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Assessment of chitin variation in seston of a temperate estuary (Bahía Blanca, Argentina)
(Springer Verlag, 2018-12-19)
Chitin was quantified in seston samples to determine its seasonal and spatial distribution in the estuary of Bahia Blanca. Sampling was conducted at three sites: Puerto Cuatreros, Maldonado, and Canal Vieja in autumn, ...
Palynological analysis of Lama guanicoe modern feces and its importance for the study of coprolites from Patagonia, Argentina
(Elsevier Science, 2012-09)
The aim of the present study was to develop a seasonality palynological model from modern feces of Lama guanicoe for the interpretation of pollen found in coprolites. For this purpose, fecal samples of L. guanicoe were ...
Temporal variations of larval digenean assemblages parasitizing Heleobia Parchappii (Mollusca: Cochliopidae) in two shallow lakes from the Buenos Aires province, Argentina
(Fundaçao Zoobotanica Rio Grande Sul, 2019-07)
The larval digenean assemblages in snail hosts are influenced by biotic and abiotic factors and by environmental disturbances due to human activities. Given their susceptibility to different types of impact, they can be ...
Morphological aspects and seasonal changes of some planktonic ciliates (Protozoa) from a temporary pond in Buenos Aires Province, Argentina
(Panamjas, 2006-12)
The morphology of some planktonic ciliates in a temporary freshwater pond located in Buenos Aires province, Argentina, is compared and the seasonal variation in their abundances over an annual cycle is described. Samples ...
Seasonality of Immunological and Health-State Parameters of Wild Broadnose Sevengill Shark, Notorynchus cepedianus
(University of Chicago Press, 2019-01)
Seasonal fluctuation in environmental parameters can influence immune responses of vertebrates and consequently influence their health and disease resistance. Although seasonality of immune function is well documented in ...
Bird mixed-species flock formation is driven by low temperatures between and within seasons in a Subtropical Andean-foothill forest
(Wiley Blackwell Publishing, Inc, 2018-09)
According to both the predation avoidance and foraging efficiency hypotheses, birds within mixed flocks increase their foraging efficiency and/or can spend more time feeding and less time looking out for predators. These ...
Seasonal changes in bird assemblages of a forest-steppe ecotone in North PatagoniaCambios estacionales en los ensambles de aves en un ecotono bosque-estepa del norte de Patagonia
(Neotropical Ornithological Society, 2018-12)
Estudiamos las variaciones estacionales en una comunidad de aves que habitan el ecotono bosque-estepa del norte de Patagonia. Analizamos los cambios en la riqueza de especies, la composición de especies y la abundancia ...
Seasonal trend analysis of minimum air temperature in La Plata river basin
(Springer Wien, 2021-04)
Regional economies that depend predominantly on agriculture and livestock are heavily affected by changes in air temperature, one such case are the activities in La Plata river basin (LPB). Some studies suggest that ...
Trends in the F2 ionospheric layer due to long-term variations in the Earth's magnetic field
(Elsevier, 2009-06)
The Earth's magnetic field presents long-term variations with changes in strength and orientation. Particularly, changes in the dip angle (I) and, consequently, in the sin(I)cos(I) factor, affect the thermospheric neutral ...
Monitoring of Atrazine Pollution and its Spatial-Seasonal Variation on Surface Water Sources of an Agricultural River Basin
(Springer, 2021-06)
Surface water sources are greatly impacted in areas with major agricultural land use. The atrazine quantification in surface waters as well as the spatial-temporal patterns of this herbicide was studied to detect pollution ...