Coastal Water Mass Replacement: Its Effect on Zooplankton Dynamics and the Predator–Prey Complex Associated with Larval Capelin ( Mallotus villosus )
We examined the hypothesis that the onshore wind-regulated initiation of larval emergence and drift in capelin (Mallotus villosus) was adaptive. Onshore winds were found to induce rapid water mass exchange in coastal Newfoundland resulting in the replacement of cold, high-saline, predator-laden wate...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1982
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Online Access: | http://dx.doi.org/10.1139/f82-134 http://www.nrcresearchpress.com/doi/pdf/10.1139/f82-134 |
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crcansciencepubl:10.1139/f82-134 2024-04-28T08:28:54+00:00 Coastal Water Mass Replacement: Its Effect on Zooplankton Dynamics and the Predator–Prey Complex Associated with Larval Capelin ( Mallotus villosus ) Frank, Kenneth T. Leggett, William C. 1982 http://dx.doi.org/10.1139/f82-134 http://www.nrcresearchpress.com/doi/pdf/10.1139/f82-134 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 39, issue 7, page 991-1003 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1982 crcansciencepubl https://doi.org/10.1139/f82-134 2024-04-09T06:56:30Z We examined the hypothesis that the onshore wind-regulated initiation of larval emergence and drift in capelin (Mallotus villosus) was adaptive. Onshore winds were found to induce rapid water mass exchange in coastal Newfoundland resulting in the replacement of cold, high-saline, predator-laden waters with warmer, less-saline waters in which the abundance of an important fraction of the predator community was reduced 3- to 20-fold and zooplankton densities in the edible size fraction were increased 2- to 3-fold. In situ enclosure experiments indicate that the synchronous emergence of larval capelin during onshore winds, coupled with the reduced predator density at this time, results in predator satiation. Wind-induced elevations of the biomass of the edible zooplankton size fraction can produce fivefold increases in the daily growth rate of larval capelin. Capelin larvae thus initiate their drift and first feeding in a wind-induced "safe site." The abundance of eggs and larvae of 11 other marine fish species were also found to be associated with this "safe site" water mass.Key words: capelin, Mallotus villosus; water mass replacement, predation, feeding, growth, larval fish, survival, wind effects, drift, dispersal, enclosures, zooplankton Article in Journal/Newspaper Newfoundland Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 39 7 991 1003 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Frank, Kenneth T. Leggett, William C. Coastal Water Mass Replacement: Its Effect on Zooplankton Dynamics and the Predator–Prey Complex Associated with Larval Capelin ( Mallotus villosus ) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
We examined the hypothesis that the onshore wind-regulated initiation of larval emergence and drift in capelin (Mallotus villosus) was adaptive. Onshore winds were found to induce rapid water mass exchange in coastal Newfoundland resulting in the replacement of cold, high-saline, predator-laden waters with warmer, less-saline waters in which the abundance of an important fraction of the predator community was reduced 3- to 20-fold and zooplankton densities in the edible size fraction were increased 2- to 3-fold. In situ enclosure experiments indicate that the synchronous emergence of larval capelin during onshore winds, coupled with the reduced predator density at this time, results in predator satiation. Wind-induced elevations of the biomass of the edible zooplankton size fraction can produce fivefold increases in the daily growth rate of larval capelin. Capelin larvae thus initiate their drift and first feeding in a wind-induced "safe site." The abundance of eggs and larvae of 11 other marine fish species were also found to be associated with this "safe site" water mass.Key words: capelin, Mallotus villosus; water mass replacement, predation, feeding, growth, larval fish, survival, wind effects, drift, dispersal, enclosures, zooplankton |
format |
Article in Journal/Newspaper |
author |
Frank, Kenneth T. Leggett, William C. |
author_facet |
Frank, Kenneth T. Leggett, William C. |
author_sort |
Frank, Kenneth T. |
title |
Coastal Water Mass Replacement: Its Effect on Zooplankton Dynamics and the Predator–Prey Complex Associated with Larval Capelin ( Mallotus villosus ) |
title_short |
Coastal Water Mass Replacement: Its Effect on Zooplankton Dynamics and the Predator–Prey Complex Associated with Larval Capelin ( Mallotus villosus ) |
title_full |
Coastal Water Mass Replacement: Its Effect on Zooplankton Dynamics and the Predator–Prey Complex Associated with Larval Capelin ( Mallotus villosus ) |
title_fullStr |
Coastal Water Mass Replacement: Its Effect on Zooplankton Dynamics and the Predator–Prey Complex Associated with Larval Capelin ( Mallotus villosus ) |
title_full_unstemmed |
Coastal Water Mass Replacement: Its Effect on Zooplankton Dynamics and the Predator–Prey Complex Associated with Larval Capelin ( Mallotus villosus ) |
title_sort |
coastal water mass replacement: its effect on zooplankton dynamics and the predator–prey complex associated with larval capelin ( mallotus villosus ) |
publisher |
Canadian Science Publishing |
publishDate |
1982 |
url |
http://dx.doi.org/10.1139/f82-134 http://www.nrcresearchpress.com/doi/pdf/10.1139/f82-134 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 39, issue 7, page 991-1003 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f82-134 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
39 |
container_issue |
7 |
container_start_page |
991 |
op_container_end_page |
1003 |
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1797587284721139712 |