- MeSH
- Adaptation, Psychological MeSH
- Adult MeSH
- Humans MeSH
- Personality MeSH
- Stress, Psychological MeSH
- Cross-Cultural Comparison MeSH
- Life Change Events MeSH
- Check Tag
- Adult MeSH
- Humans MeSH
- Geographicals
- Czech Republic MeSH
- United States MeSH
In order to disentangle the contribution of host and parasite biology to host specificity, we compared the structure and population dynamics of the Gyrodactylus (von Nordmann, 1832) flatworm community living on sympatric three-spined Gasterosteus aculeatus L. and nine-spined Pungitius pungitius (L.) stickleback. Between April 2002 and March 2003, a small lowland creek was sampled monthly. Species identity of about 75% of the worms per host was determined with a genetic nuclear marker (ITS1). Each stickleback species hosted a characteristic gill- and fin-parasitic Gyrodactylus: G. arcuatus Bychowsky, 1933 and G. gasterostei Gläser, 1974 respectively infecting the three-spined stickleback, with G. rarus Wegener, 1910 and G. pungitii Malmberg, 1964 infecting the nine-spined stickleback. Host size and seasonal dynamics were strong determinants of parasite abundance. A strong interaction between host and parasite species determined infection levels and affected three levels of parasite organisation: community structure, population structure and topographical specialisation. Community and population structure were shaped by asymmetric cross-infections, resulting in a net transmission of the Gyrodactylus species typical of the nine-spined stickleback towards the three-spined stickleback. Host density was not a major determinant of parasite exchange. Aggregation and topographical specialisation of the Gyrodactylus species of the three-spined stickleback were more pronounced than that of the nine-spined stickleback.
- MeSH
- Time Factors MeSH
- Species Specificity MeSH
- Ecosystem MeSH
- Trematode Infections parasitology veterinary MeSH
- Fish Diseases parasitology MeSH
- Sex Characteristics MeSH
- Population Dynamics MeSH
- Seasons MeSH
- Smegmamorpha genetics classification parasitology MeSH
- Trematoda classification parasitology MeSH
- Body Size MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Female MeSH
- Animals MeSH
... One Reason 68 Photo Captions and Credits 120 Editorial Team 120 -- Selected Indicators for Less-Populous ... ... PALACKÉHO V OLOMOUCI -- & 1 -- Sign. 43- 6/ 04y - Knihovna katedry 7 2 / 4/37 -- THE STATE OF WORLD POPULATION ...
State of world population ; Y. 2005
iii, 119 s. : il.
- MeSH
- Altruism MeSH
- Poverty MeSH
- Adolescent Medicine MeSH
- Human Rights MeSH
- Violence MeSH
- Reproductive Health MeSH
- Social Justice MeSH
- Socioeconomic Factors MeSH
- Health Policy MeSH
- Women's Rights MeSH
- Conspectus
- Demografie. Populace
- NML Fields
- demografie
- veřejné zdravotnictví
- sociologie
- demografie
- veřejné zdravotnictví
- sociologie
- NML Publication type
- ročenky
Diagnostika laterality, potažmo rukovosti člověka, je předmětem zájmu mnoha teoreticky i prakticky zaměřených oborů. Jedním z nejpoužívanějších diagnostických nástrojů ve výzkumu laterality je Annettové dotazník rukové preference (Annett, 1970). Cílem této studie bylo ověření latentní struktury tohoto diagnostického prostředku v české populaci. Pomocí strukturálního modelování jsme dospěli k závěru, že Annettové dotazník rukové preference je unidimenzionálním diagnostickým prostředkem. Byly identifikovány čtyři položky (jehla/nit, zametání, lopata, víčko láhve), které nepřispívají dostatečně k měření zamýšleného teoretického konstruktu. Doporučujeme proto, tyto položky při použití AHQ v českém prostředí z dotazníku vyloučit. Po jejich vyloučení je možné vytvářet reliabilní kompozitní skór (McDonaldovo ω = 0,97) jednoduchým součtem výsledků ve zbylých osmi položkách (není nutné přiřazení odlišných vah jednotlivým položkám).
Annett's handedness questionnaire is one of the most frequently used diagnostics tool in laterality research. The aim of this study was to evaluate the latent factor structure of this diagnostic tool.Using the structural equation modeling we conclude that the Annett's handedness questionnaire is a unidimensional instrument. We identified four items in the questionnaire (), which do not contribute adequately to measuring intended theoretical concept. Thus we recommend exclusion of these items when using AHQ in Czech environment. After their removal it is possible to create reliable composite score (McDonald's ω = 0,97) by summing up results in remaining items (weighing of the items is not necessary).
- Keywords
- lateralita, diagnostika, faktorová analýza, teoretický konstrukt,
- MeSH
- Functional Laterality physiology genetics MeSH
- Humans MeSH
- Adolescent MeSH
- Models, Structural MeSH
- Surveys and Questionnaires classification utilization MeSH
- Hand MeSH
- Students MeSH
- Check Tag
- Humans MeSH
- Adolescent MeSH
- Male MeSH
- Female MeSH
