El estrés en los peces. II-Factores estresantes comunes en los peces cultivados

Los peces cultivados están sometidos habitualmente a una serie de condiciones negativas que provienen tanto de las características físico-químicas de su medio ambiente, como de las operaciones propias del cultivo. En este trabajo se revisan los principales factores causantes de estrés a los peces, tales como calidad del agua (temperatura, pH, oxígeno disuelto, contaminantes, etc.), manipulación, tratamiento de enfermedades y anestesi

El estrés en los peces. II-Factores estresantes comunes en los peces cultivados

Fish in intensive culture are affected both by the characteristics of aquatic environment itself and by the stress of hatchery conditions. This paper review the more common causes of stress in fish such as water quality (temperature, pH, dissolved oxigen, contaminants, etc.), handling, disease treatments and anaesthesia.Los peces cultivados están sometidos habitualmente a una serie de condiciones negativas que provienen tanto de las características físico-químicas de su medio ambiente, como de las operaciones propias del cultivo. En este trabajo se revisan los principales factores causantes de estrés a los peces, tales como calidad del agua (temperatura, pH, oxígeno disuelto, contaminantes, etc.), manipulación, tratamiento de enfermedades y anestesia

Parallel evolution of vgsc mutations at domains IS6, IIS6 and IIIS6 in pyrethroid resistant Aedes aegypti from Mexico

Aedes aegypti is the primary urban mosquito vector of viruses causing dengue, Zika and chikungunya fevers –for which vaccines and efective pharmaceuticals are still lacking. Current strategies to suppress arbovirus outbreaks include removal of larval-breeding sites and insecticide treatment of larval and adult populations. Insecticidal control of Ae. aegypti is challenging, due to a recent rapid global increase in knockdown-resistance (kdr) to pyrethroid insecticides. Widespread, heavy use of pyrethroid spacesprays has created an immense selection pressure for kdr, which is primarily under the control of the voltage-gated sodium channel gene (vgsc). To date, eleven replacements in vgsc have been discovered, published and shown to be associated with pyrethroid resistance to varying degrees. In Mexico, F1,534C and V1,016I have co-evolved in the last 16 years across Ae. aegypti populations. Recently, a novel replacement V410L was identifed in Brazil and its efect on vgsc was confrmed by electrophysiology. Herein, we screened V410L in 25 Ae. aegypti historical collections from Mexico, the frst heterozygote appeared in 2002 and frequencies have increased in the last 16 years alongside V1,016I and F1,534C. Knowledge of the specifc vgsc replacements and their interaction to confer resistance is essential to predict and to develop strategies for resistance management

El estrés en los peces. I. - Respuestas fisiológicas

Cultured fish are continuously under stress conditions. The knowledge of all the factors influencing such physiological state and the changes they can produce in normal fish performance is of major importance for a good management of a fish factory. In this review, endocrine, metabolic, tissue, physiological and behavioral changes in fish are discussed.Los peces y en particular los cultivados, están continuamente sometidos a cierto grado de estrés. El conocimiento de todos aquellos factores que pueden estresar a los peces y de los cambios que pueden ocasionar en el desarrollo normal de los mismos, resulta de la mayor importancia para el buen funcionamiento de una piscifactoría. En esta revisión se describen los efectos generales que ocasiona el estrés a los peces y que incluyen cambios endocrinos, metabólicos, tisulares y comportamentales

El estrés en los peces. I. - Respuestas fisiológicas

Los peces y en particular los cultivados, están continuamente sometidos a cierto grado de estrés. El conocimiento de todos aquellos factores que pueden estresar a los peces y de los cambios que pueden ocasionar en el desarrollo normal de los mismos, resulta de la mayor importancia para el buen funcionamiento de una piscifactoría. En esta revisión se describen los efectos generales que ocasiona el.estrés a los peces y que incluyen cambios endocrinos, metabólicos, tisulares y comportamentales.Cultured fish are continuously under stress conditions. The knowledge of all the factors influencing such physiological state and the changes they can produce in normal fish performance is of major importance for a good management of a fish factory. In this review, endocrine, metabolic, tissue, physiological and behavioral changes in fish are discussed

Discrimination of Portuguese olive cultivars by pollen morphology and ultrastructure

Comunicación presentada al XVII International Symposium APLE celebrado en Ourense (España) del 7 al 10 de Julio de 2010.This work was funded projects MCel BFU2008-00629, CSIC-FCT Ref. 2007PT0039 and FCT-POCI 2010.Peer reviewe

Serologic Evidence of West Nile Virus Infection in Horses, Yucatan State, Mexico

Serum samples were obtained from 252 horses in the State of Yucatan, Mexico, from July to October 2002. Antibodies to West Nile virus were detected by epitope-blocking enzyme-linked immunosorbent assays in three (1.2%) horses and confirmed by plaque reduction neutralization test. We report the first West Nile virus activity in the State of Yucatan