Institute Ciencias Marinas Of Andalucia Icman Csic

Puerto Real, Spain

Institute Ciencias Marinas Of Andalucia Icman Csic

Puerto Real, Spain
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Ronnestad I.,University of Bergen | Yufera M.,Institute Ciencias Marinas Of Andalucia Icman Csic | Ueberschar B.,Leibniz Institute of Marine Science | Saele O.,National Institute of Nutrition And Seafood Research | Boglione C.,University of Rome Tor Vergata
Reviews in Aquaculture | Year: 2013

Food uptake follows rules defined by feeding behaviour that determines the kind and quantity of food ingested by fish larvae as well as how live prey and food particles are detected, captured and ingested. Feeding success depends on the progressive development of anatomical characteristics and physiological functions and on the availability of suitable food items throughout larval development. The fish larval stages present eco-morpho-physiological features very different from adults and differ from one species to another. The organoleptic properties, dimensions, detectability, movements characteristics and buoyancy of food items are all crucial features that should be considered, but is often ignored, in feeding regimes. Ontogenetic changes in digestive function lead to limitations in the ability to process certain feedstuffs. There is still a lack of knowledge about the digestion and absorption of various nutrients and about the ontogeny of basic physiological mechanisms in fish larvae, including how they are affected by genetic, dietary and environmental factors. The neural and hormonal regulation of the digestive process and of appetite is critical for optimizing digestion. These processes are still poorly described in fish larvae and attempts to develop optimal feeding regimes are often still on a 'trial and error' basis. A holistic understanding of feeding ecology and digestive functions is important for designing diets for fish larvae and the adaptation of rearing conditions to meet requirements for the best presentation of prey and microdiets, and their optimal ingestion, digestion and absorption. More research that targets gaps in our knowledge should advance larval rearing. © 2013 Wiley Publishing Asia Pty Ltd.


Hamre K.,National Institute of Nutrition And Seafood Research | Yufera M.,Institute Ciencias Marinas Of Andalucia Icman Csic | Ronnestad I.,University of Bergen | Boglione C.,University of Rome Tor Vergata | And 2 more authors.
Reviews in Aquaculture | Year: 2013

Despite considerable progress in recent years, many questions regarding fish larval nutrition remain largely unanswered, and several research avenues remain open. A holistic understanding of the supply line of nutrients is important for developing diets for use in larval culture and for the adaptation of rearing conditions that meet the larval requirements for the optimal presentation of food organisms and/or microdiets. The aim of the present review is to revise the state of the art and to pinpoint the gaps in knowledge regarding larval nutritional requirements, the nutritional value of live feeds and challenges and opportunities in the development of formulated larval diets. © 2013 Wiley Publishing Asia Pty Ltd.


Navarro-Guillen C.,Institute Ciencias Marinas Of Andalucia Icman Csic | Moyano F.J.,University of Almeria | Yufera M.,Institute Ciencias Marinas Of Andalucia Icman Csic
Aquaculture | Year: 2015

The aim of this study was to examine patterns of food intake and production of the main digestive enzymes of Senegalese sole larvae under a fixed 12. h light:12. h dark cycle. Daily gut content, soluble protein content and digestive enzyme activities were studied at different times of day in pelagic sole larvae (onset of feeding and 6. days post-hatch; dph) and in benthonic sole post-larvae (20 and 30. dph). The larvae displayed temporal changes in food intake throughout development. Pre-metamorphic larvae ceased feeding after lights were turned off. In contrast, post-metamorphic larvae continued to feed during the day, with a higher food intake occurring during dark phase. It was demonstrated that larval digestive enzymes, mainly lipases, were active before mouth opening. Tryptic activity varied with food intake at pre-metamorphic larvae, whereas its activity levels were kept along the day in post-metamorphic larvae. © 2014 Elsevier B.V.


Macias D.,University of Cádiz | Macias D.,Institute Ciencias Marinas Of Andalucia Icman Csic | Ramirez-Romero E.,University of Cádiz | Garcia C.M.,University of Cádiz
Journal of Marine Research | Year: 2010

An analysis of the induced changes in both total productivity and community structure as a consequence of different pulsed nutrient inputs has been made by using two different ecosystem modeling tools. One was a modified version of the N-based model proposed by Fasham et al. (1990) for pelagic ecosystems and the other the plankton functional type model by Vichi et al. (2007). Both models lead to higher total biomass production with a pulsed nutrient input compared to a continuous supply, affecting both phytoplankton and zooplankton. Detailed responses are, however, different among plankton groups depending on the frequency of pulsed nutrient input and the complexity of the model. The differences in biomass production were higher for an oscillation period of 150-170 days following a sinusoidal supply pattern. A tidal mixing-induced nutrient supply was also simulated by using both models and a larger biomass increment was observed compared to that obtained with the sinusoidal pattern. Finally, a theoretical application of this approach to the pelagic ecosystem of the North Western Alboran Sea shows a preferential selection of diatoms and larger zooplankton under discontinuous nutrient inputs.


Garcia-Munoz C.,Institute Ciencias Marinas Of Andalucia Icman Csic | Lubian L.M.,Institute Ciencias Marinas Of Andalucia Icman Csic | Garcia C.M.,University of Cádiz | Marrero-Diaz A.,University of Las Palmas de Gran Canaria | And 2 more authors.
Polar Biology | Year: 2013

Phytoplankton assemblages around the South Shetland Islands (SSI) were closely related to mesoscale physical features, based on high spatial resolution sampling performed during the summer of 2010. Sampling was done in 8 transects with stations 9 km apart. Phytoplankton groups were described using flow cytometry, FlowCAM and HPLC/CHEMTAX pigment analysis. Nanophytoplankton (2-20 μm) was predominant throughout the study area, which was dominated by small diatoms. They were distributed along the stratified waters of the SSI shelf and in the centre of the Bransfield Strait where an anticyclonic eddy was detected, established between two frontal structures [Bransfield Front and Peninsula Front (PF)]. The highest concentrations correlated with mid-to-high temperatures (1.07 °C) and mid-salinities (34.03) corresponding with Transitional Bellinghausen Water stations. Haptophytes distribution co-varied with small diatoms but also appeared in those vertical mixed stations with Transitional Zonal Water with Weddell Sea influence. A shift from smaller to larger diatoms was detected at the ice edge in the Antarctic Sound. Cryptophytes were restricted to stratified stations of the SSI shelf and those associated with the PF, while small prasinophytes were the only group occupying deeper and colder waters of the Drake Passage, beneath the Antarctic Surface Water, north of a narrow frontal region described here for the first time (Shetland Front). Phytoplankton assemblages around the SSI were strongly connected with the Bransfield Current System, supporting a clockwise circulation around the archipelago. The Bransfield Current System components are permanent structures during the austral summer suggesting that the distribution of phytoplankton, which responds to these structures, must also be a quasi-permanent feature. © 2013 Springer-Verlag Berlin Heidelberg.


Yufera M.,Institute Ciencias Marinas Of Andalucia Icman Csic | Halm S.,Institute Ciencias Marinas Of Andalucia Icman Csic | Beltran S.,University of Barcelona | Fuste B.,University of Barcelona | And 2 more authors.
Marine Biotechnology | Year: 2012

Gilthead seabream (Sparus aurata) is a teleost belonging to the family Sparidae with a high economical relevance in the Mediterranean countries. Although genomic tools have been developed in this species in order to investigate its physiology at the molecular level and consequently its culture, genomic information on post-embryonic development is still scarce. In this study, we have investigated the transcriptome of a marine teleost during the larval stage (from hatching to 60 days after hatching) by the use of 454 pyrosequencing technology. We obtained a total of 68,289 assembled contigs, representing putative transcripts, belonging to 54,606 different clusters. Comparison against all S. aurata expressed sequenced tags (ESTs) from the NCBI database revealed that up to 34,722 contigs, belonging to about 61% of gene clusters, are sequences previously not described. Contigs were annotated through an iterative Blast pipeline by comparison against databases such as NCBI RefSeq from Danio rerio, SwissProt or NCBI teleost ESTs. Our results indicate that we have enriched the number of annotated sequences for this species by more than 50% compared with previously existing databases for the gilthead seabream. Gene Ontology analysis of these novel sequences revealed that there is a statistically significant number of transcripts with key roles in larval development, differentiation, morphology, and growth. Finally, all information has been made available online through user-friendly interfaces such as GBrowse and a Blast server with a graphical frontend. © 2011 Springer Science+Business Media, LLC.


Morris E.P.,Institute Ciencias Marinas Of Andalucia Icman Csic
PloS one | Year: 2013

Inland and transitional aquatic systems play an important role in global carbon (C) cycling. Yet, the C dynamics of wetlands and floodplains are poorly defined and field data is scarce. Air-water CO2 fluxes in the wetlands of Doñana Natural Area (SW Spain) were examined by measuring alkalinity, pH and other physiochemical parameters in a range of water bodies during 2010-2011. Areal fluxes were calculated and, using remote sensing, an estimate of the contribution of aquatic habitats to gaseous CO2 transport was derived. Semi-permanent ponds adjacent to the large Guadalquivir estuary acted as mild sinks, whilst temporal wetlands were strong sources of CO2 (-0.8 and 36.3 mmol(CO2) m(-2) d(-1)). Fluxes in semi-permanent streams and ponds changed seasonally; acting as sources in spring-winter and mild sinks in autumn (16.7 and -1.2 mmol(CO2) m(-2) d(-1)). Overall, Doñana's water bodies were a net annual source of CO2 (5.2 mol(C) m(-2) y(-1). Up-scaling clarified the overwhelming contribution of seasonal flooding and allochthonous organic matter inputs in determining regional air-water gaseous CO2 transport (13.1 Gg(C) y(-1)). Nevertheless, this estimate is about 6 times < local marsh net primary production, suggesting the system acts as an annual net CO2 sink. Initial indications suggest longer hydroperiods may favour autochthonous C capture by phytoplankton. Direct anthropogenic impacts have reduced the hydroperiod in Doñana and this maybe exacerbated by climate change (less rainfall and more evaporation), suggesting potential for the modification of C sequestration.


Marco-Herrero E.,Institute Ciencias Marinas Of Andalucia Icman Csic | Rodriguez A.,Institute Ciencias Marinas Of Andalucia Icman Csic | Cuesta J.A.,Institute Ciencias Marinas Of Andalucia Icman Csic
Zootaxa | Year: 2012

The complete larval development of Macropodia czernjawskii (Brandt, 1880), is described and illustrated for the first time. Larvae were reared in the laboratory and development consisted of two zoeal stages and a megalopa. The main difference in the zoeal stages is the absence of lateral spines on the telson furcae, which allow it to be distinguished from the remaining species of Macropodia as well as from the zoeae of most majoids. Copyright © 2012 Magnolia Press.


Romero-Romero S.,Institute Ciencias Marinas Of Andalucia Icman Csic | Yufera M.,Institute Ciencias Marinas Of Andalucia Icman Csic
Aquaculture | Year: 2012

With the aim of assessing the potential value of gut content in the rotifer Brachionus plicatilis during the standard procedures of enrichment and posterior residence in the larval tanks, we have examined by image analysis the changes in gut volume during the filling and subsequent evacuation process when feed is no more available. The gut filling pattern has been examined at different microalgal concentrations of Nannochloropsis gaditana ranging between 0.4 and 20.8×10 6cellml -1. The rotifer gut was completely filled in 120min and the gut volume became significantly higher in rotifers fed at the highest microalgae concentrations tested. The gut volume accounted for up to 15% of the body volume. When harvested with a non-submerged filter and resuspended in clean seawater, the rotifers evacuated the gut quickly, losing 60% of its content in the first 5min. Contrarily, when the rotifers were rinsed carefully using a submerged filter while maintaining the water volume, the gut was evacuated progressively and needed 1h to lose 60% of the content. Moreover, we have examined the changes in dry mass and energy. After 2h of gut evacuation the rotifers lost 20% of the initial dry weight, and 38% after 24h of starvation. In terms of energy the rotifers lost 43% of the caloric content after 24h of starvation. The findings of this study confirm the importance of performing appropriate feeding protocols to supply living prey of high nutritional quality in larviculture. © 2012 Elsevier B.V.


Macias D.,Institute Ciencias Marinas Of Andalucia Icman Csic | Catalan I.A.,CSIC - Mediterranean Institute for Advanced Studies | Sole J.,CSIC - Mediterranean Institute for Advanced Studies | Morales-Nin B.,CSIC - Mediterranean Institute for Advanced Studies | Ruiz J.,Institute Ciencias Marinas Of Andalucia Icman Csic
Deep-Sea Research Part I: Oceanographic Research Papers | Year: 2011

The north-western Alboran Sea is a highly dynamic region in which the hydrological processes are mainly controlled by the entrance of the Atlantic Jet (AJ) through the Strait of Gibraltar. The biological patterns of the area are also related to this variability in which atmospheric pressure distributions and wind intensity and direction play major roles. In this work, we studied how changes in atmospheric forcing (from high atmospheric pressure over the Mediterranean to low atmospheric pressure) induced alterations in the physical and biogeochemical environment by re-activating coastal upwelling on the Spanish shore. The nursery area of European anchovy (Engraulis encrasicolus) in the NW Alboran Sea, confirmed to be the very coastal band around Malaga Bay, did not show any drastic change in its biogeochemical characteristics, indicating that this coastal region is somewhat isolated from the rest of the basin. Our data also suggests that anchovy distribution is tightly coupled to the presence of microzooplankton rather than mesozooplankton. Finally, we use detailed physical and biological information to evaluate a hydrological-biogeochemical coupled model with a specific hydrological configuration to represent the Alboran basin. This model is able to reproduce the general circulation patterns in the region forced by the AJ movements only including two variable external forcings; atmospheric pressure over the western Mediterranean and realistic wind fields. © 2011 Elsevier Ltd.

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