Brooding
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This article examines the hypothesis that the dialogical integration of life experiences is related to successful aging. Life story interviews with 93 older Czech adults were sorted into categories characterized by specific patterns of life experience integration: (i) without dialogical processes, (ii) with differentiated I-positions, (iii) with dialogical relationships, (iv) partially integrated, and (v) completely integrated. The results indicated that the categories were ordered, yielding low-level correlations with scales of successful aging in predicted directions. A comparison of the categories revealed that they were related to successful aging in a cumulative way, starting with the most essential indicator (lower scores of rumination) in the participants who had developed at least dialogical relationships, continuing to higher well-being linked with partial integration, and ending with an advanced indicator (optimism toward future) linked with complete integration. These relationships were summarized in a hypothetical model that is open to further examination.
- MeSH
- kognitivní ruminace MeSH
- lidé MeSH
- optimismus psychologie MeSH
- rozhovory jako téma MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- vyprávění * MeSH
- zdravé stárnutí * psychologie MeSH
- zdravotní stav MeSH
- životní změny * MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
Vydání první 199 stran ; 23 cm
Příručka, která se zaměřuje na pozitivní myšlení, změnu postoje a zvládání negativních myšlenek a emocí. Určeno široké veřejnosti.; Kniha čtenáře krok za krokem vyvádí ven ze začarovaného kruhu negativních, a někdy až katastrofických myšlenek a učí ho postupně měnit jeho myšlenková schémata.Je založena na kognitivně-behaviorální terapii a prostřednictvím nejrůznějších cvičení pomáhá opustit depresivní a úzkostné myšlenky, zbavit se jejich neustálého omílání a „přežvykování“, ale zejména vede k tomu, aby člověk postupem času objevil i jiná než negativní témata. Kniha obsahuje řadu příkladů z praxe a je plná strukturovaných cvičení, která může čtenář provádět sám nebo pod vedením terapeuta.
- MeSH
- emoce MeSH
- kognitivní ruminace MeSH
- myšlení MeSH
- optimismus MeSH
- pesimismus MeSH
- postoj MeSH
- self-management MeSH
- Publikační typ
- populární práce MeSH
- příručky MeSH
- Konspekt
- Psychologie
- NLK Obory
- psychologie, klinická psychologie
Objectives and hypotheses. It was expected that income and its rate of deterioration as an economic factor, insufficient opportunities to talk to others and subjective feelings of isolation as social variables, and worries about income impairment, worries related to Covid-19, low tolerance of uncertainty, rumination, and catastrophizing as psychological variables, will reduce the frequency of positive experiencing, increase the frequency of negative experiencing and the number of depressive symptoms. On the other hand, personal belief in a just world and a positive reappraisal were expected to positively affect the research variables. Sample and settings. The online data collection was carried out at the end of April 2020 at the peak of the number of people affected by the disease in Slovakia. It was a stratified selection of N = 1108 persons, taking into account the proportional representation of persons from the territory of the whole republic. Statistical analysis. Variable relationships were tested using PLS-SEM (Partial Least Squares – SEM). This procedure was preferred for three reasons: the exploratory nature of complex models, the predictive orientation of models, and the measurement of multiple variables with one-item questioning. Results. Three predictors out of 16 tested had a positive relationship to the frequency of positive experiencing as an affective component of subjective well-being – subjectively assessed health, personal belief in a just world, and a positive reappraisal; rumination was in a negative relationship. Six predictors were related to the frequency of negative experiencing as an affective component of subjective well-being and to symptoms of depression – in addition to the four mentioned above, it was age and worries about income impairment: with higher age, the frequency of negative experiencing and the number of depressive symptoms decreased, and a positive relation had also variables: subjective assessment of health, personal belief in a just world and a positive reappraisal. Worries about income impairment and rumination had a relationship to the frequency of negative experiencing and depressive symptoms. Study limitations. Cross sectional research did not provide information on changes in the affective component of subjective well-being and depressive symptoms of the Slovak population as a result of the pandemic, as the obtained data could not be compared with the results of the same participants from the period before the pandemic. Although this research can be considered representative in several aspects, the validity of the findings is limited by the fact that no specific groups were included in the sample – e.g. the most vulnerable groups were medical staff and the elderly over 70 years of age. Also, those who were ill or suspected of having Covid-19 were excluded from the analysis. Finally, data collection via the Internet presupposes a certain standard of living of respondents.
- MeSH
- COVID-19 * psychologie MeSH
- deprese * psychologie MeSH
- duševní zdraví * MeSH
- kognitivní ruminace MeSH
- kvalita života psychologie MeSH
- lidé MeSH
- pandemie MeSH
- sociální izolace psychologie MeSH
- socioekonomické faktory MeSH
- Check Tag
- lidé MeSH
- Geografické názvy
- Slovenská republika MeSH
Brood parasites are involved in coevolutionary arms races with their hosts, whereby adaptations of one partner elicit the rapid evolution of counter-adaptations in the other partner. Hosts can also mitigate fitness costs of brood parasitism by learning from individual or social experience. In brood parasites, however, the role of learning can be obscured by their stealthy behaviour. Cuckoo catfish (Synodontis multipunctatus) parasitise clutches of mouthbrooding cichlids in Lake Tanganyika and are the only non-avian obligate brood parasites among vertebrates. We experimentally demonstrate that cuckoo catfish greatly enhance their efficiency in parasitising their hosts as they learn to overcome host defences. With increasing experience, cuckoo catfish increased their parasitism success by greater efficiency through improved timing and coordination of intrusions of host spawnings. Hence, within the coevolutionary arms races, brood parasites learn to overcome host defences during their lifetime.
- MeSH
- cichlidy * MeSH
- fyziologická adaptace MeSH
- ptáci MeSH
- sumci * MeSH
- symbióza MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Selection of a particular host has clear consequences for the performance of avian brood parasites. Experimental studies showed that growth rate and fledging mass of brood parasites varied between host species independently of the original host species. Finding correlates of this phenotypic plasticity in growth is important for assessing adaptiveness and potential fitness consequences of host choice. Here, I analyzed the effects of several host characteristics on growth rate and fledging mass of the young of brown-headed cowbird (Molothrus ater), a generalist, non-evicting brood parasite. Cowbird chicks grew better in fast-developing host species and reached higher fledging mass in large hosts with fast postnatal development. A potential proximate mechanism linking fast growth and high fledging mass of cowbird with fast host development is superior food supply in fast-developing foster species. So far, we know very little about the consequences of the great plasticity in cowbird growth for later performance of the adult parasite. Thus, cowbird species could become interesting model systems for investigating the role of plasticity and optimization in the evolution of growth rate in birds.
- MeSH
- biologická evoluce MeSH
- biologické modely MeSH
- paraziti anatomie a histologie růst a vývoj MeSH
- Passeriformes anatomie a histologie růst a vývoj MeSH
- tělesná hmotnost MeSH
- velikost snůšky MeSH
- velikost těla MeSH
- zásobování potravinami MeSH
- zvířata MeSH
- Check Tag
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
The range of hosts exploited by a parasite is determined by several factors, including host availability, infectivity and exploitability. Each of these can be the target of natural selection on both host and parasite, which will determine the local outcome of interactions, and potentially lead to coevolution. However, geographical variation in host use and specificity has rarely been investigated. Maculinea (= Phengaris) butterflies are brood parasites of Myrmica ants that are patchily distributed across the Palæarctic and have been studied extensively in Europe. Here, we review the published records of ant host use by the European Maculinea species, as well as providing new host ant records for more than 100 sites across Europe. This comprehensive survey demonstrates that while all but one of the Myrmica species found on Maculinea sites have been recorded as hosts, the most common is often disproportionately highly exploited. Host sharing and host switching are both relatively common, but there is evidence of specialization at many sites, which varies among Maculinea species. We show that most Maculinea display the features expected for coevolution to occur in a geographic mosaic, which has probably allowed these rare butterflies to persist in Europe. This article is part of the theme issue 'The coevolutionary biology of brood parasitism: from mechanism to pattern'.
- MeSH
- druhová specificita MeSH
- Formicidae parazitologie MeSH
- hnízdění * MeSH
- interakce hostitele a parazita * MeSH
- koevoluce * MeSH
- motýli fyziologie MeSH
- symbióza * MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Evropa MeSH
Recognition is considered a critical basis for discriminatory behaviours in animals. Theoretically, recognition and discrimination of parasitic chicks are not predicted to evolve in hosts of brood parasitic birds that evict nest-mates. Yet, an earlier study showed that host reed warblers (Acrocephalus scirpaceus) of an evicting parasite, the common cuckoo (Cuculus canorus), can avoid the costs of prolonged care for unrelated young by deserting the cuckoo chick before it fledges. Desertion was not based on specific recognition of the parasite because hosts accept any chick cross-fostered into their nests. Thus, the mechanism of this adaptive host response remains enigmatic. Here, I show experimentally that the cue triggering this 'discrimination without recognition' behaviour is the duration of parental care. Neither the intensity of brood care nor the presence of a single-chick in the nest could explain desertions. Hosts responded similarly to foreign chicks, whether heterospecific or experimental conspecifics. The proposed mechanism of discrimination strikingly differs from those found in other parasite-host systems because hosts do not need an internal recognition template of the parasite's appearance to effectively discriminate. Thus, host defences against parasitic chicks may be based upon mechanisms qualitatively different from those operating against parasitic eggs. I also demonstrate that this discriminatory mechanism is non-costly in terms of recognition errors. Comparative data strongly suggest that parasites cannot counter-evolve any adaptation to mitigate effects of this host defence. These findings have crucial implications for the process and end-result of host-parasite arms races and our understanding of the cognitive basis of discriminatory mechanisms in general.
- MeSH
- analýza rozptylu MeSH
- diskriminace (psychologie) fyziologie MeSH
- druhová specificita MeSH
- financování organizované MeSH
- hnízdění fyziologie MeSH
- lidé MeSH
- mateřské chování fyziologie MeSH
- otcovské chování MeSH
- regresní analýza MeSH
- rozpoznávání (psychologie) fyziologie MeSH
- zpěvní ptáci fyziologie MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- srovnávací studie MeSH
Interspecific brood parasitism represents a prime example of the coevolutionary arms race where each party has evolved strategies in response to the other. Here, we investigated whether common cuckoos (Cuculus canorus) actively select nests within a host population to match the egg appearance of a particular host clutch. To achieve this goal, we quantified the degree of egg matching using the avian vision modelling approach. Randomization tests revealed that cuckoo eggs in naturally parasitized nests showed lower chromatic contrast to host eggs than those assigned randomly to other nests with egg-laying date similar to naturally parasitized clutches. Moreover, egg matching in terms of chromaticity was better in naturally parasitized nests than it would be in the nests of the nearest active non-parasitized neighbour. However, there was no indication of matching in achromatic spectral characteristics whatsoever. Thus, our results clearly indicate that cuckoos select certain host nests to increase matching of their own eggs with host clutches, but only in chromatic characteristics. Our results suggest that the ability of cuckoos to actively choose host nests based on the eggshell appearance imposes a strong selection pressure on host egg recognition.
Obligate brood parasites manipulate other species into raising their offspring. Avian and insect brood parasitic systems demonstrate how interacting species engage in reciprocal coevolutionary arms races through behavioral and morphological adaptations and counteradaptations. Mouthbrooding cichlid fishes are renowned for their remarkable evolutionary radiations and complex behaviors. In Lake Tanganyika, mouthbrooding cichlids are exploited by the only obligate nonavian vertebrate brood parasite, the cuckoo catfish Synodontis multipunctatus. We show that coevolutionary history and individual learning both have a major impact on the success of cuckoo catfish parasitism between coevolved sympatric and evolutionarily naïve allopatric cichlid species. The rate of cuckoo catfish parasitism in coevolved Tanganyikan hosts was 3 to 11 times lower than in evolutionarily naïve cichlids. Moreover, using experimental infections, we demonstrate that parasite egg rejection in sympatric hosts was much higher, leading to seven times greater parasite survival in evolutionarily naïve than sympatric hosts. However, a high rejection frequency of parasitic catfish eggs by coevolved sympatric hosts came at a cost of increased rejection of their own eggs. A significant cost of catfish parasitism was universal, except for coevolved sympatric cichlid species with previous experience of catfish parasitism, demonstrating that learning and individual experience both contribute to a successful host response.
- MeSH
- biologická evoluce * MeSH
- cichlidy fyziologie MeSH
- druhová specificita MeSH
- rozmnožování MeSH
- sumci fyziologie MeSH
- symbióza * MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
