Results 61 to 70 of about 58,836 (235)

More new distribution records for Florida water beetles (Coleoptera: Dytiscidae, Elmidae, Hydrophilidae, Scirtidae), with additional notes on Scirtes oblongus Guérin-Méneville [PDF]

open access: yes, 2009
New distribution records for the State of Florida are given for several genera and species of water beetles. These include Dytiscidae: Acilius confusus Bergsten; Dytiscus carolinus Aubé; Matus bicarinatus (Say); Elmidae: Oulimnius nitidulus LeConte ...
Epler, John Hollinger
core   +2 more sources

fastbioclim: An R package for creating custom‐time bioclimatic and derived environmental summary variables

open access: yesMethods in Ecology and Evolution, EarlyView.
Abstract Bioclimatic variables, widely used in ecological and biogeographical studies, are typically derived from 30‐year averages of monthly data (e.g. 1971–2000). Unfortunately, the use of these long‐term averaged variables often creates a temporal mismatch with the observational data collected, which potentially undermines how environmental ...
Gonzalo E. Pinilla‐Buitrago   +1 more
wiley   +1 more source

The railway and legal challenges in southern Mexico: Campeche and Yucatán

open access: yesSortuz
In the second half of the 19th century, in the Yucatecan peninsula of Mexico, within the states of Campeche and Yucatan, railroads full of wagons filled with bales of the henequen plant mainly crossed.
Łukasz Czarnecki
doaj   +1 more source

Traditional and Geometric Morphometrics and Invariant Shape Descriptors of Catfish Otoliths in the Yucatán Peninsula: Tools for Species Identification and Individual Size Estimation at Maya Archaeological Sites

open access: yesArchaeometry, EarlyView.
ABSTRACT This study investigates the use of otolith shape analysis for species identification and size estimation in Ariopsis felis and Bagre marinus, based on 181 modern otoliths obtained from a scientific collection and recent sampling in the coastal regions of Campeche and Yucatán, as well as 39 archaeological otoliths corresponding to the Early ...
Ariana Solis‐Gómez   +7 more
wiley   +1 more source

EFECTO DEL TAMAÑO DE PARTICULA SOBRE, CONSUMO, DIGESTIBILIDAD Y BALANCE DEL NITRÓGENO EN OVINOS PELIBUEY ALIMENTADOS CON DIETAS BASADAS EN FRIJOL TERCIOPELO (Mucuna pruriens) Y GRANO DE MAIZ

open access: yesTropical and Subtropical Agroecosystems, 2009
Este trabajo evaluó el efecto del tamaño de partícula sobre: el consumo, conducta ingestiva, digestibilidad aparente, cinética digestiva y el balance del N en ovinos Pelibuey. Los tratamientos fueron tres tamaños de partícula en la dieta: pequeño (
Alfonso Juventino Chay Canul   +3 more
doaj  

Food loss and waste in the central market of a developing country: The case of Merida, Mexico.

open access: yesActa Scientiarum: Technology
Hunger and malnutrition have been an important challenge facing the world, with food insecurity being their main contributing factor. However, as the solving strategies focus on increasing production, food losses that reduce availability for consumption
César Molina-Heredia   +4 more
doaj   +1 more source

Experimental Evaluation of a Switching Matrix Applied in a Bank of Supercapacitors

open access: yesEnergies, 2017
Distributed power generation systems (DPGSs) integrate power sources that tend to be smaller than the typical utility scale, such as for renewable energy sources and other applications.
Maria Guadalupe Reveles-Miranda   +3 more
doaj   +1 more source

Biogeography of the Greater Antillean mosses [PDF]

open access: yes, 1990
The distinctions between dispersal and vicariance are discussed and shown how they relate to geological history. Postulated theories on the tectonic origins and history of the Greater Antilles are reviewed, as well as possible climatic events that would ...
Buck, William R.
core  

Spontaneous Symmetry Breaking and Chiral Symmetry [PDF]

open access: yes, 2000
In this introductory lecture, some basic features of the spontaneous symmetry breaking are discussed. More specifically, $\sigma $-model, non-linear realization, and some examples of spontaneous symmetry breaking in the non-relativistic system are ...
Li, Ling-Fong
core   +2 more sources

Fecal Steroids as Tracers of Human Population and Waste Management Practices at the Ancient Maya City of Ucanal, Guatemala

open access: yesArchaeometry, EarlyView.
ABSTRACT Geochemical data compiled from dried sediments from three water reservoirs at the ancient Maya city of Ucanal, Petén, Guatemala, reveal low to undetectable fecal biomarker concentrations. These low concentrations may be the result of the aerobic decay of sterols combined with well‐managed waste disposal practices.
Jean D. Tremblay   +3 more
wiley   +1 more source

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