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

Complete Genome Sequence of Houston Virus, a Newly Discovered Mosquito-Specific Virus Isolated from Culex quinquefasciatus in Mexico

ABSTRACT We fully sequenced the genome of Houston virus, a recently discovered mosquito-associated virus belonging to the newly established family Mesoniviridae. The isolate was recovered from Culex quinquefasciatus in southern Mexico, which shows that the geographic range of Houston virus is not restricted to the United States in North America

Metabarcoding: A Powerful Yet Still Underestimated Approach for the Comprehensive Study of Vector-Borne Pathogen Transmission Cycles and Their Dynamics

The implementation of sustainable control strategies aimed at disrupting the transmission of vector-borne pathogens requires a comprehensive knowledge of the vector ecology in the different eco-epidemiological contexts, as well as the local pathogen transmission cycles and their dynamics. However, even when focusing only on one specific vector-borne disease, achieving this knowledge is highly challenging, as the pathogen may exhibit a high genetic diversity and multiple vector species or subspecies and host species may be involved. In addition, the development of the pathogen and the vectorial capacity of the vectors may be affected by their midgut and/or salivary gland microbiome. The recent advent of Next-Generation Sequencing (NGS) technologies has brought powerful tools that can allow for the simultaneous identification of all these essential components, although their potential is only just starting to be realized. We present a metabarcoding approach that can facilitate the description of comprehensive host-pathogen networks, integrate important microbiome and coinfection data, identify at-risk situations, and disentangle the transmission cycles of vector-borne pathogens. This powerful approach should be generalized to unravel the transmission cycles of any pathogen and their dynamics, which in turn will help the design and implementation of sustainable, effective, and locally adapted control strategies

Biología reproductiva del olivo (BRO-EEZ-CSIC)

Trabajo presentado a las III Jornadas Nacionales del grupo de Horticultura de la SECH, celebradas en Sevilla el 6 y 7 de octubre de 2011.Peer reviewe

Microscopy to study plant sexual reproduction

This work has been supported by numerous research projects. Currently active projects include EFDF confunded grants BFU2011-22779 (Ministerio de Economía y Competitividad), P2010-CVI5767, P2010-AGR6274 and P2011-CVI7487 (Junta de Andalucía), and PEOPLE-PIOF-GA-2011-301550 (European Research Council)Peer reviewe

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

Gonotrophic cycle estimate for Culex quinquefasciatus in Mérida, Yucatán, México

West Nile virus (WNV) has been present in the Yucatán State, México, since 2002. Culex quinquefasciatus, one of the main vectors of WNV transmission in the United States, is also common in Mexico and may be a key vector of WNV transmission to humans in the Yucatán. The aim of this study was to determine the length of the gonotrophic cycle and the survival rates of Cx. quinquefasciatus from Mérida, Yucatán, during the rainy versus the dry season. Mosquitoes were collected during 25-day periods in October (rainy season) and in April (dry season), and captured females were classified by abdominal appearance (freshly fed, late-stage fed, half gravid, and subgravid). To determine the age structure as nulliparous and parous females and to calculate the gonotrophic cycle through a time series and the mosquito survival, we used Davidson formulae. Also, vitellogenesis analysis to monitor egg maturity was conducted during both seasons. Cross-correlation data suggested a similar length of the gonotrophic cycle (4 days) in both seasons. Oogenic development required a minimum of 72 h in each season. However, survival of the mosquito population collected in the rainy season was significantly higher (0.91) with a mean temperature of 28 ± 1.57°C than was survival in the dry season (0.78) with a mean temperature of 29 ± 1.10°C. Survival, although higher during the rainy season, did not influence the length of the gonotrophic cycle of Cx. quinquefasciatus in Yucatán