Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 6

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  survival strategy
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
1

Key survival strategies of the Sawadaea tulasnei parasite on its Acer platanoides host under conditions of varied anthropopression

100%
Sucharzewska E.
Polish Journal of Environmental Studies
|
2010
|
tom 19
|
nr 5
This study investigates the development cycle of Sawadaea tulasnei on Acer platanoides in urban conditions, taking into account the effect of traffic-induced pollution. Observations were taken at 63 stations in the city of Olsztyn and surroundings, located alongside major communication routes at distances of up to 50 m, 100 m, and 300 m with distances >300 m acting as control. S. tulasnei appeared in each experimental year. The highest mean pathological index that was statistically significant was recorded at stations located up to 50 m from the routes and the lowest at the control stations. Differences were observed in the incidence of S. tulasnei depending on the maturity of the host plant, whereas the development of the parasite was seen to be undisrupted. In the zone of up to 50 m, fruiting bodies matured earlier compared to controls, suggesting environmental stress.
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Multidimensional comparative analysis of other gainful activities of agricultural holdings in EU countries

84%
Krakowiak-Bal A.
Infrastruktura i Ekologia Terenów Wiejskich
|
2009
|
nr 07
Over the past few years, diversification and pluriactivity of farmers and farming households has been increasing in EU-27countries. But the type of diversification activity encouraged, as well as their scale, appears to be very different across the EU. Therefore the analysis of spatial diversification of other gainful activity of farm households in EU countries is the main purpose of this paper. 27 UE countries described with 9 variables relating to the non-agricultural activity of farms are the analysed objects. The carried survey helps to show spatial disparities and to discriminate groups of countries with a similar farmers non-agricultural activity. There were used chosen methods of multidimensional comparative analysis which enable clustering the multicriterial objects: Czekanowskis diagram, Wards method, and k-mean algorithm. As a final result there were formed 5 clusters with countries about similar level of farm diversification. It may be stated, that a development of diversification of agricultural holdings is correlated with a spatial arrangement. Neighbouring countries belong to the same clusters of other gainful activity kinds.
3

Field and laboratory studies of encysted and trophic stages of naked amoebae: including a perspective on population life cycle dynamics

84%
Anderson O. R.
Acta Protozoologica
|
2010
|
tom 49
|
nr 1
1-8
4

Migration in response to the urban environment: out-migration by middle-class women and their families from Mexico City after 1985

84%
Izazola H., Marquette C. M.
Geographia Polonica
|
1995
|
tom 64
5

Survival strategies and seasonal size variations of feather mites Proctophyllodes megaphyllus on their host alpine accentor Prunella collaris

67%
Marcanova N., Janiga M.
Polish Journal of Ecology
|
2021
|
tom 69
|
nr 1
6

Larval survival strategy during winter of Chordodes nobilii Camerano, 1901 [Gordiida, Nematomorpha]

67%
Zanca F., De Villalobos C., Rumi A.
Acta Parasitologica
|
2007
|
tom 52
|
nr 4
There are numerous open questions concerning the life cycle of Gordiida (Nematomorpha), especially about egg development and viability of larvae during winter, when the temperature of freshwater environments where they inhabit is low. On the basis of experimental studies we demonstrate that egg development of Chordodes nobilii takes 20–25 days at 22°C and 45–55 days at 5°C. We also observed that larvae of C. nobilii obtained from egg strings at 5°C and maintained at that temperature during six months remained inside their egg shells as a survival strategy.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.