Invasive Ponto-Caspian gobies in the diet of piscivorous fish in a European lowland river

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F17%3A00477821" target="_blank" >RIV/68081766:_____/17:00477821 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/17:00107143

Výsledek na webu

<a href="http://dx.doi.org/10.1127/fal/2017/1024" target="_blank" >http://dx.doi.org/10.1127/fal/2017/1024</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1127/fal/2017/1024" target="_blank" >10.1127/fal/2017/1024</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Invasive Ponto-Caspian gobies in the diet of piscivorous fish in a European lowland river

Popis výsledku v původním jazyce

Between 2012 and 2013, we estimated predation of non-native Ponto-Caspian gobies by native piscivores in a European mid-sized lowland river by analysing 268 digestive tracts from six native species: perch Perca fluviatilis, burbot Lota lota, European catfish Silurus glanis, pike Esox lucius, Volga zander Sander volgensis and European zander S. lucioperca. Species closely associated with the rip-rap bank had a higher proportion of gobies in their diet (burbot 66 % weight proportion [%m], ≥ 1+ perch 53 %m, ≤ 2+ European catfish 42 %m) than those feeding more in open water (pike 29 %m, Volga zander 4 %m) or those limited by gape size (gobiid remains never observed in 0+ perch or 0+ European zander). Young (≤ 2+) European catfish and ≥ 1+ perch showed positive selection for tubenose goby Proterorhinus semilunaris, while burbot and pike showed a preference for round goby Neogobius melanostomus, though the values may have been affected by the relatively low sample sizes. We estimate that predators consumed approximately 52 % of goby biomass over our study stretch each year (burbot 41 %, ≤ 2+ European catfish 5 %, pike 3 %, all other predatory species < 2 % each), confirming that gobies rapidly become an important component in the aquatic food web of invaded rivers, both by preying on aquatic invertebrates and as prey to native predators (particularly burbot). On the other hand, our data suggest that the long-term impact on European goby populations, at least in our study area, has been limited, as indicated by their ongoing spread.

Název v anglickém jazyce

Invasive Ponto-Caspian gobies in the diet of piscivorous fish in a European lowland river

Popis výsledku anglicky

Between 2012 and 2013, we estimated predation of non-native Ponto-Caspian gobies by native piscivores in a European mid-sized lowland river by analysing 268 digestive tracts from six native species: perch Perca fluviatilis, burbot Lota lota, European catfish Silurus glanis, pike Esox lucius, Volga zander Sander volgensis and European zander S. lucioperca. Species closely associated with the rip-rap bank had a higher proportion of gobies in their diet (burbot 66 % weight proportion [%m], ≥ 1+ perch 53 %m, ≤ 2+ European catfish 42 %m) than those feeding more in open water (pike 29 %m, Volga zander 4 %m) or those limited by gape size (gobiid remains never observed in 0+ perch or 0+ European zander). Young (≤ 2+) European catfish and ≥ 1+ perch showed positive selection for tubenose goby Proterorhinus semilunaris, while burbot and pike showed a preference for round goby Neogobius melanostomus, though the values may have been affected by the relatively low sample sizes. We estimate that predators consumed approximately 52 % of goby biomass over our study stretch each year (burbot 41 %, ≤ 2+ European catfish 5 %, pike 3 %, all other predatory species < 2 % each), confirming that gobies rapidly become an important component in the aquatic food web of invaded rivers, both by preying on aquatic invertebrates and as prey to native predators (particularly burbot). On the other hand, our data suggest that the long-term impact on European goby populations, at least in our study area, has been limited, as indicated by their ongoing spread.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10617 - Marine biology, freshwater biology, limnology

Projekt

<a href="/cs/project/GBP505%2F12%2FG112" target="_blank" >GBP505/12/G112: ECIP - Evropské centrum ichtyoparazitologie</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Fundamental and Applied Limnology / Archiv für Hydrobiologie

ISSN

1863-9135

e-ISSN

—

Svazek periodika

190

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

15

Strana od-do

157-171

Kód UT WoS článku

000407540900006

EID výsledku v databázi Scopus

2-s2.0-85021211020