Catálogo de datos del IEO
Creation year
2017
228 record(s)
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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 and Bay of Biscay sardine stock and an index for the southern and western sardine 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.
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Campaña: 3LNO GROUNDFISH SURVEY (FLETAN NEGRO 3L 2017) 3LNO GROUNDFISH SURVEY (FLETAN NEGRO 3L 2017)
The surveys on NAFO Regulatory Area of Div. 3L (Flemish Pass) were initiated by Spain in 2003. The surveys were carried out by the R/V “Vizconde de Eza” following the same procedures and using the same bottom trawl net type Campelen. The main objectives of this survey time series are: a) to obtain abundance indices of the main exploited species, b) to study the structure and distribution of these demersal species in the area.
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They focus on the seabed research of the Cantabria, both indirect and direct. Carry out a survey of the fishing beaches to later elaborate fishing charts. Systematic bathymetric survey of the study areas with 100% coating (Multi-beam echo sounder EM-302). seismic profiles according to the ship's defeat (Topas 710 system). Performance of sound velocity profiles in the water column. Side sweep sonar in selected areas. Sediment sampling (Shipeck dredges - Box corer). Sampling of Rocky Outcrops (Rock Dredge).
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Spanish Porcupine bottom trawl survey aims to collect data on the distribution and relative abundance, and biological information of commercial fish in Porcupine bank area (ICES Division VIIb-k). The primary target species are hake, monkfish, white anglerfish and megrim, which abundance indices are estimated by age, with abundance indices also estimated for Nephrops, four-spot megrim and blue whiting. Data collection is also collected for several other demersal fish species and invertebrates.
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The main objective is the collection of data that allow estimate the abundance, biomass and demographic structure of the species of commercial interest in the regulation area NAFO, until a maximum depth of 1500 m.
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The main objective is to know the state of the populations of the species objective: their abundance, biomass and demographic structure, and the conditions oceanographic in the Bank. Species objective: Gadus Morhua, Sebastes Marinus, Sebastes Mentella, Sebastes fasciatus, Hippoglossoides Platessoides, Reinhardtius Hippoglossoides, Macrourus berglax and Pandalus borealis.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.