Home About Browse Search
Svenska


Habitat selection and indirect interactions in fish communities

mechanisms to explain spatial distribution of perch, roach, and vendace

Beier, Ulrika (2013). Habitat selection and indirect interactions in fish communities. Uppsala : Sveriges lantbruksuniv. , Aqua licentiate theses, UNSPECIFIED ; 2013:2
ISBN 978-91-576-9155-2
eISBN 978-91-576-9156-9
[Licentiate thesis]

[img]
Preview
PDF
852kB

Abstract

To increase the understanding of freshwater lake ecosystems, I have studied the habitat selection of perch (Perca fluviatilis L.), roach (Rutilus rutilus (L.)), and vendace (Coregonus albula (L.)). These fish species use the pelagic and the littoral-benthic habitats in lakes to different extents. Perch and roach are omnivorous, and perch become piscivorous at larger sizes. Vendace is a pelagic species specialized in eating zooplankton. Vendace was expected to affect biotic interactions and habitat use of roach and perch, both directly and indirectly.

I used monitoring data to examine how species distribution patterns, as well as population structures, depended on species composition. In a predation experiment, I studied the relative predation sensitivity as well as evasive behaviours of roach and vendace, with piscivorous perch used as predators. In foraging experiments in aquaria, I studied foraging efficiencies and swimming performances of roach and vendace eating zooplankton in different temperature and light treatments. I then applied metabolic models for roach and vendace, respectively, to compare their net energy gain in different abiotic conditions.

Roach used the pelagic habitat less, and the biomass of roach was lower in lakes with vendace. Results did not support the prediction that perch populations would benefit from the presence of vendace. However, results indicated that a release of competition for small perch may be mediated by vendace, through changed habitat use of roach, increasing the possibilities for predation. Roach and vendace were similar in their sensitivity to predation, indicating that energy gain can explain their habitat use. Foraging efficiencies did not explain the habitat use of roach and vendace in the field. However, the net energy gain in different abiotic conditions, could explain observed patterns of their habitat use in lakes.

This thesis shows how the trade-off between mortality and net energy gain is manifested in habitat use. Including habitat selection in ecological studies may increase our understanding of biotic interactions. Metabolic costs as well as foraging abilities in different abiotic conditions are important for explaining the habitat use of species. Such knowledge can make it possible to forecast how interacting fish species may be affected by environmental change.

Authors/Creators:Beier, Ulrika
Title:Habitat selection and indirect interactions in fish communities
Subtitle:mechanisms to explain spatial distribution of perch, roach, and vendace
Series/Journal:Aqua licentiate theses (BIB14504680)
Year of publishing :29 July 2013
Volume:2013:2
Number of Pages:56
Papers/manuscripts:
NumberReferences
I.Beier, U. (2001). Habitat distribution and size structure in freshwater fish communities: effects of vendace on interactions between perch and roach. Journal of Fish Biology 59(6), 1437–1454.
II.Beier, U. (2013). Winning the loser's game: implications of temperature and light for habitat selection of roach and vendace (submitted manuscript).
Place of Publication:Uppsala
Publisher:Dept. of Aquatic Resources, Swedish University of Agricultural Sciences
Associated Programs and Other Stakeholders:SLU - Environmental assessment > Data from Environmental Assesment (FoMA) is used
ISBN for printed version:978-91-576-9155-2
ISBN for electronic version:978-91-576-9156-9
Language:English
Publication Type:Licentiate thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L50 Animal physiology and biochemistry
M Aquatic sciences and fisheries > M40 Aquatic ecology
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Zoology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 3 Medical and Health Sciences > 301 Basic Medicine > Physiology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Fish and Wildlife Management
Agrovoc terms:perca fluviatilis, perch, rutilus rutilus, roach, coregonus albula, spatial distribution, habitats, predation, population structure, animal competition, foraging
Keywords:active metabolic rate, net energy gain, size-dependent interactions, environment, foraging efficiency, competition, predation
URN:NBN:urn:nbn:se:slu:epsilon-e-1560
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1560
ID Code:10705
Department:(NL, NJ) > Department of Aquatic Resources
External funders:Swedish Agency for Marine and Water Management
Deposited By: Ulrika Beier
Deposited On:30 Jul 2013 05:39
Metadata Last Modified:02 Dec 2014 11:02

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits