domingo, 6 de abril de 2014

Nuestro último artículo, aceptado en Theriogenology



Sperm motility parameters and spermatozoa morphometric characterization in marine species: a study of swimmer and sessile species

V. Gallego, L. Pérez, J.F. Asturiano and M. Yoshida

Abstract
The biodiversity of marine ecosystems is diverse and a high number of species coexist side by side. However, despite the fact that most of these species share a common fertilization strategy, a high variability in terms of the size, shape and motion of spermatozoa can be found. In this study, we have analysed both the sperm motion parameters and the spermatozoa morphometric features of two swimmer (pufferfish and European eel) and two sessile (sea urchin and ascidian) marine species.
The most important difference in the sperm motion parameters was registered in the swimming-time period. The sperm of the sessile species displayed notably higher values than those of the swimmer species. In addition, the sperm motilities and velocities of the swimmer species decreased sharply from the moment the sperm was activated, whereas the sessile species were able to maintain their initial values for a long time. These results are linked directly to the species-specific lifestyles. While sessile organisms, who demonstrate limited or no movement, need to have sperm with a capacity to swim for long distances in order to find the oocytes, swimmer organisms can move towards the female and release gametes near it, and therefore the spermatozoa does not need to  be able to swim for such a long time period.
On the other hand, sperm morphology is related to sperm motion parameters and in this study an in depth morphometric analysis by CASA software of ascidian, sea urchin and pufferfish spermatozoa has been carried out for the first time. A huge variability in shapes, sizes, and structures were found using electron microscopy in the studied species.

International Conference on "Sex determination and differentiation in fishes - Genes, environment and behaviour

It will take place September 23th–24th, 2014 at Fundação da Faculdade de Ciências (FFCUL), Lisboa.

This conference aims to promote knowledge exchange and debate on the latest findings regarding processes of sex differentiation and mechanisms of primary sex determination in fishes. Genetic/epigenetic, environmental and behavioural factors will be discussed as well as the diversity of evolutionary scenarios described in fishes.
This international meeting will feature three outstanding speakers in the field: MANFRED SCHARTL (University of Würzburg, Germany), FRANCESC PIFERRER (Institut de Ciencies del Mar, CSIC, Spain) and RUI OLIVEIRA (ISPA, Portugal).

More info: https://www.fc.ul.pt/en/conferencia/sex-determination-and-differentiat
ion-fishes

sábado, 29 de marzo de 2014

Nuestro último artículo, aceptado en Aquaculture


Effect of thermal regime on fatty acid dynamics in male European eels (Anguilla anguilla) during hormonally-induced spermatogenesis
R. Baeza, I. Mazzeo, M.C. Vílchez, V. Gallego, D.S. Peñaranda, L. Pérez, J.F. Asturiano

Abstract
Little is known about the role of fat and fatty acids in European eel spermatogenesis. The aim of this work was to study the changes in fat content and to carry out a quantitative analysis of the fatty acid composition of the muscle, liver and gonad of European male eels throughout hormonally induced sexual maturation. The experiment was carried out under three different thermal regimes (two of them variable: T10 and T15; and one constant: T20) to replicate the changes of temperature that these fish undergo during their transoceanic reproductive migration. The European eel reached spermatogenesis earlier in treatment T20, suggesting that spermatogenesis in this species is closely regulated by water temperature. Although eels lose body mass due to the period of fasting that accompanies gonadal growth, no significant changes were found in the fat and fatty acid content of the muscle during the experimental period.
With regards to the liver, the levels of palmitic, eicosapentaenoic (EPA) and docosahexaenoic (DHA) acids increased significantly at the start of the spermiation process in all the thermal treatments.

In the testis, EPA, arachidonic acid (ARA) and DHA remained constant during the maturation process while the levels of the rest of the fatty acids decreased significantly. The stability of ARA and EPA levels in the testis may have a physiological significance, whereas the stability of DHA levels may have a structural one. The results suggest that the advancement of spermiation is influenced by water temperature and demonstrate the importance of the roles of EPA, ARA and DHA in European eel reproduction. This study makes it clear that complementary studies focusing on lipid composition of commercial diets could improve sperm quality in this species.

jueves, 27 de marzo de 2014

La Acción COST AQUAGAMETE financiará 14 nuevas estancias


La Acción COST AQUAGAMETE financiará 14 nuevas estancias (Short Term Scientific Missions) durante los últimos tres meses de su primer periodo (Marzo 2013-Mayo 2014), llegando así a un total de 31 estancias financiadas.

Los investigadores implicados viajarán de Dinamarca a Francia (1); República Checa a Japón (1); Francia a España (1); Hungría a España (1); República Checa a Francia (3); República Checa a España (1); España a Portugal (1); España a Eslovenia (1); España a Francia (1); Israel a Francia (1); Portugal a Italia (1); y Serbia a Hungría (1).


Buen viaje y mucho éxito a todos!

martes, 25 de marzo de 2014

Nuestro último artículo, aceptado en Reproduction in Domestic Animals

The regulation of aromatase and androgen receptor expression during gonad development in male and female European eel

D.S. Peñaranda, I. Mazzeo, V. Gallego, J. Hildahl, R. Nourizadeh-Lillabadi, L. Pérez, F.-A. Weltzien, J.F. Asturiano

Abstract
This research investigated the regulation of aromatase and androgen receptor gene expression in the brain-pituitary-gonad (BPG) axis of male and female European eels (Anguilla anguilla) during induced sexual maturation. Complete Anguilla anguilla aromatase (aa-cyp19a1) and partial androgen receptor α and β (aa-ara and aa-arb) sequences were isolated, and qPCR assays were validated and used for quantification of transcript levels for these three genes. Expression levels of the genes varied with sex, tissue, and stage of maturation. aa-arb was expressed at higher levels than aa-ara in the pituitary and gonad in both sexes, suggesting aa-arb is the physiologically most important androgen receptor in these tissues. In the female brain, a decrease in aa-ara and an increase in aa-cyp19a1 were observed at the vitellogenic stage. In contrast, a progressive increase in all three genes was observed in the pituitary and ovaries throughout gonadal development, with aa-arb and aa-cyp19a1 reaching significantly higher levels at the vitellogenic stage. In the male pituitary, a decrease in aa-arb and an increase in aa-cyp19a1 were observed at the beginning of spermatogenesis, and thereafter remained low and high, respectively. In the testis, the transcript levels of androgen receptors and aa-cyp19a1 were higher during the early stages of spermatogenesis and decreased thereafter. These sex-dependent differences in the regulation of the expression of aa-ara, aa-arb, and cyp19a1 are discussed in relation to the role of androgens and their potential aromatization in the European eel during gonadal maturation.

lunes, 10 de febrero de 2014

Novedades sobre las V Jornadas Ibéricas de Ictiología

Se ha abierto la inscripción de las V Jornadas Ibéricas de Ictiología que se celebrarán del 24 al 27 de junio de 2014 en el Museo Nacional de Historia Natural y Ciencia (MUHNAC) de Lisboa.
También se ha abierto el plazo para el envío de resúmenes que finalizará el día 31 de marzo de 2014.

Dudas sobre las Jornadas: sibic2014@museus.ul.pt 


jueves, 30 de enero de 2014

Congreso sobre epigenética


Epigenetics: From Bench to Bedside

Athens, Greece. 5-8 May 2014
Organized by COST Office

The conference will cover all potential aspects of the positive impact of epigenetics in human health and well-being either indirectly through the advances of agriculture, food biotechnology, and bio-data collection for a more selective therapy, or directly though therapeutics and drug discovery. Furthermore, the event will provide solid evidence for the anticipated central role of epigenetics in the definition of future science, thus critically supporting the establishment of the field as a top priority for the EU scientific community and the related industry.

More info: www.cost.eu/events/benchtobedside

miércoles, 22 de enero de 2014

Eel Symposium 2014

A Symposium entitled “Are eels climbing back up the slippery slope?” will be held during the annual meeting of the American Fisheries Society (AFS), in Quebec City, Canada, 17-21 August 2014.  The Symposium is jointly presented by the AFS and the International Council for the Exploration of the Sea (ICES), and will be convened by an international committee with European and North American representatives.

The International Eel Symposium 2014 invites submissions on the following:

- Eel stock status in different regions/countries,
- Anthropogenic impacts causing or contributing to the decline of eel stocks,
- Methodologies for monitoring and assessment of stocks, and quantification of mortality,
- Application of aboriginal, traditional, and historic knowledge to stock dynamics and conservation,
- The effects of protective measures on stock dynamics,
- The effects of stocking and other manipulations on stock dynamics,
- Eel passage at hydroelectric facilities,
- Oceanic processes in interaction with continental stock protection,
- Eel genetics and its relevance for conservation,
- Integrated inter-jurisdictional governance and effective conservation management of scattered stocks, and
- Socio-economics of eel fisheries, and how to sustainably exploit shared stocks.


More info: afs2014.org

domingo, 19 de enero de 2014

Asistimos al Eel Genome Symposium 2014

Esta semana hemos acudido (Luz Pérez, David S. Peñaranda, Marina Morini y yo mismo) al Eel Genome Symposium 2014 new perspectives in evolution, reproduction and ecology, celebrado en los Laboratorios Gorlaeus de la Universidad de Leiden (Holanda), y que han organizado Guido van den Thillart, Sylvie Dufour y Ron Dirks (Gracias!!).

Este symposium ha reunido a una cincuentena de investigadores, entre los que se encontraban otros investigadores españoles dedicados al estudio de la anguila, como Ibón Cancio (PIE-UPV/EHU, Plentzia; en el centro en la foto) y Enric Gisbert (IRTA, San Carles de la Ràpita; en la izquierda en la foto).

Hemos tenido la ocasión de discutir sobre resultados previos y sobre trabajos pendientes con otros participantes del proyecto PRO-EEL como Sylvie Dufour, y otros colegas como Finn-Arne Weltzien, así como cambiar impresiones con colegas japoneses, italianos, húngaros, etc.

Aunque la temática principal eran las aplicaciones del genoma de la anguila, el symposium ha contado con varias sesiones. Nuestra participación ha sido en la sesión dedicada a la endocrinología. En concreto se ha tratado de dos presentaciones orales (de David S. Peñaranda y Marina Morini, respectivamente), tituladas: Modulation of testis steroidogenic enzymes gene expression and steroid synthesis by temperature thermal regime during spermatogenesis in European eel (realizado en colaboración con la Universidad de Leiden y el NOFIMA, de Noruega) y DHP receptors and PLCZ1 expression during the European eel spermatogenesis (en colaboración con la Norwegian School of Veterinary Sciences, de Noruega);
además de un poster titulado: Characterization and expression of the Vitellogenin receptor in the European eel (en colaboración con el Museo Nacional de Historia Natural de París) y que ha presentado Marina (en la foto con Guido y Ron).

martes, 14 de enero de 2014

Becas predoctorales de La Caixa

La Obra Social "la Caixa", ha convocado 25 becas para realizar un doctorado en España.
Toda la información al respecto en:

Se va definiendo el contenido del Aquaculture Europe 14


El congreso, organizado por AZTI-Tecnalia y la European Aquaculture Society (EAS), se celebrará del 14 al 17 de octubre de 2014 en el Kursaal de Donostia-San Sebastián.

Está previsto un gran número de sesiones (*) de las que destacamos una sesión dedicada a los avances en la investigación sobre anguilas, y otra dedicada a la biología de los gametos de especies acuáticas, y que es parte de la Acción COST AQUAGAMETE. La segunda reunión del Management Committee de esta Acción se celebrará también durante el congreso.

Habrá precios especiales para la participación de miembros de la Sociedad Española de Acuicultura (SEA) y de la EAS.

Mas info: www.easonline.org

(*): Adding value to aquaculture products; Commercialisation of aquaculture products; Integrity, safety and authenticity of food products from aquaculture; By-products management; Climate change and environmental management; Nutrition: Requirements; Nutrition: Alternative feed ingredients; Nutrition: Outputs of the EU ARRAINA project; Hatchery; Land-based aquaculture technologies; Offshore mariculture; Stock management strategies to control reproduction prior to harvest; Beyond monoculture; Advances in disease and welfare; Marine biotechnology; Genomic research and applications; Species diversification; Salmon farming sustainability; Eels - research progress; Shellfish; Seaweeds as food, feed and economic activity; Aquaponics; Organic aquaculture; Knowledge management, transfer and extension networks; Governance, policy and strategic planning; Biology of aquatic species gametes (AQUAGAMETE COST ACTION); Laboratory fish models for aquaculture applications (e.g. Zebrafish and others) and Sustainability assessment of the aquaculture chain.

martes, 7 de enero de 2014

Nuestro último artículo, aceptado en Reproduction, Fertility and Development

The subpopulation pattern of eel sperm is affected by post-activation time, hormonal treatment and thermal regime

V. Gallego, M.C. Vílchez, D.S. Peñaranda, L. Pérez, M. P. Herráez, J.F. Asturiano, F. Martínez-Pastor

Natural stocks of eels (genus Anguilla) have suffered a dramatic reduction in the last 60 years, and the culture of eels is still based in the capture of very large quantities of juveniles. It is necessary to close the life cycle in captivity in order to lift the pressure on wild populations. Our aim has been to evaluate sperm subpopulations (through cluster analysis of computer-assisted sperm analysis -CASA- data) in European eel (Anguilla anguilla), and assess the effects of motility-acquisition time post-activation: 30, 60 and 90 s; thermal regimes: 10 ºC (T10) or 15 ºC (T15) and up to 20 ºC, or constant at 20 ºC (T20); and hormonal treatments: human chorionic gonadotropin (hCG), recombinant (hCGrec) or pregnant mare serum gonadotropin (PMSG). In all cases, we obtained three subpopulations: low velocity and linearity (S1), high velocity and low linearity (S2) and high velocity and linearity (S3, considered high-quality).
Total motility and S1 were affected by acquisition time, thus 30 s is recommended as the standard time for motility acquisition. When animals were kept at 20 _C (T20), motility data fitted quadratic models, with the highest motility and proportion of S3 between weeks 8 and 12 after the first injection. Lower temperatures (T10, T15) delayed spermiation and obtaining of high-quality sperm (S3), but did not seem to alter the spermiation process (similar subpopulation pattern). On the other hand, the hormonal treatments altered both the dynamics of the subpopulation pattern and the onset of spermiation (with PMSG delaying it). Total motility and the yield of S3 using the widely used hCG varied throughout the spermiation period. However, hCGrec allowed us to obtain high-quality and constant motility for most of the study (weeks 7 to 20), and the S3 yield was also higher overall (61.8%±1.3) and more stable over time than the other hormonal treatments (averaging 53.0%±1.4). Using T20 and hCGrec would be more economical and practical, allowing us to obtain a higher number of S3 spermatozoa for an extended time.

domingo, 5 de enero de 2014

Symposium sobre cultivos celulares de peces en el 11th ICFB

El próximo agosto, durante el 11th International Congress on Fish Biology organizado en Edimburgo por la Physiology Section de la American Fisheries Society se celebrará un symposium titulado "Fish Cell Cultures as a Tool for Fish Physiology Research".

Más información sobre el congreso en: http://icbf2014.sls.hw.ac.uk
El periodo de entrega de abstracts empieza mañana, 6 de enero de 2014.

viernes, 13 de diciembre de 2013

International Eel Symposium 2014


A Symposium entitled “Are eels climbing back up the slippery slope?” will be held during the annual meeting of the American Fisheries Society (AFS), in Quebec City, Canada, 17-21 August 2014.  The Symposium is jointly presented by the AFS and the International Council for the Exploration of the Sea (ICES), and will be convened by an international committee with European and North American representatives.

The International Eel Symposium 2014 invites submissions on the following:
- Eel stock status in different regions/countries,
- Anthropogenic impacts causing or contributing to the decline of eel stocks,
- Methodologies for monitoring and assessment of stocks, and quantification of mortality,
- Application of aboriginal, traditional, and historic knowledge to stock dynamics and conservation,
- The effect of protective measures on stock dynamics,
- The effects of stocking and other manipulations on stock dynamics,
- Oceanic processes in interaction with continental stock protection,
- Eel genetics and its relevance for conservation,
- Integrated inter-jurisdictional governance and effective conservation management of scattered stocks, and
- Socio-economics of eel fisheries, and how to sustainably exploit shared stocks.

jueves, 12 de diciembre de 2013

Nos visita Finn-Arne Weltzien

Esta semana hemos tenido el gusto de poder trabajar con el Dr. Finn-Arne Weltzien, profesor del Department of Basic Sciences and Aquatic Medicine de la Norwegian University of Life Sciences (NMBU) de Oslo (Noruega) y experto en endocrinología de la reproducción de peces. Hemos podido avanzar en la redacción de artículos y abstracts para próximos congresos, así como intercambiar ideas para futuros proyectos. Gracias Finn.

martes, 3 de diciembre de 2013

Víctor Gallego defiende su Tesis Doctoral

Ayer Víctor Gallego defendió su Tesis Doctoral titulada: “Sperm physiology and quality in two marine teleosts: Anguilla anguilla & Takifugu niphobles”, sobre diversos aspectos relacionados con el esperma de la anguila y del pez globo, y que he tenido el placer de dirigir.

El tribunal estuvo formado por la Dra. Olvido Chereguini (Presidenta) del Instituto Español de Oceanografía, la Dra. Elsa Cabrita (Secretaria) de la Universidad del Algarve (Portugal), y la Dra. Alicia Felip del Instituto de Acuicultura de Torre de la Sal (CSIC), que tras la exposición y la posterior discusión le concedieron la máxima nota posible: Sobresaliente cum laude.

Víctor ha contado con una beca FPI del MICINN y una beca previa de la UPV.

El documento final es un compendio de 5 artículos previamente publicados (en Aquaculture y Theriogenology), con una introducción y una discusión general, y si me lo pedís por e-mail, podemos enviaros un pdf con el texto completo.


Enhorabuena Dr. Gallego!

sábado, 30 de noviembre de 2013

Celebramos el Día de la Acuicultura 2013 en la UPV

El pasado viernes, y con motivo de la celebración del Día de la Acuicultura, el Microcluster sostenibilidad de recursos acuáticos y acuicultura  "AQUACLUSTER" organizó la Jornada Científico-Técnica "Retos y Avances en la Acuicultura Valenciana".


Contamos con la presencia de investigadores, alumnos de distintas universidades y representantes de empresas y de la administración. Asimismo, alrededor de una treintena de personas siguieron la sesión mediante un sistema on-line.
Se realizaron 11 presentaciones orales a cargo de investigadores de los distintos centros valencianos (Universitat Politècnica Valencia, Universitat de València, Universidad de Alicante, Instituto de Acuicultura Torre de la Sal (CSIC) y MAREMAR) hicieron un repaso de las novedades en sus investigaciones. También se expusieron posters ("Investigación valenciana en acuicultura por el mundo") en los que se mostraron resultados recientes previamente publicados en congresos científicos internacionales.



La Jornada acabó con una comida con productos de acuicultura preparados por los alumnos del Master Interuniversitario de Acuicultura (lo que se va convirtiendo en una tradición) y de los que dimos buena cuenta. Mirad qué pinta!. Gracias chicos!.

Recibimos la visita de Jacky Cosson

Esta semana hemos contado con la presencia del Dr. Jacky Cosson, investigador de la University of South Bohemia (República Checa).
El lunes pudimos disfrutar de su conferencia titulada "Cell Motility and Cytoskeleton" sobre los conocimientos actuales sobre la activación del esperma y la regulación de las características del movimiento del flagelo, especialmente en peces. Asistimos miembros del equipo de Acuicultura y Biodiversidad, investigadores de la Universitat de València y de la empresa PROISER R+D, S.L., que se dedica al diseño de software para la evaluación de la motilidad espermática.
El jueves impartió un seminario para los alumnos del Máster Interuniversitario de Acuicultura y que tituló "Sperm activation and regulation of flagella movement" y aprovechó para hablarnos de las nuevas instalaciones de investigación de la Faculty of Fisheries and Quality of Water of Univ. of South Bohemia y de sus programas de doctorado y postdoctorado.

El resto de la semana lo hemos dedicado a intercambiar impresiones sobre resultados recientes y sobre posibles colaboraciones.

jueves, 28 de noviembre de 2013

Se publica el Libro de resúmenes de las Primeras Jornadas españolas de la anguila

Las Primeras Jornadas españolas de la anguila se celebraron del  28 al 30 de septiembre de 2010, en el Palacio Miramar de Donostia-San Sebastián organizadas por AZTI-Tecnalia como un encargo de la Subdirección de Biodiversidad del Ministerio de Medio Ambiente Rural y Marino.
Ahora se ha publicado un libro que recoge los resúmenes de las presentaciones realizadas durante las jornadas dentro de 5 temáticas: Planes de gestión, Métodos para el seguimiento y gestión de la anguila, Acuicultura y Comercialización, Pesca, Investigación y Medidas de gestión.

domingo, 24 de noviembre de 2013

Recibimos la visita de Ákos Horváth

La semana pasada disfrutamos de la visita del Dr. Ákos Horváth, profesor de la Szent István University, en Gödöllő (Hungría). Se trata de un destacado espermatólogo de peces con una amplia experiencia en la congelación de esperma de numerosas especies, fundamentalmente de agua dulce.


Su equipo publicó hace unos años un protocolo (*) para la congelación de esperma de anguila muy diferente al desarrollado por nuestro equipo. Gracias a la financiación de la Acción COST AQUAGAMETE (de la que es ViceChair) el Dr. Ákos ha podido venir durante unos días a Valencia donde hemos podido congelar las mismas muestras de esperma de anguila con ambos protocolos. A falta de un estudio epigenético de las muestras congeladas, el protocolo de nuestros colegas húngaros parece funcionar bastante mejor. Gracias Ákos!.



(*) Cryopreservation of Sperm of Farmed European Eel Anguilla anguilla; Müller et al., 2004.

viernes, 22 de noviembre de 2013

Nuestro último artículo, aceptado en Journal of Applied Ichthyology

Larval width as indicator of growth rate and effect of larval classification on final body composition and flesh quality in cultured gilthead sea-bream (Sparus aurata, L.).

I. Mazzeo, Y.J. Borrell, V. Gallego, C. García Fernández, J.A. Sánchez, G. Blanco, L. Pérez, J.F. Asturiano

The objective of this study was evaluating the effects of separating larvae according to larval width on growth rate and flesh quality in cultured gilthead sea-bream (Sparus aurata, L.).
Progeny from two broodstocks (A and B) were divided according to larval width into two groups, heads (being the biggest specimens) and tails. After 18 months, both groups were analyzed to evaluate growth, carcass traits and proximal composition.


The head specimens reached a bigger size and showed a greater level of well-being and degree of nourishment. The total body and fillet composition was found to be that generally expected for this species. Some differences were found in total body composition between head and tail specimens in both batches, and in fillet composition in batch B (higher fat and lower moisture content in head specimens).

Sensory analyses were carried out with untrained panelists. They were unable to distinguish between the head and tail samples in batch A, whereas in batch B differences were noticed. The panelists judged samples from the head group to be tastier and juicier, a consequence of their higher fat content.


Hence, fish separation according to larval width is an effective tool to separate progeny with slow and fast growing, whereas total body and fillet analyses and sensory test allow us to ensure that selection does not generate any negative effects on the product quality. 

Jornada Científico-Técnica “Retos y Avances en la Acuicultura Valenciana”

Con motivo de la celebración del Día de la Acuicultura, la Xarxa Valenciana d´Investigació en Aqüicultura (XAVIA) y el Microcluster Sostenibilidad de Recursos Acuáticos y Acuicultura han organizado la Jornada Científico-Técnica “Retos y Avances en la Acuicultura Valenciana”. Tendrá lugar el próximo viernes 29 de noviembre en el aula 2 del Departamento de Ciencia Animal de la UPV (edificio 7G).

El programa previsto es el siguiente:

10.00.- Situación Actual y Futuro de la Acuicultura Valenciana. Miguel Jover. Universitat Politècnica Valencia
10.20.- Avances en la reproducción de la anguila. Luz Pérez. UPV
10.40.- Gestión sostenible de la pesca local y la acuicultura. Pablo Sánchez. Universidad de Alicante
11.00.- Sanidad animal en la acuicultura actual: microbiología y parasitología. Elena Alcaide/Francisco Montero. Universitat de Valencia

Café

12.00.- Estimación de biomasa en jaulas. Víctor Espinosa. UPV
12.20.- Modelos de crecimiento en peces. Vicente Estruch. UPV
12.40.- Crecimiento de la dorada sin harina de pescado. Ana Tomás. UPV
13.00.- Acidos grasos n-3 en acuicultura. Juan Carlos Navarro. Instituto de Acuicultura Torre de la Sal (CSIC)
13.40.- Producción multi-trófica en acuicultura. Miguel Rodilla. UPV
14.00.- La visión económica de la acuicultura. Fernando Pemartín. MAREMAR
14.20.- Gastronomía y acuicultura. Puri García. UPV

Sesión de posters: “Investigación valenciana en acuicultura por el mundo”. Exposición de poster presentados en los últimos congresos científicos por investigadores de instituciones de investigación valencianas.

Certificado de asistencia para estudiantes y becarios (Inscripción: mjover@dca.upv.es)

Dirigido a: Empresas Acuicultura / Investigadores / Estudiantes / Consumidores / Prensa

martes, 19 de noviembre de 2013

Recibimos la visita de nuestras colegas del MNHN de París

Durante esta última semana hemos disfrutado de unos días con nuestras colegas francesas Sylvie Dufour y Anne-Gaelle Lafont (en la foto, segunda y tercera desde la derecha, respectivamente) de la Unidad de Investigación BOREA (Biology of Aquatic Organisms and Ecosystems), del Museo de Historia Natural de París.
Hemos podido repasar resultados obtenidos en el proyecto PRO-EEL e identificar puntos pendientes de ese proyecto. Asímismo, hemos trabajado en la preparación de una solicitud de un futuro proyecto.
Su estancia ha sido financiada como short term scientific missions por la Acción COST AQUAGAMETE.
Ha sido un placer personal y profesional. Hasta pronto!.

martes, 12 de noviembre de 2013

Empieza la inscripción de la 5ª edición del Curso de Experto Universitario en Acuicultura de la UPV

Empieza la inscripción de la 5ª edición del Curso de Experto Universitario en Acuicultura de la Universidad Politécnica de Valencia y además este año por primera vez se crea el Diploma de Especialización en Acuicultura. Como novedades este año además de la Nutrición y Alimentación, Reproducción de peces, Ingeniería acuícola, Diseño de instalaciones y Acuicultura sostenible, en el diploma tenemos dos nuevas materias que complementan muy bien el curso, Patología de peces y Gestión de piscifactorías. Tenéis toda la información en www.cursodeacuicultura.upv.es

martes, 5 de noviembre de 2013

Nuestro último artículo, aceptado en Aquaculture

Intracellular changes in Ca2+, K+ and pH after sperm motility activation in the European eel (Anguilla anguilla): preliminary results

V. Gallego, F. Martínez-Pastor, I. Mazzeo, D.S. Peñaranda, M.P. Herráez, J.F. Asturiano and L. Pérez

Although it is widely accepted that osmolality and ion fluxes are the main factors triggering sperm motility in fish, a complex universal mechanism for sperm motility activation does not exist in fish, and studies of marine fish species are even more scarce. Therefore, the main goal of this study was to estimate the intracellular variations in the main ions involved in sperm activation for the first time in European eel, in order to provide additional new data about this little-known process.
It was observed that levels of intracellular Ca2+ and K+ sperm ions increased significantly 30 s after the hyperosmotic shock compared to baseline levels, and remained at this level until 120 s post-activation. In contrast, the intracellular pH remained constant during the first 30 s, and decreased gradually at 60 and 120 s postactivation. Our data agree with the current main theory for explaining motility activation in marine fish, in which internal fluctuations of Ca2+ and K+ seem to participate in sperm activation. In addition, fluorescent images showed that both Ca2+ and K+ were concentrated in the apical area of the sperm head, which corresponds to the location of the eel sperm mitochondria, suggesting this organelle plays an important role in sperm motility activation.

domingo, 3 de noviembre de 2013

7th SSC Meeting del PRO-EEL en París


De miércoles a viernes de la pasada semana hemos acudido al 7th SSC Meeting del Proyecto PRO-EEL, que ha reunido a los responsables de los distintos grupos de investigación participantes.
La Dra. Sylvie Dufour nos ha acogido amablemente en las instalaciones del Museo de Historia Natural de París, donde se han celebrado las reuniones.

Hemos intercambiado información sobre los avances alcanzados por cada uno de los grupos participantes en el último periodo y se han identificado las tareas pendientes para los últimos meses del PRO-EEL.

domingo, 27 de octubre de 2013

Web del 10th International Symposium on Reproductive Physiology of Fish

Los organizadores del 10th ISRPF han dispuesto una página web en la que podréis encontrar toda la información referente a este congreso: http://ccmar.ualg.pt/10isrpf/, incluida la información referente al formato de los abstracts, el deadline para su envío, etc.

miércoles, 2 de octubre de 2013

Mamen Vílchez defiende su Tesis de Máster


Nuestra compañera y becaria predoctoral Mamen Vílchez defendió ayer su Tesina Fin del Máster Interuniversitario de Acuicultura titulada: Efecto del régimen térmico en la calidad de los huevos y desarrollo embrionario de la anguila europea (Anguilla anguilla) dirigido por Luz Pérez (ausente por un viaje de trabajo).
Entre los resultados del trabajo está el nacimiento de las primeras larvas de anguila en España (en la foto).

El tribunal que evaluó la Tesina de Mamen le concedió una calificación de Sobresaliente (9.5). Enhorabuena Mamen y Luz!!

Free FP7-funded Aquaculture Training Course on Chromosome Set Manipulation and Gamete Collection


Applications are now being accepted for the third training course organised by the FP7-funded AQUAEXCEL (Aquaculture Infrastructures for Excellence in European Fish Research) project. The course, The Application of Chromosome Set Manipulations and the Importance of Gamete Collection and Management in Aquaculture, will be hosted by the Institute of Aquaculture (IoA) at University of Stirling, Scotland, on 18-22 November 2013. Additional inputs will be provided by scientists based at l’Institut National de la Recherche Agronomique (INRA), France, and the Institute of Marine Research (IMR), Norway. Course attendance is free, thanks to EC Seventh Framework Programme (FP7) funding.

AQUAEXCEL aims to integrate key aquaculture research infrastructures across Europe in order to promote their coordinated use and development. AQUAEXCEL is organising four pioneering new technical training courses in total, with each course focusing on different aspects of aquaculture experimentation. These courses are unique in putting emerging aquaculture infrastructure centres of excellence at the forefront. They also present a valuable opportunity for researchers and technicians in this field to further their experience.

Chromosome Set Manipulation (CSM) technology is used in fish and shellfish aquaculture and has important applications in the development of unique genotypes for basic research (haploid, meiotic and mitotic gynogenetic and androgenetic individuals) and direct commercial applications to the aquaculture industry (sterile triploids and investigation and manipulation of sex-determination systems e.g. YY males). The Application of Chromosome Set Manipulations and the Importance of Gamete Collection and Management in Aquaculture course will give practical training in the collection, handling and storage of gametes for these purposes, from a range of species, but with a focus on salmonids and tilapias as examples.

The course is aimed at participants who want to gain experience in gamete handling and management and the application of CSM techniques in the course of their work or research.

Course attendance is free, thanks to EC FP7 funding. Participants are expected to pay for their own travel, subsistence and accommodation. Participants are requested to submit their CV and a brief letter outlining their motivation for wanting to attend the course. Please find attached to this email the course information leaflet and registration form. For more information and online registration, please visit www.aquaexcel.eu/training_courses.

The first AQUAEXCEL course, which focused on Recirculating Aquaculture System (RAS) Technology and was provided by Wageningen University (WU), the Netherlands, with expertise from the Norwegian Institute of Food, Fishery and Aquaculture (Nofima), l’Institut Francais de Recherche Pour l’Exploitation de la Mer (IFREMER) and the Institute for Marine Resources and Ecosystem Studies (IMARES), was very successful and oversubscribed. The second AQUAEXCEL training course: Contribution of Genomic Approaches to the Development of Sustainable Aquaculture for Temperate and Mediterranean Fish, will be hosted by the Institut National de la Recherche Agronomique (INRA) in Rennes, France, on 16-18 October 2013. The final course, Efficient Utilisation of New Monitoring and Control Systems in Fish Experiments, will be provided by The Norwegian University of Science and Technology (NTNU) and SINTEF Sealab, on 19-22 May 2014. Registration for this course will open in January 2014.