scholarly journals Sobre la ecología reproductiva de Nicotiana glauca Grah: una maleza de distribución cosmopolita

2017 ◽  
pp. 47
Author(s):  
Hector Manuel Hernández
Keyword(s):  
Feeding Strategies ◽  
Flowering Period ◽  
American Continent ◽  
Nicotiana Glauca ◽  
Seasonal Movements ◽  
Alternative Sources ◽  
Reproductive Events ◽  
Present Pattern ◽  
Trap Line ◽  
Pollen Flux

Reproductive events of Nicotiana glauca Grah. from the Pedregal de San Angel (SW of Cuenca del Valle de México, México) were studied. The species is esencially ornitophilous because it is visited by several hummingbird species (fam. Trochilidae) in the american continent, while in Africa and Asia is visited by sunbirds (fam . Nectariniidae) and honeyeaters (fam . Meliphagidae) respectively. N . glauca is highly beneficia! to the hummingbird populations in the Pedregal de San Angel because of its long flowering period and large amount of nectar produced; it is specially notorious where are not alternative sources of food. Introduced recently in Mexico, N. glauca has played an important role on the ecology, and particulary on the seasonal movements of  hummingbirds. Both, trap-line and territoriality, are feeding stategies founded in the four hummingbird species identified in the Pedregal de San Angel; these feeding strategies have implications in the pollen flux between individuals of N. glauca. At this respect, the role played by the ilegitimate visitors is discussed. Experimental techniques carried out to know the breeding system showed that N. glauca is self-compatible and able to self-pollination, which is an important feature in its success as a colonizing species. Finally, three different dispersal mechanisms are described, and its importance in the present pattern of distribution of the species is discussed.

Man on the American Continent

1880 ◽  
Vol 10 (241supp) ◽  
pp. 3836-3837
Keyword(s):  
American Continent

Distribution, seasonal movements and habitat utilisation of an endangered shark, Glyphis glyphis, from northern Australia

2017 ◽  
Vol 573 ◽  
pp. 203-213 ◽  
Author(s):  
BJ Lyon ◽  
RG Dwyer ◽  
RD Pillans ◽  
HA Campbell ◽  
CE Franklin
Keyword(s):  
Northern Australia ◽  
Seasonal Movements

PERSPECTIVE DEVELOPMENT OF WORLD PRODUCTION OF FEEDS FOR AQUACULTURE: ALTERNATIVE SOURCES OF RAW MATERIALS

2017 ◽  
pp. 67-78
Author(s):  
Lina Yurievna Lagutkina
Keyword(s):  
Raw Materials ◽  
Limiting Factors ◽  
Current Status ◽  
Feed Production ◽  
The World ◽  
Market Trends ◽  
Alternative Sources ◽  
World Industry ◽  
First Time ◽  
A Current

The author of the article discloses the prospects of development of the world feed production for aquaculture based on the analysis of key innovative technological and market trends. The author specifies that shortage, high cost, low ecological compatibility of traditional raw materials - fish flour - are among major limiting factors in the development of production of feeds for aquaculture. This fact, in turn, limits sustainable development of aquaculture both in Russia, and in the world in general. The article presents the overview of a current status of the world industry of feed production in aquaculture, where the regional situation is studied, as well. For the first time, there is given the outlook of innovative technologies in feed production based on the alternative sources of protein (on the example of projects of leading aquabiotechnological companies) which will determine industry’s objectives for the mid-term perspective.

Profitability of dairy farming in relation to the type of feeding system

2011 ◽  
Vol 28 (1) ◽  
pp. 55-59 ◽  
Author(s):  
Jan Frelich ◽  
Martin Šlachta ◽  
František Střeleček ◽  
Jana Lososová
Keyword(s):  
Arable Land ◽  
Principal Component ◽  
Dairy Farming ◽  
Plant Production ◽  
Feeding Strategies ◽  
Feeding System ◽  
Financial Health ◽  
Profit Rate ◽  
Permanent Housing ◽  
Cow Performance

Profitability of dairy farming in relation to the type of feeding systemWe investigated the profitability of dairy farms in relation to the type of feeding system (seasonal pasture vs. permanent housing). An economic analysis was carried out of data on the structure and financial health of 50 farms in 2007 using questionnaires filled in by the farmers. The Principal Component Analysis (PCA) was applied to reveal causal relationships between a number of characteristics of the farms. The two axis of PCA explained 40.48% and 16.13% of the variability among the selected farm characteristics. Profitability related more to the number of subsidies, the area of arable land, the number of livestock and to the milk and plant production than to the area of meadows and pastures. Although a better cow performance was achieved on farms with confined herds, the profit per agricultural area and profit rate did not differ significantly between the two feeding strategies (P>0.05). The profit was 3,259 and 3,655 CZK/ha on average and the profit rate 7.9% and 5.6% on average on farms with pastured herds and on farms with confined herds, respectively. A lowering of input costs and a more effective utilisation of grasslands may further enhance profitability.

Implementation of alternative sources of energy on the territory of the Khanty-Mansiysk autonomous district

2019 ◽  
pp. 134-136
Author(s):  
I.V. Nasyrova ◽  
◽  
A.M. Askarova ◽  
R.M. Khaziakhmetov ◽  
◽  
...  
Keyword(s):  
Autonomous District ◽  
Alternative Sources

Feeding strategies for managing heat load in feedlot cattle

2002 ◽  
Vol 80 (9) ◽  
pp. 2373 ◽  
Author(s):  
T. L. Mader ◽  
S. M. Holt ◽  
G. L. Hahn ◽  
M. S. Davis ◽  
D. E. Spiers
Keyword(s):  
Heat Load ◽  
Feedlot Cattle ◽  
Feeding Strategies

Application of glauconite in agriculture

2018 ◽  
Vol 2 (95) ◽  
pp. 73-77
Author(s):  
O.V. Khodakovska ◽  
S.G. Korchinska ◽  
A.P. Matvienko ◽  
V.V. Prokofiev
Keyword(s):  
Alternative Sources ◽  
Effective Use

Basic problems are lighted up, stipulating the decline of level of fertility of soils, in particular increasing deficit  of nutritives. The ways of their decision offer. The effective use is reasonable in agriculture of alternative sources of addition to soils nutritives, namely application present in Ukraine, glauconite as fertilizer.

On the diagnostics of Adonis L. species (Ranunculaceae) of the Russian flora

2020 ◽  
pp. 3-14
Author(s):  
Aleksandr Luferov
Keyword(s):  
Raw Materials ◽  
Natural Populations ◽  
Structural Features ◽  
Biologically Active ◽  
Scientific Medicine ◽  
Diagnostic Features ◽  
Plant Raw Materials ◽  
Similar Chemical ◽  
Chemical Studies ◽  
Alternative Sources

The article provides brief information about cardiotonic, sedative, cytostatic, diuretic, and antibacterial effects of biologically active compounds of Adonis L. (Ranunculaceae) species. Chemical studies allowed to identify the cardiac glycosides, or cardenolides: or cardenolides: adontoxin, adonitol, adonitoxigenin, acetyldigitoxin and others. In scientific medicine, it is currently allowed to use Adonis vernalis L. Other types of Adonis have a similar chemical composition and are offered as substitutes for this official species, for example, Adonis apennina L. Many Adonis species have limited natural resources, and in some regions are rare, requiring conservation of their natural populations. The search for alternative sources of medicinal plant raw materials, based on this, is relevant. The experimental part of our research was carried out using the morphological and geographical method with the involvement of information on ecology and phenology. For the first time summarizes the diagnostic features of Adonis flora of Russian flora. Previously unknown structural features (shape and size of anthers) were identified that characterize the subgenera Adonanthe and Adonis. Taxonomic study of the genus Adonis of the Russian flora allowed us to determine its species composition, clarify its systematic affiliation, and nomenclature synonyms. 9 species were identified. Of these, 6 are perennials belonging to the subgenus Adonanthe, section Consiligo, which includes 2 subsections: Amurenses (2 species) and Vernales, which is differentiated into 2 rows: Apenninae (2 species) and Vernales (2 species). Subgenus Adonis is represented by 2 sections: Adonis (1 species) and Lophocarpa with sections Aestivales (1 species) and Dentatae (1 species). For all the considered species and varieties, the main distribution areas are given. A key has been compiled to determine the wild Adonis species distributed in Russia.

Features of Integration and Metaintegration in American Region

2019 ◽  
pp. 58-64
Keyword(s):  
Integration Method ◽  
South American ◽  
Legal Systems ◽  
Policy Integration ◽  
American Continent ◽  
Member States ◽  
The Creation ◽  
South American Continent ◽  
Andean Community ◽  
American Region

The analysis of integration of the legal systems of states in the American region is held. In the Southern subregion, a combination of integration and disintegration in cooperation of states led to the creation of two integration entities – MERCOSUR and the Andean Community (AC), in the Northern subregion – NAFTA. The author concludes that the convergence on the American continent, especially using the integration method, helped to implement a special scenario in the southern part of this continent – the meta-integration scenario, with the creation of the Union of South American Nations, uniting the Andean Community and MERCOSUR – something resembling a European one, but at the same time different from it. UNASUR is an effective mechanism for bringing together and integrating the states of the South American continent. Within this Union with notable leadership of Brazil and Argentina the first steps in the direction of the foreign policy integration of the member states are traced. In terms of economic integration, the Union uses the achievements of the AC and MERCOSUR, unifying the legal regulators in the economic sphere and bringing rapprochement to the legal systems of the member states.

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