Publications by authors named "I L Iakovlev"

68 Publications

Seasonal Migrations of (Odonata: Libellulidae) in Middle Asia and Understanding of the Migration Model in the Afro-Asian Region Using Stable Isotopes of Hydrogen.

Insects 2020 Dec 17;11(12). Epub 2020 Dec 17.

A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky pr. 33, 119071 Moscow, Russia.

In Middle Asia, the dragonfly makes regular seasonal migrations. In spring, sexually mature dragonflies (immigrants) arrive in this region for reproduction. Dragonflies of the aboriginal generation (residents) develop in about two months, and migrate south in autumn. Residents of Middle Asia have significantly lower δH values (-123.5 (SD 17.2)‱, n = 53) than immigrants (-64.4 (9.7)‱, n = 12), as well as aboriginal dragonfly species from Ethiopia (-47.9 (10.8)‱, n = 4) and the Sahel zone (-50.1 (15.5)‱, n = 11). Phenological data on in the Afro-Asian region and a comparison with published isotopic data on migratory insects from this region suggest that (i) the probable area of origin of immigrants is located in tropical parts of East Africa and/or the Arabian Peninsula and (ii) the autumn migration of Middle Asian residents to the south may also pass through the Indian Ocean. We assume that in the Afro-Asian region, there is an extensive migration circle of covering East Africa, Central Asia and the Indian subcontinent with a total length of more than 14,000 km.
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http://dx.doi.org/10.3390/insects11120890DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7765977PMC
December 2020

Multiscale structural complexity of natural patterns.

Proc Natl Acad Sci U S A 2020 12 18;117(48):30241-30251. Epub 2020 Nov 18.

Theoretical Physics and Applied Mathematics Department, Ural Federal University, 620002 Yekaterinburg, Russia.

Complexity of patterns is key information for human brain to differ objects of about the same size and shape. Like other innate human senses, the complexity perception cannot be easily quantified. We propose a transparent and universal machine method for estimating structural (effective) complexity of two-dimensional and three-dimensional patterns that can be straightforwardly generalized onto other classes of objects. It is based on multistep renormalization of the pattern of interest and computing the overlap between neighboring renormalized layers. This way, we can define a single number characterizing the structural complexity of an object. We apply this definition to quantify complexity of various magnetic patterns and demonstrate that not only does it reflect the intuitive feeling of what is "complex" and what is "simple" but also, can be used to accurately detect different phase transitions and gain information about dynamics of nonequilibrium systems. When employed for that, the proposed scheme is much simpler and numerically cheaper than the standard methods based on computing correlation functions or using machine learning techniques.
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http://dx.doi.org/10.1073/pnas.2004976117DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7720216PMC
December 2020

Red Wood Ants Display Natural Aversive Learning Differently Depending on Their Task Specialization.

Front Psychol 2019 29;10:710. Epub 2019 Mar 29.

Institute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.

The adaptive benefits of individual specialization and how learning abilities correlate with task performance are still far from being well-understood. Red wood ants are characterized by their huge colonies and deep professional specialization. We hypothesized that red wood ants form aversive learning after having negative encounters with hoverfly larvae differently, depending on their task specialization. We tested this hypothesis, first, by examining whether hunters and aphid milkers learn differently to avoid the nuisance of contacts with syrphid larvae, and, second, by analyzing the difference between learning in "field" and laboratory-reared (naïve) foragers. During the first interaction with the syrphid larva in their lives the naïve foragers showed a significantly higher level of aggressiveness than the members of a natural colony. Naïve foragers applied the "mortal grip," "prolonged bites," and "nibbling" toward the enemy with a significantly higher frequency, whereas members of both "field" groups behaved more carefully and tried to avoid encounters with the larva. The aphid milkers, who had a negative experience of interaction with the larva, being "glued" with its viscous secretion, behaved much less aggressively in the follow-up experiments after 10 min and even 3 days, thus exhibiting the shaping of both short- and long-term memories. However, both "field" hunters and naïve foragers demonstrated no signs of aversive learning. These data provide some new insights into the relationship between task specialization and learning performance in ants. Given our previous results, we speculate that scouts and aphid milkers are the most cognitively gifted specialists in red wood ants, whereas hunters and guards are rather brave than smart.
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http://dx.doi.org/10.3389/fpsyg.2019.00710DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6449629PMC
March 2019

[Analysis of effects of pharmacotherapy on certain parameters of clinical laboratory diagnostics].

Klin Med (Mosk) 2014 ;92(7):41-8

Aim: To study effects of pharmaceutical products on the results of clinical and laboratory diagnostics.

Materials And Methods: The list of vitally important pharmaceuticals, clinico-pharmacological articles of the National registry of medicinal products, formulary articles from the Federal guidelines on the use of pharmaceutical products. Formulary system, instructions for use of individual pharmaceutical products. Systemic and information-based approaches, logical and comparative analysis were used throughout the study.

Results: Results of analysis enabled the authors to draw up separate lists of pharmaceuticals based on their influence on parameters of clinical laboratory diagnostics, such as the list of pharmaceuticals exerting marked effect on diagnostic characteristics (blood properties, primary and coagulative hemostasis, serum enzymes), the list of pharmaceuticals exerting marked effect on systematized laboratory characteristics; the list of pharmaceuticals exerting no effect on clinical and laboratory diagnostics; the list of pharmaceuticals whose effect on diagnostic characteristics awaits clarification.

Conclusion: The results of the study can be used for the development of recommendations on pharmaceutical counseling and rational choice of pharmaceutical products being prescribed to concrete patients.
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April 2015

[Organization of drug assistance for the elderly].

Adv Gerontol 2013 ;26(1):183-9

The basic directions of optimization of drug help to senior citizens from the standpoint of rational use of medicines, taking into account the features of pharmacotherapy in these patients due to age-physiological processes in the body, polymorbidity, reduction of adaptation to the toxic effects of drugs, and the growing incidence of adverse side effects of drugs. The necessity to take into account these characteristics in the clinical trials of drugs, development of guidelines for their use, development standards or medical care, prescription drugs and establish a regime of receiving from therapists and professional counseling pharmacists by elderly patients when they contact the pharmacy organization is shown. The basic directions of organizational and pharmaceutical approaches for the rational use of drugs are discussed, the results of the analysis of information in the instructions for use are shown.
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October 2013
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