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Sardenne F, Raynon T, Munaron JM, van der Lingen CD, Sadio O, Diop K, Brosset P, Lebigre C, Soudant P, Vagner M, Pecquerie L. Lipid-correction models for δ 13C values across small pelagic fishes (Clupeiformes) from the Atlantic Ocean. MARINE ENVIRONMENTAL RESEARCH 2023; 192:106213. [PMID: 37783159 DOI: 10.1016/j.marenvres.2023.106213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/22/2023] [Accepted: 09/26/2023] [Indexed: 10/04/2023]
Abstract
The interpretation of δ13C values in trophic ecology requires standardization of the lipid content of organisms estimated through their C:N ratio. To avoid time-consuming lipid extractions, the use of mathematical corrections has been developed for many years, and the conclusions generally point in the direction of species-specific adjustment of the models. This study aimed at defining the maximum taxonomic level required to obtain the best corrected δ13C values in small pelagic fish of the order Clupeiformes. δ13C values of six species were analyzed bulk and lipid-free, and were used to fit and validate linear and mass-balance models at different taxonomic levels. Despite a species effect combined with the C:N ratio effect, the corrected δ13C values produced by a global model for the Clupeiformes were as good as or better when compared to lipid-free samples than those produced by species-specific models, paving the way for possible generalization to other species in this order. At the order level, the linear model outperformed the mass-balance model.
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Affiliation(s)
- Fany Sardenne
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, F-29280, Plouzané, France.
| | - Thomas Raynon
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, F-29280, Plouzané, France
| | | | - Carl D van der Lingen
- Department of Forestry, Fisheries and the Environment (DFFE), Cape Town, South Africa
| | - Oumar Sadio
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, Dakar, Senegal
| | - Khady Diop
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, Dakar, Senegal
| | - Pablo Brosset
- UMR DECOD, Ifremer, INRAE, L'Institut Agro, Plouzané, France
| | | | - Philippe Soudant
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Marie Vagner
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Laure Pecquerie
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, F-29280, Plouzané, France
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Vianna-Gatts F, Montanini G, Azevedo AF, Lailson-Brito J, Bisi TL. Feeding ecology based on stable carbon and nitrogen isotopes: A comparative study on different Guiana dolphin tissues. MARINE ENVIRONMENTAL RESEARCH 2023; 192:106234. [PMID: 37871468 DOI: 10.1016/j.marenvres.2023.106234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/14/2023] [Accepted: 10/17/2023] [Indexed: 10/25/2023]
Abstract
Different tissues are used for stable isotope analysis in cetacean investigations. However, variation in the isotopic composition of tissues with different turnover rates has been reported for cetaceans. To better understand stable carbon and nitrogen isotopes (δ13C and δ15N) in skin compared to other tissues, this study assessed the isotopic variation among the liver, muscle, and skin of Guiana dolphins (Sotalia guianensis), as well as the influence of sex on these variations. No differences were found in δ13C among male tissues, but females showed lower values in the liver compared to muscle and skin. Differences in δ15N were observed among all tissues, with different variation patterns for males and females. Four females were distinguished from males and other females by their 13C depletion in all tissues and δ15N variation pattern. We conclude that skin and muscle may be equivalent in δ13C values for Guiana dolphins. The multiple-tissue analysis brings new insights into their feeding ecology and provides background for stable isotope analysis using non-destructive sampling techniques in small cetaceans.
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Affiliation(s)
- Fernanda Vianna-Gatts
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Professora M. G. do N. Izabel Gurgel" (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Térreo, 20550-013, Rio de Janeiro, Brazil; Programa de Pós-Graduação em Oceanografia, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, 4° andar, 20550-013, Rio de Janeiro, Brazil.
| | - Gleici Montanini
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Professora M. G. do N. Izabel Gurgel" (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Térreo, 20550-013, Rio de Janeiro, Brazil.
| | - Alexandre F Azevedo
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Professora M. G. do N. Izabel Gurgel" (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Térreo, 20550-013, Rio de Janeiro, Brazil; Programa de Pós-Graduação em Oceanografia, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, 4° andar, 20550-013, Rio de Janeiro, Brazil.
| | - José Lailson-Brito
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Professora M. G. do N. Izabel Gurgel" (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Térreo, 20550-013, Rio de Janeiro, Brazil; Programa de Pós-Graduação em Oceanografia, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, 4° andar, 20550-013, Rio de Janeiro, Brazil.
| | - Tatiana L Bisi
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Professora M. G. do N. Izabel Gurgel" (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Térreo, 20550-013, Rio de Janeiro, Brazil; Programa de Pós-Graduação em Oceanografia, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, 4° andar, 20550-013, Rio de Janeiro, Brazil.
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Riverón S, Raoult V, Slip DJ, Harcourt RG. Lipid extraction has tissue-dependent effects on isotopic values (δ 34 S, δ 13 C, and δ 15 N) from different marine predators. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2022; 36:e9346. [PMID: 35737589 PMCID: PMC9539579 DOI: 10.1002/rcm.9346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 05/31/2022] [Accepted: 06/22/2022] [Indexed: 06/15/2023]
Abstract
RATIONALE The use of sulfur isotopes to study trophic ecology in marine ecosystems has increased in the past decade. Unlike other commonly used isotopes (e.g., carbon), sulfur can better discriminate benthic and pelagic productivity. However, how lipid extraction affects sulfur isotopic values has not been assessed, despite its frequent use to remove lipid effects on δ13 C values. METHODS We used white muscle and liver samples from two species of sharks and skin samples from two species of pinnipeds (sea lion and fur seal) to assess the effects of lipid extraction on stable isotope values for δ34 S, δ13 C, and δ15 N. Isotopic values were determined using a continuous flow-isotope ratio mass spectrometer coupled to an elemental analyzer. RESULTS Lipid extraction significantly decreased δ34 S values in shark tissues, more so for liver than muscle (-4.6 ± 0.9‰ vs -0.8 ± 0.3‰, average change), with nearly no change in their standard deviations. Lipid extraction did not affect δ34 S values from pinniped skin samples (0.2 ± 0.8‰, average change). After lipid extraction, consistent increases in δ13 C values (0.2‰-7.3‰) were detected as expected, especially in tissue with high lipid content (C:N >4). After lipid extraction, significant increases in δ15 N values (0.5‰-1.4‰) were found in shark muscle and liver tissues. For pinniped skin samples, δ15 N values were not significantly lower after lipid extraction (-0.4‰ to -0.1‰). CONCLUSIONS Lipid extraction did not have a strong impact on δ34 S values of shark muscle and pinniped skin (≤1‰). However, our results suggest it is essential to consider the effects of lipid extraction when interpreting results from δ34 S values of shark liver tissue, as they significantly depleted values relative to bulk tissue (~5‰). This may reflect selective removal of sulfolipids and glutathione present in higher concentrations in the liver than in muscle and skin and requires further investigation.
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Affiliation(s)
- Sabrina Riverón
- Marine Predator Research Group, School of Natural SciencesMacquarie UniversitySydneyNew South WalesAustralia
| | - Vincent Raoult
- School of Environmental and Life SciencesUniversity of NewcastleOurimbahNew South WalesAustralia
- Marine Ecology GroupSchool of Natural SciencesMacquarie UniversitySydneyNew South WalesAustralia
| | - David J. Slip
- Marine Predator Research Group, School of Natural SciencesMacquarie UniversitySydneyNew South WalesAustralia
- Taronga Institute of Science and LearningTaronga Conservation Society AustraliaSydneyNew South WalesAustralia
| | - Robert G. Harcourt
- Marine Predator Research Group, School of Natural SciencesMacquarie UniversitySydneyNew South WalesAustralia
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Pereyra PER, Hallwass G, Poesch M, Silvano RAM. ‘Taking Fishers’ Knowledge to the Lab’: An Interdisciplinary Approach to Understand Fish Trophic Relationships in the Brazilian Amazon. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.723026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Trophic levels can be applied to describe the ecological role of organisms in food webs and assess changes in ecosystems. Stable isotopes analysis can assist in the understanding of trophic interactions and use of food resources by aquatic organisms. The local ecological knowledge (LEK) of fishers can be an alternative to advance understanding about fish trophic interactions and to construct aquatic food webs, especially in regions lacking research capacity. The objectives of this study are: to calculate the trophic levels of six fish species important to fishing by combining data from stable isotopes analysis and fishers’ LEK in two clear water rivers (Tapajós and Tocantins) in the Brazilian Amazon; to compare the trophic levels of these fish between the two methods (stable isotopes analysis and LEK) and the two rivers; and to develop diagrams representing the trophic webs of the main fish prey and predators based on fisher’s LEK. The fish species studied were Pescada (Plagioscion squamosissimus), Tucunaré (Cichla pinima), Piranha (Serrasalmus rhombeus), Aracu (Leporinus fasciatus), Charuto (Hemiodus unimaculatus), and Jaraqui (Semaprochilodus spp.). A total of 98 interviews and 63 samples for stable isotopes analysis were carried out in both rivers. The average fish trophic levels did not differ between the stable isotopes analysis and the LEK in the Tapajós, nor in the Tocantins Rivers. The overall trophic level of the studied fish species obtained through the LEK did not differ from data obtained through the stable isotopes analysis in both rivers, except for the Aracu in the Tapajós River. The main food items consumed by the fish according to fishers’ LEK did agree with fish diets as described in the biological literature. Fishers provided useful information on fish predators and feeding habits of endangered species, such as river dolphin and river otter. Collaboration with fishers through LEK studies can be a viable approach to produce reliable data on fish trophic ecology to improve fisheries management and species conservation in tropical freshwater environments and other regions with data limitations.
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Koch CW, Cooper LW, Woodland RJ, Grebmeier JM, Frey KE, Stimmelmayr R, Magen C, Brown TA. Female Pacific walruses (Odobenus rosmarus divergens) show greater partitioning of sea ice organic carbon than males: Evidence from ice algae trophic markers. PLoS One 2021; 16:e0255686. [PMID: 34411125 PMCID: PMC8376070 DOI: 10.1371/journal.pone.0255686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 07/21/2021] [Indexed: 11/25/2022] Open
Abstract
The expected reduction of ice algae with declining sea ice may prove to be detrimental to the Pacific Arctic ecosystem. Benthic organisms that rely on sea ice organic carbon (iPOC) sustain benthic predators such as the Pacific walrus (Odobenus rosmarus divergens). The ability to track the trophic transfer of iPOC is critical to understanding its value in the food web, but prior methods have lacked the required source specificity. We analyzed the H-Print index, based on biomarkers of ice algae versus phytoplankton contributions to organic carbon in marine predators, in Pacific walrus livers collected in 2012, 2014 and 2016 from the Northern Bering Sea (NBS) and Chukchi Sea. We paired these measurements with stable nitrogen isotopes (δ15N) to estimate trophic position. We observed differences in the contribution of iPOC in Pacific walrus diet between regions, sexes, and age classes. Specifically, the contribution of iPOC to the diet of Pacific walruses was higher in the Chukchi Sea (52%) compared to the NBS (30%). This regional difference is consistent with longer annual sea ice persistence in the Chukchi Sea. Within the NBS, the contribution of iPOC to walrus spring diet was higher in females (~45%) compared to males (~30%) for each year (p < 0.001), likely due to specific foraging behavior of females to support energetic demands associated with pregnancy and lactation. Within the Chukchi Sea, the iPOC contribution was similar between males and females, yet higher in juveniles than in adults. Despite differences in the origin of organic carbon fueling the system (sea ice versus pelagic derived carbon), the trophic position of adult female Pacific walruses was similar between the NBS and Chukchi Sea (3.2 and 3.5, respectively), supporting similar diets (i.e. clams). Given the higher quality of organic carbon from ice algae, the retreat of seasonal sea ice in recent decades may create an additional vulnerability for female and juvenile Pacific walruses and should be considered in management of the species.
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Affiliation(s)
- Chelsea W. Koch
- University of Maryland Center for Environmental Science, Solomons, Maryland, United States of America
- * E-mail:
| | - Lee W. Cooper
- University of Maryland Center for Environmental Science, Solomons, Maryland, United States of America
| | - Ryan J. Woodland
- University of Maryland Center for Environmental Science, Solomons, Maryland, United States of America
| | - Jacqueline M. Grebmeier
- University of Maryland Center for Environmental Science, Solomons, Maryland, United States of America
| | - Karen E. Frey
- Graduate School of Geography, Clark University, Worcester, Massachusetts, United States of America
| | - Raphaela Stimmelmayr
- North Slope Borough Department of Wildlife Management, Utqiaġvik, Alaska, United States of America
- Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska, United States of America
| | - Cédric Magen
- University of Maryland Center for Environmental Science, Solomons, Maryland, United States of America
| | - Thomas A. Brown
- Scottish Association for Marine Science, Oban, Scotland, United Kingdom
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Hoondert RPJ, van den Brink NW, van den Heuvel-Greve MJ, Ragas AMJ, Hendriks AJ. Variability in nitrogen-derived trophic levels of Arctic marine biota. Polar Biol 2020. [DOI: 10.1007/s00300-020-02782-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
AbstractStable isotopes are often used to provide an indication of the trophic level (TL) of species. TLs may be derived by using food-web-specific enrichment factors in combination with a representative baseline species. It is challenging to sample stable isotopes for all species, regions and seasons in Arctic ecosystems, e.g. because of practical constraints. Species-specific TLs derived from a single region may be used as a proxy for TLs for the Arctic as a whole. However, its suitability is hampered by incomplete knowledge on the variation in TLs. We quantified variation in TLs of Arctic species by collating data on stable isotopes across the Arctic, including corresponding fractionation factors and baseline species. These were used to generate TL distributions for species in both pelagic and benthic food webs for four Arctic areas, which were then used to determine intra-sample, intra-study, intra-region and inter-region variation in TLs. Considerable variation in TLs of species between areas was observed. This is likely due to differences in parameter choice in estimating TLs (e.g. choice of baseline species) and seasonal, temporal and spatial influences. TLs between regions were higher than the variance observed within regions, studies or samples. This implies that TLs derived within one region may not be suitable as a proxy for the Arctic as a whole. The TL distributions derived in this study may be useful in bioaccumulation and climate change studies, as these provide insight in the variability of trophic levels of Arctic species.
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Stable isotopes verify geographical origin of yak meat from Qinghai-Tibet plateau. Meat Sci 2020; 165:108113. [DOI: 10.1016/j.meatsci.2020.108113] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 03/13/2020] [Accepted: 03/13/2020] [Indexed: 11/21/2022]
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Cloyed CS, DaCosta KP, Hodanbosi MR, Carmichael RH. The effects of lipid extraction on δ
13
C and δ
15
N values and use of lipid‐correction models across tissues, taxa and trophic groups. Methods Ecol Evol 2020. [DOI: 10.1111/2041-210x.13386] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Carl S. Cloyed
- University Programs Dauphin Island Sea Lab Dauphin Island AL USA
| | - Kayla P. DaCosta
- University Programs Dauphin Island Sea Lab Dauphin Island AL USA
- Department of Marine Sciences University of South Alabama Mobile AL USA
| | - Matthew R. Hodanbosi
- University Programs Dauphin Island Sea Lab Dauphin Island AL USA
- Department of Marine Sciences University of South Alabama Mobile AL USA
| | - Ruth H. Carmichael
- University Programs Dauphin Island Sea Lab Dauphin Island AL USA
- Department of Marine Sciences University of South Alabama Mobile AL USA
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