Feeding ecology of vimba (Vimba vimba L., 1758) in terms of size groups and seasons in Lake Sapanca, northwestern Anatolia

Hacer Canan OKGERMAN; Cumhur Haldun YARDIMCI

doi:https://doi.org/10.3906/sag-1302-16

Makale detayları

Feeding ecology of vimba (Vimba vimba L., 1758) in terms of size groups and seasons in Lake Sapanca, northwestern Anatolia

Yazarlar:

Hacer Canan OKGERMAN | Cumhur Haldun YARDIMCI

Yayıncı:

TUBITAK

Ana Başlıklar:

Zooloji bilimleri/Hayvanlar

Dergi:

Turkish Journal of Zoology 2013 Vol.37 Issue 3, pp.288-297

Belge Tipi:

Makale

Yayın Tarihi:

2/2013

Belge Dili:

İngilizce

Document ID (Org No.):

2000776016

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179

DOI:

https://doi.org/10.3906/sag-1302-16

Anahtar kelimeler:

Özet:

 

The seasonal changes of diet in the guts of 298 vimbas (Vimba vimba L.) caught on a monthly basis in Lake Sapanca from August 2003 to July 2004 were analyzed. V. vimba fed on ostracods, gastropods, Dreissena polymorpha (mollusks), fish larvae, macrophytes, oligochaetes, chironomids, phytoplankton, and detritus. The gut fullness index (GFI) indicated that vimbas increased their feeding activity in summer and decreased it in winter. The correlation between GFI and temperature was significant (0.839, P < 0.01). The water temperature shift was one of the critical environmental factors affecting the feeding of vimbas in Lake Sapanca. The lowest similarity of diet composition was between the juvenile vimbas in autumn and the adult vimbas in spring (cluster analysis), while the highest similarity of diet composition was between adult individuals in autumn and winter (cluster analysis). In both size groups and in all seasons, the main food items were macrophytes, D. polymorpha, and phytoplankton (particularly bacillariophytes). Of animal food items, adult individuals fed mostly on D. polymorpha, while ostracods were consumed only by juvenile fish in spring, summer, and autumn. The benthic-omnivorous strategy of vimba is demonstrated by the high abundance of plant foods in their guts, confirming this mixed type of diet.

 

The seasonal changes of diet in the guts of 298 vimbas (Vimba vimba L.) caught on a monthly basis in Lake Sapanca from August 2003 to July 2004 were analyzed. V. vimba fed on ostracods, gastropods, Dreissena polymorpha (mollusks), fish larvae, macrophytes, oligochaetes, chironomids, phytoplankton, and detritus. The gut fullness index (GFI) indicated that vimbas increased their feeding activity in summer and decreased it in winter. The correlation between GFI and temperature was significant (0.839, P < 0.01). The water temperature shift was one of the critical environmental factors affecting the feeding of vimbas in Lake Sapanca. The lowest similarity of diet composition was between the juvenile vimbas in autumn and the adult vimbas in spring (cluster analysis), while the highest similarity of diet composition was between adult individuals in autumn and winter (cluster analysis). In both size groups and in all seasons, the main food items were macrophytes, D. polymorpha, and phytoplankton (particularly bacillariophytes). Of animal food items, adult individuals fed mostly on D. polymorpha, while ostracods were consumed only by juvenile fish in spring, summer, and autumn. The benthic-omnivorous strategy of vimba is demonstrated by the high abundance of plant foods in their guts, confirming this mixed type of diet.

Makale detayları

Feeding ecology of vimba (Vimba vimba L., 1758) in terms of size groups and seasons in Lake Sapanca, northwestern Anatolia

Yazarlar:

Hacer Canan OKGERMAN | Cumhur Haldun YARDIMCI

Yayıncı:

TUBITAK

Ana Başlıklar:

Zooloji bilimleri/Hayvanlar

Dergi:

Turkish Journal of Zoology 2013 Vol.37 Issue 3, pp.288-297

Belge Tipi:

Makale

Yayın Tarihi:

2/2013

Belge Dili:

İngilizce

Document ID (Org No.):

2000776016

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179

DOI:

https://doi.org/10.3906/sag-1302-16

Key words: Vimba

Vimba vimba L.

feeding ecology

benthic-omnivorous

Lake Sapanca

Sayı

Makale detayları

Feeding ecology of vimba (Vimba vimba L., 1758) in terms of size groups and seasons in Lake Sapanca, northwestern Anatolia

Yazarlar: Hacer Canan OKGERMAN | Cumhur Haldun YARDIMCI

Yayıncı: TUBITAK

Ana Başlıklar: Zooloji bilimleri/Hayvanlar

Dergi: Turkish Journal of Zoology 2013 Vol.37 Issue 3, pp.288-297

Belge Tipi: Makale

Yayın Tarihi: 2/2013

Belge Dili: İngilizce

Document ID (Org No.): 2000776016

Sıklık: İki Aylık

eISSN: 1303-6114

pISSN: 1300-0179

DOI: https://doi.org/10.3906/sag-1302-16

Key words: Vimba

Vimba vimba L.

feeding ecology

benthic-omnivorous

Lake Sapanca

Sayı

Yazarlar:

Hacer Canan OKGERMAN | Cumhur Haldun YARDIMCI

Yayıncı:

TUBITAK

Ana Başlıklar:

Zooloji bilimleri/Hayvanlar

Dergi:

Turkish Journal of Zoology 2013 Vol.37 Issue 3, pp.288-297

Belge Tipi:

Makale

Yayın Tarihi:

2/2013

Belge Dili:

İngilizce

Document ID (Org No.):

2000776016

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179

DOI:

https://doi.org/10.3906/sag-1302-16