Temat: field population - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The effect of magnetic field on farmed populations of Helix aspersa O. F. Muller, 1774
Autorzy:: Ligaszewski, M.
Lysak, A.
Janas, P.
Mach-Paluszkiewicz, Z.
Powiązania:: https://bibliotekanauki.pl/articles/83555.pdf
Data publikacji:: 2011
Wydawca:: Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:: magnetic field
farmed population
Helix aspersa
Helix aspersa aspersa
Helix aspersa maxima
electromagnetic field
life cycle
snail
farming
Opis:: In order to assess the effect of alternating electromagnetic and direct magnetic field on adult Helix aspersa O. F. Müller and their eggs, adults and eggs of H. aspersa maxima Taylor and H. aspersa aspersa O. F. Müller were exposed to such fields with different parameters, and the following life cycle traits were observed: condition of hibernating adults, their survival rate during hibernation and reproduction, egg mass, hatching success, growth rate of hatchlings and body mass of next generation adults. Adults were exposed to sinusoidal, alternating electromagnetic fields of 50 Hz, 100 Hz and 200 μT, and magnetic induction of 50 Hz, as well as a field of 175 μT and 10–1000 Hz (repetition period 80 minutes). Egg batches were exposed to direct magnetic fields of magnetic induction 5 μT and 10 μT and alternating electromagnetic fields of analogous induction and frequency of 50 Hz. The effects varied depending on the parameters of the fields, subspecies and life cycle stage. Adult H. aspersa maxima was more sensitive to the changes in characteristics of electromagnetic field than H. aspersa aspersa, but the two subspecies showed a similar reaction to exposing their eggs to direct or alternating magnetic field. Probably direct field had a greater selection effect compared to alternating field, removing weaker genotypes at embryonic stage; this resulted in a greater mean body mass of the next generation adults. The results are preliminary; further studies, with further modifications of parameters of the fields applied are necessary.
Źródło:: Folia Malacologica; 2011, 19, 1
1506-7629
Pojawia się w:: Folia Malacologica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: An attempt at assessment of abundance of Helix pomatia L. in the field
Autorzy:: Kalinowski, T.
Jankowiak, A.
Rybska, E.
Napierala, A.
Bloszyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/83279.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:: abundance
Helix pomatia
field
Roman snail
distribution
Kujawsko-Pomorskie voivodship
animal population
inhabitant
population abundance
Źródło:: Folia Malacologica; 2012, 20, 1
1506-7629
Pojawia się w:: Folia Malacologica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: A semiclassical model for a laser field inside an optical cavity
Autorzy:: Priyashanka, K. M.
Wijewardena Gamalath, K. A. I. L.
Powiązania:: https://bibliotekanauki.pl/articles/1194053.pdf
Data publikacji:: 2015
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Semi classical theory
cavity electric field
population inversion
pump parameter
resonance frequency
threshold population
Opis:: Treating the laser medium quantum mechanically and the laser electric field classically, a mathematical model was developed to study a laser field inside a single mode optical cavity by numerical and analytical techniques. The simulations for threshold population, population inversion and average population with electric field frequency for 500 kHz resonance frequency of the atom are presented. The gain coefficient and the pump parameter with the frequency of the cavity electric field for 1000 kHz resonance frequency of the atom were simulated. The threshold population is a minimum when the frequency of electric field is equal to the resonance frequency of the atom. The population inversion varies sinusoidal with time and the frequency of the electric field and is a maximum at the threshold frequency of the atom. The saturated laser intensity at steady state increases linearly with the pump parameter and for larger values of the pump parameter, a smaller time is needed to reach the saturation of the laser field.
Źródło:: World Scientific News; 2015, 13; 65-79
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Field and Laboratory Studies of the Earthworm Dendrobaena Alpina
Autorzy:: Kostecka, J.
Butt, K. R.
Powiązania:: https://bibliotekanauki.pl/articles/124743.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: earthworms
Dendrobaena alpina
field study
laboratory culture
population dynamics
Opis:: Distribution of Dendrobaena alpina covers the mountainous region of central Europe, where it has a high dominance and frequency index. This work describes data from field studies conducted over two annual cycles in the Bieszczady National Park (BNP), Poland, in different types of beech forest. Densities of this species ranged from 47–231 g·m ^-2 with associated biomasses of 19–90 g·m ^-2. Most (66%) were recovered from less than 0.1 m soil depth with a further 28% from up to 0.2 m. Further, the animals were collected alive from Lutowiska, close to the BNP to obtain baseline data on the life history of D. alpina. Mature individuals were kept in isolation and cocoon production monitored on a 2 monthly basis. Immature individuals were kept until they reached maturity, when they were paired, with combined output of cocoons regularly monitored. Cocoons were collected, had their masses determined and were incubated. Hatchability was recorded, as was estimated duration of incubation and growth to maturity. Field-collected adults had a mean mass of 1.4 g and at 15 ºC, these produced an average of 1.83 cocoons·worm ^-1·month ^-1. Zero cocoons were produced by further specimens, collected as immature, grown to maturity and maintained in isolation. Recently-matured, paired D. alpina produced an average of 1.65 cocoons·worm ^-1·month ^-3. Cocoons had a mean mass of 19 mg. At 15 ºC, cocoons produced by recently matured adults hatched after 80 days (82% viable), but after 2 months the majority of cocoons failed to hatch. Hatchling growth from an average of 18 mg to maturity required 7–11 months in the given substrate.
Źródło:: Journal of Ecological Engineering; 2015, 16, 5; 213-217
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Detection of Setaria tundra microfilariae in mosquito populations from irrigated fields in Wroclaw (Poland)
Autorzy:: Rydzanicz, K.
Lonc, E.
Masny, A.
Golab, E.
Powiązania:: https://bibliotekanauki.pl/articles/5818.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Parazytologiczne
Tematy:: detection
Setaria tundra
microfilaria
filariasis
mosquito
animal population
irrigated field
Wroclaw city
Polska
Źródło:: Annals of Parasitology; 2016, 62, Suppl.
0043-5163
Pojawia się w:: Annals of Parasitology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Detoxifying enzyme studies on cotton leafhopper, Amrasca biguttula biguttula (Ishida), resistance to neonicotinoid insecticides in field populations in Karnataka, India
Autorzy:: Halappa, B.
Patil, R.K.
Powiązania:: https://bibliotekanauki.pl/articles/65885.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: detoxifying enzyme
cotton leafhopper
cotton
Gossypium
Amrasca biguttula biguttula
resistance
neonicotinoid
bioassay
glutathione S-transferase
insecticide
field population
Karnataka state
India
Opis:: The cotton leafhopper (Amrasca biguttula biguttula Ishida) is considered to be an alarming insect pest causing both quantitative and qualitative loss in cotton. In situ bioassay studies were done and the role of detoxifying enzymes in conferring resistance to neonicotinoid groups of insecticides in low (MUD), medium (DVG), high (HVR) and very high (GLB) pesticide usage areas of Karnataka were determined. Bioassay studies showed that imidacloprid, thiamethoxam, acetamiprid, thiacloprid and clothianidin registered varying levels of resistance for all the locations studied. The resistance ratio was high in imidacloprid (3.35, 8.57, 9.15 and 12.27 fold respectively) and the lowest in dinoferuran (1.86, 5.13, 6.71 and 9.88 fold respectively). Furthermore, the enzyme activity ratio (glutathione-S-transferase) was relatively greater, and corresponded to the higher LC50 values of neonicotinoids for very high, high, medium and low pesticide usage areas. Our study suggested that the higher activity of the detoxifying enzyme in the resistance population of cotton leafhopper apparently has a significant role in endowing resistance to neonicotinoid groups of insecticides. However, this study recommends using neonicotinoids in cotton growing areas with caution.
Źródło:: Journal of Plant Protection Research; 2016, 56, 4
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Multiple resistance to acetolactate synthase (ALS)- and acetyl-coenzyme A carboxylase (ACCase)-inhibiting herbicides in black-grass (Alopecurus myosuroides Huds.) populations from Poland
Autorzy:: Adamczewski, K.
Kierzek, R.
Matysiak, K.
Powiązania:: https://bibliotekanauki.pl/articles/66126.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: multiple resistance
acetolactate synthase
acetyl-coenzyme A carboxylase zob.acetyl-CoA carboxylase
acetyl-CoA carboxylase
herbicide
black-grass
Alopecurus myosuroides
annual grass
weed
cultivated field
waste land
slender meadow foxtail zob.black-grass
twitch grass zob.black-grass
black twitch zob.black-grass
population
Polska
Opis:: Alopecurus myosuroides seeds were sampled from 32 winter wheat fields from 2010 to 2014. Resistance to herbicides was detected in 17 A. myosuroides populations. In addition to single resistance to herbicides, cross-resistance and multiple resistance to acetolactate synthase (ALS)- and acetyl-coenzyme A carboxylase (ACCase)-inhibiting herbicides were found. Application of sulfometuron and imazapyr was unable to control some of the resistant biotypes in this study. This result implies that resistance in these populations is due to a target site mechanism. The A. myosuroides biotypes resistant to ACCase-inhibiting herbicides varied in their responses to derivatives of aryloxy-phenoxy-propionic acid (FOPs), cyclohexanediones (DIMs) and phenylpyrazolines (DENs). Resistant biotypes of A. myosuroides that could not be controlled with fenoxaprop-P-ethyl (FOP) and pinoxaden (DEN) were controlled with clethodim (DIM).
Źródło:: Journal of Plant Protection Research; 2016, 56, 4
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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