Determination of food sources of marine invertebrates from a subtidal sand community using analyses of fatty acids and stable isotopes

Kharlamenko, Vladimir I.; Kiyashko, S. I.; Rodkina, S. A.; Imbs, Andrey B.

doi:10.1134/s106307400802003x

Cited by 50 publications

(29 citation statements)

References 38 publications

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“…Le Loc'h et al (2008) found similar results in 80-130 m of water. Nadon and Himmelman (2006) and Kharlamenko et al (2008) addressed this issue specifically and found d 13 C enrichment in benthic consumers in the absence of highd 13 C food sources like MPB and macroalgae. Therefore, to adjust our mixing-model estimates for any potential natural enrichment, we estimated the MPB dietary contribution of SS macroinfauna using a conservative mixing model that used off-shoal consumers as a baseline (0% MPB contribution).…”

Section: Discussionmentioning

confidence: 99%

Spatial variation in basal resources supporting benthic food webs revealed for the inner continental shelf

Grippo

Fleeger

Dubois

et al. 2011

Limnology & Oceanography

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We used stable isotopes to examine the relative importance of phytodetritus and microphytobenthos (MPB) in supporting benthic food webs on the Louisiana continental shelf. Primary producers and macroinfauna were collected from Ship Shoal (SS), a submerged, sandy, barrier island where sediment-associated algae are primarily MPB and from silty, off-shoal areas where sediment-associated algae are primarily phytodetritus or a mixture of the two resources. Macroinfauna, as individual taxa and trophic guilds, were significantly more enriched in 13 C on SS indicating greater dependence on MPB, which is enriched in 13 C compared to phytoplankton. Using d 13 C in a two-source mixing model, the estimated MPB dietary contribution for SS macroinfauna averaged across trophic guilds, ranged from 53.4% to 83.0%, depending on the mixing-model end-members used, and 5 of 14 taxa had lower 95% confidence intervals (CI) . 20%, indicating that MPB was a primary resource for most SS macroinfauna. Off-shoal, the dietary contribution of MPB ranged from14.5% to 47.7% and most taxa had a lower CI near 0%. Settled phytoplankton are the primary microalgal food source in muddy sediments, but the importance of MPB increases in more sandy sediments where MPB are the predominant microalgal resource. Sandy shoals play a unique food-web role in deltaic shelf systems and support benthic food webs on the continental shelf.

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Section: Discussionmentioning

confidence: 99%

Spatial variation in basal resources supporting benthic food webs revealed for the inner continental shelf

Grippo

Fleeger

Dubois

et al. 2011

Limnology & Oceanography

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“…Thus, the carbon isotopic composition of a consumer and its prey items are related in a predictable pat-tern (Tieszen et al 1983, Peterson & Fry 1987, McCutchan et al 2003. Carbon stable isotope, which typically discriminates with the delta value (δ) of 1 ‰ for each trophic level (Peterson & Fry 1987), is often used to quantify food assimilation, providing the technical measure for analyzing consumers long-term food utilization (Peterson et al 1985, Kurata et al 2001, Yokoyama et al 2005, Gao et al 2006, Kharlamenko et al 2008. These studies and their conclusions are based on the assumption that tissues of consumers are in isotopic equilibrium with their diet (Post 2002, Gao et al 2006.…”

Section: Introductionmentioning

confidence: 99%

Estimates of carbon turnover rates in the sea cucumber Apostichopus japonicus (Selenka) using stable isotope analysis: the role of metabolism and growth

Sun¹,

Gao²,

Dong³

et al. 2012

Mar. Ecol. Prog. Ser.

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Stable isotope analysis is increasingly being used to determine the trophic relationships of aquatic ecosystems. Most ecological and biological conclusions from isotope analysis are based on the assumption that the tissues of the respective consumers are in equilibrium with the potential food sources. Such an assumption, however, is not always validated in individual field studies. Hence, knowledge of the stable isotope turnover rates for the experimental organisms is fundamental for interpreting isotopic data. In this study, the carbon isotopic turnover rates for body walls and intestines of sea cucumbers Apostichopus japonicus (Selenka) of different sizes were investigated. The carbon isotopic turnover rate for the intestine was found to be faster than that for the body wall. The carbon stable isotope turnover rate decreased with an increase in body size, owing to the decrease in the metabolic activities of the larger individuals. Metabolism, rather than growth, was the principal driver of carbon stable isotope turnover, contributing 80 to 90% of the turnover for the intestine and 60 to 75% for the body wall. Analysis of the relationship between carbon replacement and the metabolism of sea cucumbers showed that the half-lives of carbon isotope replacement for both intestine and body wall were significantly related to physiological activities in terms of the oxygen consumption rates and food ingestion rates of the sea cucumbers. Our findings suggested that differences in turnover rates between various species and tissues should be considered when using stable isotopes in ecological studies. It is proposed that further development of isotope mixing models is needed and that these models should integrate isotope turnover for specific species or tissues. KEY WORDS: Sea cucumber · Apostichopus japonicus (Selenka) · Carbon turnover · Stable isotope · Metabolism Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 457: [101][102][103][104][105][106][107][108][109][110][111][112] 2012 tern (Tieszen et al. 1983, Peterson & Fry 1987, McCutchan et al. 2003. Carbon stable isotope, which typically discriminates with the delta value (δ) of 1 ‰ for each trophic level (Peterson & Fry 1987), is often used to quantify food assimilation, providing the technical measure for analyzing consumers long-term food utilization (Peterson et al. 1985, Kurata et al. 2001, Yokoyama et al. 2005, Gao et al. 2006, Kharlamenko et al. 2008. These studies and their conclusions are based on the assumption that tissues of consumers are in isotopic equilibrium with their diet (Post 2002, Gao et al. 2006. However, this may not necessarily be true, since the carbon isotopic ratios of the food items absorbed by the consumer are always dynamic. This is due to the different mechanisms of carbon fixation between primary producers, the seasonality of food availability and the movement or migration of predators, as well as the difference in the physiological characteristics of various species . When t...

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“…Nonetheless, a univariate technique may initially be used in order to detect which individual FAs may act as 'key FAs' to discriminate between different fish and to avoid 'noise FAs' that do not aid in discrimination. Moreover, FA signature analysis can be combined with other techniques, such as stable isotope analysis, in order to improve the capacity for detecting fish farm influence and differentiating between fish origins, as has already been applied in other fields (Cook et al 2004, Kharlamenko et al 2008. However, despite clear field results in the FA profiles of wild fish previously consuming food pellets, several doubts need to be resolved before specific guidelines can be given for using FAs as trophic markers in fish.…”

Section: Fatty Acids As Trophic Markers Of Aquaculture Influence On Wmentioning

confidence: 99%

“…The FA composition of individuals captured by artisanal fishing gears were always more similar to farm-aggregated than to control samples. To improve the capacity for differentiating fish origin, FA profiles can be used along with other techniques, like body morphology (Fleming et al 1994, Grigorakis et al 2002, condition indexes (Fernandez-Jover et al 2007), trace elements (Yildiz 2008, Adey et al 2009, Percin et al 2011, stable isotopes (Serrano et al 2007, Kharlamenko et al 2008, or genetic methods (Danielsdottir et al 1997). Fatty acid signature, however, presents advantages with respect to other techniques, since it can give a picture of the impact of farming on the environment as well as nutritional information (such as fat content or the n-3/n-6 ratio) that can aid in the correct labelling of fish products (Standal et al 2007, Jacquet et al 2010.…”

Section: Fatty Acids As Trophic Markers Of Aquaculture Influence On Wmentioning

confidence: 99%

Monitoring the influence of marine aquaculture on wild fish communities: benefits and limitations of fatty acid profiles

Fernandez‐Jover¹,

Arechavala-López²,

Martínez-Rubio³

et al. 2011

Aquacult. Environ. Interact.

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Fatty acids (FA) have been applied as indicators of the influence of coastal sea-cage fish farming on wild fish communities in several recent scientific publications. Due to the relatively high conservation of FA composition throughout the food web, they are useful for characterizing trophic relationships. The increasing utilization of vegetable or alternative animal oils in the production of aquafeeds results in cultivated fish exhibiting higher levels of terrestrial FAs in their tissues. As previously reported, wild fish ubiquitously aggregate around fish farms as a consequence of the introduction of new habitat and the easy availability of food—fish farms act as enhanced fish aggregation devices (FADs). The influence of food pellets on the composition of wild fish has been detected in recent studies on salmon, sea bass and sea bream aquaculture, with increased levels of linoleic acid (18:2n-6) and a low n-3/n-6 ratio as clear indicators of the consumption of food pellets from the farms. The potential ecological and physiological effects on wild fish are presently unknown. In the present article, guidelines are proposed for the investigation and use of terrestrial FAs to track the effects of coastal aquaculture on wild fish communities and local fisheries, as well as the benefits or limitations of this technique

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Determination of food sources of marine invertebrates from a subtidal sand community using analyses of fatty acids and stable isotopes

Cited by 50 publications

References 38 publications

Spatial variation in basal resources supporting benthic food webs revealed for the inner continental shelf

Spatial variation in basal resources supporting benthic food webs revealed for the inner continental shelf

Estimates of carbon turnover rates in the sea cucumber Apostichopus japonicus (Selenka) using stable isotope analysis: the role of metabolism and growth

Monitoring the influence of marine aquaculture on wild fish communities: benefits and limitations of fatty acid profiles

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