Patterns of Larval Emergence and Their Potential Impact on Stock Differentiation in Beach Spawning Capelin ( Mallotus villosus )
The environmental cues triggering larval capelin (Mallotus villosus) emergence in the St. Lawrence estuary and in coastal Newfoundland are different. In the estuary, emergence from the intertidal and subtidal spawning grounds starts with dusk and ends with dawn, indicating an active response to low...
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Canadian Science Publishing
1987
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Online Access: | http://dx.doi.org/10.1139/f87-157 http://www.nrcresearchpress.com/doi/pdf/10.1139/f87-157 |
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crcansciencepubl:10.1139/f87-157 2023-12-17T10:44:12+01:00 Patterns of Larval Emergence and Their Potential Impact on Stock Differentiation in Beach Spawning Capelin ( Mallotus villosus ) Fortier, Louis Leggett, William C. Gosselin, Serge 1987 http://dx.doi.org/10.1139/f87-157 http://www.nrcresearchpress.com/doi/pdf/10.1139/f87-157 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 44, issue 7, page 1326-1336 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1987 crcansciencepubl https://doi.org/10.1139/f87-157 2023-11-19T13:39:37Z The environmental cues triggering larval capelin (Mallotus villosus) emergence in the St. Lawrence estuary and in coastal Newfoundland are different. In the estuary, emergence from the intertidal and subtidal spawning grounds starts with dusk and ends with dawn, indicating an active response to low light intensity. In the laboratory, emergence from undisturbed sediments collected in the field is perfectly synchronized with the dark phase of the illumination cycle. Nocturnal emergence would represent an adaptation reducing vulnerability to visual predators. Previous work has shown that in Newfoundland, capelin emergence from intertidal beaches is triggered by abrupt changes in water temperature following the sporadic advection to the coast of surface water masses characterized by low predator and high prey abundances. We argue that regional differences in the emergence pattern of the species represent different strategies to avoid predation at the onset of the planktonic drift when the vulnerable yolk sac larvae are densely aggregated. Selection acting on the behaviour of the early larval stages could contribute to stock differentiation in capelin. Article in Journal/Newspaper Newfoundland Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 44 7 1326 1336 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Fortier, Louis Leggett, William C. Gosselin, Serge Patterns of Larval Emergence and Their Potential Impact on Stock Differentiation in Beach Spawning Capelin ( Mallotus villosus ) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
The environmental cues triggering larval capelin (Mallotus villosus) emergence in the St. Lawrence estuary and in coastal Newfoundland are different. In the estuary, emergence from the intertidal and subtidal spawning grounds starts with dusk and ends with dawn, indicating an active response to low light intensity. In the laboratory, emergence from undisturbed sediments collected in the field is perfectly synchronized with the dark phase of the illumination cycle. Nocturnal emergence would represent an adaptation reducing vulnerability to visual predators. Previous work has shown that in Newfoundland, capelin emergence from intertidal beaches is triggered by abrupt changes in water temperature following the sporadic advection to the coast of surface water masses characterized by low predator and high prey abundances. We argue that regional differences in the emergence pattern of the species represent different strategies to avoid predation at the onset of the planktonic drift when the vulnerable yolk sac larvae are densely aggregated. Selection acting on the behaviour of the early larval stages could contribute to stock differentiation in capelin. |
format |
Article in Journal/Newspaper |
author |
Fortier, Louis Leggett, William C. Gosselin, Serge |
author_facet |
Fortier, Louis Leggett, William C. Gosselin, Serge |
author_sort |
Fortier, Louis |
title |
Patterns of Larval Emergence and Their Potential Impact on Stock Differentiation in Beach Spawning Capelin ( Mallotus villosus ) |
title_short |
Patterns of Larval Emergence and Their Potential Impact on Stock Differentiation in Beach Spawning Capelin ( Mallotus villosus ) |
title_full |
Patterns of Larval Emergence and Their Potential Impact on Stock Differentiation in Beach Spawning Capelin ( Mallotus villosus ) |
title_fullStr |
Patterns of Larval Emergence and Their Potential Impact on Stock Differentiation in Beach Spawning Capelin ( Mallotus villosus ) |
title_full_unstemmed |
Patterns of Larval Emergence and Their Potential Impact on Stock Differentiation in Beach Spawning Capelin ( Mallotus villosus ) |
title_sort |
patterns of larval emergence and their potential impact on stock differentiation in beach spawning capelin ( mallotus villosus ) |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/f87-157 http://www.nrcresearchpress.com/doi/pdf/10.1139/f87-157 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 44, issue 7, page 1326-1336 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f87-157 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
44 |
container_issue |
7 |
container_start_page |
1326 |
op_container_end_page |
1336 |
_version_ |
1785561408508788736 |