Diet‐tissue discrimination factors and turnover of carbon and nitrogen stable isotopes in tissues of an adult predatory coral reef fish, <i>Plectropomus leopardus</i>

Matley, Jordan K.; Fisk, Aaron T.; Tobin, Andrew J.; Heupel, Michelle R.; Simpfendorfer, Colin A.

doi:10.1002/rcm.7406

Cited by 66 publications

(69 citation statements)

References 105 publications

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“…This apparent hierarchy in the turnover rates of fish muscle, fin and scale tissue was a contrast to Matley et al (2016) who revealed in an adult coral reef fish Table 3 Best-fitting models for (1) time-based models and (2) growth-based models for 15 N turnover in muscle, fin and scale tissues of Barbus barbus, where c, turnover rate constant; m, metabolic constant; k, growth constant; Pm, relative contributions of metabolism to turnover; Pg, relative contributions of growth to turnover; Dm, relative contribution of metabolism to turnover; Dg, relative contribution of growth to turnover; T 0.5 , half-life (days); G 0.5 , half-life (g); df, estimated equilibrium value Plectropomus leopardus (Lacepède, 1802) muscle had a relatively long turnover rate compared with fin tissue. Other studies have, however, revealed that considerable differences in turnover rates can be apparent between fish tissues (Buchheister & Latour, 2010;Xia et al, 2013b), although their differences are often only minor (Hesslein et al, 1993;Sweeting et al, 2005;McIntyre & Flecker, 2006).…”

Section: Discussionmentioning

confidence: 95%

Tissue-specific turnover rates of the nitrogen stable isotope as functions of time and growth in a cyprinid fish

Busst

Britton

2017

Hydrobiologia

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Ecological applications of stable isotope data require knowledge on the isotopic turnover rate of tissues, usually described as the isotopic half-life in days (T 0.5 ) or the change in mass (G 0.5 ). Ecological studies increasingly analyse tissues collected nondestructively, such as fish fin and scales, but there is limited knowledge on their turnover rates. Determining turnover rates in situ is challenging, with ex situ approaches preferred. Correspondingly, T 0.5 and G 0.5 of the nitrogen stable isotope (d 15 N) were determined for juvenile barbel Barbus barbus (5.5 ± 0.6 g starting weight) using a diet-switch experiment. d 15 N data from muscle, fin and scales were taken during a 125 day post diet-switch period. Whilst isotopic equilibrium was not reached in the 125 days, the d 15 N values did approach those of the new diet. The fastest turnover rates were in more metabolically active tissues, from muscle (highest) to scales (lowest). Turnover rates were relatively slow; T 0.5 was 84 (muscle) to 145 (scale) days; G 0.5 was 1.39 9 body mass (muscle) to 2.0 9 body mass (scales), with this potentially relating to the slow growth of the experimental fish. These turnover estimates across the different tissues emphasise the importance of estimating half-lives for focal taxa at species and tissue levels for ecological studies.

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Section: Discussionmentioning

confidence: 95%

Tissue-specific turnover rates of the nitrogen stable isotope as functions of time and growth in a cyprinid fish

Busst

Britton

2017

Hydrobiologia

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“…Lethal sampling is, however, not desirable, particularly when studying highly threatened fish species or where anaesthesia may reduce the ability of the animal to recover. Several recent studies have used non‐lethal sampling approaches, including the sampling of mucus, scales, blood, and fin, as alternatives to white muscle. For most fish species, fin tissue has been found to be the most isotopically similar to muscle tissue, making fins viable alternatives to muscle tissue .…”

Section: Introductionmentioning

confidence: 99%

The influence of diet composition and tissue type on the stable isotope incorporation patterns of a small‐bodied southern African minnow Enteromius anoplus (Cypriniformes, Cyprinidae)

Kambikambi

Chakona

2019

Rapid Comm Mass Spectrometry

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Rationale In trophic ecology, the use of stable isotope data relies on the general understanding of isotope turnover rates and diet‐to‐tissue discrimination factors (DTDFs). Recent studies on the application of stable isotope data have shown that isotope turnover rates and DTDFs can be influenced by many factors, including diet composition and tissue type. This study investigated the influence of diet composition and tissue type on stable isotope incorporation patterns in a small‐bodied African minnow, the chubbyhead barb Enteromius anoplus. Methods The isotopic incorporation patterns of carbon (δ13C values) and nitrogen (δ15N values) into white muscle and caudal fin tissues of the chubbyhead barb were examined using two isotopically different diets. Controlled‐diet stable isotope feeding trials using a fishmeal‐based diet (diet 1) and a soya‐based diet (diet 2) were conducted over a 180‐day period for the chubbyhead barb. Results The two diets had contrasting isotopic incorporation patterns: diet 1 was associated with progressively high δ13C and δ15N values, whereas diet 2 was associated with progressively low δ13C and δ15N values over time for both muscle and fin tissues. The δ13C turnover rates were similar for both tissues (56 and 61 days), whereas the δ15N turnover rates differed between fin and muscle tissue in both diets (diet 1 = 4 and 130 days, and diet 2 = 72 and 300 days, respectively). The DTDFs were similar for both tissues in diet 1 (Δ13C: −3.96 to −2.62‰, Δ15N: 1.98 to 2.61‰) and diet 2 (Δ13C: 4.05 to 5.24‰, Δ15N: 8.45 to 9.69‰). Conclusions These results suggest that fin tissue can potentially be used as an alternative for muscle tissue in food web studies with a reasonable level of error. The isotopic turnover rate and DTDFs estimates for E. anoplus, however, require consideration of diet composition because different diets may differ in their isotopic incorporation patterns.

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“…; Summer Flounder Paralichthys dentatus , t 1/2 = 49–107 d: Buchhesiter and Latour ; Leopard Coralgrouper Plectropomus leopardus , t 1/2 = 83 d: Matley et al. ) that may have reflected the entire summer. However, we only considered late sources for Sheepshead liver because liver quickly turns over (e.g., Japanese Seabass, t 1/2 = 5–14 d: Suzuki et al.…”

Section: Methodsmentioning

confidence: 99%

“…; Summer Flounder, t 1/2 = 10–20 d: Buchhesiter and Latour ; Leopard Coralgrouper, t 1/2 = 10 d: Matley et al. ), and it was unlikely that sources from early summer made a substantial contribution to liver isotope composition in late summer.…”

Section: Methodsmentioning

confidence: 99%

Trophic Ecology of Sheepshead and Stone Crabs at Oil and Gas Platforms in the Northern Gulf of Mexico's Hypoxic Zone

et al. 2019

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Oil and gas platforms (platforms) may provide important habitat for reef‐associated organisms in the Gulf of Mexico's hypoxic zone. While summer hypoxia typically affects the bottom 3.0 m of the water column, platforms span from the bottom to above the surface and provide hard substrate in oxygenated waters overlaying hypoxia. However, little is known about the effects of hypoxia on organisms living at these platforms. We compared diets of Sheepshead Archosargus probatocephalus and Gulf stone crabs Menippe adina during early and late summer at platforms with mild (shoal platforms) and intense hypoxia (seaward platforms) using a combination of stable isotopes (δ13C and δ15N) and gut contents analyses. We hypothesized that diets at seaward platforms would shift from bottom to platform‐dwelling prey during late summer when hypoxia had fully developed and decimated benthic communities, but no such effect was found. Barnacles (Balanidae) were the most common prey found in Sheepshead guts for all samples collected (64.1% of gut contents). Sheepshead gut contents showed high predation of mantis shrimp (Squillidae; 35.2% of gut contents) soon after the formation of hypoxia at seaward platforms, likely reflecting Sheepshead exploiting benthic prey that were vulnerable because of hypoxia. These findings indicate that hypoxia affected the behavior of mantis shrimp in a way that altered their availability for Sheepshead associated with platforms. Comparisons of Sheepshead and stone crab isotope values (δ13C and δ15N) to those of their potential prey and basal sources suggested a high dependence on barnacles (proxy for water column particulate organic matter) and filamentous algae throughout the summer. However, comparisons of isotope values in early and late summer indicated no apparent effect of hypoxia. High contributions of barnacles to Sheepshead diet showed that platform‐dwelling prey were an important resource for Sheepshead.

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Diet‐tissue discrimination factors and turnover of carbon and nitrogen stable isotopes in tissues of an adult predatory coral reef fish, Plectropomus leopardus

Cited by 66 publications

References 105 publications

Tissue-specific turnover rates of the nitrogen stable isotope as functions of time and growth in a cyprinid fish

Tissue-specific turnover rates of the nitrogen stable isotope as functions of time and growth in a cyprinid fish

The influence of diet composition and tissue type on the stable isotope incorporation patterns of a small‐bodied southern African minnow Enteromius anoplus (Cypriniformes, Cyprinidae)

Trophic Ecology of Sheepshead and Stone Crabs at Oil and Gas Platforms in the Northern Gulf of Mexico's Hypoxic Zone

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