Scaling of bite force corresponds with ontogenetic niche shifts in coastal elasmobranchs DOI Creative Commons
Joshua A. Cullen, Christopher D. Marshall

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: Nov. 28, 2024

Introduction Predators, such as sharks, play important ecological roles in coastal ecosystems when abundant and these change over ontogeny. However, shifts role are often not evaluated light of feeding performance. Bite force is an ecologically relevant metric performance that has been associated with a species’ foraging niche, which may serve key factor constrains prey selection both within among sympatric species. Methods This study applies interdisciplinary approach to discern the ecomechanical relationships bull ( Carcharhinus leucas ), blacktip limbatus bonnethead sharks Sphyrna tiburo ) using biomechanics bulk stable isotopes (δ 13 C, δ 15 N). We sought (1) estimate theoretical bite scaling patterns ontogeny each species, (2) quantify niche breadth overlap (3) characterize relationship between changes Results Importantly, we found smaller conspecifics exhibited positive allometric force, whereas larger isometric scaling. Associations ontogenetic habitat diet were but sharks. Additionally, isotopic was greatest generalist followed by specialist Discussion These findings highlight animal measures critical drivers ofecological Size-based differences should be considered evaluating other taxa, determinant dietary shifts.

Language: Английский

Isotopic variability of the invasive blue crab Callinectes sapidus in the Gulf of Cadiz: Impacts and implications for coastal ecosystem management DOI Creative Commons
Elena Ortega-Jiménez, César Vílas, Gustavo F. de Carvalho-Souza

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 374, P. 124015 - 124015

Published: Jan. 10, 2025

The variability in trophic position and carbon isotopic signatures can provide information about their dietary flexibility its ability to adapt changing environmental conditions. impact of the invasive blue crab Callinectes sapidus was assessed by estimating niche using stable isotopes (δ

Language: Английский

Citations

0
Limited Shifts in Sulfur Stable Isotopes in Response to Hypoxia Exposure of Atlantic Croaker, Micropogonias undulatus DOI
Apria N. Valenza, Tyler R. Steube, Benjamin D. Walther

et al.

Estuaries and Coasts, Journal Year: 2025, Volume and Issue: 48(3)

Published: Feb. 21, 2025

Language: Английский

Citations

0
δ13C, δ15N, and δ34S isotope values from preserved elasmobranch jaws: implications for ecological studies from existing collections DOI Creative Commons

L. J. Holmes,

Charlie Huveneers, Vincent Raoult

et al.

Marine Environmental Research, Journal Year: 2025, Volume and Issue: 207, P. 107063 - 107063

Published: March 5, 2025

Stable isotope analysis has become a widely used biogeochemical tool owing to its capacity reveal predator foraging habitats, trophic level, and prey preferences. The breadth of applicable tissue types is quickly growing across taxa, including for elasmobranchs, with tooth isotopes gaining traction trace within-individual variation in ecology. Jaws museums private collections present unique opportunity access samples from rare or protected species size classes. However, most these jaws are chemically treated prevent degradation whiten teeth cartilage aesthetic long-term display. Prior using stable jaws, we need understand the impacts chemical treatments on carbon, nitrogen, sulphur isotopes. We compared preparation process (acid digestion) δ15N, δ13C, δ34S values dried preserved ethanol, bleach, hydrogen peroxide. investigated effects preservation methods three elasmobranch distinct morphologies: cownose rays (Rhinoptera bonasus) plates, gummy sharks (Mustelus antarcticus) small plate-like teeth, broadnose sevengill (Notorynchus cepedianus) larger serrated teeth. Preservation had no impact digestibility all dentition types. These findings support use display ecological studies

Language: Английский

Citations

0
Discrimination Factor of Sulphur Stable Isotope Ratios Between Pregnant Fin Whales and Their Foetuses DOI Creative Commons

Marc Ruiz‐Sagalés,

Asunción Borrell, Àlex Aguilar

et al.

Rapid Communications in Mass Spectrometry, Journal Year: 2025, Volume and Issue: 39(14)

Published: April 28, 2025

Abstract Rationale In‐utero synthesised tissues of mammals have often been used to infer maternal behaviour during gestation. Differences in δ 15 N or 13 C values between foetal and (foetus–mother discrimination factors) are well established, but they remain uncertain for 34 S values. This study addresses this gap by investigating such fin whale muscle ( Balaenoptera physalus ) its potential variation throughout Methods We analysed 11 pregnant whales their respective foetuses. Samples were obtained from individuals feeding off northwestern (NW) Spain the 1983–1985 summer seasons. Yearday (0–365) length at moment sampling considered proxies gestation stage effect on factors was examined. The determined continuous flow isotope ratio mass spectrometry. Results positively correlated. higher (M ± SD = 19.2 0.3 ‰) compared one 18.6 0.4 ‰), with a foetus–mother Δ 0.59 0.15 ‰. observed enrichment may be due differences isotopic turnover rates, amino acid metabolism, and/or dietary patterns did not change yearday foetus length. Conclusions These findings relevant understanding foetal‐maternal drawing ecological inferences tissues. Further research is needed understand mechanisms driving fractionation under different scenarios.

Language: Английский

Citations

0
Effects of wetland foraging and body size on bison hair sulfur, nitrogen, and carbon isotope compositions: Implications for wildlife conservation, archaeology, and palaeoecology DOI Creative Commons
Jessica Z. Metcalfe,

Wes Olson

Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2025, Volume and Issue: unknown, P. 113033 - 113033

Published: May 1, 2025

Language: Английский

Citations

0
Inter‐ and intraspecific variation in the degree of marine‐derived resources of amphidromous fishes DOI

Ryosuke Tanaka,

Taiga Kunishima,

Kentarou Hirashima

et al.

Journal of Fish Biology, Journal Year: 2025, Volume and Issue: unknown

Published: May 21, 2025

Abstract Migratory animals often transport allochthonous materials, energy or organisms from donor to recipient ecosystems, thereby affecting the dynamics of consumers, communities and ecosystems in systems. The biomass migrants is commonly assumed be equal that materials they transport, with inherent assumption migrant bodies are produced purely resources. However, extent which body composition many migratory consists [e.g., proportion total mass consisting resources, hereafter degree allochthony (DOA)] may gradually decrease if consume autochthonous resources during their migration. Ignoring this process leads an overestimation magnitude temporal features material subsidies. In study, we quantified DOA nine amphidromous fish species migrate marine rivers, using sulphur stable isotope ( δ 34 S) analysis. varied substantially among (11%–82%) even within Sicyopterus japonicus had highest DOA: 22%–97%). Species larger sizes tended exhibit a lower DOA. This trend was also observed at level for six species, five showing additional pattern later migrating individuals These results imply quantifying important accurately estimating subsidies across owing upstream migration fish. Life‐history studies fishes crucial elucidating mechanisms behind inter‐ intraspecific variation DOA, ultimately contributes better understanding marine‐river ecosystem linkages mediated by these fishes.

Language: Английский

Citations

0
What it means to be marine: Sulfur isotope variability in the historical Chesapeake Bay ecosystem DOI Creative Commons
Eric Guiry,

J. Ryan Kenedy,

Leah Stricker

et al.

Journal of Archaeological Science, Journal Year: 2025, Volume and Issue: 179, P. 106265 - 106265

Published: May 21, 2025

Language: Английский

Citations

0
Stable isotope analyses of lacustrine chitinous invertebrate remains: Analytical advances, challenges and potential DOI Creative Commons
Angela L. Lamb, Benjamin D. Barst, Clayton D. Elder

et al.

Quaternary Science Reviews, Journal Year: 2024, Volume and Issue: 346, P. 109067 - 109067

Published: Nov. 16, 2024

Language: Английский

Citations

3
Using stable-isotope analysis to assess recent diet and habitat use of stranded green turtles (Chelonia mydas) DOI Creative Commons
Joshua J. Glen, Christina A. Buelow, Max D. Campbell

et al.

Wildlife Research, Journal Year: 2024, Volume and Issue: 51(12)

Published: Dec. 8, 2024

Context Gaining a better understanding of the foraging ecology green turtles (Chelonia mydas) in different regions can improve effectiveness conservation and management strategies for this species. New South Wales (NSW), eastern Australia, has been identified as region requiring improved information on habitat use by turtles. Aims The aim study was to stable-isotope analyses investigate diet composition found stranded along NSW coastline from 2018 2021. Methods This measured δ13C, δ15N, δ34S macrophyte (mangrove, seagrass, algae) samples collected coastline, between March June 2021, epidermis tissue that same In addition, values animals known, or expected, be consumed were sourced literature. Macrophyte mapped display spatial variations, then combined with literature-sourced animal matter isotope into mixing models. Mixing models used determine structure each turtle, their similarity regional infer potential locations. Key results High variation present sources limiting recent locations δ15N turtle indicated most sampled feeding two three trophic levels above primary producers within algal-based food webs. suggested these webs predominantly supported algae (mean ± s. d. = 51.2 6.1%) material (31.4 4.7%), mangrove (13.4 2.0%) seagrass (4.0 2.5%) representing much smaller proportions overall composition. Conclusions showed feed primarily algae-dominated webs, evidence omnivory. These findings suggest individuals compositions alternative those Queensland counterparts, who seagrass-dominated habitats. Management programs should focus anthropogenic disturbances Implications novel finding demonstrated importance habitats south-eastern Australia. generated isoscapes are useful examining isotopic variations macrophytes coastline.

Language: Английский

Citations

1
Scaling of bite force corresponds with ontogenetic niche shifts in coastal elasmobranchs DOI Creative Commons
Joshua A. Cullen, Christopher D. Marshall

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: Nov. 28, 2024

Introduction Predators, such as sharks, play important ecological roles in coastal ecosystems when abundant and these change over ontogeny. However, shifts role are often not evaluated light of feeding performance. Bite force is an ecologically relevant metric performance that has been associated with a species’ foraging niche, which may serve key factor constrains prey selection both within among sympatric species. Methods This study applies interdisciplinary approach to discern the ecomechanical relationships bull ( Carcharhinus leucas ), blacktip limbatus bonnethead sharks Sphyrna tiburo ) using biomechanics bulk stable isotopes (δ 13 C, δ 15 N). We sought (1) estimate theoretical bite scaling patterns ontogeny each species, (2) quantify niche breadth overlap (3) characterize relationship between changes Results Importantly, we found smaller conspecifics exhibited positive allometric force, whereas larger isometric scaling. Associations ontogenetic habitat diet were but sharks. Additionally, isotopic was greatest generalist followed by specialist Discussion These findings highlight animal measures critical drivers ofecological Size-based differences should be considered evaluating other taxa, determinant dietary shifts.

Language: Английский

Citations

0