Reproductive Output
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Melatonin effects on ovarian follicular cells: a systematic review
RESUMO A melatonina é conhecida por seus efeitos no sono e no sistema reprodutivo dos mamíferos. Este último tem receptores de melatonina tipos 1 e 2, que atuam para regular, entre outras coisas, o AMP cíclico. Apesar de todos os dados da literatura, ainda não há um conhecimento sólido ou uma compreensão clara da ação do hormônio na fisiologia das
Rev. Assoc. Med. Bras.. Publicado em: 12/09/2019
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2. Contrasting life-histories in two syntopic amphibians of the Leptodactylus fuscus group (Heyer 1978)
Abstract Abstract: We used skeletochronology to compare age, size, reproductive parameters and growth patterns of two related, anuran amphibians from Northern Argentina: Leptodactylus bufonius(n=69) andL. latinasus(n=56), in order to better understand their coexistence in syntopy. Previous studies showed that the two species overlap in their dietary requirem
An. Acad. Bras. Ciênc.. Publicado em: 29/07/2019
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3. A simulation model to evaluate the economic consequences of insemination programs in dairy herds: timed artificial insemination and sex-sorted semen
ABSTRACT The objective of this study was to develop a simulation model to analyse the technical, economic, and financial performance of using different reproductive strategies in dairy herds. Strategies simulated were: artificial insemination (AI) using conventional semen after oestrus detection (AIC), AI using sex-sorted semen after oestrus detection (AIS),
R. Bras. Zootec.. Publicado em: 29/11/2018
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4. The influence of environmental variables in the reproductive performance of Macrobrachium amazonicum (Heller, 1862) (Caridea: Palaemonidae) females in a continental population
ABSTRACT Macrobrachium amazonicum is a commercially important freshwater prawn with a high degree of reproductive plasticity. The species is classified into two groups: coastal populations, with larger individuals exhibiting high fecundity and needing brackish water for larval development; and continental populations, with smaller specimens exhibiting low fe
An. Acad. Bras. Ciênc.. Publicado em: 2018-04
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5. Reproductive investment and multiple spawning evidence in the redfinger rubble crab Eriphia gonagra (Brachyura, Eriphioidea)
Abstract The variation in reproductive investment (RI) and the hypothesis of multiple spawning were evaluated in the redfinger rubble crab Eriphia gonagra (Fabricius, 1781). The gonads and embryos showed synchronous development, and fecundity and RI varied widely among females of the same size class. The mean RI value recorded was 11.31%, with no significant
Nauplius. Publicado em: 27/04/2017
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6. Great unexpected differences between two populations of the intertidal crab Neohelice granulata inhabiting close but contrasting habitats (Crustacea: Decapoda: Brachyura)
ABSTRACT Two populations of the Southwestern Atlantic burrowing crab, Neohelice granulata (Dana, 1851), are separated by only 190 km. They inhabit bays that drain into a Patagonian gulf in the southernmost limit of the geographical distribution of the species: San Antonio Bay (SAO) and San José Gulf (RSJ). The population from SAO has been extensively studie
Zoologia (Curitiba). Publicado em: 24/11/2016
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7. EFEITO DE FREQUÊNCIAS DE SUPLEMENTAÇÃO NO COMPORTAMENTO INGESTIVO, PADRÃO DE DESLOCAMENTO E INGESTÃO DE MATÉRIA SECA POR NOVILHAS DE CORTE / The effects of several supplementation frequencies on ingestive behavior, displacement patterns and dry matter intake by beef heifers
The dry matter intake, ingestive behavior and displacement patterns were evaluated on beef heifers exclusively on pasture or receiving oats grain daily (frequent) or from Monday to Friday (infrequent) in "Vegetative" and "Reproductive" phenological stages of Alexandergrass (Urochloa plantaginea Link.). The grazing method was continuous with a variable number
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2012
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8. Morphological and morphometrical assessment of spermathecae of Aedes aegypti females
The vectorial capacity of Aedes aegypti is directly influenced by its high reproductive output. Nevertheless, females are restricted to a single mating event, sufficient to acquire enough sperm to fertilize a lifetime supply of eggs. How Ae. aegypti is able to maintain viable spermatozoa remains a mystery. Male spermatozoa are stored within either of two spe
Mem. Inst. Oswaldo Cruz. Publicado em: 2012-09
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9. Biologia comparada e comportamento de Tetranychus urticae Koch (Acari: Tetranychidae) e Phytoseiulus macropilis (Banks) (Acari: Phytoseiidae) em algodoeiro bollgardTM e Isolinha não-Transgênica
The two spotted spider mite, Tetranychus urticae Koch, is a nontarget herbivore of Bt-cotton, but acquires and accumulates higher levels of Cry toxin than that expressed by transgenic plants. This work investigated the development and reproduction of T. urticae and of the predator Phytoseiulus macropilis Banks, during three successive generations looking for
Neotropical Entomology. Publicado em: 2010-06
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10. Chemical ecology and reproduction of Neoleucinodes elegantalis Guenée (Lepidoptera : Crambidae) / Ecologia química e reprodução de Neoleucinodes elegantalis Guenée (Lepidoptera : Crambidae)
The reproduction in insects is affected by a wide array of factors that acts directly on the reproductive output, related with offspring quality and quantity: the interaction, by physical, chemical and visual cues, between insects and host plants; the larval growth rate affecting adult size and mating rate, as a mechanism of reproductive sucess. Thus, studie
Publicado em: 2010
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11. Determinação da concentração espermática para melhor taxa de fertilização do híbrido tambacu (Colossoma macropomum X Piaractus mesopotamicus)
The techniques of artificial reproduction by inducing reproductive fish that inhabit running waters(reofílicos) is part of everyday life in the fish farms in Goiás.These techniques must be refine in order to provide a better fertilization rate of sperm/oocyte.The hybrid tambacu is one of the most grown fish in Brazil, from the cross of tambaquis female(Col
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/03/2009
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12. Body size and extinction risk in Brazilian carnivores
Because extinctions are not random across taxa, it is important for conservation biologists to identify the traits that make some species more vulnerable. Factors associated with vulnerability include small geographical ranges, low densities, high trophic level, "slow" life histories, body size, and tolerance to altered habitats. In this study we examined th
Biota Neotropica. Publicado em: 2009-06