Effect of tissue decomposition on stable isotope signatures of striped dolphins Stenella coeruleoalba and loggerhead sea turtles Caretta caretta

Payo‐Payo, Ana; Ruiz, B.; Cardona, Luís; Borrell, Asunción

doi:10.3354/ab00497

Cited by 51 publications

(40 citation statements)

References 48 publications

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“…According to Payo-Payo et al (2013), analyzing decomposition on stable isotope signatures of striped dolphins Stenella coeruleoalba, no statistical change in δ 13 C or δ 15 N over period of 62 days in muscle and skin samples from carcasses decomposing was found, showing that they can be used as reliable material for stable isotope analysis in probably other marine mammal species.…”

Section: Discussionmentioning

confidence: 99%

Use of carbon and nitrogen stable isotopes to study the feeding ecology of small coastal cetacean populations in southern Brazil

et al. 2013

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of carbon and nitrogen stable isotopes to study the feeding ecology of small coastal cetacean populations in southern Brazil. Biota Neotrop. 13(4): http://www.biotaneotropica.org.br/v13n4/en/abstract?article+bn01413042013Abstract: Samples from individuals of the populations of Sotalia guianensis (Guiana) and Pontoporia blainvillei (Franciscana) dolphins living in the Babitonga Bay estuary (26° 28' S/48° 50' W), and samples from individuals of a second population of P. blainvillei from a nearshore area (26° 38' S/48° 41' W), were collected and analyzed along with their prey between 2000 and 2006, to determine the carbon and nitrogen stable isotope ratios and to verify differences in their feeding ecology. No differences were found in the median ð 15 N values of Guiana (15.2‰) and Franciscana (15.9‰) dolphins living in Babitonga Bay, nor of nearshore Franciscana (15.0‰) individuals, suggesting no variation in the trophic level of these populations. However, the lack of more information on the isotopic compositions of their putative prey in the nearshore areas prevents the ability to draw definitive conclusions on this issue. The estuarine Franciscana and Guiana dolphin populations presented mean ð 13 C values of approximately -15.7‰, which were not statistically different from nearshore Franciscana individuals (-14.8‰). Based on stomach content analyses of these species from a previous study, it was reported that there was little overlap in the diet of estuarine Franciscanas and Guiana dolphins. However, based on the similarity of the ð 13 C values between these two species and of their putative prey, it appears that in fact there is an overlap in the diet of these two species. Based solely on stable isotope analysis, it was not possible to differentiate between estuarine and nearshore Franciscana populations, making it difficult to conclude whether captured nearshore specimens were indeed yearlong residents of these areas. Finally, this study suggests that Franciscana and Guiana dolphin populations are sharing the same resources, mostly L. brevis, D. rhombeus, and S. rastrifer. Therefore, the combination of resource sharing and commercial exploitation of their prey makes these two cetacean species vulnerable. Keywords: Pontoporia blainvillei, Sotalia guianensis, Babitonga Bay, feeding ecology, trophic level.HARDT, F.A.S., CREMER, M.J., TONELLO JUNIOR, A.J., BELLANTE, A., BUFFA, G., BUSCAINO, G., MAZZOLA, S., BARRETO, A.S., MARTINELLI, L.A. & ZUPPI, G.M. O uso dos isótopos estáveis de carbono e nitrogênio para o estudo da ecologia de populações de pequenos cetáceos costeiros no sul do Brasil. Biota Neotrop. 13(4): http://www.biotaneotropica.org.br/v13n4/pt/abstract?article+bn01413042013Resumo: Amostras de tecido de indivíduos pertencentes às populações de Sotalia guianensis (boto-cinza) e Pontoporia blainvillei (toninha) que vivem no estuário da Baía da Babitonga (26° 28' S/48° 50' W) e de uma segunda população de P. blainvillei da área costeira (26° 38' S/48° 41' W) foram coletadas entre os anos 2000 e 2006 para ...

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Section: Discussionmentioning

confidence: 99%

Use of carbon and nitrogen stable isotopes to study the feeding ecology of small coastal cetacean populations in southern Brazil

et al. 2013

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“…Because lipid extraction is unlikely to affect the δ 13 C or δ 15 N values of scute, we are confident that the samples in this study are comparable. [23,34,35] Juvenile [36] Epidermis Adult [11,28,[37][38][39][40] Juvenile [20,36,[41][42][43][44] Hatchling [20,38] Whole blood Juvenile [36] Red blood cells Adult [39,45] Juvenile [20,46] Hatchling [20] Plasma Adult [39] Juvenile [20,46,47] Hatchling [20] Muscle Juvenile [36,44] Hatchling [48] Bone Adult [49] Juvenile [50][51][52] Yolk Egg [9,35,[53][54][55] Whole egg Egg [50] Whole embryo Egg [50] Whole hatchling Hatchling [50] H. Scute biopsies were glued ventral side down with the dorsal surface (oldest tissue) exposed, and 50 μm layers were obtained using a carbide end mill (Sherline 5100 with digital readout; Vista, CA, USA). This interval was selected as the smallest interval that would provide sufficient sample mass for stable isotope analy...…”

Section: Sample Preparationmentioning

confidence: 99%

Stable isotopic comparison between loggerhead sea turtle tissues

Zanden

Tucker

Bolten

et al. 2014

Rapid Commun. Mass Spectrom.

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Whereas both epidermis and scute samples are commonly sampled from nesting sea turtles to study trophic ecology and habitat use, the data from these studies have not been comparable without reliable tissue-to-tissue conversions. The equations provided here allow isotopic datasets using the two tissues to be combined in previously published and subsequent studies of sea turtle foraging ecology and migratory movement. In addition, we recommend that future isotopic comparisons between tissues of any organism utilize linear regressions to calculate tissue-to-tissue conversions.

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“…Samples for stable isotope analyses can be relatively decomposed (Payo‐Payo et al . ) or can consist of inorganic tissue, such as teeth and bone (DeNiro ). Stable isotopes of the organic carbon collected from dolphin teeth or skin have been used to characterize offshore and coastal populations (Walker et al .…”

Section: Means Standard Deviations and δ N For Isotope Signatures mentioning

confidence: 99%

“…Samples for stable isotope analyses can be relatively decomposed (Payo-Payo et al 2013) or can consist of inorganic tissue, such as teeth and bone (DeNiro 1987). Stable isotopes of the organic carbon collected from dolphin teeth or skin have been used to characterize offshore and coastal populations , Olin et al 2012, Wilson et al 2013), age and sex related feeding patterns (Nino-Torres et al 2006, Knoff et al 2008, Rossman et al 2015, and historical changes in trophic status .…”

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confidence: 99%

Sources of stable isotope variation among stranded Western Atlantic dolphins (Tursiops truncatus) in North Carolina

MacAvoy

Cortese

Cybulski

et al. 2017

Marine Mammal Science

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Effect of tissue decomposition on stable isotope signatures of striped dolphins Stenella coeruleoalba and loggerhead sea turtles Caretta caretta

Cited by 51 publications

References 48 publications

Use of carbon and nitrogen stable isotopes to study the feeding ecology of small coastal cetacean populations in southern Brazil

Use of carbon and nitrogen stable isotopes to study the feeding ecology of small coastal cetacean populations in southern Brazil

Stable isotopic comparison between loggerhead sea turtle tissues

Sources of stable isotope variation among stranded Western Atlantic dolphins (Tursiops truncatus) in North Carolina

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