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Now showing items 792191-792200 of 857633
Lifespan and reproductive dynamics of the commercially important sea bob shrimp xiphopenaeus kroyeri (penaeoidea): synthesis of a 5-year study
(Crustacean Soc, 2015-01-01)
Population parameters of the shrimp Xiphopenaeus kroyeri (Heller, 1862) (sex ratio, length-frequency distributions (carapace length, CL), growth, lifespan, size of sexual maturity, spawning and recruitment) were analyzed ...
Chromosome evolution in lycosoid spiders (Araneomorphae): a scenario based on analysis of seven species of the families Lycosidae, Senoculidae and Trechaleidae
(Amer Arachnological Soc, 2015-01-01)
Within the araneomorph lineage Entelegynae, the "Higher lycosoids''("True Lycosoids''or Lycosoidea s.s.) is one of the major clades varying in its composition based on several conflicting phylogenetic ...
Role of cyclooxygenase-2 in Trypanosoma cruzi survival in the early stages of parasite host-cell interaction
(Fundaco Oswaldo Cruz, 2015-04-01)
Chagas disease, caused by the intracellular protozoan Trypanosoma cruzi, is a serious health problem in Latin America. During this parasitic infection, the heart is one of the major organs affected. The pathogenesis of ...
Effects of andiroba (Carapa guianensis) oil in ticks: ultrastructural analysis of the synganglion of Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae)
(Elsevier B.V., 2015-01-01)
The present study performed an analysis of the ultrastructural changes induced by andiroba seed oil in the synganglion of Rhipicephalus sanguineus female ticks, aiming to provide scientific grounds to help in the creation ...
6-Dimethylaminopurine and cyclohexamide are mutagenic and alter reproductive performance and intrauterine development in vivo
(Funpec-editora, 2015-01-01)
The compounds 6-dimethylaminopurine (6-DMAP) and cyclohexamide (CHX) are currently used to stimulate the development of embryos produced by nuclear transfer in the production of cloned mammals with a great deal success. ...
Disappearance of fat body proteins during soldier differentiation in the neotropical termite Heterotermes tenuis (Isoptera: Rhinotermitidae)
(Springer, 2015-03-01)
Termites are social insects with well-defined castes: workers, soldiers and reproductives. The soldier is a terminal stage and originates from either larvae or workers after two molting processes that include an intermediate ...
The extensible integument of Rhipicephalus sanguineus female ticks in different feeding stages: a morphological approach
(Wiley-Blackwell, 2015-07-01)
Ticks are among the most important pathogen vectors worldwide, and the knowledge of their internal and external morphology may provide relevant information that will allow an adequate control of these animals. In this ...
Tests of fed and unfed Amblyomma cajennense ticks (Acari: Ixodidae): first morphological data
(Wiley-Blackwell, 2015-07-01)
The tick species Amblyomma cajennense is of great medical importance, as it is the vector of the Rickettsia rickettsii, agent of Rocky Mountain spotted fever. The objective of this study was to perform a morphological and ...
Chromosomal Microstructure Diversity in Three Astyanax (Characiformes, Characidae) Species: Comparative Analysis of the Chromosomal Locations of the 18S and 5S rDNAs
(Mary Ann Liebert, Inc, 2015-02-01)
The species of genus Astyanax is widely distributed in freshwater neotropical zones. Astyanax is considered to be taxonomically confused, similar to other genera placed incertae sedis in Characidae. The cytogenetics of ...
Pectinases From Sphenophorus levis Vaurie, 1978 (Coleoptera: Curculionidae): Putative Accessory Digestive Enzymes
(Oxford Univ Press Inc, 2015-02-11)
The cell wall in plants offers protection against invading organisms and is mainly composed of the polysaccharides pectin, cellulose, and hemicellulose, which can be degraded by plant cell wall degrading enzymes (PCWDEs). ...