Spanish Research Report for 2017

Spanish catch and effort information used in this Report is based on the logbook data contributed by the Spanish Administration. The logbooks information for 2017 was available haul by haul. Table 1 presents the Spanish catches by species and Division in 2017 in NAFO Regulatory Area. Total effort of the Spanish fleet in 2017 was 1,037 fishing days. In 2017, IEO scientific observers were on board 329 fishing days that it means 32 % of the Spanish total effort. All length, age and biological information presented in this paper is based on sampling carried out by IEO scientific observers. In 2017, 483 samples were taken with 57,988 individuals of different species examined (Table 2)

Spanish Research Report for 2021

Spanish catch and effort information used in this Report is based on the preliminary logbook data contributed by the Spanish Administration. The logbooks information for 2021 was available haul by haul. Total effort of the Spanish fleet in 2021 was 1,170 fishing days. Table 1 presents the preliminary Spanish catches by species and Division in 2021 in NAFO Regulatory Area. These catch figures are preliminary, the final catches to carry out the NAFO assessments will be agreed by the NAFO Joint Commission-Scientific Council Catch Estimation Strategy Advisory Group (CESAG)

Spanish Research Report for 2018.

Spanish catch and effort information used in this Report is based on the preliminary logbook data contributed by the Spanish Administration. The logbooks information for 2018 was available haul by haul. Table 1 presents the preliminary Spanish catches by species and Division in 2018 in NAFO Regulatory Area. Total effort of the Spanish fleet in 2018 was 1,082 fishing days. In 2018, IEO scientific observers were on board 279 fishing days that it means 26 % of the Spanish total effort. All length, age and biological information presented in this paper is based on sampling carried out by IEO scientific observers. In 2018, 425 samples were taken with 44,499 individuals of different species examined (Table 2)

Spanish Research Report for 2020

within the National Program of collection, management and use of data in the fisheries sector and support for scientific advice regarding the Common Fisheries Policy.Spanish catch and effort information used in this Report is based on the preliminary logbook data contributed by the Spanish Administration. The logbooks information for 2020 was available haul by haul. Table 1 presents the preliminary Spanish catches by species and Division in 2020 in NAFO Regulatory Area. Total effort of the Spanish fleet in 2020 was 1,200 fishing days. In 2020, IEO scientific observers were on board 31 fishing days that it means 3 % of the Spanish total effort. All length, age and biological information presented in this paper is based on sampling carried out by IEO scientific observers. In 2020, 37 samples were taken with 4816 individuals of different species examined (Table 2).The collection of the data presented in this document has been funded by the European Union through the European Maritime and Fisheries Fund (EMFF)Versión del editor

Spanish Research Report for 2015

Spanish catch information used in this Report is based on the logbook data contributed by the Spanish Administration. Table 1 presents the catches by species and Division in 2015 based on this information. The split of catches and effort between the different gears in this Report are based on information from NAFO observers on board. In 2015 NAFO observers information from 1,272 days was available while total effort of the Spanish fleet in NAFO Regulatory Area was 1,317 days (around 97% coverage). In addition to NAFO observers, IEO scientific observers were on board 320 fishing days that it means 24 % of the Spanish total effort. All length, age and biological information presented in this paper is based on sampling carried out by IEO scientific observers: 576 samples were taken in 2015, with 59,883 individuals of different species examined (Table 2).Postprint0,000

Spanish Research Report for 2019

Spanish catch and effort information used in this Report is based on the preliminary logbook data contributed by the Spanish Administration. The logbooks information for 2019 was available haul by haul. Table 1 presents the preliminary Spanish catches by species and Division in 2019 in NAFO Regulatory Area. Total effort of the Spanish fleet in 2019 was 1,272 fishing days. In 2019, IEO scientific observers were on board 257 fishing days that it means 20 % of the Spanish total effort. All length, age and biological information presented in this paper is based on sampling carried out by IEO scientific observers. In 2019, 376 samples were taken with 45,831 individuals of different species examined (Table 2)

Nitrogen line spectroscopy in O-stars -- III. The earliest O-stars

This is the third paper in a series aiming at the analysis of nitrogen abundances in O-type stars, to enable further constraints on the early evolution of massive stars. We provide first theoretical predictions for the NIV4058/NIII4640 emission line ratio in dependence of various parameters, and confront them with results from the analysis of a sample of early LMC/SMC O-stars. Stellar and wind parameters are determined by line profile fitting of H/He/N lines, exploiting the helium and nitrogen ionization balance. Corresponding synthetic spectra are calculated using the NLTE atmospheric code FASTWIND. Though there is a monotonic relationship between the emission line ratio and Teff, all other parameters being equal, theoretical predictions indicate additional dependencies, most notably, on the nitrogen abundance. These basic predictions are confirmed by results from atmospheric code CMFGEN. The effective temperatures for the earliest O-stars, inferred from the nitrogen ionization balance, are partly considerably hotter than indicated by previous studies. Consistent with earlier results, effective temperatures increase from supergiants to dwarfs for all spectral types in the LMC. The relation between observed NIV4058/NIII4640 emission line ratio and Teff, for a given luminosity class, turned out to be quite monotonic for our sample stars, and fairly consistent with our model predictions. The scatter within a spectral sub-type is mainly produced by abundance effects. Our findings suggest that the Walborn et al. (2002) classification scheme is able to provide a meaningful relation between spectral type and Teff, provided that it is possible to discriminate for the luminosity class. This might be difficult to achieve in low-Z environments such as the SMC, owing to rather low wind-strengths. According to our predictions, the major bias of the classification scheme is due to nitrogen content.Comment: Main paper: 23 pages, 14 figures. Appendix: 20 pages, 20 figures. Accepted by Astronomy & Astrophysic