Mesozooplankton and ichthyoplankton distribution around Gran Canaria, an oceanic island in the NE Atlantic

Rodrı́guez, J.M.; Barton, Eric D.; Eve, L.; Hernández‐León, Santiago

doi:10.1016/s0967-0637(01)00013-9

Cited by 46 publications

(42 citation statements)

References 37 publications

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“…This pattern has also been recently proposed for neritic decapod larvae (Landeira et al, 2009). High values of mesozooplankton biomass have also been recorded in this warm lee (Rodríguez et al, 2001;Hernández-León, 1988).…”

Section: Introductionsupporting

confidence: 81%

Temporal and along-shelf distribution of the larval fish assemblage at Gran Canaria, Canary Islands

Hernández‐León

Moyano

2009

Sci. Mar.

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SUMMARY: Temporal and spatial variations of the larval fish community off the island of Gran Canaria (Canary Islands) were studied in weekly surveys from October 2005 to June 2006. A total of 156 taxa, belonging to 51 families and 15 orders, were identified. Myctophidae was by far the most abundant family (30%), followed by Sparidae (11%), Clupeidae (9%) and Gonostomatidae (7%). As expected for an oceanic island, neritic and oceanic taxa contributed in similar proportions. Leeward and windward retention areas were found for total egg and neritic larval abundance. However, seasonality showed a stronger influence on the annual larval assemblage than sampling site, as the latter was not significant on a long time scale. Results suggest that there are two seasonal larval assemblages corresponding to the two main characteristic periods of the water column in these waters: mixing (winter) and stratification (summer). In addition, a significant relationship was recorded between lunar illumination and small mesozooplankton biomass, suggesting that this relationship may be extended to certain neritic families. The most abundant neritic larvae (Sparidae) showed this lunar pattern, which partially supports a recent hypothesis about the effect of lunar illumination on larval fish survival and development in subtropical waters.Keywords: ichthyoplankton, larval assemblages, mesozooplankton, seasonal variation, lunar illumination. RESUMEN: VARIACIONES ESTACIONALES Y ESPACIALES DE LA COMUNIDAD DE LARVAS DE PECES DE GRAN CANARIA, ISLAS CANARIAS.-Se estudiaron las variaciones temporales y espaciales en la comunidad de larvas de peces de la isla de Gran Canaria (Islas Canarias) a partir de muestreos semanales desde octubre 2005 a junio 2006. Se identificaron un total de 156 taxones, pertenecientes a 51 familias y 15 órdenes. La familia Myctophidae fue la más abundante (30%), seguida por Sparidae (11%), Clupeidae (9%) y Gonostomatidae (7%). Como es de esperar en una isla oceánica, los taxones neríticos y oceánicos contribuyeron en proporciones similares. Se encontraron dos zonas de retención para huevos y larvas de especies neríticas, a sotavento y barlovento de la isla. Sin embargo, la estacionalidad mostró una mayor influencia en la estructura de la comunidad larvaria que la zona de muestreo, siendo ésta no significativa a largo plazo. Se observaron dos asociaciones estacionales de larvas correspondiendo con los dos períodos más característicos en la columna de agua: periodo de mezcla (invierno) y de estratificación (verano). Además, se encontró una relación significativa entre la iluminación lunar y la biomasa del zooplancton de pequeño tamaño, que podría ser extensible a las larvas neríticas. Las larvas neríticas más abundantes (Sparidae) mostraron una relación con el ciclo lunar, apoyando parcialmente una hipótesis reciente sobre el efecto de la iluminación lunar en la supervivencia larvaria y su desarrollo en aguas subtropicales.Palabras clave: ictioplancton, asociaciones de larvas, mesozooplancton, variaciones estacionales, ...

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Section: Introductionsupporting

confidence: 81%

Temporal and along-shelf distribution of the larval fish assemblage at Gran Canaria, Canary Islands

Hernández‐León

Moyano

2009

Sci. Mar.

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“…However, permanent adult populations have not been reported around the canary islands, although this species is common over the african shelf (gonzález-Pérez, 1995;Udekem d'acoz, 1999). Previous studies have shown that these upwelling filaments can transport neritic fish larvae from the african coast to the canary islands (rodríguez et al, 1999;rodríguez et al, 2004;Bécognée et al, 2006). in general, our results are in agreement with the findings of rodríguez et al (2001) on the spatial variability of ichthyoplankton around gran canaria during the same cruise.…”

Section: Invertebrate Larvaementioning

confidence: 98%

“…sometimes, filaments have been reported to act as a means of offshore transport of water masses from the northwest african upwelling to the vicinity of gran canaria by interacting with the eddies system (Hernández-guerra et al, 1993;Barton et al, 2000;Barton et al, 2004). these upwelling filaments were reported as mechanisms for the transport of fish larvae from africa to the canary islands responsible for reseeding the island population (rodríguez et al, 1999, 2004Bécognée et al, 2006).…”

mentioning

confidence: 99%

Horizontal distribution of invertebrate larvae around the oceanic island of Gran Canaria: the effect of mesoscale variability

Landeira

Lozano-Soldevilla

2009

Sci. Mar.

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. 3 departamento de oceanoloxía, instituto de investigaciones Marinas (csic), vigo, spain.sUMMarY: in october 1991, the horizontal distribution of invertebrate larvae was studied in the waters surrounding the island of gran canaria (canary islands). the cruise was typified by the presence of three recurrent mesoscale hydrographic structures: a cyclonic eddy southwest of the island, a warm lee region downstream of the island and the offshore boundary of an upwelling filament from the african coast reaching the southeast of the island. decapod larvae were the most abundant group. in general, a rather high spatial variability was found. the horizontal distribution of the invertebrate larvae groups showed that the highest values of abundance occurred in an elongated zone around the island oriented in the overall direction of flow, leeward and windward of the island, while the lowest values occurred off the eastern and western flanks of the islands. on the other hand, stomatopoda and Mollusca larvae showed a distribution associated with the boundary of the upwelling filament and decapod larvae of pelagic species were distributed around the eddy structure. our results suggest specific retention mechanisms for the larvae of neritic invertebrate populations that are related to the particular physical oceanography around gran canaria.Keywords: invertebrate larvae, decapod larvae, abundance, mesoscale variability, canary islands. resUMen: Distribución horizontal de las larvas de invertebrados alrededor de la isla oceánica de Gran Canaria: efecto de la variabilidad de mesoescala. -se estudió la distribución horizontal de las larvas de invertebrados alrededor de la isla de gran canaria (islas canarias) en octubre de 1991. La campaña se caracterizó por la presencia de tres fenómenos oceanográficos de mesoescala recurrentes: un remolino ciclónico al suroeste de la isla, la estela cálida a sotavento de la misma y el borde de un filamento proveniente del afloramiento africano situado al sureste de gran canaria. Las larvas de crustáceos decápodos fueron las más abundantes. en general, las larvas de los diferentes taxa estudiados mostraron una gran variabilidad en cuanto a su distribución espacial. La distribución horizontal de las larvas de los diferentes grupos de invertebrados mostró que las densidades más altas se registraban alrededor de la isla en la banda cercana y orientada hacia el suroeste, en la dirección del flujo, mientras que los valores más bajos se encontraron en el norte y en los flancos este y oeste de la isla. Por otro lado, las larvas de estomatópodos y moluscos presentaron una distribución asociada al frente del filamento, mientras que las larvas de decápodos pelágicos se distribuyeron en torno al remolino ciclónico. Los resultados obtenidos sugieren la existencia de mecanismos de retención específicos para el mantenimiento de las poblaciones insulares, relacionados con los procesos físicos de mesoescala predominantes.Palabras clave: larvas de invertebrados, larvas de decápodos, abundancia, variabilidad de me...

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“…These processes also affect food availability for paralarvae, dispersion, intensity of the retention mechanisms of larvae around the island, etc. ( Van-Heukelen, 1979;Norcross and Shaw, 1984;Boehlert et al, 1992;Villanueva, 1995;Rodríguez et al, 2001Rodríguez et al, , 2004. They are more or less relevant depending on the geographical scale and local features (Mangold, 1983;Hernández-García et al, 1998).…”

Section: Discussionmentioning

confidence: 99%

Wavelet analysis of correlation among Canary Islands octopus captures per unit effort, sea-surface temperatures and the North Atlantic Oscillation

et al. 2011

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a b s t r a c tShort-term fluctuations in the octopus catches off the Canary Islands have been attributed to changes in the sea surface temperature (SST) and the North Atlantic Oscillation (NAO) pattern. These results have been found using stationarity assumptions. However, the behavior of environmental systems is not always linear, and environmental time series do not always satisfy the statistical property of stationarity. Wavelet spectral analysis is a methodology which can deal with non-linear, non-stationary and noisy time series. Cross wavelet analysis (wavelet coherence) is applied to investigate the environmental effects (SST, NAO) on octopus abundance fluctuations measured as capture per unit of effort (CPUE) from 1989 to 2007 in the waters of the Canary Islands. A slightly positive correlation exists between NAO and CPUE at lags and leads of a few months. Additionally, a good relationship between SST and CPUE exists on the same seasonal scale, but there is a relatively weak relationship between SST anomalies and the NAO. When the analysis is extended to the interannual scale, the wavelet coherence identifies a statistically significant relationship between CPUE and NAO, but this does not happen when the wavelet coherence between CPUE and SST is computed. These results suggest that fluctuations in octopus catches could be the result of SST fluctuations but in synergy with other unknown environmental variables which are also affected by the NAO pattern.

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Mesozooplankton and ichthyoplankton distribution around Gran Canaria, an oceanic island in the NE Atlantic

Cited by 46 publications

References 37 publications

Temporal and along-shelf distribution of the larval fish assemblage at Gran Canaria, Canary Islands

Temporal and along-shelf distribution of the larval fish assemblage at Gran Canaria, Canary Islands

Horizontal distribution of invertebrate larvae around the oceanic island of Gran Canaria: the effect of mesoscale variability

Wavelet analysis of correlation among Canary Islands octopus captures per unit effort, sea-surface temperatures and the North Atlantic Oscillation

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