Development of empirical standard weight equation for Pursak chub Squalius pursakensis, an endemic cyprinid species of Northwest Anatolia

Şule SÜLÜN; Sercan BAŞKURT; Özgür EMİROĞLU; Daniela GIANNETTO; Ali Serhan TARKAN

Makale detayları

Development of empirical standard weight equation for Pursak chub Squalius pursakensis, an endemic cyprinid species of Northwest Anatolia

Yazarlar:

Şule SÜLÜN | Sercan BAŞKURT | Özgür EMİROĞLU | Daniela GIANNETTO | Ali Serhan TARKAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Zoology 2014 Vol.38 Issue 5, pp.582-589

Belge Tipi:

Makale

Yayın Tarihi:

4/2014

Belge Dili:

Türkçe

Document ID (Org No.):

2000775470

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179

Anahtar kelimeler:

Özet:

 

Indices of condition enable the evaluation of the well-being of fish, with the assumption that heavier fish of a given length are in a better condition. Relative weight (Wr) is one of these indices; it is calculated by comparing the actual weight of a specimen with the ideal weight of a specimen in good physiological condition of the same length from the same species, i.e. standard weight (Ws). In this research, length and weight data over the distribution range for Pursak chub Squalius pursakensis, an endemic species distributed in the Sakarya and Porsuk drainages in Northwest Anatolia (Turkey), were used to compute a Ws equation by means of the empirical percentile (EmP) method. The Ws equation obtained was log10 Ws = -4.657 + 2.614 log10 TL + 0.127 (log10 TL)2, and the total length range of application was 80-340 mm. Since the EmP Ws equation was not influenced by length variation, the use of this equation to compute the relative weight (Wr) for S. pursakensis throughout its area of distribution is suggested.

 

Indices of condition enable the evaluation of the well-being of fish, with the assumption that heavier fish of a given length are in a better condition. Relative weight (Wr) is one of these indices; it is calculated by comparing the actual weight of a specimen with the ideal weight of a specimen in good physiological condition of the same length from the same species, i.e. standard weight (Ws). In this research, length and weight data over the distribution range for Pursak chub Squalius pursakensis, an endemic species distributed in the Sakarya and Porsuk drainages in Northwest Anatolia (Turkey), were used to compute a Ws equation by means of the empirical percentile (EmP) method. The Ws equation obtained was log10 Ws = -4.657 + 2.614 log10 TL + 0.127 (log10 TL)2, and the total length range of application was 80-340 mm. Since the EmP Ws equation was not influenced by length variation, the use of this equation to compute the relative weight (Wr) for S. pursakensis throughout its area of distribution is suggested.

Makale detayları

Development of empirical standard weight equation for Pursak chub Squalius pursakensis, an endemic cyprinid species of Northwest Anatolia

Yazarlar:

Şule SÜLÜN | Sercan BAŞKURT | Özgür EMİROĞLU | Daniela GIANNETTO | Ali Serhan TARKAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Zoology 2014 Vol.38 Issue 5, pp.582-589

Belge Tipi:

Makale

Yayın Tarihi:

4/2014

Belge Dili:

Türkçe

Document ID (Org No.):

2000775470

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179

Condition indices

endemic species

Squalius

relative weight

Sayı

Makale detayları

Development of empirical standard weight equation for Pursak chub Squalius pursakensis, an endemic cyprinid species of Northwest Anatolia

Yazarlar: Şule SÜLÜN | Sercan BAŞKURT | Özgür EMİROĞLU | Daniela GIANNETTO | Ali Serhan TARKAN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Zoology 2014 Vol.38 Issue 5, pp.582-589

Belge Tipi: Makale

Yayın Tarihi: 4/2014

Belge Dili: Türkçe

Document ID (Org No.): 2000775470

Sıklık: İki Aylık

eISSN: 1303-6114

pISSN: 1300-0179

Condition indices

endemic species

Squalius

relative weight

Sayı

Yazarlar:

Şule SÜLÜN | Sercan BAŞKURT | Özgür EMİROĞLU | Daniela GIANNETTO | Ali Serhan TARKAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Zoology 2014 Vol.38 Issue 5, pp.582-589

Belge Tipi:

Makale

Yayın Tarihi:

4/2014

Belge Dili:

Türkçe

Document ID (Org No.):

2000775470

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179