Muscle δ13C change in Nile tilapia (Oreochromis niloticus): Effects of growth and carbon turnover

Zuanon, Jener Alexandre Sampaio; Pezzato, Antônio Celso; Pezzato, Luiz Edivaldo; Passos, José Raimundo de Souza; Barros, Margarida Maria; Ducatti, Carlos

doi:10.1016/j.cbpb.2006.06.009

Cited by 26 publications

(24 citation statements)

References 22 publications

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“…Exponential equations as a function of time and coefficients for determining feces from C 3 -FA and C 4 -SM treatments are shown in Tables 3 and 4 and are in accordance with those models proposed by Ducatti et al (2002) and Zuanon et al (2006). These authors confirmed that this technique can be used for animals during their growth phase, as was the case in this study, as according to Millward (1989), generally speaking, the mechanisms Table 3 Exponential equations for isotopic dilutions as a function of time for animal feces in C 3 -FA treatment with their respective coefficients of determination (R 2 for regulating the muscle tissue in fish are comparable to mammal animals.…”

Section: Resultsmentioning

confidence: 53%

Stable isotopes for determining carbon turnover in sheep feces and blood

et al. 2012

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a b s t r a c tThe objective of this work was to evaluate carbon turnover and half-life in feces and blood from sheep fed on C 3 and C 4 plant diets, using the stable isotope technique. Eight Santa Ines sheep were randomly distributed between two treatments: the first consisted of animals that were fed alfalfa hay, and the second consisted of animals that were fed corn silage only. Function of time was used to measure carbon turnover rate. At steady state, the half life for carbon isotopic enrichment between food and feces is 1.2 and 1.0 days for alfalfa hay and corn silage treatments, respectively. For blood data collection the time was insufficient to reach the isotope equilibrium level, indicating a slow carbon exchange between diet and blood. It is concluded that blood has a slow turnover, indicating the isotope signal for the former diets. Feces, by contrast, have a quick turnover, indicative of their recent diets.

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Section: Resultsmentioning

confidence: 53%

Stable isotopes for determining carbon turnover in sheep feces and blood

et al. 2012

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“…We used stable isotope analysis to characterize diet, and because isotope ratios are sensitive to turnover following diet switches (Vander Zanden et al 2015), our experiments were set for a period of 3 months to allow for enough time for tissue turnover by the macroinvertebrate community in case experimental resources were assimilated (a 75% invertebrate tissue turnover takes about 5-10 days cf. Fish muscle tissue turnover rates reported in the literature can be highly variable (Garcia et al 2007), although incorporation of carbon from new resources has been reported to take less than 3 months in rapidly growing organisms (Hesslein et al 1993;Zuanon et al 2006;Vander Zanden et al 2015). We also wanted to prevent confounding seasonal effects and ended our experiment after 3 months to avoid overlap with novel resources that may occur at the start of the rainy season.…”

Section: Experimental Design Sample Collections and Preparationmentioning

confidence: 99%

Responses of aquatic food webs to the addition of structural complexity and basal resource diversity in degraded Neotropical streams

et al. 2017

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The loss of riparian forests can disrupt the structure and function of lotic ecosystems through increased habitat homogenization and decreased resource diversity. We conducted a field experiment and manipulated structural complexity and basal resource diversity to determine their effect on multiple aspects of community and food-web structure of degraded tropical streams. In-stream manipulations included the addition of woody debris (WD) and the addition of wood and leaf packs (WLP). The addition of structural complexity to degraded streams promoted detritus retention and had a positive effect on stream taxonomic richness, abundance and biomass. At the conclusion of the experiment, abundance and richness in the WD-treated reaches increased by over 110% and 80%, respectively, while abundance and richness in the WLP-treated reaches increased by over 280% and 170% respectively. Wood debris and leaves were consumed only by few taxa. Detritivorous taxa were the most abundant trophic guild at the beginning and at the end of the experiment. Food webs in treated reaches were relatively more complex in terms of links and species at the conclusion of the experiment, with highest maximum food chain length in the WD treatments and highest number of trophic species, links, link density, predators and prey at the WLP treatment. Despite differences observed in diet-based food webs, there was little variation in isotopic niche space, likely due to the high degree of omnivory and trophic redundancy, which was attributed to the importance of fine detritus that supported a broad range of consumers. Even in these degraded streams, aquatic taxa responded to the addition of increased complexity suggesting that these efforts may be an effective first step to restoring the structure and function of these food webs.

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“…Pinnegar & Polunin, 1999;Mill et al, 2007;Sweeting et al, 2007a, b) and/or those with aquaculture interest (e.g. Zuanon et al, 2006). For freshwater fishes, such as those of the Cyprinidae family, there remains limited knowledge for most species on their discrimination factors and how these are affected by diet and temperature.…”

Section: Introductionmentioning

confidence: 99%

Stable isotope discrimination factors of omnivorous fishes: influence of tissue type, temperature, diet composition and formulated feeds

Britton

Busst

2017

Hydrobiologia

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Application of stable isotope data to trophic studies requires understanding of factors influencing the isotopic discrimination factor (D) between consumers and their prey resources. This is missing for many omnivorous species, despite their diet and environment potentially impacting D. The effects of temperature, diet (including formulated feeds) and tissue type on D 13 C and D 15 N were thus tested experimentally. A temperature experiment exposed three species to identical diets at 18 and 23°C, whereas a diet experiment exposed one species to four diets at 18°C. At 23°C, C:N ratios, D 13 C and D 15 N were generally elevated versus 18°C. After lipid correction, tissue/species-specific differences at 23°C in D 13C and D 15 N were up to 0.73 and 0.54% higher, respectively. Across the four diets, there were also significant differences in D 13 C and D 15 N between a natural diet and diets based on formulated feeds. D 13 C and D 15 N of muscle were 1.51 to 2.76% and 3.13 to 5.44%, respectively. Highest D for both isotopes was from a formulated feed based on plant material that resulted in lower dietary protein content and quality. Thus, diet and environment fundamentally affected the isotopic discrimination factors and these factors require consideration within trophic studies based on stable isotopes.

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Muscle δ13C change in Nile tilapia (Oreochromis niloticus): Effects of growth and carbon turnover

Cited by 26 publications

References 22 publications

Stable isotopes for determining carbon turnover in sheep feces and blood

Stable isotopes for determining carbon turnover in sheep feces and blood

Responses of aquatic food webs to the addition of structural complexity and basal resource diversity in degraded Neotropical streams

Stable isotope discrimination factors of omnivorous fishes: influence of tissue type, temperature, diet composition and formulated feeds

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