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Hábitos alimentarios del besugo Epigonus crassicaudus combinando contenido estomacal e isótopos estables

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TLDR
In this paper, a trabajo estudio of the habitos alimentarios combinando analisis estomacales and estabilidad isotopica was conducted.
Abstract
El besugo, Epigonus crassicaudus, es una especie de importancia economica para la actividad pesquera que opera en el centro-sur de Chile. A pesar de ello, poco es lo que se conoce respecto a su biologia. En este sentido, este trabajo estudio los habitos alimentarios combinando analisis estomacales y de estabilidad isotopica. Los resultados del analisis dan cuenta de la importancia de los peces mesopelagicos (Myctophidae, Stomiidae) en la dieta con un aporte del 80%, seguido por crustaceos ( Sergestes arcticus ) alcanzando un 10%. No se detectaron diferencias en la dieta en peces con distinto grado de madurez sexual. En tanto, los valores de los isotopos de nitrogeno y carbono mostraron valores de promedio de 17,12 ± 1,1 δ 15N y de -17,51 ± 0,7 δ 13C, respectivamente. La constitucion de valores de δ 13C fue proporcional al tamano corporal de los besugos: individuos de mayor tamano habitan en ambientes mas demersales que ejemplares de menor tamano. De acuerdo a estos resultados, el besugo  se situa como consumidor secundario.

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Citations
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Reproductive traits and natural mortality of the cardinalfish Epigonus crassicaudus: crucial information for stock assessment and sustainable management measures

TL;DR: The life history parameters estimated in the present study can be used to evaluate possible time variability in maturity and M rates and could be used in stock assessment analysis and to apply effective management measures in the fishery.
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Local and global environmental drivers of growth chronologies in a demersal fish in the south-eastern Pacific Ocean

TL;DR: In this paper, an extensive growth chronology was reconstructed from the annual growth of sagittal otoliths as a proxy for somatic growth for the cardinalfish (Epigonus crassicaudus).
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Fishing opportunities for the deepwater cardinalfish ( Epigonus crassicaudus ) in the continental shelf break along central Chile

TL;DR: In this article , the authors analyzed records of fishing logs covering the period 1999-2007 and compared the position of individual fishing hauls (Euclidean distance) applying a hierarchical agglomerative clustering technique.
References
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Journal ArticleDOI

Source partitioning using stable isotopes: coping with too much variation.

TL;DR: This work outlines a framework that builds on recently published Bayesian isotopic mixing models and presents a new open source R package, SIAR, to allow for continued and rapid development of this core model into an all-encompassing single analysis suite for stable isotope research.
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A niche for isotopic ecology

TL;DR: To make isotopic measurements comparable to other niche formulations, this work proposes transforming δ-space to p-space, where axes represent relative proportions of isotopically distinct resources incorporated into an animal's tissues.
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Body size in ecological networks

TL;DR: In this paper, the authors propose a new framework to describe the structure and functioning of ecological networks and to assess the probable consequences of biodiversity change, by incorporating body size into theoretical models that explore food web stability and the patterning of energy fluxes.
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Comparison of aquatic food chains using nitrogen isotopes

TL;DR: The results suggest that the delta(15)N signatures of nitrogen at the base of the food chain will provide a useful tool in the assessment of anthropogenic nutrient inputs.
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Feeding habits and trophic levels of Mediterranean fish

TL;DR: Acrossspecies, TROPH values increased asymptotically with maximum reported body length and the within- andamong-species asymPTotic relationships betweenTROPH and body length are discussed within the framework of foraging behavior and preyselection theory.