Dual fuels: intra‐annual variation in the relative importance of benthic and pelagic resources to maintenance, growth and reproduction in a generalist salmonid fish
Summary 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...
Published in: | Journal of Animal Ecology |
---|---|
Main Authors: | , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2014
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/1365-2656.12233 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2656.12233 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.12233 |
id |
crwiley:10.1111/1365-2656.12233 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/1365-2656.12233 2024-06-23T07:57:02+00:00 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, Brian Harrod, Chris Kahilainen, Kimmo K. Rasmussen, Joseph Fisheries Society of the British Isles Academy of Finland 2014 http://dx.doi.org/10.1111/1365-2656.12233 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2656.12233 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.12233 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Animal Ecology volume 83, issue 6, page 1501-1512 ISSN 0021-8790 1365-2656 journal-article 2014 crwiley https://doi.org/10.1111/1365-2656.12233 2024-06-06T04:21:59Z Summary 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. We undertook a year‐long study of benthic (macroinvertebrate) and pelagic (zooplankton) resource availability, along with short (day/days: stomach content)‐, medium (month: liver δ 13 C and δ 15 N isotopes)‐ and long‐term (season: muscle δ 13 C and δ 15 N isotopes) assessments of resource use by a generalist fish, the E uropean whitefish, in a deep, oligotrophic, subarctic lake in northern E urope. 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. 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. 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 ... Article in Journal/Newspaper Subarctic Wiley Online Library Journal of Animal Ecology 83 6 1501 1512 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Summary 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. We undertook a year‐long study of benthic (macroinvertebrate) and pelagic (zooplankton) resource availability, along with short (day/days: stomach content)‐, medium (month: liver δ 13 C and δ 15 N isotopes)‐ and long‐term (season: muscle δ 13 C and δ 15 N isotopes) assessments of resource use by a generalist fish, the E uropean whitefish, in a deep, oligotrophic, subarctic lake in northern E urope. 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. 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. 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 ... |
author2 |
Rasmussen, Joseph Fisheries Society of the British Isles Academy of Finland |
format |
Article in Journal/Newspaper |
author |
Hayden, Brian Harrod, Chris Kahilainen, Kimmo K. |
spellingShingle |
Hayden, Brian Harrod, Chris Kahilainen, Kimmo K. Dual fuels: intra‐annual variation in the relative importance of benthic and pelagic resources to maintenance, growth and reproduction in a generalist salmonid fish |
author_facet |
Hayden, Brian Harrod, Chris Kahilainen, Kimmo K. |
author_sort |
Hayden, Brian |
title |
Dual fuels: intra‐annual variation in the relative importance of benthic and pelagic resources to maintenance, growth and reproduction in a generalist salmonid fish |
title_short |
Dual fuels: intra‐annual variation in the relative importance of benthic and pelagic resources to maintenance, growth and reproduction in a generalist salmonid fish |
title_full |
Dual fuels: intra‐annual variation in the relative importance of benthic and pelagic resources to maintenance, growth and reproduction in a generalist salmonid fish |
title_fullStr |
Dual fuels: intra‐annual variation in the relative importance of benthic and pelagic resources to maintenance, growth and reproduction in a generalist salmonid fish |
title_full_unstemmed |
Dual fuels: intra‐annual variation in the relative importance of benthic and pelagic resources to maintenance, growth and reproduction in a generalist salmonid fish |
title_sort |
dual fuels: intra‐annual variation in the relative importance of benthic and pelagic resources to maintenance, growth and reproduction in a generalist salmonid fish |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1111/1365-2656.12233 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2656.12233 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.12233 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Journal of Animal Ecology volume 83, issue 6, page 1501-1512 ISSN 0021-8790 1365-2656 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/1365-2656.12233 |
container_title |
Journal of Animal Ecology |
container_volume |
83 |
container_issue |
6 |
container_start_page |
1501 |
op_container_end_page |
1512 |
_version_ |
1802650469633359872 |