Fecundity
Mostrando 13-24 de 359 artigos, teses e dissertações.
-
13. Population and reproductive biology of two caprellid species (Crustacea: Amphipoda) associated to Sargassum cymosum (Phaeophyta: Fucales) on the southeast coast of Brazil
Abstract Caprellid amphipods are common crustaceans at Sargassum beds of southeastern Brazil and constitute an important link between primary producers and marine consumers. The goal of this study is to evaluate population and reproductive biology of two caprellid species: Paracaprella tenuis Mayer, 1903 and Pseudaeginella montoucheti Quitete, 1971. Sargassu
Nauplius. Publicado em: 28/03/2019
-
14. Social inequality, human development and fertility pattern in Brazil, 2000-2010
Resumo Objetivos: analisar o padrão de fecundidade no Brasil e sua relação com o desenvolvimento humano nas unidades de federação no Brasil em 2000 e 2010. Métodos: trata-se de estudo ecológico cuja unidade de análise foram as Unidades Federativas brasileiras no período de 2000 e 2010. A fecundidade foi avaliada considerando os indicadores sociais
Rev. Bras. Saude Mater. Infant.. Publicado em: 2019-03
-
15. First record of Apistogrammoides pucallpaensis Meinken, 1965 (Perciformes, Cichlidae) for Brazil, in addition to fecundity information
Resumo Objetivo Este trabalho tem como objetivo registrar a ocorrência de Apistogrammoides pucallpaensis no território brasileiro, pois até o momento tem sua distribuição restrita ao Peru e Colômbia. Métodos As coletas foram realizadas no ano de 2013, durante o levantamento da ictiofauna da região do Auati-Paraná, localizada na Reserva Mamirauá
Acta Limnol. Bras.. Publicado em: 18/02/2019
-
16. Fertility Life Table, Population Parameters and Biotic Potential of Helicoverpa gelotopoeon (Dyar) (Lepidoptera: Noctuidae)
Abstract Helicoverpa gelotopoeon is an endemic pest of South America that affects soybean and other important crops. Life tables are a fundamental tool used to study insect populations, resulting in crucial information for integrated pest management programs. Therefore, the aim of this study was to evaluate the biotic potential and the construction of a life
An. Acad. Bras. Ciênc.. Publicado em: 25/10/2018
-
17. Fecundity, embryo size and embryo loss in the estuarine shrimp Salmoneus carvachoi Anker, 2007 (Crustacea: Alpheidae) from a tidal mudflat in northeastern Brazil
Abstract Studies on fecundity and embryo size have been frequently used to infer about the reproductive potential, embryogenesis, and the energy investment in embryo production in crustaceans. These parameters are relevant to the knowledge of life-history and diversity of reproductive strategies developed by this group. This study addressed the embryo produc
Pap. Avulsos Zool.. Publicado em: 22/10/2018
-
18. Trade off between quantity and size of pollen grains in the heterandrous flowers of Senna pendula (Fabaceae)
ABSTRACT Heteranthery, the presence of different types of stamens in a flower, may reduce the conflict between pollinators and plants by ensuring the resource for the pollinator without drastically affecting the availability of viable male gametes for fertilization, according to the division-of-labor hypothesis. We investigated whether the poricidal anthers
Acta Bot. Bras.. Publicado em: 30/07/2018
-
19. 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
-
20. Non-seasonal reproduction in inseminating species of Mimagoniates (Characidae, Characiformes) from southern Brazil
Abstract Some aspects of reproduction in two species of Mimagoniates, M. microlepis (Steindachner 1877) and M. rheocharis Menezes & Weitzman 1990 are herein described. Samples were taken monthly from January 1998 to February 1999 in two streams in the locality of Maquiné, Rio Grande do Sul, Brazil. Results from the analysis of hundreds of specimens of M. mi
Pap. Avulsos Zool.. Publicado em: 19/03/2018
-
21. Effects of temephos resistance on life history traits of Aedes albopictus (Skuse) (Diptera: Culicidae), a vector of arboviruses
Abstract The effects of temephos resistance on the fitness cost of the wild populations of Aedes albopictus was evaluated. The larvae of two wild populations were exposed to the diagnostic dose of 0.02 mg and 0.012 mg/L. The larvae which survived after the 24 h exposure to diagnostic dose were considered as resistant and F1 generations were chosen for the co
Rev. Bras. entomol.. Publicado em: 2017-12
-
22. Population biology of Macrobrachium jelskii (Miers, 1877) (Decapoda, Palaemonidae) from an artificial pond in Bahia, Brazil
Abstract The freshwater prawn Macrobrachium jelskii (Miers, 1877) is widely distributed in South America’s lentic and lotic habitats. We studied the population structure and reproductive biology of the species in the municipality of Cruz das Almas, state of Bahia, Brazil, to supply information on this ecologically and economically relevant species. Samples
Nauplius. Publicado em: 04/09/2017
-
23. Reproductive biology of the Green Ground Snake Erythrolamprus poecilogyrus sublineatus (Serpentes: Dipsadidae) in Subtropical Brazil
ABSTRACT We investigated reproductive features of the dipsadid snake Erythrolamprus poecilogyrus sublineatus in the southernmost Brazilian coast, a subtropical region characterized by well-marked seasons. Females are significantly smaller than males, have a shorter tail, and reach sexual maturity at later times along their development. In contrast to tropic
An. Acad. Bras. Ciênc.. Publicado em: 24/07/2017
-
24. Reproductive potential of Pagrus pagrus (Perciformes: Sparidae) in coastal waters of Buenos Aires Province (Argentina) and Uruguay (34º-39ºS)
ABSTRACT The reproductive potential of red porgy in coastal waters of Buenos Aires Province (Argentina) and Uruguay (34º-39ºS) was studied by means of a macroscopic and histological analysis of the gonads. Length and age at first maturity were determined, and fecundity, spawning frequency and egg quality were estimated. The spawning season extended from sp
Neotrop. ichthyol.. Publicado em: 03/07/2017