The Crimson Topaz, Topaza pella, is the least known of the two hummingbird species of this exclusively Amazonian trochilid genus, that also includes T. pyra. Most available information on T. pella nests, young and reproductive behavior is based on anecdotal observations from Guyana in the 1930s and 1950s...
Abstract The gastropod Littoraria angulifera (Littorinidae) is an exclusively estuarine mollusk with Neotropical anfiatlantic distribution. Recent studies indicate a possible use of the species as bioindicator. The aim of this study was to analyze the shell height, as well as to perform a morphometric an...
RESUMEN Con el objetivo de caracterizar la calidad seminal de hombres en un centro de reproducción asistida de la ciudad Guayaquil (Ecuador), se colectaron 204 muestras de semen de pacientes con problemas de fertilidad de entre 20 y 57 años, atendidos entre mayo de 2017 y septiembre de 2018. Se realizÃ...
Introduction: Lepidochelys olivacea is the most abundant sea turtle in the Colombian Pacific and oceanographic conditions at the Eastern Tropical Pacific may have an effect on its reproductive behavior Objective: To assess the relationship between reproductive aspects of L. olivacea nesting at Gorgona is...
O propósito deste trabalho é discutir os problemas da idealização da maternidade em teorias psicanalÃticas. Adotamos o livro The Reproduction of Mothering como objeto para análise em função de sua repercussão histórica na psicanálise e no feminismo, bem como pela fundamentação teórica utili...
Responsabilidad Parental,
Feminismo,
Psicoanálisis,
EmpatÃa,
Ejercicio FÃsico,
Mujeres,
Madres,
Reproducción,
TeorÃa PsicoanalÃtica,
Trabajo,
Papel,
Cuidado del Niño
ABSTRACT Replacement beef heifers in extensive systems of the neotropical savannas of Colombia are low priority animals and are assigned to native savannas and low-quality pastures, with scarcely researched long-term consequences. The study pooled data from four contemporary grazing experiments to determ...
Carne,
Bovinos,
Pradera,
Ecosistema Tropical,
Destete,
Estación Lluviosa,
Crecimiento,
Longevidad,
Brachiaria,
Carne Roja,
Dieta,
ProteÃnas,
Reproducción
RESUMEN Objetivo. Estimar parámetros genéticos para peso a los ocho meses de edad (W8M), edad al primer parto (AFC) y primer intervalo entre partos (FCI) usando parentesco genómico y por pedigrÃ. Materiales y métodos. Se utilizaron 481, 3063 y 1098 registros fenotÃpicos para W8M, AFC y FCI, respe...
Resumen Recordamos al abate Lázaro Spallanzani (1729-1799) fundamentalmente por su victoriosa contienda con Needham sobre la generación espontánea, pero fue un hombre de múltiples intereses en distintos campos de la ciencia, desde la biologÃa a la volcanologÃa. Se lo llamó el "biólogo de los bió...
Abstract Wilson's Plover, Charadrius wilsonia, is widely distributed in coastal areas of the Americas. This report presents the first record of breeding in this species on Coroa do Avião Island, on the coast of Pernambuco, and in the estuary of the Cardoso and Camurupim rivers, on the coast of PiauÃ, ...
The most used reproduction method in beef cattle in Brazil is natural breeding, which corresponds to 84% of calves born. Breeders adopt the bull:cow ratio of 1:25, which results in a sub utilization of bulls, making natural breeding antieconomic and underestimating the reproductive abi...
