Buscar
Mostrando ítems 21-30 de 5372
The role of the seasonal and semi-diurnal tidal cycle on mesozooplankton variability in a shallow mixed estuary (Bahía Blanca, Argentina)
(Oxford University Press, 2012-05)
The role of the seasonal and semi-diurnal tidal cycle on mesozooplankton dynamics was investigated in the inner zone of the Bahía Blanca Estuary (BBE), Argentina. Hydrological data and mesozooplankton samples were obtained ...
Characterization of the seasonal variation of soil moisture in Argentina
(John Wiley & Sons Ltd, 2020-07)
Soil moisture is an essential variable for both the agricultural production and the functioning of natural ecosystems, as well as one of the main variables regulating the climate system. Like precipitation, soil moisture ...
Follicular dynamics in Mangalarga mares.
(1997-12-01)
Ovarian follicular activity was studied by ultrasonography during 17 oestrous cycles in 9 Mangalarga mares during the second half of the ovulatory season. Sixteen oestrous cycles were considered normal and one 3-wave cycle ...
Low doses of glyphosate can affect the nutrient composition of common beans depending on the sowing season
(2021-11-10)
Glyphosate application, even in low doses, changes the nutrient composition of crops. The objective of this research was to evaluate the effects of low doses of glyphosate and the sowing season on the macronutrient and ...
Multivariate analysis of the energy cycle of the South American rainy season
(JOHN WILEY & SONS LTD, 2009)
The South American (SA) rainy season is studied in this paper through the application of a multivariate Empirical Orthogonal Function (EOF) analysis to a SA gridded precipitation analysis and to the components of Lorenz ...
Female germ cell renewal during the annual reproductive cycle in Ostariophysians fish
(2013-03-01)
The objective was to characterize female germ cell renewal during the annual reproductive cycle in two species of ostariophysian fish with distinct reproductive strategies: a siluriform, Pimelodus maculatus, in which oocyte ...
Annual characteristics of estrous activity in wool and hair ewe lambs under subtropical conditions
(Univ Sao Paolo, 2007-09-01)
The increased emphasis placed on lamb production in Brazil points to the need for a better knowledge of the annual pattern of reproductive activity in ewe lambs. This study evaluates the annual estrous activity pattern of ...
Dependence of equatorial F region vertical drifts on season and solar cycle
(American Geophysical Union, 1979-10-01)
Vertical drift measurements have been made at Jicamarca for more than half a solar cycle. The data from periods of high and low activity are appreciably different. Daytime drift velocities during sunspot minimum are usually ...