scholarly journals Temperature and salinity effects on strontium incorporation in otoliths of larval spot (Leiostomus xanthurus)

2004 ◽  
Vol 61 (1) ◽  
pp. 34-42 ◽  
Author(s):  
Gretchen Bath Martin ◽  
Simon R Thorrold ◽  
Cynthia M Jones
Keyword(s):  
Temperature Dependence ◽  
A Priori ◽  
Marine Species ◽  
Leiostomus Xanthurus ◽  
Coastal Fish ◽  
Geochemical Tracers ◽  
Oxygen Stable Isotopes ◽  
Strontium Incorporation ◽  
Temperature Exposure ◽  
Fish Otoliths

Temperature dependence of strontium/calcium (Sr/Ca) ratios in foraminiferal calcite and coral aragonite is well established; however, factors controlling Sr/Ca ratios in fish otoliths remain obscure. To assess temperature dependence of Sr/Ca in marine fish otoliths, we reared spot (Leiostomus xanthurus) larvae under controlled temperature (17–26 °C) and salinity (15‰ and 25‰). We found a significant linear relationship between temperature and Sr/Ca ratios, with a sensitivity of approximately 5%·°C–1. Otolith Sr/Ca values were also significantly higher at a salinity of 25‰ vs. 15‰, after accounting for differences in dissolved Sr/Ca ratios in the ambient water, with a sensitivity of approximately 1%/salinity (‰). These observations complicate the use of Sr/Ca ratios to determine temperature histories of spot larvae, because accurate temperature reconstructions are possible only with a priori knowledge of both ambient salinity and dissolved Sr/Ca ratios. Fully marine species residing in oceanic waters will not experience significant salinity variations; therefore, otolith Sr/Ca ratios may be useful recorders of temperature exposure. Otolith Sr/Ca thermometry in coastal fish species that make regular excursions into estuarine waters will be more problematic. Multiple geochemical tracers, including oxygen stable isotopes and other trace elements, may be necessary to accurately reconstruct temperature and salinity histories in these species.

Coastal fish otoliths from the early Pleistocene of Rhodes (eastern Mediterranean)

Geobios ◽  
2019 ◽  
Vol 55 ◽  
pp. 1-15 ◽  
Author(s):  
Konstantina Agiadi ◽  
Georgios Vasileiou ◽  
Efterpi Koskeridou ◽  
Pierre Moissette ◽  
Jean-Jacques Cornée
Keyword(s):  
Eastern Mediterranean ◽  
Early Pleistocene ◽  
Coastal Fish ◽  
Fish Otoliths

scholarly journals Mn2+ concentrations in coastal fish otoliths: understanding environmental and biological influences from EPR

2018 ◽  
Vol 44 (3) ◽  
pp. 471-482
Author(s):  
Ana Paula Madeira Di Beneditto ◽  
Roberto Weider de Assis Franco
Keyword(s):  
Coastal Fish ◽  
Fish Otoliths

Collaborative approaches to accessing and utilising historical citizen science data: a case-study with spearfishers from eastern Australia

2015 ◽  
Vol 66 (3) ◽  
pp. 195 ◽  
Author(s):  
Daniel C. Gledhill ◽  
Alistair J. Hobday ◽  
David J. Welch ◽  
Stephen G. Sutton ◽  
Matthew J. Lansdell ◽  
...  
Keyword(s):  
Environmental Change ◽  
Citizen Science ◽  
Marine Species ◽  
Scientific Data ◽  
Science Data ◽  
Coastal Fish ◽  
Eastern Australia ◽  
Fit For Purpose ◽  
The 1960S

Scientists are increasingly utilising non-traditional data to assist with defining biological baselines and for monitoring environmental change. These data present challenges not encountered with traditional, fit-for-purpose scientific data, including engaging with data owners, building trust and maintaining relationships, analysing and interpreting data collected under varying methodologies, and the possibility that data may not suit an intended purpose. Here we describe engagement activities undertaken with recreational spearfishers to collate and examine spearfishing club data collected from competitions held throughout south-eastern Australia from the 1960s until the present, representing one of the most extensive citizen science datasets for marine species in the region. The data proved suitable for demonstrating change in coastal fish communities, some of which were consistent with expectations given a warming climate over the period considered. With an attitudinal survey of divers we also asked about their experience of environmental change, and interaction with management over recent decades. Mutually beneficial outcomes include: collating and archiving significant data that may otherwise have been lost; improved understanding of spearfisher concerns and experiences; improved engagement between collaborators; and recognition of spearfishers’ desire for better engagement in science and management. Lessons learnt may be broadly applicable to improving collaboration between recreational fishers, citizen science groups, researchers and managers.

Calculation of the difference between molar heat capacity of liquid and ideal gas from the temperature dependence of heat of vaporization

1979 ◽  
Vol 44 (6) ◽  
pp. 1687-1697 ◽  
Author(s):  
Vladimír Majer ◽  
Václav Svoboda ◽  
Jiří Pick
Keyword(s):  
Heat Capacity ◽  
Temperature Dependence ◽  
Molar Heat Capacity ◽  
A Priori ◽  
Maximum Error ◽  
Ideal Gas ◽  
Saturated Hydrocarbons ◽  
Heat Of Vaporization ◽  
The Difference ◽  
Experimental Values

A method was developed for calculating the difference ΔcP between molar heat capacity of liquid cP1 and of ideal gas cPgo from the temperature dependence of heat of vaporization. By an a priori analysis the maximum error of the calculation procedure was determined. The exploitation of the method was demonstrated on a group of 20 saturated hydrocarbons. Besides these ΔcP values, the data on cP1 and cPgo were calculated in the regions where no experimental data are available, by combining ΔcP with the experimental values of molar heat capacities.

Full-section otolith microtexture imaged by local-probe X-ray diffraction

2018 ◽  
Vol 51 (4) ◽  
pp. 1182-1196 ◽  
Author(s):  
Phil K. Cook ◽  
Cristian Mocuta ◽  
Élise Dufour ◽  
Marie-Angélique Languille ◽  
Loïc Bertrand
Keyword(s):  
A Priori ◽  
Diffraction Method ◽  
Time Frame ◽  
Climatic Conditions ◽  
Structure Characterization ◽  
Fish Stock ◽  
Stock Management ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fish Otoliths

An optimized synchrotron-based X-ray diffraction method is described for the direct and efficient measurement of crystallite phase and orientation at micrometre resolution across textured polycrystalline samples of millimetre size (high scale dynamics) within a reasonable time frame. The method is demonstrated by application to biomineral fish otoliths. Otoliths are calcium carbonate accretions formed in the inner ears of vertebrates. Fish otoliths are essential biological archives, providing information for individual age estimation, the study of population dynamics and fish stock management, as well as past environmental and climatic conditions from archaeological specimens. Here, X-ray diffraction mapping is discussed as a means of describing the mineralogical structure and microtexture of otoliths. Texture maps could be generated with a fewa priorihypotheses on the aragonitic system. Full-section imaging allows quantitative intercomparison of crystal orientation coupled to microstructural description, across the zones of the otoliths that represent distinctive mineral organization. It reveals the extents of these regions and their internal textural structure. Characterization of structural and textural correlations across whole images is therefore proposed as a complementary approach to investigate and validate the local in-depth nanometre-scale study of biominerals. The estimation of crystallite size and orientational distribution points to diffracting domains intermediate in size between the otolith nanogranules and the crystalline units, in agreement with recently reported results.

An a priori Analysis of Temperature Dependence of Wilson and NRTL Equations

1975 ◽  
Vol 2 (1) ◽  
pp. 51-55 ◽  
Author(s):  
PETR VOŇKA ◽  
JOSEF P. NOVÁK ◽  
JOSEF SUŠKA ◽  
JIŘÍ PICK
Keyword(s):  
Temperature Dependence ◽  
A Priori ◽  
A Priori Analysis ◽  
Wilson And Nrtl Equations

scholarly journals Semi-local extraction of ring structures in images of biological hard tissues: application to the Bayesian interpretation of fish otoliths for age and growth estimation

2006 ◽  
Vol 63 (6) ◽  
pp. 1414-1428 ◽  
Author(s):  
Ronan Fablet
Keyword(s):  
Data Extraction ◽  
A Priori ◽  
Age And Growth ◽  
Growth Data ◽  
Data Set ◽  
Time Frequency ◽  
Ring Structures ◽  
Growth Estimation ◽  
Fish Otoliths ◽  
Selection Of

This paper deals with the analysis of images of biological tissue that involves ring structures, such as tree trunks, bivalve seashells, or fish otoliths, with a view to automating the acquisition of age and growth data. A bottom-up template-based scheme extracts meaningful ridge and valley curve data using growth-adapted time-frequency filtering. Age and growth estimation is then stated as the Bayesian selection of a subset of ring curves, which combines a measure of curve significativity and an a priori statistical growth model. Experiments on real samples demonstrate the efficiency of the proposed data extraction stage. Our Bayesian framework is shown to significantly outperform previous methods for the interpretation of a data set of 200 plaice otoliths and compares favorably with interexpert agreement rates (88% of agreement to expert interpretations).

scholarly journals Considerações acerca da filogenia de Trichoptera Kirby 1813: da análise dos dados para as hipóteses ou dos cenários para os dados

2009 ◽  
Vol 2 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Adolfo Ricardo Calor
Keyword(s):  
Aquatic Insects ◽  
A Priori ◽  
Marine Species ◽  
Conceptual Structure ◽  
Freshwater Ecosystems ◽  
Morphological Data ◽  
Benthic Macroinvertebrate ◽  
Taxon Sampling ◽  
Data Analyses ◽  
The World

Trichoptera compreendem a maior ordem de insetos estritamente aquáticos e constitui a maior proporção da comunidade dos macroinvertebrados bentônicos, com uma fauna mundial em torno de 13.000 espécies descritas para os ecossistemas dulcícolas, além de algumas espécies marinhas da família Chathamiidae, encontradas na Nova Zelândia e Austrália. Nos últimos 40 anos, várias hipóteses da filogenia de Trichoptera têm sido propostas, algumas com amostragens taxonômicas bastante restritas (outras mais completas), algumas com polarização dos caracteres baseada em cenários evolutivos pré-estabelecidos (outras com métodos mais objetivos), algumas apenas com dados morfológicos (outras utilizando dados de diferentes fontes, como morfológicos, moleculares, etológicos) e, por fim, algumas propostas oriundas de análises utilizando máxima parcimônia ou algoritmos bayesianos. O objetivo deste artigo é integrar o conhecimento acerca da filogenia de Trichoptera a fim de construir um panorama elucidativo da atual situação deste táxon e, conseqüentemente, fornecer a estrutura conceitual para o desenvolvimento de trabalhos futuros acerca da filogenia de Trichoptera.   Considerations on phylogeny of Trichoptera Kirby 1813: from data analyses to hypotheses or from scenarios to data Abstract. Trichoptera are the major order among the aquatic insects and constitute a large proportion of benthic macroinvertebrate community. There are about 13000 described species of caddisflies in the world from freshwater ecosystems, and some marine species of Chathamiidae from New Zealand and Australia. In the last 40 years, several different hypotheses of Trichoptera’s phylogeny have been proposed, some analyses with reduced taxon sampling (other analyses with more complete data basis), some analyses with character polarization based in a priori evolutionary scenarios (other with more objective methods), some analyses using only morphological data (other using different data sources as morphology, molecular, ethological data), and some proposals from analyses using maximum parsimony or using Bayesian algorithms. The aim of this paper is integrate the taxonomical knowledge of phylogeny of Trichoptera to building an elucidative landscape and, consequently, to frame the conceptual structure to the development of the future phylogenetic works on Trichoptera systematics.

scholarly journals Carbon and oxygen stable isotopes of freshwater fish otoliths from the São Francisco River, northeastern Brazil

2021 ◽  
Vol 93 (1) ◽  
Author(s):  
NATAN S. PEREIRA ◽  
ALCIDES N. SIAL ◽  
PATRÍCIA B. PINHEIRO ◽  
FABRÍCIO L. FREITAS ◽  
ADRIANA M.C. SILVA
Keyword(s):  
Stable Isotopes ◽  
Freshwater Fish ◽  
Northeastern Brazil ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Oxygen Stable Isotopes ◽  
Fish Otoliths

Temperature Dependence of the Critical Electron Dose for Fatty Acid Monolayers

1982 ◽  
Vol 40 ◽  
pp. 78-79
Author(s):  
Kenneth H. Downing ◽  
Robert M. Glaeser
Keyword(s):  
Electron Beam ◽  
Fatty Acid ◽  
Inelastic Scattering ◽  
Temperature Dependence ◽  
Structural Damage ◽  
Direct Result ◽  
Second Step ◽  
Strong Temperature Dependence ◽  
Electron Dose ◽  
Covalent Bonds

The structural damage of molecules irradiated by electrons is generally considered to occur in two steps. The direct result of inelastic scattering events is the disruption of covalent bonds. Following changes in bond structure, movement of the constituent atoms produces permanent distortions of the molecules. Since at least the second step should show a strong temperature dependence, it was to be expected that cooling a specimen should extend its lifetime in the electron beam. This result has been found in a large number of experiments, but the degree to which cooling the specimen enhances its resistance to radiation damage has been found to vary widely with specimen types.

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