Feeding ecology and growth of age 0 year<i>Platichthys flesus</i>(L.) in a vegetated and a bare sand habitat in a nutrient rich fjord

Andersen, Bjørn; Carl, Jesper; Grønkjær, Peter; Støttrup, Josianne

doi:10.1111/j.0022-1112.2005.00620.x

Cited by 41 publications

(31 citation statements)

References 56 publications

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“…Redon et al, 1994;Andersen et al, 2005;Vassilopoulou, 2006). These variations could be related to changes in space and time of benthic prey (e.g.…”

Section: Dietmentioning

confidence: 99%

“…Several authors have studied the diet, age and growth and reproduction of Platichthys flesus in northwestern Europe and in the Black Sea (e.g. Summers, 1979;Beaumont and Mann, 1984;Andersen et al, 2005;Çiloğlu, 2005). Age and growth and reproduction of Microchirus azevia have been studied on the south coast of Portugal, in the Mediterranean and in southern Morocco (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Diet, growth and reproduction of four flatfishes on the Portuguese coast

Teixeira¹,

Batista²,

Cabral³

2010

Sci. Mar.

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from commercial fishing vessels operating with gill nets and bottom trawls along the Portuguese coast in order to examine feeding habits, age and growth and reproduction. Citharus linguatula (Linnaeus, 1758), Lepidorhombus boscii (Risso, 1810) and Microchirus azevia (de Brito Capello, 1867) fed mainly on crustaceans, whereas Platichthys flesus (Linnaeus, 1758) fed mainly on echinoderms and crustaceans. Feeding activity was highest in spring and summer; females and small individuals showed the lowest vacuity index values. For all the species, significant differences were found in the proportion of prey items according to season, sex and size class. M. azevia had the largest diet spectrum. Ages were determined from sagittal otoliths. The von Bertalanffy growth equation coefficients differed between sexes. The asymptotic length L ∞ of females was higher than that of males, except in C. linguatula. The lowest growth coefficient was obtained for P. flesus (k=0.11 for males and k=0.10 for females) and M. azevia showed the highest growth coefficient estimates (k=0.40 for females and k=0.30 for males). The highest proportion of individuals at spawning stage was recorded in winter for L. boscii, P. flesus and M. azevia, and in autumn for C. linguatula.Keywords: flatfish, diet, growth, otoliths, reproduction, Portuguese coast. RESUMEN: Dieta, crecimiento y reproducción de cuatro especies de peces planos en la costa portuguesa. -Cuatro especies de peces planos fueron capturadas desde enero de 2003 hasta junio de 2005 por embarcaciones comerciales operando con redes de enmalle y arrastre de fondo, a lo largo de la costa portuguesa, con objeto de examinar los hábitos alimenticios, la edad, el crecimiento y el ciclo sexual. Citharus linguatula (Linnaeus, 1758), Lepidorhombus boscii (Risso, 1810) y Microchirus azevia (de Brito Capello, 1867), se alimentaron sobre todo de crustáceos. La dieta de Platichthys flesus (Linnaeus, 1758) estuvo compuesta principalmente por equinodermos y crustáceos. La mayor actividad alimenticia se observó en la primavera y el verano. Las hembras y los individuos más pequeños presentaron valores de índices de vacuidad más bajos. Para todas las especies se encontraron diferencias significativas en la proporción de ítems alimenticios según la estación, el sexo y la talla. M. azevia presentó el espectro más amplio de dieta. Las edades fueron determinadas a partir de los otolitos sagittae. Los coeficientes de la ecuación de crecimiento de von Bertalanffy fueron diferentes para los dos sexos. La talla asintótica L ∞ de las hembras fue mayor que la de los machos, excepto para C. linguatula. El coeficiente de crecimiento más bajo se observó para P. flesus (k=0.11 para los machos y k=0.10 para las hembras), M. azevia presentó el mayor coeficiente de crecimiento (k=0.40 para hembras y k=0.30 para machos). La mayor proporción de individuos maduros en L. boscii, P. flesus y M. azevia se observó en invierno y en C. linguatula en otoño.

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“…Redon et al, 1994;Andersen et al, 2005;Vassilopoulou, 2006). These variations could be related to changes in space and time of benthic prey (e.g.…”

Section: Dietmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diet, growth and reproduction of four flatfishes on the Portuguese coast

Teixeira¹,

Batista²,

Cabral³

2010

Sci. Mar.

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“…The present study did not allow the assessment of the real contribution of the lima estuary to the adult stocks of S. pilchardus. although several authors defend the criteria of Beck et al (2001) as fundamental for proving the nursery role of an habitat (Cattrijsse and Hampel, 2006), recruitment success depends not only on the survival and growth of juveniles spent in the nursery grounds, but also on the highly variable larval phase ( Van der Veer, 1986;Beverton, 1995;andersen et al, 2005). Thus, the unusual high abundance of sardine larvae within the lima estuary is a crucial finding for the recruitment assess of S. pilchardus in the northern iberian atlantic.…”

Section: Responses To Environmental Forcingmentioning

confidence: 99%

New insights into the early life ecology of <em>Sardina pilchardus</em> (Walbaum, 1792) in the northern Iberian Atlantic

Ramos¹,

Ré²,

Bordalo³

2009

Sci. Mar.

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SUmmarY: in the atlantic iberian estuaries, sardines tend to be a minor component of the ichthyoplankton assemblages, with rare occurrence largely restricted to estuarine mouths. However, this was not the case of the lima estuary (nW Portugal), where sardines were the most abundant and frequently occurring marine taxon of the larval fish assemblages. abundance of sardines collected during a two-year survey (2002)(2003)(2004) ranged from 0.5 to 60.8 larvae/100 m 3 , with the majority still showing yolk and unpigmented eyes. moreover, 80% of sardines were 8 days old or less and the total length ranged from 2 to 16 mm. Seasonal variations of sardine occurrence in the lima estuary correlated with temporal variations of salinity and temperature in the water column. The unusually high river-flow observed during the winter of [2002][2003], which preceded the spring-summer abundance peak, seemed to act as a signal for the estuarine recruitment that was encountered. in addition, the estuarine occurrence of sardine larvae was also correlated with the intensity of summer upwelling, which was responsible for coastal depletion of sardine larvae resulting in estuarine low catches during the summer of 2002. The lima estuary also revealed another peculiarity related to the lack of temporal synchrony between coastal spawning activity and occurrence of larvae within the estuary. The abundance peaks of newly-hatched larvae (autumn 2002 and spring-summer 2003) did not coincide with the winter-spring spawning pattern described earlier for the northern iberian coast. modifications of the spawning strategy of the northern iberian sardine stock are discussed based on these new insights into the early life of S. pilchardus.Keywords: Sardina pilchardus, larval stages, spawning strategy, environmental forcing, upwelling, lima river estuary.reSUmen: Nuevos aspectos sobre la ecología de los estados iniciales de desarrollo de Sardina pilcharduS (Walbaum, 1792) en el norte del Atlántico ibérico. -las sardinas tienden a ser un componente menor del ictioplancton de los estuarios atlánticos ibéricos. Su aparición es rara y restringida, en gran parte, a las desembocaduras de los ríos. Sin embargo, éste no fue el caso del estuario del río lima (nW Portugal), donde las sardinas fueron la especie marina más abundante del ictioplanton estuarino. las sardinas fueron recolectadas durante un período de dos años (2002)(2003)(2004), y su abundancia varió entre 0.5-60.8 larvas/100 m 3 . la mayoría de dichas larvas todavía presentaban saco vitelino y ojos no pigmentados. Por otra parte, el 80% de las sardinas tenían 1 semana o menos de vida y su longitud total varió entre 2 y 16 mm. las variaciones estacionales en la aparición de larvas de sardina en el estuario del río lima se correlacionaron con fluctuaciones temporales de salinidad y de temperatura de la columna de agua. los elevados caudales del río observados durante el invierno 2002-2003, que precedieron el pico de abundancia del primavera-verano, parecieron actuar como señal para el reclutamiento al...

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“…Even the small larvae of the endemic silverside Poblana alchichica could be feeding on Cletocamptus gomezi; harpacticoids copepods are known to be the primary food source for bottom or phytal feeding juvenile and small fish (Wyckmans et al, 2007). They represent an important link between microalgal primary production and higher trophic levels (Andersen et al, 2005).…”

Section: Discussionmentioning

confidence: 99%