diet and prey selection of pikeperch (sander lucioperca linnaeus, 1758) population in lake eğirdir (turkey)
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ID: 208353
2014
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Abstract
The diet and prey selection of pikeperch (Sander lucioperca L., 1758) were
assessed by determining the frequency of occurrence, numeric and weight
percentages, and the index of relative importance (IRI%) between January 2010
and December 2010 in Lake Eğirdir, Turkey. Pearre’s index was used to
estimate diet selectivity, while the Schoener Overlap Index was utilized to
compare diets. The stomach contents of 241 S. lucioperca were analyzed.
Pikeperch diet included prey fish, insects and other organisms. The diet was
predominantly fish, consisting of Atherina boyeri, Knipowitschia caucasica,
Aphanius anatoliae, Seminemacheilus ispartensis and Carassius gibelio. A.
boyeri was the most abundant prey fish in the lake; it was a positively
selected food item (V= 0.130, X2= 3.359, p> 0.05) and was not statistically
significant. C. gibelio also inhabits the lake, but was not preferred by
pikeperch (V=0.134, X2= 3.582, p> 0.05). In addition, A. anatoliae (V=-0.223,
X2=9.977, p<0.01) and Chironomus sp., (V= -0.297, X2= 17.665, p<0.01) were
negatively chosen by pikeperch despite their high abundance in the lake.
Stomach fullness was highest in January, while feeding density was lowest in
November and >50 cm in length pikeperch. Cannibalism was not evident during a
decade, due to there being enough food for pikeperch in the lake.
| Reference Key |
m.a.2014archivesdiet
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|---|---|
| Authors | ;Yağci M.A.;Alp A.;Yağci A.;Uysal R. |
| Journal | gastrointestinal endoscopy |
| Year | 2014 |
| DOI |
10.2298/ABS1404515Y
|
| URL | |
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