English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Dual fuels: intra-annual variation in the relative importance of benthic and pelagic resources to maintenance, growth and reproduction in a generalist salmonid fish

Hayden, B., Harrod, C., & Kahilainen, K. K. (2014). Dual fuels: intra-annual variation in the relative importance of benthic and pelagic resources to maintenance, growth and reproduction in a generalist salmonid fish. Journal of Animal Ecology, 83(6), 1501-1512. doi:10.1111/1365-2656.12233.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-49EF-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-49F0-3
Genre: Journal Article

Files

show Files
hide Files
:
Hayden_2014.pdf (Publisher version), 326KB
 
File Permalink:
-
Name:
Hayden_2014.pdf
Description:
-
Visibility:
Restricted (Max Planck Institute for Evolutionary Biology, Plön; )
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Hayden, Brian, Author
Harrod, Chris1, Author              
Kahilainen, Kimmo K., Author
Affiliations:
1Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445635              

Content

show
hide
Free keywords: benthic macroinvertebrates; C:N ratio; Coregonus lavaretus; d13C; d15N, diet; multiple tissues; subarctic; trophic subsidies; zooplankton
 Abstract: 1. Ecological systems are often characterized as stable entities. However, basal productivity in most ecosystems varies between seasons, particularly in subarctic and polar areas. How this variability affects higher trophic levels or entire food webs remains largely unknown, especially in these high-latitude regions. 2. We undertook a year-long study of benthic (macroinvertebrate) and pelagic (zooplankton) resource availability, along with short (day/days: stomach content)-, medium (month: liver d13C and d15N isotopes)- and long-term (season: muscle d13C and d15N isotopes) assessments of resource use by a generalist fish, the European whitefish, in a deep, oligotrophic, subarctic lake in northern Europe. Due to the long ice-covered winter period, we expected to find general benthic reliance throughout the year, but also a seasonal importance of zooplankton to the diet, somatic growth and gonadal development of whitefish. 3. Benthic and pelagic resource availability varied between seasons: peak littoral benthic macroinvertebrate density occurred in mid-winter, whereas maximum zooplankton density was observed in summer.Whitefish stomach content revealed a reliance on benthic prey items during winter and pelagic prey in summer. A seasonal shift from benthic to pelagic prey was evident in liver isotope ratios, but muscle isotope ratios indicated a year-round reliance on benthic macroinvertebrates. Whitefish activity levels as well as somatic and gonadal growth all peaked during the summer, coinciding with the zooplankton peak and the warmest water temperature. 4. Stable isotopes of muscle consistently depicted the most important resource, benthic macroinvertebrates, whereas short-term indicators, that is, diet and stable isotopes of liver, revealed the seasonal significance of pelagic zooplankton for somatic growth and gonad development. Seasonal variability in resource availability strongly influences consumer growth and reproduction and may also be important in other ecosystems facing pronounced annual weather fluctuations.

Details

show
hide
Language(s): eng - English
 Dates: 2013-08-292014-04-102014-05-152014-11
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1111/1365-2656.12233
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Animal Ecology
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Oxford [etc.] : Blackwell Scientific Publ. [etc.]
Pages: - Volume / Issue: 83 (6) Sequence Number: - Start / End Page: 1501 - 1512 Identifier: ISSN: 0021-8790 (print)
ISSN: 1365-2656 (online)
CoNE: /journals/resource/954925410808