Littoral spawning habitats of three southern Arctic charr ( Salvelinus alpinus L.) populations
Abstract Arctic charr populations in southern latitudes are nonmigratory, with all life‐stages limited to freshwater lakes and in‐ or out‐flowing tributaries. Although many of these populations are reported to also spawn in lake littorals, little is known about the physical characteristics of putati...
Published in: | Ecology of Freshwater Fish |
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crwiley:10.1111/j.1600-0633.2011.00502.x 2023-12-03T10:15:28+01:00 Littoral spawning habitats of three southern Arctic charr ( Salvelinus alpinus L.) populations Low, Jonathan J. Igoe, Fran Davenport, John Harrison, Simon S. C. 2011 http://dx.doi.org/10.1111/j.1600-0633.2011.00502.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.2011.00502.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.2011.00502.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 20, issue 4, page 537-547 ISSN 0906-6691 1600-0633 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2011 crwiley https://doi.org/10.1111/j.1600-0633.2011.00502.x 2023-11-09T13:53:55Z Abstract Arctic charr populations in southern latitudes are nonmigratory, with all life‐stages limited to freshwater lakes and in‐ or out‐flowing tributaries. Although many of these populations are reported to also spawn in lake littorals, little is known about the physical characteristics of putative spawning grounds. A total of 23 discrete spawning sites within three Irish lakes were located by fyke netting of spawning adults and snorkelling in littoral habitats. Spawning sites were found to be long, narrow strips running parallel to the shore at a maximum depth of 124 cm. Spawning sites were limited to areas of coarse mineral substrate with an adequate ( c. 8 cm) depth of clean interstitial spaces. In individual lakes, combined areas of spawning sites made up 0.4–0.7% of available littoral. Egg densities varied considerably between sites (33–900·eggs m −2 ) and were significantly correlated with gradient and width of spawning sites. No evidence of redd digging was found. The shallow, localised and restricted nature of spawning grounds makes such populations vulnerable to anthropogenically induced postoviposition changes in surface water level, eutrophication processes such as increased lake sedimentation and elevated nutrient status. Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus Wiley Online Library (via Crossref) Arctic Ecology of Freshwater Fish 20 4 537 547 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Low, Jonathan J. Igoe, Fran Davenport, John Harrison, Simon S. C. Littoral spawning habitats of three southern Arctic charr ( Salvelinus alpinus L.) populations |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract Arctic charr populations in southern latitudes are nonmigratory, with all life‐stages limited to freshwater lakes and in‐ or out‐flowing tributaries. Although many of these populations are reported to also spawn in lake littorals, little is known about the physical characteristics of putative spawning grounds. A total of 23 discrete spawning sites within three Irish lakes were located by fyke netting of spawning adults and snorkelling in littoral habitats. Spawning sites were found to be long, narrow strips running parallel to the shore at a maximum depth of 124 cm. Spawning sites were limited to areas of coarse mineral substrate with an adequate ( c. 8 cm) depth of clean interstitial spaces. In individual lakes, combined areas of spawning sites made up 0.4–0.7% of available littoral. Egg densities varied considerably between sites (33–900·eggs m −2 ) and were significantly correlated with gradient and width of spawning sites. No evidence of redd digging was found. The shallow, localised and restricted nature of spawning grounds makes such populations vulnerable to anthropogenically induced postoviposition changes in surface water level, eutrophication processes such as increased lake sedimentation and elevated nutrient status. |
format |
Article in Journal/Newspaper |
author |
Low, Jonathan J. Igoe, Fran Davenport, John Harrison, Simon S. C. |
author_facet |
Low, Jonathan J. Igoe, Fran Davenport, John Harrison, Simon S. C. |
author_sort |
Low, Jonathan J. |
title |
Littoral spawning habitats of three southern Arctic charr ( Salvelinus alpinus L.) populations |
title_short |
Littoral spawning habitats of three southern Arctic charr ( Salvelinus alpinus L.) populations |
title_full |
Littoral spawning habitats of three southern Arctic charr ( Salvelinus alpinus L.) populations |
title_fullStr |
Littoral spawning habitats of three southern Arctic charr ( Salvelinus alpinus L.) populations |
title_full_unstemmed |
Littoral spawning habitats of three southern Arctic charr ( Salvelinus alpinus L.) populations |
title_sort |
littoral spawning habitats of three southern arctic charr ( salvelinus alpinus l.) populations |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1111/j.1600-0633.2011.00502.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.2011.00502.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.2011.00502.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_source |
Ecology of Freshwater Fish volume 20, issue 4, page 537-547 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1600-0633.2011.00502.x |
container_title |
Ecology of Freshwater Fish |
container_volume |
20 |
container_issue |
4 |
container_start_page |
537 |
op_container_end_page |
547 |
_version_ |
1784262377545400320 |