Relationship between gill raker morphology and feeding habits of hybrid bigheaded carps (Hypophthalmichthys spp.)

I. Battonyai, A. Specziár, Z. Vitál, A. Mozsár, J. Görgényi, G. Borics, L. G. Tóth, G. Boros

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Bigheaded carps and especially silver carp have been considered as an effective biological control for algal blooms, thus were introduced to several countries in the last decades, including Hungary. Our aim was to explore the feeding habits of bigheaded carps in Lake Balaton (Hungary), where the stock consists mainly of hybrids (silver carp × bighead carp). We examined the relationship between filtering apparatus (gill raker) morphology and size-distribution of planktonic organisms in the food. We failed to find any significant relationship between gill raker parameters and plankton composition in the filtered material. Bigheaded carps with various types of gill rakers consumed food within the same size-spectrum, independently of the rate of hybridization. However, the linkage between the proportion of different planktonic size classes in the water and in the diet of fish was detectable in case of both phytoplankton and zooplankton consumption, suggesting that the seasonally variable availability of different food items was an important factor in determining the food composition of bigheaded carps. We can deduce that bigheaded carps consume high amounts of zooplankton to meet their energy requirements, and the diet overlap among bigheaded carps and other planktivores may exert negative effects on native fish populations.

Original languageEnglish
Article number36
JournalKnowledge and Management of Aquatic Ecosystems
Issue number416
DOIs
Publication statusPublished - 2015

Fingerprint

Hypophthalmichthys
carp
gills
food
silver
Hypophthalmichthys molitrix
zooplankton
diet
planktivore
Hungary
fish
biological control
Hypophthalmichthys nobilis
plankton
algal bloom
food composition
phytoplankton
energy requirements
algal blooms
food availability

Keywords

  • Bigheaded carp
  • Filter-feeding
  • Food size
  • Gill raker morphology
  • Plankton

ASJC Scopus subject areas

  • Aquatic Science
  • Management, Monitoring, Policy and Law
  • Ecology
  • Nature and Landscape Conservation
  • Water Science and Technology

Cite this

Relationship between gill raker morphology and feeding habits of hybrid bigheaded carps (Hypophthalmichthys spp.). / Battonyai, I.; Specziár, A.; Vitál, Z.; Mozsár, A.; Görgényi, J.; Borics, G.; Tóth, L. G.; Boros, G.

In: Knowledge and Management of Aquatic Ecosystems, No. 416, 36, 2015.

Research output: Contribution to journalArticle

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