The Use of Coefficient of Difference (CD) in Systematic Zoology and the Subspecies Concept

C. Can BİLGİN

Makale detayları

The Use of Coefficient of Difference (CD) in Systematic Zoology and the Subspecies Concept

Yazarlar:

C. Can BİLGİN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Zoology 1999 Vol.23 Issue EK3, pp.769-774

Belge Tipi:

Makale

Yayın Tarihi:

11/1998

Belge Dili:

Türkçe

Document ID (Org No.):

2000779400

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179

Anahtar kelimeler:

Özet:

 

The use of the Coefficient of Difference (CD), which was first suggested some 50 years ago, as a measure of difference of a single character between two populations is not recommended today on grounds of statisticial weakness, its inability to evaluate more than one character simultaneously, and the often discordant variation of the characters studied. It is useful to utilize the statistically proven t-test or analysis of variance in cases when a few characters are studied, while multivariate distance measures such as Euclidian distance or discriminant function analysis will help determine differences between groups and taxon boundaries when many characters are studied.  According to the latest version of the Biological Species Concept, subspecies are defined on the basis of geographical distribution, concordant characters, and unique diagnosable properties. However, there is no objective criteria that defines the boundaries of the subspecies category. It is questionable that the subspecies concept is operational for the Phylogenetic Species Concept.

 

The use of the Coefficient of Difference (CD), which was first suggested some 50 years ago, as a measure of difference of a single character between two populations is not recommended today on grounds of statisticial weakness, its inability to evaluate more than one character simultaneously, and the often discordant variation of the characters studied. It is useful to utilize the statistically proven t-test or analysis of variance in cases when a few characters are studied, while multivariate distance measures such as Euclidian distance or discriminant function analysis will help determine differences between groups and taxon boundaries when many characters are studied.  According to the latest version of the Biological Species Concept, subspecies are defined on the basis of geographical distribution, concordant characters, and unique diagnosable properties. However, there is no objective criteria that defines the boundaries of the subspecies category. It is questionable that the subspecies concept is operational for the Phylogenetic Species Concept.

Makale detayları

The Use of Coefficient of Difference (CD) in Systematic Zoology and the Subspecies Concept

Yazarlar:

C. Can BİLGİN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Zoology 1999 Vol.23 Issue EK3, pp.769-774

Belge Tipi:

Makale

Yayın Tarihi:

11/1998

Belge Dili:

Türkçe

Document ID (Org No.):

2000779400

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179

Taxonomic methodology

coefficient of difference (CD)

multivariate statistics

subspecies concept

Sayı

Makale detayları

The Use of Coefficient of Difference (CD) in Systematic Zoology and the Subspecies Concept

Yazarlar: C. Can BİLGİN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Zoology 1999 Vol.23 Issue EK3, pp.769-774

Belge Tipi: Makale

Yayın Tarihi: 11/1998

Belge Dili: Türkçe

Document ID (Org No.): 2000779400

Sıklık: İki Aylık

eISSN: 1303-6114

pISSN: 1300-0179

Taxonomic methodology

coefficient of difference (CD)

multivariate statistics

subspecies concept

Sayı

Yazarlar:

C. Can BİLGİN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Zoology 1999 Vol.23 Issue EK3, pp.769-774

Belge Tipi:

Makale

Yayın Tarihi:

11/1998

Belge Dili:

Türkçe

Document ID (Org No.):

2000779400

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179