Wyniki wyszukiwania

1

Breeding tactics, social structure and genetic variation in mammals: problems and prospects

100%

Van Staaden M. J.

Acta Theriologica. Supplement

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1995

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nr 03

Breeding tactics and social structure are among the primary determinants of the level and distribution of genetic variation in a population, giving rise to genetic structure. However the effects of such behaviors are neither intuitively obvious nor predictive. Interpretations of genetic interactions are hampered by a lack of suitable underlying models and the resulting weak empirical data base means that we are presently unable to answer fundamental questions such as whether the social structure exhibited by a species has any necessary or consistent relationship with the extent of genetic population structure in the species. In this review I present a brief overview of recent theoretical models, and summarise results of the two most common empirical approaches; namely, genetic comparison of identified social groups, and studies of arbitrarily selected samples. Some recommendations are made with respect to future empirical investigations. Increased sophistication in classifying social complexity will be necessary to elucidate the effects of social structure and breeding tactics on partitioning of genetic variation, and to determine the true correlation between social level and genetic structure.

2

Elements of social and spatial organization of wild boar populations

84%

Jezierski W.

Forestry

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2002

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tom 05

3

Seasonal changes in social behaviour and spatial structure of Crocidura leucodon in North-Western Bulgaria

84%

Simeonovska-Nikolova D. M.

Acta Theriologica

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2004

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tom 49

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nr 2

The patterns of social behaviour and spatial structure of Crocidura leucodon (Hermann, 1780) were studied against the background of the seasonal changes in its density and demographic features. Field and lab research were conducted. Field investigations (with CMR method) were conducted from 1997 to 1999 in north-western Bulgaria, in a grassland with patches of tree-shrub vegetation. In the lab, the social interactions were studied in male-male, female-female and male-female dyadic encounters during summer and autumn. A total of 26 shrews were tested. The number of C. leucodon was lowest in spring and greatest in autumn. In early summer the sex ratio was balanced, the home range of one male overlapped that of one female, and aggressiveness and marking activity was increased. So, it can be assumed that in this period males and females form pairs, which possess defended territories. Higher aggressiveness and marking activity displayed by males suggest their greater role in defending the territories. In autumn the home ranges overlapped greatly and amicable interactions prevailed over agonistic ones probably due to shifting to a gregarious way of life. So, the patterns of spatial structure and social behaviour undergo the seasonal changes in C. leucodon life-cycle and its density dynamics.

4

Parental attitudes and social competence in adolescents

67%

Drozdz E., Pokorski M.

Journal of Physiology and Pharmacology. Supplement

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2007

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tom 58

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nr 5

5

Abundance, population structure and seasonally changing social organization of argali Ovis ammon karelini in West-Central Tian-Shan of Kyrgyzstan

67%

Klich D., Magomedov M. R.

Acta Theriologica

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2010

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tom 55

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nr 1

27-34

The main aim of this study was to determine the numbers, population structure and seasonal changes in group structure of argali Ovis ammon karelini Severtzov, 1873 in the Tian-Shan of Kyrgyzstan. The study was carried out within two adjoining areas: the Baralbas River region, and the Ak-Tash River region. Data were collected during three seasons: winter, spring and summer. This population consisted of 42.3% females, 22.2% males, 13.4% yearlings, and 22.1% lambs. Composition and numbers of groups were seasonally changing. Argali occurred predominantly in mixed groups during winter and exclusively in separated groups during summer. The maximum group size decreased from 25% from winter to spring, however, increased during summer.

6

Morphometric characteristics of Formica polyctena Foerst. and Formica rufa L. [Hymenoptera, Formicidae] from the Gorce Mts; Interspecific and intraspecific variations

67%

Czechowski W., Douwes P.

Annales Zoologici

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1996-1997

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tom 46

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nr 1-2

The ants Formica polyctena Foerst., F. rufa L., hybrids F. rufa × F. polyctena, and F. pratensis Retz, from the Gorce Mts (the Western Carpathians; southern Poland) were characterized biometrically. Six morphological characters (pigmentation, size, pilosity) of workers were studied. Principal component analysis and cluster analysis were made for the data of 50 samples from wood ant colonies with different social organization and from various habitats (mainly F. polyctena and F. rufa spatially intermingling populations). The results are discussed in the context of taxonomic difficulties within the F. rufa group.

7

Prehistoryczni pasterze

59%

Kobusiewicz M., Schild R.

Academia. Magazyn Polskiej Akademii Nauk

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2005

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nr 3

20-24

8

Auditor i menedżer systemu społecznej odpowiedzialności organizacji

59%

Henrykowski W., Kalinowska M.

ABC Jakości

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2013

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nr 3-4

Ograniczanie wyników

2 Acta Theriologica

1 ABC Jakości

1 Academia. Magazyn Polskiej Akademii Nauk

1 Acta Theriologica. Supplement

1 Annales Zoologici

1 Forestry

1 Journal of Physiology and Pharmacology. Supplement

1 Czechowski W.

1 Douwes P.

1 Drozdz E.

1 Henrykowski W.

1 Jezierski W.

1 Kalinowska M.

1 Klich D.

1 Kobusiewicz M.

1 Magomedov M. R.

1 Pokorski M.

1 Schild R.

1 Simeonovska-Nikolova D. M.

1 Van Staaden M. J.

1 2013

1 2010

1 2007

1 2005

1 2004

1 2002

1 1997

1 1995