scholarly journals Revisión taxonómica de la ictiología marina de Galicia: Clase Actinopteri (Orden Trachiniformes al Orden Tetraodontiformes)

2021 ◽  
pp. 77-104
Author(s):  
Rafael Bañón Díaz ◽  
Toño Maño
Keyword(s):  
Trachurus Trachurus ◽  
Scomber Scombrus

En este trabajo se realiza una revisión taxonómica de los peces óseos de Galicia (Clase Actinopteri) del Orden Trachiniformes al Orden Tetraodontiformes, a través de los distintos tratados y publicaciones ictiológicas publicadas a lo largo de la historia. Se listan un total de 188 especies, de las cuales 5 se consideran dudosas, al no estar su presencia suficientemente demostrada. Una revisión de la bibliografía y nomenclatura científica nos ha permitido citar nuevas especies para Galicia y reasignar antiguas denominaciones a nuevas especies, subsanando errores de identificación de otros autores. El orden Perciformes, con 145 especies, es el más numeroso de los peces de Galicia. A este orden pertenecen especies de alto interés comercial como el jurel Trachurus trachurus y la caballa Scomber scombrus. El listado también incluye también los primeros registros para Galicia de especies de carácter tropical desplazadas hacia el norte debido al cambio climático a lo largo de estas últimas décadas. Algunas de estas especies son el jurelo azul Caranx crysos, el pez globo Lagocephalus laevigatus y el mero tropical Epinephelus aeneus.

scholarly journals Offshore wind farms and the attraction–production hypothesis: insights from a combination of stomach content and stable isotope analyses

Hydrobiologia ◽  
2021 ◽  
Author(s):  
Ninon Mavraki ◽  
Steven Degraer ◽  
Jan Vanaverbeke
Keyword(s):  
Stable Isotope ◽  
Stomach Content ◽  
Wind Farms ◽  
Offshore Wind ◽  
Artificial Reefs ◽  
Dietary Composition ◽  
Trachurus Trachurus ◽  
Offshore Wind Farms ◽  
Scomber Scombrus ◽  
Isotope Analyses

AbstractOffshore wind farms (OWFs) act as artificial reefs, attracting high abundances of fish, which could potentially increase their local production. This study investigates the feeding ecology of fish species that abundantly occur at artificial habitats, such as OWFs, by examining the short- and the long-term dietary composition of five species: the benthopelagic Gadus morhua and Trisopterus luscus, the pelagic Scomber scombrus and Trachurus trachurus, and the benthic Myoxocephalus scorpioides. We conducted combined stomach content and stable isotope analyses to examine the short- and the time-integrated dietary composition, respectively. Our results indicated that benthopelagic and benthic species utilize artificial reefs, such as OWFs, as feeding grounds for a prolonged period, since both analyses indicated that they exploit fouling organisms occurring exclusively on artificial hard substrates. Trachurus trachurus only occasionally uses artificial reefs as oases of highly abundant resources. Scomber scombrus does not feed on fouling fauna and therefore its augmented presence in OWFs is probably related to reasons other than the enhanced food availability. The long-termed feeding preferences of benthic and benthopelagic species contribute to the hypothesis that the artificial reefs of OWFs could potentially increase the fish production in the area. However, this was not supported for the pelagic species.

scholarly journals Lipid Composition Of Two Marine Fishes – Scomber scombrus And Trachurus trachurus

2008 ◽  
Vol 1 (3) ◽  
Author(s):  
O Njoku ◽  
I C Ononogbu ◽  
C U Ibe ◽  
BC Nwanguma ◽  
AV Iwueke
Keyword(s):  
Lipid Composition ◽  
Marine Fishes ◽  
Trachurus Trachurus ◽  
Scomber Scombrus

Estimating natural interstage egg mortality of Atlantic mackerel (Scomber scombrus) and horse mackerel (Trachurus trachurus) in the Northeast Atlantic using a stochastic model

2007 ◽  
Vol 64 (12) ◽  
pp. 1656-1668 ◽  
Author(s):  
Enrique Portilla ◽  
Eddie McKenzie ◽  
Doug Beare ◽  
Dave Reid
Keyword(s):  
Process Model ◽  
Mortality Rates ◽  
Horse Mackerel ◽  
Fish Biomass ◽  
Trachurus Trachurus ◽  
Northeast Atlantic ◽  
Egg Mortality ◽  
Atlantic Mackerel ◽  
Scomber Scombrus ◽  
Egg Stages

Egg mortality is a key parameter for understanding early life histories of fish. Small variations in estimated mortality cause large differences on adult fish biomass estimates. Therefore, the assumption of a constant egg mortality rate may be misleading. Here, we show how to estimate mortality rates for the individual egg stages of Atlantic mackerel (Scomber scombrus) and horse mackerel (Trachurus trachurus) from triennial surveys conducted since 1977. We use a standard, continuous-time Markov process model that combines the numbers of eggs sampled in each stage with experimental data on egg stage duration (dependent on water temperature). This is the first attempt to study mortality among egg stages in such detail and the first comprehensive effort to estimate horse mackerel egg mortality in the Northeast Atlantic. The results include detailed descriptions of spatial–temporal dependencies in mortality. The daily egg mortality rates estimated are ~0.56·day–1 for Atlantic mackerel (far higher than suggested in the literature) and 0.54·day–1 for horse mackerel. Although it was not possible to estimate stage 1 egg mortality directly, the results suggest high mortality in the first stage. This might lead to underestimation of fish biomass when assessed traditionally by egg survey data alone.

scholarly journals Estimation of mackerel (Scomber scombrus L., 1758) and horse mackerel (Trachurus trachurus L., 1758) daily egg production outside the standard ICES survey area

2005 ◽  
Vol 62 (8) ◽  
pp. 1705-1710 ◽  
Author(s):  
Leonie Dransfeld ◽  
Oonagh Dwane ◽  
John Molloy ◽  
Sarah Gallagher ◽  
Dave G. Reid
Keyword(s):  
Egg Production ◽  
Horse Mackerel ◽  
Survey Area ◽  
Trachurus Trachurus ◽  
Spawning Activity ◽  
International Standard ◽  
Scomber Scombrus ◽  
Rockall Trough

Abstract An experimental egg survey was carried out to assess whether there was significant spawning of mackerel and horse mackerel outside the area surveyed triennially by the international mackerel and horse mackerel standard egg survey. In all, 170 stations were sampled in May 2002 on the Porcupine, Rockall, and Hatton Banks, over the Rockall Trough, and in Faroese waters, with 38 control stations inside and 132 stations outside the standard survey area. There was some spawning of mackerel south and east of the Rockall Bank and southeast of the Faroe Bank, extending to west of the Scottish Shelf. Limited horse mackerel egg production was found west of the Rockall Bank and south of the Faroe Bank. The total mackerel and horse mackerel daily egg production estimated from samples collected in 2002 outside the standard survey area was low compared with the egg production estimated in adjacent waters just inside the standard area in the same year and during the international standard surveys in May and June of 2001. The results suggest that including the spawning activity of both species outside the standard survey area would not significantly contribute to the total estimated egg production.

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