Changes in fatty acid composition and stable isotope signature of Atlantic cod (Gadus morhua) in response to laboratory dietary shifts

Olsen, Siri Aaserud; Hansen, Pia Kupka; Givskud, Henriette; Ervik, Arne; Samuelsen, Ole Bent

doi:10.1016/j.aquaculture.2014.09.039

Cited by 10 publications

(4 citation statements)

References 37 publications

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“…Previous studies have used FAs as biomarkers for trophic level indication in marine mammals (Guerrero et al, 2016;Budge et al, 2008), shark (Pethybridge, Daley and Nichols, 2011), fish (Würzberg et al, 2011;Olsen et al, 2015), invertebrates (Allan et al, 2010;Rabei et al, 2018;Soler-Membrives, Rossi and Munilla, 2011) and zooplankton (Deschutter et al, 2019;Gonçalves et al, 2012). However, these biomarkers can be affected by an organism's ability to metabolise and transform FAs which may vary within and between species at the same or similar trophic levels.…”

Section: Introductionmentioning

confidence: 99%

Understanding marine food web dynamics using fatty acid signatures and stable isotope ratios: Improving contaminant impacts assessments across trophic levels

Madgett

Yates

Webster

et al. 2019

Estuarine, Coastal and Shelf Science

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Section: Introductionmentioning

confidence: 99%

Understanding marine food web dynamics using fatty acid signatures and stable isotope ratios: Improving contaminant impacts assessments across trophic levels

Madgett

Yates

Webster

et al. 2019

Estuarine, Coastal and Shelf Science

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“…[88][89][90][91][92][93] Wild fish consuming spillover feed from fish farms are shifting their diet from a natural diet containing marine highly polyunsaturated omega-3 fatty acids to a diet with terrestrial omega-6 fatty acids. 44,94 Fatty acid changes have been noted in several species such as saithe, 44,95 horse mackerel (Trachurus mediterraneus), 96 bogue (Boops boops), 97 mugilid (Liza aurata) and sparid (Oblada melanura) 98 as well as in cod. 44,58 Meier et al 58 showed that for wild cod eating salmon pellets the terrestrial FAs (18:1n-9, 18:2n-6 and 18:3n-3) contributed more than 50% of the total FAs in the liver compared to wild cod eating marine prey where these levels were below 20%.…”

Section: Risk Source 3: Altered Fatty Acid Composition From Plant Feedmentioning

confidence: 99%

“…Wild fish consuming spillover feed from fish farms are shifting their diet from a natural diet containing marine highly polyunsaturated omega‐3 fatty acids to a diet with terrestrial omega‐6 fatty acids 44,94 . Fatty acid changes have been noted in several species such as saithe, 44,95 horse mackerel ( Trachurus mediterraneus ), 96 bogue ( Boops boops ), 97 mugilid ( Liza aurata ) and sparid ( Oblada melanura ) 98 as well as in cod 44,58 …”

Section: In‐depth Characterization Of Risk Sourcesmentioning

confidence: 99%

Ecological interactions between farmed Atlantic salmon and wild Atlantic cod populations in Norway: A review of risk sources and knowledge gaps

Bøhn,

Strøm,

Sanchez‐Jerez

et al. 2024

Reviews in Aquaculture

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Aquaculture provides an important and expanding source of protein rich and healthy food to the world. However, to minimize environmental harm from aquaculture, interactions with wild fish communities need to be thoroughly assessed. Here, we characterize the existing knowledge pertaining to such interactions, exemplified with Atlantic salmon (Salmo salar) farming in open net pens along the Norwegian coast and potential consequences for wild Atlantic cod (Gadus morhua) populations. Importantly, the wild cod fishery also provides a protein rich, high quality food source with high economic value. We identify seven risk sources that may affect behaviour, physiology, and survival in wild cod. Of particular importance is the large amount of waste feed that causes wild fish to aggregate around farms, thereby altering a multitude of ecological interactions including predation and disease transmission. Moreover, altered food quality in pellets may alter physiological processes and cause mortality to vulnerable life‐stages in wild cod. More research is needed on mechanisms and thresholds for harm. As the most important cod fisheries are found in northern Norway, where climate change also is rapid, we expect stronger and potentially more harmful interactions between fish farming and wild cod fisheries as aquaculture continues to expand. We hope that our analysis will inspire further research, on farmed salmon and wild cod interactions, but also on aquaculture and wild fish interactions in general. Such research is fundamental for the development of management systems that can reduce the impact of aquaculture on fisheries and the environment.

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“…Various studies have compared the rates of isotopic turnover between different types of tissues in fishes. For example, Olsen et al (2015) found that the isotopic turnovers in plasma, muscle and heart reached a steady state faster than in the liver of the Atlantic cod Gadus morhua. The turnover of isotopes may also vary greatly among fish species.…”

Section: Introductionmentioning

confidence: 99%

Comparison of isotopic turnover dynamics in two different muscles of a coral reef fish during the settlement phase

Gajdzik¹,

Lepoint²,

Lecchini³

et al. 2015

Sci. Mar.

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Summary:The temporal variation in carbon and nitrogen isotopic compositions (noted as δ 13 C and δ 15 N) was investigated in the convict surgeonfish (Acanthurus triostegus) at Moorea (French Polynesia). Over a period of 24 days, juveniles were reared in aquaria and subjected to two different feeding treatments: granules or algae. The dynamics of δ 13 C and δ 15 N in two muscles (the adductor mandibulae complex and the epaxial musculature) having different functions were compared. At the end of experiments, a steady-state isotopic system in each muscle tissue was not reached. Especially for the algal treatment, we found different patterns of variation in isotopic compositions over time between the two muscles. The turnovers of δ 13 C showed opposite trends for each muscle but differences are mitigated by starvation and by the metamorphosis. Our study highlighted that the metabolism of coral reef fish may be subjected to catabolism or anabolism of non-protein precursors at settlement, inducing variation in isotopic compositions that are not linked to diet change.Keywords: Acanthuridae; stable isotopes; development; ontogeny; metamorphosis; starvation; surgeonfish.Comparación de la dinámica de variación isotópica en dos músculos de un pez de arrecife de coral durante la fase de asentamiento Resumen: La variación temporal en la composiciones isotópicas del carbono y nitrógeno (δ 13 C y δ 15 N) fue investigada en el pez cirujano Acanthurus triostegus en Moorea (Polinesia Francesa). Durante un período de 24 días, peces juveniles se mantuvieron en acuarios y se sometieron a dos tratamientos de alimentación: gránulos o algas. Se compararon las dinámicas de cambio δ 13 C y δ 15 N en dos músculos con diferentes funciones (complejo aductor mandibular y musculatura epiaxial). Al final de los experimentos, no se alcanzó un sistema isotópico de estado estacionario en ningún tejido. Especialmente para el tratamiento de algas, encontramos distintos patrones de variación en composiciones isotópicas en el tiempo entre los dos músculos. Las variaciones en δ 13 C mostraron tendencias opuestas para cada músculo, pero las diferencias fueron mitigadas por la inanición y la metamorfosis. Nuestro estudio destaca que el metabolismo de los peces de arrecife puede ser sometido a catabolismo o anabolismo por los precursores no proteicos durante el asentamiento, induciendo variación en las composiciones isotópicas que no están vinculados al cambio de dieta.Palabras clave: Acanthuridae; isótopos estables; desarrollo; ontogenia; metamorfosis; inanición; surgeonfish.

show abstract

Changes in fatty acid composition and stable isotope signature of Atlantic cod (Gadus morhua) in response to laboratory dietary shifts

Cited by 10 publications

References 37 publications

Understanding marine food web dynamics using fatty acid signatures and stable isotope ratios: Improving contaminant impacts assessments across trophic levels

Understanding marine food web dynamics using fatty acid signatures and stable isotope ratios: Improving contaminant impacts assessments across trophic levels

Ecological interactions between farmed Atlantic salmon and wild Atlantic cod populations in Norway: A review of risk sources and knowledge gaps

Comparison of isotopic turnover dynamics in two different muscles of a coral reef fish during the settlement phase

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