbara Frąszczak ◽  
Iwona Sas-Golak
Keyword(s):  
Agaricus Bisporus ◽  
Button Mushroom ◽  
Trichoderma Species ◽  
Controlled Conditions ◽  
Cultivation Substrate ◽  
First Time ◽  
Trichoderma Isolates

Abstract The effect of different Trichoderma species on the yield of Agaricus bisporus strains was investigated in this study. For the first time, the effect of different Trichoderma species on the yield of Agaricus bisporus strains was determined under fully controlled conditions. Four button mushroom strains were used: Somycel 53, Somycel 11, Amycel 2200, and Polmycel 31. The cultivation substrate was inoculated with the following Trichoderma species: T. aggressivum f. europaeum, T. atroviride, T. hamatum, T. harzianum, T. inhamatum, T. koningii, and T. longibrachiatum. Except for T. atroviride, all the Trichoderma isolates reduced the yield of the button mushroom strains.

Description of the puparium of Hermetia pulchra (Diptera: Stratiomyidae) from Brazil

Zootaxa ◽  
2016 ◽  
Vol 4205 (4) ◽  
pp. 357 ◽  
Author(s):  
JOSÉ ROBERTO PUJOL-LUZ ◽  
FABIO SIQUEIRA PITALUGA DE GODOI ◽  
KARINE BRENDA BARROS-CORDEIRO
Keyword(s):  
Adult Female ◽  
Single Specimen ◽  
Controlled Conditions ◽  
Brazilian Species ◽  
Distrito Federal ◽  
First Time

The puparium of Hermetia pulchra is described, based on a single specimen reared in laboratory under controlled conditions until the emergence of an adult female. The puparium of H. pulchra was compared with puparium of H. illucens and some differential features were indicated. A checklist of the Brazilian species of the genus Hermetia is included, with new distributional records for H. pulchra in the Brazilian States of Bahia and Distrito Federal. Hermetia sphecodes is recorded for the first time for Brazil (State of Amazonas). 

Reproduction of the round goby (Neogobius melanostomus) under controlled conditions

2018 ◽  
Vol 33 (1) ◽  
pp. 27-40
Author(s):  
Tomasz Kuczyński
Keyword(s):  
Round Goby ◽  
Neogobius Melanostomus ◽  
The Other ◽  
Seasonal Reproduction ◽  
Fish Reproduction ◽  
Artificial Reproduction ◽  
Learning Mechanisms ◽  
Controlled Conditions ◽  
Reproduction Method ◽  
First Time

Learning mechanisms determining fish reproduction are particularly beneficial in the case of experimental work on juvenile forms of fish making research independent of the season of the year. This paper describes the reproduction method of the round goby, Neogobius melanostomus, under controlled conditions. This species is not native to the ichthyofauna of the Gulf of Gdańsk and was discovered here for the first time in 1990. In the case of pre-seasonal reproduction of the round goby, the first spawning took place 5 weeks after the beginning of thermal stimulation. On the other hand, artificial reproduction of the fish caught in the spring was possible after only a week of being kept in a temperature of 17-19°C. The spawn incubation period ranged from 17 to 22 days, depending on the temperature. For natural spawning, the period from spawning to hatching was 18-19 days, at a constant temperature of 20°C.

scholarly journals Evaluation of tolerance to Fusarium oxysporum and Fusarium solani in Virginia-type tobacco (Nicotiana tabacum L.) varieties under controlled conditions in Northwestern Argentina

2021 ◽  
Vol 53 (2) ◽  
pp. 214-224
Author(s):  
Lorena A. Berruezo ◽  
Eleonora M. Harries ◽  
Marta Z. Galván ◽  
Sebastian A. Stenglein ◽  
Guadalupe Mercado Cárdenas
Keyword(s):  
Nicotiana Tabacum ◽  
Root Rot ◽  
Logistic Models ◽  
Root Rots ◽  
Controlled Conditions ◽  
Nicotiana Tabacum L ◽  
Northwestern Region ◽  
The Mean ◽  
First Time ◽  
Time Information

The production of tobacco (Nicotiana tabacum L.) in Argentina is centered in the northwestern region (NWA), where the incidence of root rots and stem diseases caused by Fusarium spp. has increased considerably in recent years. This study aimed to evaluate the pathogenicity levels of isolates of the F. oxysporum and F. solani complexes in different varieties of Virginia Type tobacco. The commercial varieties MB47, PVH229, NC71, K346, K326, and K394 were inoculated with six isolates of both complexes. The variables evaluated were the incidence and severity of the symptoms. The area under the disease progress curves (AUDPC) was calculated and subjected to analysis of variance (ANOVA). Also, disease epidemiological models were fitted to the experimental data. The MB47 variety was significantly less infected and the varieties K346, K326, and K394 had the highest AUDPC means, showing susceptibility to the isolates. The disease intensity curves were adequately described by the monomolecular and logistic models. The results provide, for the first time, information about the levels of tolerance to vascular wilt and root rot under controlled conditions for the main varieties of Virginia-type tobacco grown in NWA. Highlights: FOSC isolates produced mainly wilting, chlorosis, and growth reduction in tobacco plants; in contrast, FSSC isolates caused root rot, with characteristic necrotic lesions and root rot symptoms. The highest DSI scores were registered for Fo27 and Fo15, while the lowest DSI score was found for Fs98. The results obtained from the DSI scores were related to the mean AUDPC values of the isolates. MB47 and NC71 were significantly less infected than the other varieties, which registered low AUDPC values.

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