Data from: Field metabolic rates of teleost fishes are recorded in otolith carbonate

负责人：

关键词：

field metabolic rate;d13C;Gadus morhhua;otolith

DOI：

doi:10.5061/dryad.1hg55vm

摘要：

Field metabolic rate (FMR) is key to understanding individual and population-level responses to environmental changes, but is challenging to measure in field conditions, particularly in aquatic environments. Here we show that FMR can be estimated directly from the isotopic composition of carbon in fish otoliths (?13Coto). We describe the relationship between ?13Coto values and oxygen consumption rate, and report results from laboratory experiments relating individual-level measurements of oxygen consumption rates to ?13Coto values in Atlantic cod (Gadus morhua). We apply our new ?13Coto metabolic proxy to existing ?13Coto data from wild cod and four deepwater fish species to test the validity of inferred FMR estimates. The ?13Coto metabolic proxy offers a new approach to study physiological ecology in free-ranging wild fishes. Otolith-based proxies for FMR are particularly promising as they allow retrospective assessment of time-integrated, individual-level FMR throughout an individual fish’s life history.

Data from: Hitting the moving target: modelling ontogenetic shifts with stable isotopes reveals the importance of isotopic turnover

负责人：

Eric Hertz

关键词：

Bayesian Chinook Salmon Niche Ontogeny Trophic level

DOI：

doi:10.5061/dryad.pp75d

摘要：

. Stable isotope analysis is a powerful tool to assess these shifts, with δ15N providing a measure of trophic level and δ13C a measure of energy source. Previous applications

Data from: Important impacts of tissue selection and lipid extraction on ecological parameters derived from stable isotope ratios

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关键词：

tissue selection lipid extraction stable isotope analysis

DOI：

doi:10.5061/dryad.7tm07

摘要：

1. The nitrogen (δ15N) and carbon (δ13C) isotope ratios of animal tissues can help identify the composition of diets and open up a myriad

Data from: Fast-slow life history is correlated with individual differences in movements and prey selection in an aquatic predator in the wild

负责人：

Nakayama, Shinnosuke

关键词：

animal personality pace-of-life syndrome life-history trade-offs fast-slow continuum activity

DOI：

doi:10.5061/dryad.7t3t3

摘要：

ater reliance on prey from pelagic pathways (indicated by lower δ13C). Further, individuals with faster juvenile growth were found to stay active for a longe

Data from: Isotopic niche reflects stress-induced variability in physiological status

负责人：

Karlson, Agnes

关键词：

trophic niche stable isotopes environmental contaminants nutritional status growth and body condition invertebrates

DOI：

doi:10.5061/dryad.8h439

摘要：

and δ13C and δ15N values to derive isotope niche metrics. As hypothesized, greater isotopic niche estimates were derived for the stressed animals compared

Data from: Seasonal and annual differences in the foraging ecology of two gull species breeding in sympatry and their use of fishery discards

负责人：

Calado, Joana G.

关键词：

niche partitioning isotopic ecology diet composition

DOI：

doi:10.5061/dryad.m8t2k

摘要：

foraging areas (δ13C) and/ or trophic levels (δ15N) between the two species in the non-breeding season. During both the all-year and non-breeding period

Data from: Characterizing niche differentiation among marine consumers with amino acid ?13C fingerprinting

负责人：

关键词：

marine food webs;d13CAA fingerprinting;Baltic Sea;d13C of essential amino acids

DOI：

doi:10.5061/dryad.crjdfn321

摘要：

Marine food webs are highly compartmentalized and characterizing the trophic niches among consumers is important for predicting how impact from human activities affect the structuring and functioning of marine food webs. Biomarkers such as bulk stable isotopes have proven to be powerful tools to elucidate trophic niches, but they may lack in resolution, particularly when spatio-temporal variability in a system is high. To close this gap, we investigated whether carbon isotope (?¹³C?) patterns of essential amino acids (EAAs), also termed d13CAA fingerprints, can characterize niche differentiation in a highly dynamic marine system. Specifically, we tested the ability of d13CAA fingerprints to differentiate trophic niches among six functional groups and ten individual species in the Baltic Sea. We also tested whether fingerprints of the common zooplanktivorous fishes, herring and sprat, differ among four Baltic Sea regions with different biochemical conditions and phytoplankton assemblages. Additionally, we investigated how these results compared to bulk C and N isotope data for the same sample set. We found significantly different d13CAA fingerprints among all six functional groups. Species differentiation was in comparison less distinct, due to partial convergence of the species’ fingerprints within functional groups. Herring and sprat displayed region specific d13CAA fingerprints indicating that this approach could be used as a migratory marker. Niche metrics analyses showed that bulk isotope data had a lower power to differentiate between trophic niches than ?13CAA fingerprinting. We conclude that d13CAA fingerprinting has a strong potential to advance our understanding of ecological niches, and trophic linkages from producers to higher trophic levels in dynamic marine systems. Given how management practices of marine resources and habitats are reshaping the structure and function of marine food webs, implementing new and powerful tracer methods are urgently needed to improve the knowledge base for policy makers.