Inter-Tributary Movements by Resident Salmonids across a Boreal Riverscape.
Stream-dwelling fishes inhabit river networks where resources are distributed heterogeneously across space and time. Current theory emphasizes that fishes often perform large-scale movements among habitat patches for reproduction and seeking refugia, but assumes that fish are relatively sedentary du...
Published in: | PLOS ONE |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Public Library of Science (PLoS)
2015
|
Subjects: | |
Online Access: | https://doi.org/10.1371/journal.pone.0136985 https://doaj.org/article/cd1907613b914a02b4e9b1d7791e8696 |
id |
ftdoajarticles:oai:doaj.org/article:cd1907613b914a02b4e9b1d7791e8696 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:cd1907613b914a02b4e9b1d7791e8696 2023-05-15T14:31:24+02:00 Inter-Tributary Movements by Resident Salmonids across a Boreal Riverscape. Kale T Bentley Daniel E Schindler Jonathan B Armstrong Timothy J Cline Gabriel T Brooks 2015-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0136985 https://doaj.org/article/cd1907613b914a02b4e9b1d7791e8696 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC4574770?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0136985 https://doaj.org/article/cd1907613b914a02b4e9b1d7791e8696 PLoS ONE, Vol 10, Iss 9, p e0136985 (2015) Medicine R Science Q article 2015 ftdoajarticles https://doi.org/10.1371/journal.pone.0136985 2022-12-30T21:36:19Z Stream-dwelling fishes inhabit river networks where resources are distributed heterogeneously across space and time. Current theory emphasizes that fishes often perform large-scale movements among habitat patches for reproduction and seeking refugia, but assumes that fish are relatively sedentary during growth phases of their life cycle. Using stationary passive integrated transponder (PIT)-tag antennas and snorkel surveys, we assessed the individual and population level movement patterns of two species of fish across a network of tributaries within the Wood River basin in southwestern Alaska where summer foraging opportunities vary substantially among streams, seasons, and years. Across two years, Arctic grayling (Thymallus arcticus) and rainbow trout (Oncorhynchus mykiss) exhibited kilometer-scale movements among streams during the summer growing season. Although we monitored movements at a small fraction of all tributaries used by grayling and rainbow trout, approximately 50% of individuals moved among two or more streams separated by at least 7 km within a single summer. Movements were concentrated in June and July, and subsided by early August. The decline in movements coincided with spawning by anadromous sockeye salmon, which offer a high-quality resource pulse of food to resident species. Inter-stream movements may represent prospecting behavior as individuals seek out the most profitable foraging opportunities that are patchily distributed across space and time. Our results highlight that large-scale movements may not only be necessary for individuals to fulfill their life-cycle, but also to exploit heterogeneously spaced trophic resources. Therefore, habitat fragmentation and homogenization may have strong, but currently undescribed, ecological effects on the access to critical food resources in stream-dwelling fish populations. Article in Journal/Newspaper Arctic grayling Arctic Thymallus arcticus Alaska Directory of Open Access Journals: DOAJ Articles Arctic Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) Wood River ENVELOPE(-63.157,-63.157,82.502,82.502) PLOS ONE 10 9 e0136985 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Kale T Bentley Daniel E Schindler Jonathan B Armstrong Timothy J Cline Gabriel T Brooks Inter-Tributary Movements by Resident Salmonids across a Boreal Riverscape. |
topic_facet |
Medicine R Science Q |
description |
Stream-dwelling fishes inhabit river networks where resources are distributed heterogeneously across space and time. Current theory emphasizes that fishes often perform large-scale movements among habitat patches for reproduction and seeking refugia, but assumes that fish are relatively sedentary during growth phases of their life cycle. Using stationary passive integrated transponder (PIT)-tag antennas and snorkel surveys, we assessed the individual and population level movement patterns of two species of fish across a network of tributaries within the Wood River basin in southwestern Alaska where summer foraging opportunities vary substantially among streams, seasons, and years. Across two years, Arctic grayling (Thymallus arcticus) and rainbow trout (Oncorhynchus mykiss) exhibited kilometer-scale movements among streams during the summer growing season. Although we monitored movements at a small fraction of all tributaries used by grayling and rainbow trout, approximately 50% of individuals moved among two or more streams separated by at least 7 km within a single summer. Movements were concentrated in June and July, and subsided by early August. The decline in movements coincided with spawning by anadromous sockeye salmon, which offer a high-quality resource pulse of food to resident species. Inter-stream movements may represent prospecting behavior as individuals seek out the most profitable foraging opportunities that are patchily distributed across space and time. Our results highlight that large-scale movements may not only be necessary for individuals to fulfill their life-cycle, but also to exploit heterogeneously spaced trophic resources. Therefore, habitat fragmentation and homogenization may have strong, but currently undescribed, ecological effects on the access to critical food resources in stream-dwelling fish populations. |
format |
Article in Journal/Newspaper |
author |
Kale T Bentley Daniel E Schindler Jonathan B Armstrong Timothy J Cline Gabriel T Brooks |
author_facet |
Kale T Bentley Daniel E Schindler Jonathan B Armstrong Timothy J Cline Gabriel T Brooks |
author_sort |
Kale T Bentley |
title |
Inter-Tributary Movements by Resident Salmonids across a Boreal Riverscape. |
title_short |
Inter-Tributary Movements by Resident Salmonids across a Boreal Riverscape. |
title_full |
Inter-Tributary Movements by Resident Salmonids across a Boreal Riverscape. |
title_fullStr |
Inter-Tributary Movements by Resident Salmonids across a Boreal Riverscape. |
title_full_unstemmed |
Inter-Tributary Movements by Resident Salmonids across a Boreal Riverscape. |
title_sort |
inter-tributary movements by resident salmonids across a boreal riverscape. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2015 |
url |
https://doi.org/10.1371/journal.pone.0136985 https://doaj.org/article/cd1907613b914a02b4e9b1d7791e8696 |
long_lat |
ENVELOPE(-130.143,-130.143,54.160,54.160) ENVELOPE(-63.157,-63.157,82.502,82.502) |
geographic |
Arctic Sockeye Wood River |
geographic_facet |
Arctic Sockeye Wood River |
genre |
Arctic grayling Arctic Thymallus arcticus Alaska |
genre_facet |
Arctic grayling Arctic Thymallus arcticus Alaska |
op_source |
PLoS ONE, Vol 10, Iss 9, p e0136985 (2015) |
op_relation |
http://europepmc.org/articles/PMC4574770?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0136985 https://doaj.org/article/cd1907613b914a02b4e9b1d7791e8696 |
op_doi |
https://doi.org/10.1371/journal.pone.0136985 |
container_title |
PLOS ONE |
container_volume |
10 |
container_issue |
9 |
container_start_page |
e0136985 |
_version_ |
1766305044787888128 |