Carp feeding activity and habitat utilisation in relation to supplementary feeding in a semi-intensive aquaculture pond

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F16%3A00462470" target="_blank" >RIV/68081766:_____/16:00462470 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s10499-016-0061-6" target="_blank" >http://dx.doi.org/10.1007/s10499-016-0061-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10499-016-0061-6" target="_blank" >10.1007/s10499-016-0061-6</a>

Result language

angličtina

Original language name

Carp feeding activity and habitat utilisation in relation to supplementary feeding in a semi-intensive aquaculture pond

Original language description

A combination of radio telemetry and electrofishing was used to assess seasonalnfeeding activity and habitat utilisation of common carp (Cyprinus carpio) in a large (130 ha) semi-intensive aquaculture pond receiving supplementary feed. While telemetry indicated no difference in fish habitat utilisation by size, age or sample year, all fish showed a strong preference for the supplementary feed area (SFA) during the feeding period, electrofishing indicating a 159 higher fish concentration. Despite this, not all of the feed provided was eaten immediately. Carp activity was more evenly spread over the pond in summer/autumn and more concentrated at the SFA in spring. There was a significant shift to deeper waters in winter. Diet analysis indicated a high preponderance of cereal in SFA fish, with natural food (mainly zooplankton) dominant at natural feeding areas. The proportion of "emergency" food (e.g. detritus) was similar in both areas, as was the index of gut fullness. Our results confirm that concentrated and repeated supplementary feeding in one area results in aggregation of carp, potentially leading to uneven population growth and flesh quality and reduced water quality from turbidity and increased nutrient input. As an alternative, we suggest spreading less supplemental feed over a greater area at wider time intervals. This would ensure (a) full utilisation of feed, reducing costs and increasing water quality, and (b) more homogenous fish distribution, ensuring more efficient use of natural food, reduced turbidity, more homogenous size/weight distribution and improved product quality.

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EG - Zoology

OECD FORD branch

—

Project

<a href="/en/project/GBP505%2F12%2FG112" target="_blank" >GBP505/12/G112: ECIP - European Centre of Ichtyoparasitology</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

Aquaculture International

ISSN

0967-6120

e-ISSN

—

Volume of the periodical

24

Issue of the periodical within the volume

6

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

14

Pages from-to

1627-1640

UT code for WoS article

000389609200008

EID of the result in the Scopus database

2-s2.0-84986276598