Wyniki wyszukiwania - AGRO

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Thermal differentiation of winters in the Carpathian Mountains altitudinal profile during the period 1961-62 - 1990-91

100%

Piotrowicz K.

Geographia Polonica

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1997

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tom 70

2

Characteristics of the winter phytoplankton in Rogozno Lake

100%

Mencfel R., Pasztaleniec A.

Annales Universitatis Mariae Curie-Sklodowska. Sectio C, Biologia

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2004

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tom 59

3

Microbial air contamination in poultry houses in the summer and winter

86%

Wojcik A., Chorazy L., Mituniewicz T., Witkowska D., Iwanczuk-Czernik K., Sowinska J.

Polish Journal of Environmental Studies

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2010

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tom 19

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nr 5

The aim of the present study was to evaluate the degree of microbial air contamination in three laboratory rooms designed for raising broiler chickens under identical conditions, in the summer and winter. It was found that in identical poultry houses and under identical management conditions, certain differences can be observed with regard to temperature and humidity parameters and the degree of microbial air contamination, both in the summer and winter. The concentrations of aerobic mesophilic bacteria and fungi were higher in the winter than in the summer in all rooms. Various levels of microbial air contamination had no effect on broiler production results.

4

Sad przydomowy zima

86%

Barton R.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

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1995

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nr 12

5

Characterization of fatty acid composition in Eurasian badger [Meles meles]

86%

Zalewski K., Martysiak-Zurowska D., Iwaniuk M., Nitkiewicz B., Stolyhwo A.

Polish Journal of Environmental Studies

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2007

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tom 16

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nr 4

645-650

Polyunsaturated fatty acids (PUFAs, LA and ALA) are not synthesized in mammals in the absence of their essential fatty acid precursors. However, hibernating animals and animals sleeping through the winter need sufficiently high amounts of these acids. The Eurasian badger does not hibernate, but sleeps over winter. In the autumn the body weight of adult badgers increases even twofold, since they put on fat before the winter. Fat is deposited primarily in the subcutaneous layer of adipose tissue, and much less commonly in the muscles, liver and around the intestines. The percentage composition of fatty acids (Saturated fatty acids-SFAs, monounsaturated fatty acids-MUFAs, PUFAs) is different in particular types of tissue. The lipids isolated from depot adipose tissues (suet, subcutaneous, perirenal, periintestinal fat) are dominated by monounsaturated fatty acids (on average 41.25%), followed by saturated fatty acids (33.53%). Polyunsaturated FAs have the lowest proportion in this groups of tissues, on average 17.75% of total FAs. On the other hand, liver lipids contain over 44% PUFAs. The fatty acid composition of lipids in badgers tissue includes considerable quantities of essential unsaturated n-6 and n-3 fatty acids of great pharmacological significance.

6

Scent marking in Eurasian beaver Castor fiber during winter

86%

Rosell F., Bergan F.

Acta Theriologica

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2000

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tom 45

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nr 2

The Eurasian beaver Castor fiber Linnaeus, 1758 deposit castor fluid (castoreum) and/or anal gland secretion at scent mounds in their territory year round. We investigated the hypothesis that during winter Eurasian beavers may intensify use of scent, in year round ice-free water systems, during the breeding season. This study showed that the median number of scent marks in 7 territories increased significant ly in the breeding (January-March 1996}, compared to the nonbreeding portion of winter (October- -Decemher 1995), which is consistent with our prediction. The median number of scent marks was significantly higher during February, compared to January and March. This may be due to females approaching or being in oestrous in our study area during February. Further studies are, however, needed to clarify how information in scent marks are coded and transmitted during the breeding season.

7

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Circulation and winter deep-water formation in the Northern Red Sea

86%

Manasrah R., Badran M., Lass H. U., Fennel W.

Oceanologia

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2004

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tom 46

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nr 1

Water mass characteristics and circulation patterns in the Gulf of Aqaba and northern Red Sea were studied for the first time during the r/v ‘Meteor’ cruise leg 44/2 from February 21st to March 7th 1999 using temperature-salinity profiles and current observations. The deep water in the northern Red Sea had similar characteristics to the well-mixed upper 450 m of water in the Gulf of Aqaba. This indicates that the winter mixed waters of the Gulf of Aqaba contribute significantly to deep-water in the northern Red Sea. Mixing in the Gulf of Aqaba is an annually repeated event that starts with the cooling of the surface water during November–December and reaches a maximum, which in most years extends down the entire water column in March–April. Waters deeper than the mixed layer in the Gulf seems to be rather passive and play no specific role in water mass formation in the northern Red Sea. In contrast to the Gulf of Aqaba, the upper 200 m of the northern Red Sea were stratified (21.5–23.5◦C, and 40.0–40.3 PSU). Stratification at the Strait of Tiran was weak (21.6–22.0◦C, and 40.3–40.5 PSU) and disappeared abruptly in the Gulf of Aqaba (21.4–21.6◦C, and 40.6–40.7 PSU). A well-developed cyclonic gyre with a diameter of about 50–60 km and maximum velocity of about 0.4 m s−1 was observed in the stratified upper 200 m of the northern Red Sea waters. The gyre may contribute to the preconditioning for intermediate water formation in the northern Red Sea.

8

Cyclomorphosis affecting sensillary structures in Isotoma tshernovi Martynova, 1974 [Isotoma nanseni Fjellberg, 1978, syn.nov.] [Collembola, Isotomidae]

86%

Fjellberg A.

Polskie Pismo Entomologiczne

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1995

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tom 64

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nr 1-4

9

Thermal characterization of winters in the 20th century in Krakow

86%

Piotrowicz K.

Geographia Polonica

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1996

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tom 67

10

Why are shrews so small? The costs and benefits of small size in Northern temperate Sorex species in the context of foraging habits and prey supply

86%

Churchfield S.

Acta Theriologica. Supplement

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2002

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tom 47

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nr 1

This paper reviews the ecological advantages and disadvantages of very small body size in Sorex Linnaeus, 1758 shrews living at high latitudes with cold winters. It examines the feeding and foraging habits of small and large shrews in the context of prey supply, location of winter prey sources, territory requirements, habitat exploitation and inter-specific competition. Data on feeding habits and prey availability show that the major costs of small size are a reduction in food niche breadth and prey biomass resulting from restrictions on the type and size of prey eaten, and large territory requirements. Major benefits of small size are the ability to subsist on small, numerous and accessible arthropods with high encounter rates, enabling coexistence with larger congeners and exploitation of low-productivity habitats less suitable for larger earthworm-eating species. Small size, coupled with low per capita food intake, is shown to be of special adaptive value in cold winters when food supply is restricted mostly to small arthropods, and earthworms are few.

11

The physiological status of the alimentary canal in honey bees during winter

86%

Chorbinski P., Tomaszewska B.

Pszczelnicze Zeszyty Naukowe

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1998

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tom 42

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nr 2

12

Winter circadian activity pattern of free-ranging coypus in the Parana River Delta, eastern Argentina

86%

Palomares F., Bo R., Beltran J. F., Villafane G., Moreno S.

Acta Theriologica

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1994

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tom 39

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nr 1

During August 1990, 3 male and 3 female coypus Myocastor coypus (Molina, 1782) were radiotracked for 42 24-h periods at the Delta of Paraná River, Argentina. Coypus were mainly nocturnal, with activity peaks around one hour after sunset and two hours before sunrise. Movement rate peaked between 02.00 and 04.00 o'clock. This pattern is similar to that observed in captive individuals and introduced feral populations. Among 7 environmental factors (day period, temperature, wind, cloud cover, and presence or absence of moon, fog, and rain) only period of day and rainfall during daylight were found significantly related to coypu activity, but no environmental factor influenced coypu nocturnal rate of movement.

13

Effects of an exceptionally snowy winter on chamois survival

72%

Rughetti M., Toigo C., Von Hardenberg A., Rocchia E., Festa-Bianchet M.

Acta Theriologica

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2011

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tom 56

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nr 4

Although weather-induced mass mortalities of wild ungulates have been reported, no study has quantified how these episodes may affect the survival of prime-aged adults. Long-term studies of marked ungulates have instead consistently found very weak or no effects of weather on the survival of this age class, particularly for females. We report on the effects of the exceptionally snowy winter of 2008–2009 on three populations of chamois in the western Alps: two in Italy, one in France. In the Alpi Marittime Natural Park in Italy, mortality of prime-aged females (aged 2–9 years) was 43%, about five times higher than reported by previous studies of chamois. Just across the continental divide in the adjacent Mercantour National Park (PNM) in France, however, prime-aged female mortality was only 6%. Senescent females suffered very high mortality in both populations (100% and 56%). In the Gran Paradiso National Park in Italy and in the Alpi Marittime Natural Park, adult male mortality rate was respectively of 81% and 44%, whereas in the PNM, it was only 10%. A recent reduction in population density in the French population, or lower absolute snowfall than in Italy, may explain the difference in survival. Survival of males and prime-aged females can be affected by exceptional weather events, possibly in combination with high population density. Adult chamois of both sexes appeared to show elevated mortality in response to harsh winter conditions. Our results underline the importance of considering sex and age classes in evaluating the impacts of population density in wild ungulates.

14

Effect of selected agrotechnical factors on winter durum wheat yielding

72%

Chrzanowska-Drozdz B., Kotecki A., Bojarczuk J.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2009

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tom 12

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nr 3

15

Agriculture water use efficiency in Wadi Shu'eib area, Jordan

72%

Jiries A., Ta'any R., Abbassi B., Oroud I.

Polish Journal of Environmental Studies

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2010

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tom 19

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nr 2

337-341

Water percolation in upper soil at Wadi Shueib in Jordan was investigated using different irrigational methods and amounts of irrigation water. Four investigative periods were designed: two during the summer and two during the winter. The percentage of recharge from irrigated plots ranged from 42% to 78%, depending on the amount of irrigation water and the climatic conditions that prevailed in the investigated area. The main factor that controlled the amount of percolation was soil water content. Different methods of irrigation showed apparent variations in the amount of water losses. The covered fields (mulched and subsurface methods) had the lowest water consumption as compared to the uncovered plots (bare and meandering irrigational methods). This is mainly due to the reduction in surface evaporation from the topsoils. Accordingly, any improvement in water use efficiency should take this factor into consideration.

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