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Descripción de una nueva metodología para estudios de alimentación de larvas de peces marinos

Authors: Cunha, Isabel; Planas, Miguel;

Descripción de una nueva metodología para estudios de alimentación de larvas de peces marinos

Abstract

[ES] Este trabajo describe una técnica para la tinción de presas vivas y el análisis de contenidos digestivos en larvas de peces. Las presas usadas fueron: rotíferos (Brachionus plicatilis O.F. Müller) y metanauplius de Artemia. El método de tinción consistió en un corto periodo de alimentación con tinta china. La coloración de las presas fue rápida, permaneciendo estable durante 3 horas en agua de mar limpia. La presencia de tinta en el agua o dentro de las presas no fue perjudicial ni afectó a la alimentación de las larvas de rodaballo (Scophthalmus maximus L.). También se puso a punto un tratamiento químico de las larvas para facilitar la observación del contenido digestivo. El método incluye fijación, eliminación de grasa y maceración de las larvas, que una vez tratadas quedan transparentes y listas para su análisis. Este puede realizarse en larvas enteras o en tubos digestivos diseccionados, dependiendo del tamaño de aquellas, que pueden montarse en portaobjetos en grupos de 20, permitiendo una observación rápida del contenido digestivo. Este tratamiento no afectó a la estabilidad de la tinta dentro de las presas ingeridas. Esta técnica es una herramienta útil y simple en estudios de alimentación (ingestión, evacuación, selección de presas) en larvas de peces

[EN] A technique was developed for prey labelling and gut content analysis in fish larvae. The prey used were rotifers (Brachionus plicatilis O.F. Müller) and Artemia metanauplii. The labelling method consisted on a short feeding period on drawing ink. The coloration of the prey was rapid and remained stable for 3 hours when transferred into clear water. The presence of ink in the water or within the prey was neither detrimental nor effected the feeding performance of turbot (Scophtalmus maximus L.) larvae. Furthermore, a chemical treatmet was applied to the larvae to facilitate the observation of gut contents. The method involved fixation, defatening and maceration of the larvae which got transparent and ready for gut content analysis. Whole larvae or dissected guts, depending on the larval size, can be mounted in groups up to 20 on microscope slides and the gut contents rapidly analysed. This treatment did not effect to the stability of the ink within the ingested prey. The technique has been proved to be a usefull and simple tool in the study of feeding, such as ingestion, evacuation rates or prey selection by fish larvae

6 pages, 2 figures, 1 table.-- Actas del V Congreso Nacional de Acuicultura, Sant Carles de la Ràpita, 10-13 Mayo 1995

Comisión Interministerial de Ciencia y Tecnología, proyecto AGF 185/92

No

Keywords

Contenidos digestivos, Marcaje, Larvas de peces, Gut content, Feeding, Alimentación, Rotífero, Fish larvae, Presas vivas, Live prey, Experimentación, Labelling, Rotifer, Artemia, Experimentation

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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