L-BIVARIATE AND L-MULTIVARIATE ASSOCIATION COEFFICIENTS

2008 ◽  
Vol 2008 (2) ◽  
pp. i-30
Author(s):  
Nan Kong ◽  
Charles Lewis
Keyword(s):  
Association Coefficients

scholarly journals Shared Reproductive State Enhances Female Associations in Dolphins

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
Luciana M. Möller ◽  
Robert G. Harcourt
Keyword(s):  
Early Pregnancy ◽  
Bottlenose Dolphins ◽  
Late Pregnancy ◽  
First Year ◽  
Reproductive State ◽  
Predominant Role ◽  
Newborn Period ◽  
Pregnant Females ◽  
Association Coefficients ◽  
Social Clusters

Female bottlenose dolphins (genusTursiops) usually associate at moderate level with other females within social clusters called bands or cliques. It has been suggested that reproductive state may play the predominant role in determining associations within femaleT. truncatusbands. Here, we test the hypothesis that reproductive state correlates with associations of female Indo-Pacific bottlenose dolphins (T. aduncus). We found that females in similar reproductive state, which included females from late pregnancy to the first year of their calves' life or females from early pregnancy to their calves' newborn period, had higher-association coefficients with each other than they did with females in different reproductive states (females with older calves or without calves). This was observed both within and across social clusters suggesting that reproductive state, at least for pregnant females and those with young calves, plays an important role in determining who to associate with. However, a female's most frequent associate was not always with another in similar reproductive state. We suggest that several factors, including reproductive state, may be of importance in determining associations of female bottlenose dolphins.

Sex Differences in Patterns of Association Among Indian Ocean Bottlenose Dolphins

Behaviour ◽  
1992 ◽  
Vol 123 (1-2) ◽  
pp. 38-69 ◽  
Author(s):  
Rachel A. Smolker ◽  
Andrew F. Richards ◽  
Richard C. Connor ◽  
John W. Pepper
Keyword(s):  
Sex Differences ◽  
Bottlenose Dolphins ◽  
Same Sex ◽  
Reproductive State ◽  
Discrete Subgroups ◽  
Party Size ◽  
Shark Bay ◽  
Association Coefficients ◽  
Males And Females

AbstractPatterns of association among bottlenose dolphins resident in Shark Bay, Western Australia were analyzed using party membership data. Parties contained an average of 4.8 individuals, but party size and composition were unstable. While these temporary parties often contained both males and females, long term consistent associations generally were between members of the same sex. The highest association coefficients, resulting from very frequent co-occurrence within parties were between males and between mothers and offspring. Males formed subgroups of two or three individuals who consistently associated with each other, and these were stable over periods of at least seven years in some cases. Male subgroups preferentially associated with particular other male subgroups. Females associated most consistently with other females, although not to the same extent as some males. Female associations were better described as a network rather than discrete subgroups. Male-female associations were generally inconsistent and depended in part on female reproductive state. Mothers and their offspring associated very consistently for at least 4 years.

scholarly journals Phenetic studies on randomly amplified polymorphic DNA-polymerase chain reaction-variability of four geographical populations of Lutzomyia whitmani (Diptera: Psychodidae) in Brazil

2004 ◽  
Vol 37 (2) ◽  
pp. 148-153 ◽  
Author(s):  
Carina Margonari de Souza ◽  
Consuelo Latorre Fortes-Dias ◽  
Pedro Marcos Linardi ◽  
Edelberto Santos Dias
Keyword(s):  
Dna Polymerase ◽  
Randomly Amplified Polymorphic Dna ◽  
Spatial Clusters ◽  
Chain Reaction ◽  
Significant Percentage ◽  
North East ◽  
Geographical Populations ◽  
Association Coefficients ◽  
Polymerase Chain ◽  
High Degree

Previous evaluation of the genetic variability of four biogeographical populations of Lutzomyia whitmani from known foci of cutaneous leishmaniasis in Brazil demonstrated two main spatial clusters: Corte de Pedra-BA, Ilhéus-BA and Serra de Baturité-CE in the first cluster, and Martinho Campos-MG in the second. Further analysis showed a high degree of homogeneity in Corte de Pedra population but not in the others, which presented a significant percentage of specimens displaced from their phenon of origin (discrepant individuals). In the present work we analyzed the frequencies of association coefficients in the matrixes of similarity per population of Lutzomyia whitmani from both sexes and the general phenograms obtained, in a more detailed study of those discrepant specimens. Populational stability was observed for Corte de Pedra population, whereas the three remaining populations showed varying degrees of heterogeneity and different displacements according to sex. Our results strongly suggested the existence of a genetic flow between the lineages North-South/North-East and Ilhéus/Serra do Baturité of Lutzomyia whitmani.

Association coefficients of identity and proportionality for metric scales

Psychometrika ◽  
1989 ◽  
Vol 54 (1) ◽  
pp. 93-104 ◽  
Author(s):  
Robert F. Fagot ◽  
Robert M. Mazo
Keyword(s):  
Association Coefficients

Jackknifing Measures of Association

1981 ◽  
Vol 10 (2) ◽  
pp. 233-240 ◽  
Author(s):  
Neil W. Henry
Keyword(s):  
Asymptotic Theory ◽  
Standard Errors ◽  
Measures Of Association ◽  
Kendall’S Tau ◽  
Kendall's Tau ◽  
Jackknife Method ◽  
Partial Association ◽  
Association Coefficients

Standard errors of estimates of gamma and Kendall's tau-b are estimated using Tukey's jackknife method and the results are compared with Kritzer's application of asymptotic theory. The method is used to test the hypothesis that a pair of partial association coefficients are equal.

scholarly journals Mezőgazdasági társas vállalkozások vizsgálata a KSH Cég-Kód-Tár adatbázisa alapján

2013 ◽  
Vol 8 (1-2) ◽  
pp. 26-32
Author(s):  
György Hampel
Keyword(s):  
Crop Production ◽  
Food Industry ◽  
Limited Liability ◽  
Great Plain ◽  
Capital City ◽  
Annual Income ◽  
Limited Partnership ◽  
Association Coefficients ◽  
Leguminous Crops ◽  
Main Activity

The enterprises which are involved in agriculture as their main activity represent about 1.7 percent of the Hungarian enterprises. Most of the food industry enterprises can be found in the Southern Great Plain Region, the Northern Great Plain and in Central Hungary (including the capital city). The most popular form of operation is the limited liability company (62%) and the limited partnership (25%). Nearly 90% can be considered as micro or small-sized companies, 55 percent has an annual income under 20 million HUF (-70.0006), 83 percent of the companies operate with less than 10 employees. Most of the firms are involved in growing of cereals (except rice), leguminous crops and oil seeds: support activities for crop production; raising of poultry; growing of vegetables and melons, roots and tubers; raising of swin^pigs; growing of pome fruits and stone fruits; raising of dairy cattle and support activities for animal production. By calculating association coefficients, moderate connection was found between the place of headquarter and the form of operation, the main activity. There was a little bit weaker connection detectable between the place of headquarter and the number of employees or the annual income.

scholarly journals АЛЕЛЬНИЙ ПОЛІМОРФІЗМ СИСТЕМИ HLA У ХВОРИХ НА ХРОНІЧНУ МІЄЛОЇДНУ ЛЕЙКЕМІЮ З е13а2 та е14а2 ТРАНСКРИПТАМИ ГЕНА BCR/ABL1

2019 ◽  
Vol 76 (2) ◽  
pp. 53-57
Author(s):  
O. O. Dmytrenko ◽  
I. V. Dmytrenko ◽  
Zh. M. Minchenko ◽  
I. S. Diahil
Keyword(s):  
Fusion Proteins ◽  
Myeloid Leukemia ◽  
Disease Risk ◽  
Molecular Structures ◽  
Allele Frequencies ◽  
Histocompatibility Complex ◽  
Associative Relation ◽  
Increased Risk ◽  
Association Coefficients ◽  
The Individual

To study the associative relation of polymorphic HLA gene variants and BCR/ABL1 transcript types in patients with chronic myeloid leukemia (CML) 87 CML patients were examined. 42 patients had e13a2 BCR/ABL1 transcript and 45 patients had e14a2 BCR/ABL1 transcript. The prevalence of the genes allelic variants of major histocompatibility complex was analyzed and the association coefficients for the disease risk depending on the presence of certain types of BCR/ABL1 transcripts were calculated. Unconditional markers of increased risk of CML (HLA-DRB1*11) and markers of resistance to CML (HLA-A*03) were highlighted. The allele frequencies of HLA-A*03, HLA-A*68, HLA-B*08, HLA-B*15, HLA-B*40, HLA-DRB1*04, DQB1*06 were significantly reduced and allele frequencies of HLA-DRB1*12 and DRB1*11 were increased in patients with the e13a2 transcript compared to healthy people. The allele frequencies of HLA-A*03, HLA-A*11, HLA-B*08, HLA-B*14, HLA-B*40, HLA-DRB1*04 and DQB1* 03 were significantly reduced and the allele frequency of HLA-DRB1*11 was significantly increased in patients with e14a2 transcript compared to healthy persons. Thus, the individual analysis of the complex of fusion proteins e13a2 and e14a2 and HLA alleles in CML patients could indicate the additive effect of both molecular structures joint carrier for CML developing risk.

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