Inter-individual variation in trophic history of Dosidicus gigas, as indicated by stable isotopes in eye lenses

Abstract Carbonate cave deposits (speleothems) have been used widely for paleoclimate reconstructions; however, few studies have examined the utility of other speleothem-forming minerals for this purpose. Here we demonstrate for the first time that stable isotopes (δ17O, δ18O and δD) of structurally-bound gypsum (CaSO4·2H2O) hydration water (GHW) can be used to infer paleoclimate. Specifically, we used a 63 cm-long gypsum stalactite from Sima Blanca Cave to reconstruct the climate history of SE Spain from ~ 800 BCE to ~ 800 CE. The gypsum stalactite indicates wet conditions in the cave and humid climate from ~ 200 BCE to 100 CE, at the time of the Roman Empire apogee in Hispania. From ~ 100 CE to ~ 600 CE, evaporation in the cave increased in response to regional aridification that peaked at ~ 500–600 CE, roughly coinciding with the transition between the Iberian Roman Humid Period and the Migration Period. Our record agrees with most Mediterranean and Iberian paleoclimate archives, demonstrating that stable isotopes of GHW in subaerial gypsum speleothems are a useful tool for paleoclimate reconstructions.

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Spatial and trophic preferences of jumbo squid Dosidicus gigas (D'Orbigny, 1835) in the central Gulf of California: ecological inferences using stable isotopes

Rapid Communications in Mass Spectrometry ◽

10.1002/rcm.8147 ◽

2018 ◽

Vol 32 (15) ◽

pp. 1225-1236 ◽

Cited By ~ 8

Author(s):

L.D. Trasviña-Carrillo ◽

A. Hernández-Herrera ◽

Y.E. Torres-Rojas ◽

F. Galván-Magaña ◽

A. Sánchez-González ◽

...

Keyword(s):

Stable Isotopes ◽

Gulf Of California ◽

Dosidicus Gigas ◽

Jumbo Squid ◽

Trophic Preferences

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Re-constructing nutritional history of Serengeti wildebeest from stable isotopes in tail hair: seasonal starvation patterns in an obligate grazer

Rapid Communications in Mass Spectrometry ◽

10.1002/rcm.7572 ◽

2016 ◽

Vol 30 (13) ◽

pp. 1461-1468 ◽

Cited By ~ 5

Author(s):

K. Rysava ◽

R. A. R. McGill ◽

J. Matthiopoulos ◽

J. G. C. Hopcraft

Keyword(s):

Stable Isotopes ◽

History Of ◽

Tail Hair

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Stable isotopes in jumbo squid (Dosidicus gigas) beaks to estimate its trophic position: comparison between stomach contents and stable isotopes

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315406013324 ◽

2006 ◽

Vol 86 (2) ◽

pp. 437-445 ◽

Cited By ~ 53

Author(s):

R.I. Ruiz-Cooley ◽

Unai Markaida ◽

D. Gendron ◽

S. Aguíñiga

Keyword(s):

Stable Isotopes ◽

Stable Isotope ◽

Trophic Position ◽

Stomach Contents ◽

Isotope Ratios ◽

Trophic Relationships ◽

Dosidicus Gigas ◽

Jumbo Squid ◽

C And N ◽

Biomass Increase

Stomach contents and carbon (C) and nitrogen (N) stable isotope analysis were used to evaluate trophic relationships of jumbo squid, Dosidicus gigas. Buccal masses, beaks and stomach contents of large and medium maturing-sized jumbo squid and muscle from its main prey, the myctophid Benthosema panamense, were collected in the Gulf of California, Mexico during 1996, 1997 and 1999. Both the quantified C and N-isotope ratios in muscle, and stomach content analysis revealed that larger-sized maturing squid showed a higher trophic position than medium-sized individuals. However, a discrepancy between stomach contents versus stable isotope analyses was found in evaluating trophic relationships. Simple dilution models as a function of growth were used to estimate the C and N renewal dietary shift for jumbo squid. Estimates of the initial C and N pools in D. gigas with an initial age of 70 days and 210 days indicated isotopic shifts of 32% after a threefold biomass increase and 25% after a fourfold biomass increase, respectively. Additionally, beak samples of jumbo squid were evaluated as an alternative tissue to estimate squid trophic position using stable isotopes. The results showed a significant correlation between stable isotope ratios from muscle and beak samples. Muscle isotope values were higher than beak by 1% and 4% for δ13C and δ15N respectively. A test with jumbo squid beaks collected from a stomach of a stranded sperm whale confirmed the viability of this method.

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Rule of age and size at maturity: individual variation in the maturation history of resident white‐spotted charr

Journal of Fish Biology ◽

10.1111/j.1095-8649.2002.tb02467.x ◽

2002 ◽

Vol 61 (5) ◽

pp. 1230-1238 ◽

Cited By ~ 43

Author(s):

K. Morita ◽

S. H. Morita

Keyword(s):

Individual Variation ◽

Size At Maturity ◽

History Of

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Application of Isotopic Technology in Aqueous Environment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.356-360.2325 ◽

2011 ◽

Vol 356-360 ◽

pp. 2325-2328

Author(s):

Hai Ying Hu

Keyword(s):

Stable Isotopes ◽

Water Resources ◽

Natural Waters ◽

Driving Forces ◽

Water Environment ◽

Environmental Isotopes ◽

Aqueous Environment ◽

Dynamical Process ◽

History Of ◽

Environment Evolution

The aqueous environment quality plays an important role in controlling the circulation track of ecological environment. Environmental isotopes widely exist in various kinds of water and can be extensively applied in water environment. Isotopes as natural tracers can be used to trace the transportation process of water in hydrologic cycle and the variations of isotopic value can also provide the information about the transference of contamination. The dynamical process of the movement and mix of waters can be studied by applying the composition characteristics of stable isotopes contained in natural waters, thus the main processes of water resources formation and aqueous environment evolution as well as their driving forces mechanism can be revealed. In this paper, the development history of the application of stable isotopes in the water circulation is reviewed, the application theory and analytical method of the environmental stable isotopes, and the new progress of the applied study on water resources formation and aqueous environment evolution are mainly discussed.

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