Results 51 to 60 of about 238,208 (246)
AIA Avances en Investigación AgropecuariaIntroducción. El maíz es un cultivo susceptible a la competencia por malezas que afectan significativamente su rendimiento (Cerrudo et al., 2012). La atrazina es el herbicida más utilizado en el control de estas malezas en maíz (Norsworthy et al., 2021).
Azul Josette Barrera-Aguirre +2 more
doaj +1 more source
Sensors, 2018 The present paper describes the experimentation in a controlled environment and a real environment using different photosensors, such as infrared light emitting diode (IRLED-as receiver), photodiode, light dependent resistor (LDR), and blue LED for the ...
Wendy Flores-Fuentes +5 more
doaj +1 more source
The status of the Pacific sardine resource and its management [PDF]
, 1973 The Pacific sardine fishery has declined from a catch of almost 8 hundred-thousand tons in the nineteen thirties to relative insignificance at present. This decline was primarily due to the decline of the northern subpopulation.
Haugen, Charles W.
core
Discordance Between Mitochondrial and Nuclear Contact Zones Within Antelope Ground Squirrels (Ammospermophilus) [PDF]
, 2020 A common biogeographic pattern found in many co-distributed species along the Baja California peninsula is the genetic divergence in the Vizcaíno Desert.
Gray, Shannon
core
Geofísica Internacional, 1972 Entre las diferentes actividades y estudios que se desarrollan en el Instituto de lngeniería de la Universidad Nacional Autónoma de México, con objeto de aplicarlos en las construcciones resistentes a temblor, está la determinación de diseño y coeficientes sísmicos que comprende un amplio programa de regionalización sísmica de México, el cual considera
openaire +3 more sources
Geographic risks to functional groups of mammals and birds from habitat loss in Mexico
Conservation Biology, EarlyView.Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás +4 more
wiley +1 more source
The Western North American Genus Androlyperus Crotch, 1873 (Coleoptera: Chrysomelidae: Galerucinae) [PDF]
, 1999 The five previously known species of Androlyperus are redescribed and diagnosed. Androlyperus nataliae n. sp. is described from the Baja California Peninsula, Mexico.
Clark, Shawn M.
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Using Catch Data to Estimate Changes in Global Commercial Abalone Abundance
Fisheries Management and Ecology, EarlyView.ABSTRACT Changes in global wild capture production of abalone are explored to infer potential changes in biological stocks. The study found that 77% (or 10 out of the 13) of the countries that reportedly caught abalone in the wild have experienced declines in catches between 1980 and 2023, and on aggregate catch declined by almost 83% between 1980 and ...
Douglas Crookes
wiley +1 more source
The Flies of Western North America. F.R. Cole, with the collaboration of Evert I. Schlinger. Berkeley and Los Angeles: University of California Press, 1969. xi, 693 pp. $25.00. [PDF]
, 2017 Excerpt: Knowing of the excellence of the author\u27s work especially as an artist of Diptera, entomologists have been waiting for this much-needed volume since the completion of the first manuscript in 1932. The work deals with two-winged flies (Diptera)
Steyskal, George C.
core +3 more sources
Environmental Drivers of Jumbo Squid During Fishery Collapse in the Gulf of California (2019–2024)
Fisheries Oceanography, EarlyView.ABSTRACT The jumbo squid (Dosidicus gigas) is a cephalopod endemic to the eastern Pacific with significant ecological and economic importance. Its exploitation in the Gulf of California (GC) peaked in the 1990s, with catches exceeding 100,000 tons, but collapsed in 2009 and virtually disappeared by 2015, largely due to environmental changes and ...
Mario Vásquez‐Ortiz +5 more
wiley +1 more source