Distribution and Seasonal Abundance of Freshwater Snails in Some Egyptian Water Courses

2017 ◽  
Vol 47 (3) ◽  
pp. 541-548 ◽  
Author(s):  
Hanaa M. M. El-Khayat ◽  
Kadria M. A. Mahmoud ◽  
Sara S. M. Sayed
Keyword(s):  
Seasonal Abundance ◽  
Freshwater Snails ◽  
Water Courses

scholarly journals Bioaccumulation of heavy metals in freshwater snails in relation to lining of water courses in Egypt.

2016 ◽  
Vol 2 (8) ◽  
pp. 561-573 ◽  
Author(s):  
Ahmed Abdel Kader ◽  
Nahed M.M. Ismail ◽  
Asmaa Abdel-motleb ◽  
Gamalat Y. Osman ◽  
Azza H. Mohamed ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Freshwater Snails ◽  
Water Courses

STUDY ON DIVERSITY AND DISTRIBUTION OF ANTS (HYMENOPTERA: FORMICIDAE) IN URBAN AND PERIURBAN AREAS OF AURANGABAD CITY, MAHARASHTRA, INDIA

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
S. D. CHATE ◽  
R. J. CHAVAN
Keyword(s):  
Rainy Season ◽  
Winter Season ◽  
Seasonal Abundance ◽  
Urban Region ◽  
Ant Community ◽  
Community Variation

The present study deals with the ant community variation in and around Aurangabad city. During the study total 16 species of ants belonging to twelve genera and four subfamilies were reported in eight habitat from urban and periurban regions. Abundance of ants was more in peri-urban region as compared to urban region. Subfamily myrmicinae was more dominant as compared to other subfamilies. Seasonal abundance of ants was seen to be more in winter season and less in rainy season.

Field survey on the freshwater snails in Cheju Province(Quelpart lsland), Korea: Especially on presence or not of Parafossarulus manchouricus

1964 ◽  
Vol 2 (3) ◽  
pp. 183 ◽  
Author(s):  
Suck Young Kang ◽  
In Kyu Loh ◽  
Yung Hoon Park ◽  
Byung Chan Kim ◽  
Too Bong Lim
Keyword(s):  
Field Survey ◽  
Freshwater Snails

Challenges of Aircraft and Drone Spray Applications

2020 ◽  
Vol 31 (2) ◽  
pp. 83-88 ◽  
Author(s):  
Fernando K. Carvalho ◽  
Rodolfo G. Chechetto ◽  
Alisson A. B. Mota ◽  
Ulisses R. Antuniassi
Keyword(s):  
Smallholder Farmers ◽  
Crop Protection ◽  
Crop Canopy ◽  
Target Species ◽  
Buffer Zones ◽  
Correct Dose ◽  
Knapsack Sprayer ◽  
Water Courses ◽  
Low Toxicity ◽  
Heavy Loads

Crop protection on major crops is now required to follow the principles of integrated pest management so the timing and accuracy of any application of a pesticide or biopesticide has to be more precise to minimize adverse effects on non-target species. The development of UAVs (unmanned aerial vehicles) provides a means of providing a more targeted application of the correct dose, especially by using formulations that are more persistent, thus minimizing loss of spray in areas subject to rain. Avoiding use of too high a dosage allows greater survival of natural enemies and reduces the selection pressure for pests becoming resistant to specific modes of action. The downward flow of air from a UAV should also provide better distribution and impaction of droplets within a crop canopy, reduce soil impaction caused by taking heavy loads of spray applied with 200 l ha–1 of water, and allow treatments when fields are too wet to access with ground equipment. In Asia, many smallholder farmers are using a drone in preference to using a knapsack sprayer. According to Matthews, it has been shown that ULV spraying can be effective, but it needs a narrow droplet spectrum with the droplets remaining stable and not shrinking to become too small. Formulation research can reduce the volatility of the spray, hence the success of oil-based sprays. However, instead of petroleum-based oils, there is a chance to develop vegetable oil carriers with micro-sized particle suspensions to deliver low toxicity pesticides in droplets that can be deposited within the crop and not drift beyond the crop boundary. Oil deposits will be less prone to loss after rain so less should be lost in neighbouring ditches and water courses, especially as rainfall patterns are forecast to change. More studies are needed to evaluate the swath for deposition, buffer zones, formulation, nozzle selection, to guide future specific legislation for UAV applications.

Seasonal Abundance and Site Fidelity of Bottlenose Dolphins (Tursiops truncatus) in Mississippi Sound

2004 ◽  
Vol 30 (2) ◽  
pp. 299-310 ◽  
Author(s):  
Carrie W. Hubard ◽  
Kathy Maze-Foley ◽  
Keith D. Mullin ◽  
William W. Schroeder
Keyword(s):  
Tursiops Truncatus ◽  
Site Fidelity ◽  
Bottlenose Dolphins ◽  
Seasonal Abundance ◽  
Mississippi Sound
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