<abstract xmlns="http://www.w3.org/1999/xhtml"><p> The aim of the study was to determine the degree of overlap in the feeding niches of early developmental stages of roach, Rutilus rutilus (L.), perch, Perca fluviatilis L., bleak, Alburnus alburnus (L.) and sunbleak, Leucaspius delineatus (Heckel). The hypotheses were that (i) larvae of different fish species of similar body sizes feed on similar food, and that (ii) smaller fish compete with larger ones for similar prey. The results of the analysis was to answer the question of whether the diet overlap of juvenile fish stages decreases with ontogenetic development. The study was conducted for two years (2001-2002) in two shallow, polymictic, eutrophic lakes. The diets of early developmental stages of fish species of similar body sizes differed. The few instances of diet overlap resulted from the abundance of food resources in the environment. However, fish of smaller body sizes exploited the same food resources as did individuals of the same species that belonged to different cohorts.</p></abstract>

The aim of the study was to determine the degree of overlap in the feeding niches of early developmental stages of roach, Rutilus rutilus (L.), perch, Perca fluviatilis L., bleak, Alburnus alburnus (L.) and sunbleak, Leucaspius delineatus (Heckel). The hypotheses were that (i) larvae of different fish species of similar body sizes feed on similar food, and that (ii) smaller fish compete with larger ones for similar prey. The results of the analysis was to answer the question of whether the diet overlap of juvenile fish stages decreases with ontogenetic development. The study was conducted for two years (2001-2002) in two shallow, polymictic, eutrophic lakes. The diets of early developmental stages of fish species of similar body sizes differed. The few instances of diet overlap resulted from the abundance of food resources in the environment. However, fish of smaller body sizes exploited the same food resources as did individuals of the same species that belonged to different cohorts.

Does diet overlap among larval and 0+ fish species decrease with ontogenetic development?

Department of Ichthyology Inland Fisheries Institute in Olsztyn, Poland, ul. Oczapowskiego 10, 10-718 Olsztyn

Fisheries & Aquatic Life

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The aim of the study was to determine the degree of overlap in the feeding niches of early developmental stages of roach, Rutilus rutilus (L.), perch, Perca...

Does diet overlap among larval and 0+ fish species decrease with ontogenetic development?

Published Online: Nov 05, 2014

Page range: 221 - 228

Received: Jul 18, 2014

Accepted: Aug 03, 2014

DOI: https://doi.org/10.2478/aopf-2014-0022

Keywords
diet overlap, juvenile fish, Rutilus rutilus, Perca fluviatilis, Alburnus alburnus, Leucaspius delineatus

© Archives of Polish Fisheries

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Does diet overlap among larval and 0+ fish species decrease with ontogenetic development?

Published Online: Nov 05, 2014

Page range: 221 - 228

Received: Jul 18, 2014

Accepted: Aug 03, 2014

DOI: https://doi.org/10.2478/aopf-2014-0022

Keywordsdiet overlap, juvenile fish, Rutilus rutilus, Perca fluviatilis, Alburnus alburnus, Leucaspius delineatus

© Archives of Polish Fisheries

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
diet overlap, juvenile fish, Rutilus rutilus, Perca fluviatilis, Alburnus alburnus, Leucaspius delineatus