Feeding ecology of invasive Carassius gibelio (Bloch, 1782) in Karamenderes Stream, Turkey

Abstract

üzere üç mevsimde toplam 14 istasyonda yapılan örneklemelerde, serpme, elektroşoker, çeşitli göz açıklığındaki solungaç ağları kullanılarak 251 adet birey yakalanmıştır. Her bireyin çatal boy, ağırlık ve sindirim kanalı uzunluğu ölçülmüş, pullarından yararlanılarak yaş tayinleri yapılmış, sindirim kanalı içerikleri incelenmiştir. Sindirim kanalından çıkan besin organizmaları muhtemel en düşük taksona kadar tanımlanmıştır. Bireylerin beslenme şiddeti, sindirim kanalı içerikleri iki farklı yöntemle değerlendirilmiştir. C. gibelio bireylerinin omnivor olduğu ve çoğunlukla alglerle beslendiği belirlenmiştir. Sindirim kanalı içeriğinde besin çeşitliliği en yüksek yaz mevsiminde Sarımsaklı istasyonunda (2,55) en düşük çeşitlilik de yaz mevsiminde, Kumkale istasyonunda (0,70) görülmüştür. Sindirim kanalından çıkan besin organizmaları arasında Heterokontophyta ve Amphipoda üyelerinin önem indeksleri yüksektir.

Ontogenetic Diet Shift of Invasive Gibel Carp (Carassius gibelio, Bloch 1782) in Karamenderes River (Turkey)

“…C. gibelio has an omnivorous feeding strategy as indicated many studies (Specziár et al 1997;Balık et al 2003;Rybczyk 2006;Kırankaya 2007;Yılmaz et al 2008;Yalçın Özdilek and Jones 2014;Partal and Yalçın Özdilek 2017). The trophic level based on IRI % and RGI data support this finding.…”

“…In addition to having advantages of this species in the interspecific relationship, the high variety of food resources may change during ontogeny and the intraspecific resource partitioning may another advantage of this species in the introduced ecosystems. There are many studies about ecological traits (Lockwood et al 2013;Ekmekçi et al 2013;Tarkan 2013), gut contents (Specziár et al 1997;Rybczyk 2006;Yılmaz et al 2008;Rogozin et al 2011;Partal 2014;Partal and Yalçın Özdilek 2017) and feeding characteristics (Specziár et al 1997;Rybczyk 2006;Yılmaz et al 2008;Rogozin et al 2011;Partal 2014;Yalçın Özdilek and Jones 2014;Partal and Yalçın Özdilek 2017) of this species. C. gibelio has been first recorded in Karamenderes river which is on the Northwestern part of Turkey in 2007 (Yalçın Özdilek 2008).…”

“…C. gibelio has been first recorded in Karamenderes river which is on the Northwestern part of Turkey in 2007 (Yalçın Özdilek 2008). There are some records on the feeding habits of C. gibelio from Karamenderes river (Yalçın Özdilek and Jones 2014;Partal and Yalçın Özdilek 2017), however, there is a gap in the knowledge about ontogenetic diet shift of this species. There is a limited study on the ontogenetic diet shift of C. gibelio and the data on this subject with the ontogenetic niche overlap and trophic position will serve to understand the establishment success of this species.…”

An invasive species, Carassius gibelio, alters the native fish community through trophic niche competition

“…S. cii has a generalist feeding strategy, may outcompete other species under limited resource conditions (Yalçın Özdilek 2017) and is also widespread through the Biga peninsula (Bakaç 2018). C. gibelio is also a generalist feeder and mostly utilises similar food items as S. cii (Partal and Yalçın Özdilek 2017;. It was notable that C. gibelio mostly covered at least 50% of the SEAc of S. cii and the two species compete for some foods.…”

The Introduction of a Marine Species Atherina boyeri into Bayramiç Reservoir, Çanakkale

“…The early records regarding fish species in the Bayramiç Reservoir show that the species that existed in this habitat included Cyprinus carpio, Capoeta tinca, Squalius cephalus and Scardinius erythrophthalmus (Çolakoğlu & Akyurt, 2011). There were several studies in the Karamenderes Stream, where the Bayramiç Reservoir is located (Partal & Yalçın Özdilek, 2017;Yalçın Özdilek & Jones, 2014) but none of them recorded finding specimens of A. boyeri individuals in the Karamenderes river system, including in reservoirs.…”