Could Biscay Bay Anchovy recruit through a spatial loophole?

Irigoien, Xabier; Fiksen, Øyvind; Cotano, Unai; Uriarte, Andrés; Álvarez, Paula; Arrizabalaga, Haritz; Boyra, Guillermo; Santos, M.B.; Sagarmínaga, Yolanda; Othéguy, Pantxika; Etxebeste, Egoitz; Zarauz, L.; Artetxe, I.; Motos, Lorenzo

doi:10.1016/j.pocean.2007.04.011

Cited by 64 publications

(77 citation statements)

References 27 publications

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“…Several studies had been made for cod, sprat and haddock (Hinrichsen et al 2002, Baumann et al 2006, Lough et al 2006 in the Baltic sea and the George Bank. In the area of the Bay of Biscay, Allain et al (2007a,b) and Irigoien et al (2007 and focused these studies on anchovy. Contradictory conclusions on the effect of offshore drift on anchovy recruitment are a matter of discussion.…”

Section: Discussionmentioning

confidence: 99%

The fate of eggs and larvae of three pelagic species, mackerel (Scomber scombrus), horse mackerel (Trachurus trachurus) and sardine (Sardina pilchardus) in relation to prevailing currents in the Bay of Biscay: Could they affect larval survival?

Álvarez¹,

Chifflet²

2012

Sci. Mar.

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SUMMARY:The spatial distribution of eggs and larvae of three pelagic species, mackerel, horse mackerel and sardine, in the Bay of Biscay was studied in 1998, 2001 and 2004. The spatial distribution was clearly different between the years studied and corresponds quite precisely to different water circulation regimes. Mackerel and horse mackerel larvae are more affected by the prevailing currents than sardine, as their spawning grounds are located offshore, far from the shelf break where the current velocities are higher. Survival rates for mackerel and horse mackerel were higher in 2001, when the offshore larval transport was stronger. However, for sardine, the mortality rate hardly varied between years. The abundance of 25-day-old larvae, considered as an index of the survival rate, appears to be a good recruitment indicator, at least for 1998, 2001 and 2004. Our results did not support the hypothesis of Bakun (1996), which states that dispersion of early life stages towards open ocean waters should cause high larval mortality. At least under the conditions observed for the years studied, the retention of larvae offshore appears to have a positive effect on larval growth and/or survival.Keywords: ichthyoplankton, Bay of Biscay, survival rates, larval transport, recruitment. RESUMEN: El dEstino dE huEvos y larvas dE trEs EspEciEs pElágicas caballa, (Scomber ScombruS), jurEl (TrachuruS TrachuruS) y sardina (Sardina pilcharduS) En rElación a las corriEntEs prEvalEntEs En El árEa dEl golfo dE vizcaya. ¿podrían afEctar a la supErvivEncia larvaria? -La distribución espacial de los huevos y larvas de tres especies pelágicas, caballa, jurel y sardina en el Golfo de Vizcaya fue estudiada en 1998, 2001 y 2004. Esta distribución espacial fue claramente diferente entre los años estudiados y se ajustan, bastante bien a los diferentes regímenes de circulación. Las larvas de caballa y jurel resultaron más directamente afectadas por estas corrientes prevalentes que las larvas de sardina. Esto se explica porque las sardinas desovan en la plataforma, relativamente alejadas del cantil, donde las velocidades de las corrientes son más altas. Las tasas de supervivencia larvaria de caballa y jurel fueron superiores en 2001, cuando el transporte de larvas offshore era más importante. Para las larvas de sardina, sin embargo, la tasa de mortalidad apenas varió entre años. La abundancia de larvas mayores de 25 días, considerada aquí como un índice de la tasa de supervivencia larvaria, resultó ser un buen indicador del reclutamiento por lo menos para los años estudiados. Nuestros resultados contradicen la teoría de Bakun (1996), que afirma que la dispersión de las etapas de vida temprana hacia las aguas del océano abierto causa una alta mortalidad larvaria. Por lo menos bajo la condición que se observó durante estos años (temperatura y abundancia de alimento), la retención de larvas en mar abierto parece tener un efecto positivo en el crecimiento larvario y/o supervivencia.

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Section: Discussionmentioning

confidence: 99%

The fate of eggs and larvae of three pelagic species, mackerel (Scomber scombrus), horse mackerel (Trachurus trachurus) and sardine (Sardina pilchardus) in relation to prevailing currents in the Bay of Biscay: Could they affect larval survival?

Álvarez¹,

Chifflet²

2012

Sci. Mar.

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“…The earliest checks are formed in autumn (OctoberDecember) when anchovy juveniles move from the surface waters over wide regions of the Bay of Biscay to deeper and more coastal waters where they overwinter (Uriarte et al 2001;Irigoien et al 2007). This change may induce a first check, associated with either a change in water temperature or temporary poor feeding conditions.…”

Section: Checksmentioning

confidence: 99%

Validation of age determination using otoliths of the European anchovy (Engraulis encrasicolus L.) in the Bay of Biscay

Uriarte

Rico

Villamor

et al. 2016

Mar. Freshwater Res.

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Abstract. Validation of the age determination procedure using otoliths of European anchovy in the Bay of Biscay was achieved by monitoring very strong year-classes in successive spring catches and surveys, as well as the seasonal occurrence of edge types. Historical corroboration of the ageing method was obtained by cross-correlation between successive age groups by year-classes in catches and surveys . Summary annual growth in length is also presented. Yearly annuli consist of a hyaline zone (either single or composite) and a wide opaque zone, disrupted occasionally by some typical checks (mainly at age-0 and age-1 at peak spawning time). Age determination, given a date of capture, requires knowledge of the typical annual growth pattern of otoliths, their seasonal edge formation by ages and the most typical checks. Most opaque growth occurs in summer and is minimal (translucent) in winter. Opaque zone formation begins earlier in younger fish (in spring), and this helps distinguish age-1 from age-2þ.

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“…Adult anchovies usually spawn on the continental shelf dur- ing spring. After a planktonic phase, juveniles start forming monospecific schools and leaving the continental shelf to reach oceanic waters (Irigoien et al, 2007) from early August onwards. This shift from the continental shelf to oceanic waters explains the higher consumption of juvenile anchovy by bluefin tunas in the second half of the summer.…”

Section: Discussionmentioning

confidence: 99%

A new compilation of stomach content data for commercially important pelagic fish species in the northeast Atlantic

Pinnegar

Goñi

Trenkel

et al. 2015

Earth Syst. Sci. Data

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Abstract. There is increasing demand for information on predator-prey interactions in the ocean as a result of legislative commitments aimed at achieving sustainable exploitation. However, comprehensive data sets are lacking for many fish species and this has hampered development of multispecies fisheries models and the formulation of effective food-web indicators. This work describes a new compilation of stomach content data for five pelagic fish species (herring, blue whiting, mackerel, albacore and bluefin tuna) sampled across the northeast Atlantic and submitted to the PANGAEA open-access data portal (www.pangaea.de). We provide detailed descriptions of sample origin and of the corresponding database structures. We describe the main results in terms of diet composition and predator-prey relationships. The feeding preferences of small pelagic fish (herring, blue whiting, mackerel) were sampled over a very broad geographic area within the North Atlantic basin, from Greenland in the west, to the Lofoten Islands in the east and from the Bay of Biscay northwards to the Arctic. This analysis revealed significant differences in the prey items selected in different parts of the region at different times of year. Tunas (albacore and bluefin) were sampled in the Bay of Biscay and Celtic Sea. Dominant prey items for these species varied by location, year and season. This data compilation exercise represents one of the largest and most wide-ranging ever attempted for pelagic fish in the North Atlantic. The earliest data included in the database were collected in 1864, whereas the most recent were collected in 2012. Data sets are available at

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Could Biscay Bay Anchovy recruit through a spatial loophole?

Cited by 64 publications

References 27 publications

The fate of eggs and larvae of three pelagic species, mackerel (<i>Scomber scombrus</i>), horse mackerel (<i>Trachurus trachurus</i>) and sardine (<i>Sardina pilchardus</i>) in relation to prevailing currents in the Bay of Biscay: Could they affect larval survival?

The fate of eggs and larvae of three pelagic species, mackerel (<i>Scomber scombrus</i>), horse mackerel (<i>Trachurus trachurus</i>) and sardine (<i>Sardina pilchardus</i>) in relation to prevailing currents in the Bay of Biscay: Could they affect larval survival?

Validation of age determination using otoliths of the European anchovy (Engraulis encrasicolus L.) in the Bay of Biscay

A new compilation of stomach content data for commercially important pelagic fish species in the northeast Atlantic

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