Optimal prey size for early turbot larvae (Scophthalmus maximus L.) based on mouth and ingested prey size

Cunha, Isabel; Planas, Miquel

doi:10.1016/s0044-8486(99)00040-x

Cited by 93 publications

(76 citation statements)

References 12 publications

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“…These changes along with an increase in enzymatic activity (Alvarez-González, 2003;Peña et al, 2009) enhance the digestive capability. Likewise, the tail segment showed negative allometric growth; however, the positive allometry of the TD and MH contribute to increasing the swimming capabilities, and together with the development of the ML allow the ingestion of bigger prey (Cunha and Planas, 1999). …”

Section: Discussionmentioning

confidence: 99%

Development and allometric growth patterns during early larval stages of the spotted sand bass Paralabrax maculatofasciatus (Percoidei: Serranidae)

Peña¹,

Dumas²

2009

Sci. Mar.

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SUMMARY: We describe the allometric growth patterns of Paralabrax maculatofasciatus larvae raised under culture conditions. From hatching to day 30, ten to fifteen larvae were sampled each day and measured using digital photograph software. Morphometric measurements included total length, head length, body length, tail (post anal) length, head depth, body depth, muscle height, tail depth, mouth length and eye diameter. Allometric growth was modeled by a power function and patterns in allometry were described by the growth coefficient (power function exponent). Based on the changes in the growth coefficients we can infer changes in ontogenetic priorities related to developmental stages of the spotted sand bass. During the yolk sac and preflexion stages (TL interval = 1.57 to 4.38 mm) there is an evident priority to enhancing the feeding and swimming capabilities by promoting accelerated growth in the head and tail length. During the flexion stage (TL interval = 4.89 to 7.54 mm), there is a major decrease in the growth coefficients, indicating a change in growth priorities. At the end of the postflexion stage there is an evident tendency to isometry for all the growth coefficients. The present results support the hypothesis of differential growth patterns for primary functions during early ontogeny.Keywords: allometric growth, larval development, spotted sand bass, Paralabrax maculatofasciatus. RESUMEN: DESARROLLO Y PAUTAS DE CRECIMIENTO ALOMÉTRICO DURANTE LOS PRIMEROS ESTADIOS LARVARIOS DE LA CABRILLA ARE-NERA PARALABRAX MACULATOFASCIATUS (PERCOIDEI: SERRANIDAE). -Este estudio describe los patrones de crecimiento alométrico de Paralabrax maculatofasciatus en cultivo. Desde la eclosión hasta los 30 días, de diez a quince larvas fueron recolectadas y medidas utilizando un software de fotografía digital. Las mediciones incluyeron longitud total, longitud de la cabeza, longitud del cuerpo, longitud de la cola (post anal), altura de la cabeza, del cuerpo, muscular, y de la cola, longitud de la boca y diámetro del ojo. Los patrones de crecimiento alométrico fueron calculados como una función potencial. Sobre la base de los cambios en los coeficientes de crecimiento se infieren cambios en las prioridades ontogenéticas relacionadas con los estadios de desarrollo. Durante los estadios de larva vitelina y preflexión (TL intervalo = 1.57 -4.38 mm) existe una evidente prioridad para incrementar las capacidades alimenticias y natatorias. Durante la etapa de flexión (TL intervalo = 4.89 -7.54 mm) se observa un cambio en las prioridades de crecimiento. Al final de la etapa de postflexión existe una evidente tendencia a la isometría en todos los coeficientes de crecimiento. Estos resultados apoyan la hipótesis de patrones diferenciales de crecimiento para funciones primordiales durante la ontogenia inicial.Palabras clave: crecimiento alométrico, desarrollo larvario, cabrilla arenera, Paralabrax maculatofasciatus.

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Section: Discussionmentioning

confidence: 99%

Development and allometric growth patterns during early larval stages of the spotted sand bass Paralabrax maculatofasciatus (Percoidei: Serranidae)

Peña¹,

Dumas²

2009

Sci. Mar.

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“…On the other hand, according to several authors prey size and other factors related to fish size including, for example, handling ability of fishes are important variables that determine food selection (Cunha and Planas 1999, de Crespin de Billy et al 2002, Sánchez-Hernández et al 2011a). This study shows that the size-frequency distribution of gastrointestinal tracts was not identical to that in the benthos and drift samples.…”

Section: Discussionmentioning

confidence: 99%

Ontogenetic Dietary Shifts and Food Selection of Endemic Squalius Carolitertii (Actinopterygii: Cypriniformes: Cyprinidae) in River Tormes, Central Spain, in Summer

Sánchez‐Hernández¹,

Cobo²

2012

Acta Icth et Piscat

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“…(1) In general, fishes select preferentially -or are more efficient at capturing -prey that represent a certain proportion of their gape, mouth width or section (Shirota 1970;Cunha and Planas 1999). In H. longifilis, there is a slightly negative allometric growth of mouth dimensions and a positive allometric growth of body depth (Baras 1999).…”

Section: Size-dependent Variations Of Optimal Prey Size (Dm Topt )mentioning

confidence: 99%

Do cannibalistic fish forage optimally? An experimental study of prey size preference, bioenergetics of cannibalism and their ontogenetic variations in the African catfishHeterobranchus longifilis

Baras¹,

Dugué²,

Legendre³

2014

Aquat. Living Resour.

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-This study relied on the day-by-day analysis of bioenergetics and prey size preference in isolated cannibals of the African catfish Heterobranchus longifilis (13-57 mm standard length, 3-500 mg dry body mass, n = 153) that were offered ad libitum conspecific prey of adequate sizes in small-sized (2-L) environments under controlled conditions (12L:12D, 30• C). In these conditions, cannibals of increasing body size selected preferentially prey of decreasing size relative to their own, and increasingly closer to the optimal prey size (producing the highest gross conversion efficiency). The role of experience in cannibalism was found of secondary importance relative to body size, both as regards food intake and prey size selectivity. These results indicate that in environments that minimize the escape capacities of their potential victims, as applies to most aquacultural contexts, fish exercising cannibalism tend to forage optimally, which has rarely been evidenced for piscivorous behaviour. The present study further highlights that H. longifilis possesses a very high capacity for growth, which originates from the combination of high food intake and very high conversion efficiency, and makes this species of utmost interest for aquaculturists wherever fast growth is desirable, but also extremely prone to cannibalism wherever feeding schedules are inadequate.

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Optimal prey size for early turbot larvae (Scophthalmus maximus L.) based on mouth and ingested prey size

Cited by 93 publications

References 12 publications

Development and allometric growth patterns during early larval stages of the spotted sand bass <i>Paralabrax maculatofasciatus</i> (Percoidei: Serranidae)

Development and allometric growth patterns during early larval stages of the spotted sand bass <i>Paralabrax maculatofasciatus</i> (Percoidei: Serranidae)

Ontogenetic Dietary Shifts and Food Selection of Endemic <I>Squalius Carolitertii</I> (Actinopterygii: Cypriniformes: Cyprinidae) in River Tormes, Central Spain, in Summer

Do cannibalistic fish forage optimally? An experimental study of prey size preference, bioenergetics of cannibalism and their ontogenetic variations in the African catfishHeterobranchus longifilis

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