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Extracellular vesicles and its advances in female reproduction
(2018-01-01)
Intercellular communication is an essential mechanism for development and maintenance of multicellular organisms. Extracellular vesicles (EVs) were recently described as new players in the intercellular communication. EVs ...
Impacts of Reproductive Technologies on Beef Production in South America
(Springer, 2014-01-01)
The majority of beef cow herds in South America are constituted by Bos indicus females, which have particular reproductive features that contribute to reduced reproductive efficiency compared with that of B. taurus cohorts. ...
Reproductive biology of the southernmost Kentropyx lizard from the Wet Chaco of Corrientes, Argentina
(British Herpetological Society, 2016)
Studies on reproductive modes, size at maturity, clutch size and clutch frequency have contributed greatly to our understanding of life history variation among lizard populations, and thereby, to implement conservation ...
An exploratory analysis to identify reproductive strategies of billfishes
(Journal of Fisheries and Aquatic Sciences, 2011)
This contribution is aimed to the identification of reproductive patterns of billfishes, which is in turn a key issue supporting management and conservation policies. Information reported in the literature on features of ...
Assessment in the primary care of the State of Sao Paulo, Brazil: incipient actions in sexual and reproductive health
(Revista De Saude Publica, 2017-01-01)
OBJECTIVE: The objective of this study is to assess performance in sexual and reproductive health of primary health care services of the Brazilian Unified Health System, in the State of Sao Paulo, Brazil. METHODS: An ...
The importance of pollinator generalization and abundance for the reproductive success of a generalist plant
(Public Library Science, 2013-10-07)
Previous studies have examined separately how pollinator generalization and abundance influence plant reproductive success, but none so far has evaluated simultaneously the relative importance of these pollinator attributes. Here we evaluated the extent to which pollinator generalization and abundance influence plant reproductive success per visit and at the population level on a generalist plant, Opuntia sulphurea (Cactaceae). We used field experiments and path analysis to evaluate whether the per-visit effect is determined by the pollinator?s degree of generalization, and whether the population level effect (pollinator impact) is determined by the pollinator?s degree of generalization and abundance. Based on the models we tested, we concluded that the per-visit effect of a pollinator on plant reproduction was not determined by the pollinators? degree of generalization, while the population-level impact of a pollinator on plant reproduction was mainly determined by the pollinators? degree of generalization. Thus, generalist pollinators have the greatest species impact on pollination and reproductive success of O. sulphurea. According to our analysis this greatest impact of generalist pollinators may be partly explained by pollinator abundance. However, as abundance does not suffice as an explanation of pollinator impact, we suggest that vagility, need for resource consumption, and energetic efficiency of generalist pollinators may also contribute to determine a pollinator?s impact on plant reproduction....
Reproductive migration of fish and movement in a series of reservoirs in the Upper Parana River basin, Brazil
(Wiley-Blackwell, 2013-10-01)
AbstractThis study evaluates the effectiveness of two fish passes at two hydropower dams (Canoas I and II) in the Upper Parana basin, which form part of a cascade of three reservoirs. Fish from 12 migratory species (3089 ...
Phenotypic diversity in female body shape is related to reproductive potential in Tupinambis merianae lizards
(Finnish Zoological Botanical Publishing Board, 2015-06)
A major goal in evolutionary biology is to determine the mechanisms responsible for maintaining phenotypic variation. Species that have evolved intersexual differences provide an opportunity to increase our understanding ...