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Keyword
flow meters
113 record(s)
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Mantenimiento de los colectoresprofundos de langosta, obtención de larvas filosomas y filmaciones submarinas con video cebado.
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Mantenimiento de los colectoresprofundos de langosta, obtención de larvas filosomas y filmaciones submarinas con video cebado.
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Oceanographic survey collected in the framework of the following research project: ¿Métodos de Producción de Huevos. Estimación de la biomasa de especies pelágicas de interés comercial: sardina, anchoa, caballa y jurel (ICTIOEVA)¿. This Project is funded by the Instituto Español de Oceanografía and the main scientific objective the survey is to produce an index and a direct estimate of the spawning stock biomass of Sardine (Sardine pilchardus) in the Cantabrian Sea and Bay of Biscay (to 45ºN) using the Daily Egg Production Method (DEPM). Specific aims:a) To estimate the spawning area distribution of sardine and the daily egg production. b) To collect adults to obtain fecundity estimation c) Distribution and abundance of other commercial species of interest: mackerel, horse mackerel and anchovy.d) To describe the oceanographic and meteorological character of the area of study with the aim of relating environmental conditions (temperature, salinity, currents) with the spatial distribution of the ichthyoplankton
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Main objectives: Estímate egg abundance for mackerel and horse mackerel in surveyed area Estimate sardine spawning area in surveyed area by CUFES Collect mackerel adult samples to estimate adult parameters by pelagic trawls Secondary objectives: Estimate egg and larva abundances for sardine, anchovy, hake Measure the salinity , temperature depth in the water column using ctd
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Main objectives: Estímate egg abundance for mackerel and horse mackerel in surveyed area Secondary objectives: Estimate egg and larva abundances for sardine, anchovy, hake Measure the salinity , temperature depth in the water column using ctd
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Prospecting Scomber scombrus and Trachurus trachurus eggs and adult catches to estimate egg production and fecundity of Scomber scombrus for joint international evaluation of spawning stock biomass of mackerel by the method annual egg production (MPAH) and production eggs Trachurus.
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Prospecting Scomber scombrus and Trachurus trachurus eggs and adult catches to estimate egg production and fecundity of Scomber scombrus for joint international evaluation of spawning stock biomass of mackerel by the method annual egg production (MPAH) and production eggs Trachurus.
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Mantenimiento de los colectoresprofundos de langosta, obtención de larvas filosomas y muestreo con dragas en maerl.
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Mantenimiento de los colectoresprofundos de langosta, obtención de larvas filosomas y filmaciones submarinas con video cebado.
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The main objective of this series of individual cruises is to produce both an index and a direct estimate of the biomass of the north east Atlantic mackerel stock and an index for the southern and western horse mackerel stocks. The general method is to quantify the freshly spawned eggs in the water column on the spawning grounds. Report egg species identification and staging. To be able to establish a relationship between eggs and biomass of the spawning stock, the fecundity of the females must also be determined. The realised fecundity is used in combination with the calculated number of freshly spawned eggs in the water to render an estimate of the spawning stock biomass. To provide reliable estimates of the quantity of spawned eggs and the fecundity an extensive coverage of the spawning area is required both in time and space. Provide temperature data from the CTD casts will be used for the egg ageing procedure. Other environmental variables will be used for hydrographic and spawning area characterization.