Prey selectivities of threespine sticklebacks ( Gasterosteus aculeatus) and phantom midge larvae ( Chaoborus spp.) in Newfoundland lakes
SUMMARY. 1. Threespine stickleback ( Gasterosteus aculeatus ) and Chaoborus ( C. punctipennis and C. trivittatus ) planktivore populations were sampled from several oligotrophic lakes on the Avalon Peninsula of Newfoundland, Canada. Pelagic zooplankton communities in these lakes consist of Daphnia c...
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crwiley:10.1111/j.1365-2427.1991.tb00481.x 2024-06-02T08:10:42+00:00 Prey selectivities of threespine sticklebacks ( Gasterosteus aculeatus) and phantom midge larvae ( Chaoborus spp.) in Newfoundland lakes CAMPBELL, CHRISTINE E. 1991 http://dx.doi.org/10.1111/j.1365-2427.1991.tb00481.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2427.1991.tb00481.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2427.1991.tb00481.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Freshwater Biology volume 25, issue 1, page 155-167 ISSN 0046-5070 1365-2427 journal-article 1991 crwiley https://doi.org/10.1111/j.1365-2427.1991.tb00481.x 2024-05-03T12:01:26Z SUMMARY. 1. Threespine stickleback ( Gasterosteus aculeatus ) and Chaoborus ( C. punctipennis and C. trivittatus ) planktivore populations were sampled from several oligotrophic lakes on the Avalon Peninsula of Newfoundland, Canada. Pelagic zooplankton communities in these lakes consist of Daphnia catawba, Holopedium gibberum, Eubosmina longispina, Leptodiaptorma minutus, Epischura nordenskioldi, Cyclops scutifer and rotifers ( Conochilus unicornis, Keratella and Kellicottia spp.). 2. Comparison of gut contents of G. aculeatus and crop contents of later instar Chaoborus larvae with lake zooplankton communities indicated that the vertebrate and invertebrate plank tivores show contrasting species and size selectivities in their choice of zooplankton prey. Prey selectivities were quantified by means of the selectivity index α. 3. G. aculeatus showed positive selectivity for larger zooplankton (greater than 0.76 mm in length), typically the cladoceran D. catawba , while Chaoborus larvae showed positive selectivity for smaller zooplankton (less than 0.50 mm in length), typically the cladoceran E. longispina . While rotifers never featured in the diet of the sticklebacks, these zooplankters were a common component of the chaoborid diet. H. gibberum , with its gelatinous sheath, was rarely found in the gut contents of G. aculeatus and was never found in the crop contents of Chaoborus larvae. 4. Selective predation by these planklivores in the relatively shallow and well‐mixed oligotrophic Avalon lakes may influence species composition and size structure of the pelagic zooplankton communities. Article in Journal/Newspaper Newfoundland Wiley Online Library Canada Freshwater Biology 25 1 155 167 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
SUMMARY. 1. Threespine stickleback ( Gasterosteus aculeatus ) and Chaoborus ( C. punctipennis and C. trivittatus ) planktivore populations were sampled from several oligotrophic lakes on the Avalon Peninsula of Newfoundland, Canada. Pelagic zooplankton communities in these lakes consist of Daphnia catawba, Holopedium gibberum, Eubosmina longispina, Leptodiaptorma minutus, Epischura nordenskioldi, Cyclops scutifer and rotifers ( Conochilus unicornis, Keratella and Kellicottia spp.). 2. Comparison of gut contents of G. aculeatus and crop contents of later instar Chaoborus larvae with lake zooplankton communities indicated that the vertebrate and invertebrate plank tivores show contrasting species and size selectivities in their choice of zooplankton prey. Prey selectivities were quantified by means of the selectivity index α. 3. G. aculeatus showed positive selectivity for larger zooplankton (greater than 0.76 mm in length), typically the cladoceran D. catawba , while Chaoborus larvae showed positive selectivity for smaller zooplankton (less than 0.50 mm in length), typically the cladoceran E. longispina . While rotifers never featured in the diet of the sticklebacks, these zooplankters were a common component of the chaoborid diet. H. gibberum , with its gelatinous sheath, was rarely found in the gut contents of G. aculeatus and was never found in the crop contents of Chaoborus larvae. 4. Selective predation by these planklivores in the relatively shallow and well‐mixed oligotrophic Avalon lakes may influence species composition and size structure of the pelagic zooplankton communities. |
format |
Article in Journal/Newspaper |
author |
CAMPBELL, CHRISTINE E. |
spellingShingle |
CAMPBELL, CHRISTINE E. Prey selectivities of threespine sticklebacks ( Gasterosteus aculeatus) and phantom midge larvae ( Chaoborus spp.) in Newfoundland lakes |
author_facet |
CAMPBELL, CHRISTINE E. |
author_sort |
CAMPBELL, CHRISTINE E. |
title |
Prey selectivities of threespine sticklebacks ( Gasterosteus aculeatus) and phantom midge larvae ( Chaoborus spp.) in Newfoundland lakes |
title_short |
Prey selectivities of threespine sticklebacks ( Gasterosteus aculeatus) and phantom midge larvae ( Chaoborus spp.) in Newfoundland lakes |
title_full |
Prey selectivities of threespine sticklebacks ( Gasterosteus aculeatus) and phantom midge larvae ( Chaoborus spp.) in Newfoundland lakes |
title_fullStr |
Prey selectivities of threespine sticklebacks ( Gasterosteus aculeatus) and phantom midge larvae ( Chaoborus spp.) in Newfoundland lakes |
title_full_unstemmed |
Prey selectivities of threespine sticklebacks ( Gasterosteus aculeatus) and phantom midge larvae ( Chaoborus spp.) in Newfoundland lakes |
title_sort |
prey selectivities of threespine sticklebacks ( gasterosteus aculeatus) and phantom midge larvae ( chaoborus spp.) in newfoundland lakes |
publisher |
Wiley |
publishDate |
1991 |
url |
http://dx.doi.org/10.1111/j.1365-2427.1991.tb00481.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2427.1991.tb00481.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2427.1991.tb00481.x |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Freshwater Biology volume 25, issue 1, page 155-167 ISSN 0046-5070 1365-2427 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2427.1991.tb00481.x |
container_title |
Freshwater Biology |
container_volume |
25 |
container_issue |
1 |
container_start_page |
155 |
op_container_end_page |
167 |
_version_ |
1800756596769292288 |