Sagittal otoliths are normally deposited as the CaCO
3
polymorph aragonite; however, a proportion of otoliths transitions to vaterite during growth. This transition can complicate otolith chemistry ...analyses, as differences in the crystalline structure (aragonite or vaterite) of otoliths causes variation in otolith chemistry signatures. To address this issue, we introduce a method to utilize sagittal otoliths partially composed of vaterite for stock discrimination. Using this method, we determined the hatchery origins of yearlings from five Lake Erie hatcheries by using Ba, Mg, Mn, and Sr concentrations in vaterite sections of steelhead (Oncorhynchus mykiss) otoliths. We then compared the classification accuracy of our vaterite method with a method in which otoliths composed entirely of aragonite were used. Overall, quadratic discriminant function analyses revealed similar classification success when elemental concentrations from vaterite (95% accuracy) and aragonite (94% accuracy) otolith regions were used. The methods introduced here could likely be used for other fish species that have otoliths that transition to vaterite as long as an adequate number of juvenile fish are available to develop vaterite otolith chemistry signatures.
Objective
: tokenization of creativity, alongside with cryptoeconomy and Web3 network infrastructure, is a notable trend in the development of modern society in the third decade of the 21st century. ...The objective of this article is to explore the risks and prospects emerging in the process of disposition of the creative labor results in the form of non-fungible tokens.
Methods
: the research methodology is based on analysis of varied viewpoints on the problem, including diametrically opposing concepts. The opposing views of the observers manifest their attitude to tokenization of creative products as a speculative scheme, on the one hand, and a promising tool of creative industries development, on the other.
Results
: the probable negative consequences of tokenization of intellectual activity results are identified; author’s recommendations on managing these risks are given. Another result of this publication is analysis of economiclegal prospects stemming from tokenization of the objects of copyright and neighboring rights by the example of musical pieces.
Scientific novelty
: it consists in presenting and substantiating a hypothesis that the relations formed in the musical industry under the modern sociocultural and technological realities will be reproduced in other creative industries. Also, scientific novelty consists in the analysis of prospects of tokenization of such results of intellectual activity as gaming artifacts, works of traditional and digital visual arts, patents and scientific achievements. The use of nonfungible tokens the ecosystem of network computer games will allow gamers to buy and sell rights to game pieces autonomously from game publishers. Tokenization of industrial property objects and individualization means will ensure protection of intellectual rights of their authors while waiting for the issuance of a state protection document. In the modern society, there will be many of those wishing to become an owner of a token for a scientific work, as the popularity of science and innovations is constantly growing in developed countries. Ownership of a token for a scientific work will be regarded a moral investment, increasing the prestige and status of its owner. Tokens for scientific works have a high potential as a means of measuring value in a post-economic society.
Practical significance
: it consists in the description of innovative means of using creative products and business models based on tokenization of the results of intellectual activity, ready to be implemented in practice.
Zooplankton play a key role in aquatic ecosystems, providing potential top-down control on phytoplankton and linking primary production to higher trophic levels. Thus, knowledge of zooplankton ...dynamics is fundamental to any assessment of the impacts of human driven rapid environmental change on lakes. Lake Erie has undergone eutrophication since the 1990s, resulting in summer harmful cyanobacterial blooms, dominated by Microcystis aeruginosa, since approximately 2003 in the western basin (WB) and 2008 in the central basin (CB). The effect of eutrophication on zooplankton in Lake Erie is unclear; few studies have characterized trends in zooplankton biomass and community structure during this period of rapid change. We used the Lake Erie Plankton Abundance Study (LEPAS) zooplankton dataset to analyze interannual trends in the dynamics of eight major zooplankton groups in the WB and CB during 1995–2020. In both basins, we found directional change in zooplankton biomass and community structure. These directional trends in zooplankton biomass overlaid approximate five-year cycles in nearly all taxa, potentially linked to the El Niño Southern Oscillation. Eutrophication was associated with an increase in the summer biomass of total zooplankton, calanoids, and large cladocerans but surprisingly, not cyclopoids, rotifers or small cladocerans. The surprisingly positive or neutral effect of eutrophication and M. aeruginosa on zooplankton biomass may be due to a combination of bottom-up (e.g. concurrent increases in more edible algae) and top-down (e.g. changes in planktivory) forces.
CsI-THGEM gaseous photomultipliers for RICH and noble-liquid detectors Breskin, A.; Peskov, V.; Cortesi, M. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
05/2011, Volume:
639, Issue:
1
Journal Article
Peer reviewed
The properties of UV-photon imaging detectors consisting of CsI-coated THGEM electron multipliers are summarized. New results related to detection of Cherenkov light (RICH) and scintillation photons ...in noble-liquid are presented.
Understanding and predicting recruitment, longstanding goals in fisheries science and ecology, are complicated by variation in the importance of environmental drivers coupled with the dynamic nature ...of individual ecosystems. Developing an understanding of recruitment from well‐monitored stocks offers an opportunity to overcome these complexities. We used a systematic literature review, a survey, and a workshop attended by professionals with expertise in recruitment of Walleye Sander vitreus to identify common environmental drivers of Walleye recruitment and additional sources of variation (i.e., context dependencies) among populations. The importance of individual environmental drivers, as well as the direction of their influence, differed as a function of geographic region, lake surface area, and Walleye life stage. The literature suggested abiotic conditions (e.g., temperature) during the first year of life were influential in determining recruitment. Professional opinion noted the importance of biotic factors, with prey availability and predation risk having the most consistent relationships with recruitment. We synthesized this information to propose a conceptual model that illustrates the suite of characteristics that shape Walleye recruitment over large spatial and temporal scales. Our findings emphasize the importance of first‐year growth and system‐specific contextual factors, which can alter the relative importance of the environmental drivers of recruitment.
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