Endangered aquatic macrophytes in the diet of rudd (Scardinius erythrophthalmus)

To chci

Oxbow lakes are specialised standing water bodies that often support unique macrophyte and animal communities. Between 2015 and 2016, we assessed the diet composition of adult rudd (Scardinius erythrophthalmus) in one such macrophyte-rich lake. Over 2016, we also undertook a series of feeding behaviour tests under artificial conditions, the aim being to assess whether adult rudd represent a threat to the endangered sharp-leaved pondweed (Potamogeton acutifolius). In total, we examined 100 digestive tracts of rudd feeding under natural conditions and 100 from rudd feeding under artificial conditions. Our results show that i) P. acutifolius is deliberately consumed by rudd, and ii) pondweeds, periphyton and invertebrates were the dominant dietary components in the diet. A reluctance to consume cleaned P. acutifolius suggests a link with periphyton and invertebrate consumption. While rudd clearly consume P. acutifolius, we found no evidence of any negative impact on either pondweed development or on the macrophyte community as a whole. … celý popis

Podrobná bibliografie

Hlavní autor

Tomáš Zapletal

Další autoři

Michal Andreas, 1970- , Zdeněk Adámek, 1949- , Jan Špaček, Libor Mikl, Jan Mareš, 1961-

Typ dokumentu

Články

Fyzický popis

Ilustrace

Publikováno v

Folia Zoologica. -- ISSN 0139-7893. -- Roč. 68, č. 1 (2019), s. 1-8

Témata

LAKES

NATURE RESERVES

FRESHWATER FISHES

kaprovití

Scardinius erythrophthalmus

FEEDING PREFERENCES

EXPERIMENTATION

BIOLOGICAL COMPETITION

ENDANGERED SPECIES

AQUATIC PLANTS

POTAMOGETON

PLANT COMMUNITIES

INVERTEBRATES

Impact assessment

AQUATIC ENVIRONMENT

ECOSYSTEMS

jezera

přírodní rezervace

sladkovodní ryby

býložravci

krmné preference

chování živočichů

pokusnictví

biologická konkurence

ohrožené druhy

vodní rostliny

rdest

rostlinná společenstva

bezobratlí

posouzení vlivu

vodní prostředí

ekosystémy

Česko

Přírodní park Orlice (Česko)

stojaté vody > perlín ostrobřichý > makrofyty > rdest ostrolistý > perifyton

Popis jednotky

3 grafy, 1 mapa, 4 tabulky

Bibliografie

Literatura na s. 7-8 (33 záznamů)