All's good in a famine? Hydrobia ulvaeas a secondary prey for juveniles of Iceland moonsnails Amauropsis islandicaat the White Sea sandflats
Many size-selective predators switch their diet during ontogeny. At the White Sea, the adult moonsnails Amauropsis islandica feed mostly on Macoma balthica clams. The diet of juveniles was largely unknown. We conducted a field survey and a caging experiment to find out if juvenile moonsnails can pre...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Language: | English |
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Cambridge University Press (CUP)
2015
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Online Access: | http://dx.doi.org/10.1017/s0025315415000454 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315415000454 |
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crcambridgeupr:10.1017/s0025315415000454 2024-06-23T07:54:05+00:00 All's good in a famine? Hydrobia ulvaeas a secondary prey for juveniles of Iceland moonsnails Amauropsis islandicaat the White Sea sandflats Aristov, Dmitriy Varfolomeeva, Marina Puzachenko, Georgii 2015 http://dx.doi.org/10.1017/s0025315415000454 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315415000454 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 95, issue 8, page 1601-1606 ISSN 0025-3154 1469-7769 journal-article 2015 crcambridgeupr https://doi.org/10.1017/s0025315415000454 2024-06-12T04:04:58Z Many size-selective predators switch their diet during ontogeny. At the White Sea, the adult moonsnails Amauropsis islandica feed mostly on Macoma balthica clams. The diet of juveniles was largely unknown. We conducted a field survey and a caging experiment to find out if juvenile moonsnails can prey on Hydrobia ulvae , and whether they prefer this snail to their usual prey. Live molluscs and their intact or perforated shells were collected from 34 sediment cores. We exposed the single-prey cages with 50 Macoma (MP) or 50 Hydrobia (HP) together with five Amauropsis juveniles, as well as the cages where both prey species were in a 25:25 proportion (HMP). While live Hydrobia was more abundant in the natural assemblages, Amauropsis preferred Macoma , as indicated by proportions of perforated shells. The caging experiment produced similar results. Per capita Macoma consumption rate was significantly higher than Hydrobia consumption rate (6.4 ± 0.5 mg day −1 ind. −1 vs. 1.4±0.2 mg day −1 ind. −1 in MP and HP respectively). Prey consumption rates in the single-prey treatments were higher than in mixed-prey cages regardless of prey species. Different mechanisms explain this variation: for Hydrobia it is a consequence of the dietary shift, while for Macoma it reflects the ‘floor’ effect in HMP cages, where virtually all Macoma had been drilled by the end of exposure term. While Macoma is the preferable prey of young Amauropsis, Hydrobia can supplement the diet of juveniles when Macoma is scarce in certain locations. Article in Journal/Newspaper Iceland White Sea Cambridge University Press White Sea Journal of the Marine Biological Association of the United Kingdom 95 8 1601 1606 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Many size-selective predators switch their diet during ontogeny. At the White Sea, the adult moonsnails Amauropsis islandica feed mostly on Macoma balthica clams. The diet of juveniles was largely unknown. We conducted a field survey and a caging experiment to find out if juvenile moonsnails can prey on Hydrobia ulvae , and whether they prefer this snail to their usual prey. Live molluscs and their intact or perforated shells were collected from 34 sediment cores. We exposed the single-prey cages with 50 Macoma (MP) or 50 Hydrobia (HP) together with five Amauropsis juveniles, as well as the cages where both prey species were in a 25:25 proportion (HMP). While live Hydrobia was more abundant in the natural assemblages, Amauropsis preferred Macoma , as indicated by proportions of perforated shells. The caging experiment produced similar results. Per capita Macoma consumption rate was significantly higher than Hydrobia consumption rate (6.4 ± 0.5 mg day −1 ind. −1 vs. 1.4±0.2 mg day −1 ind. −1 in MP and HP respectively). Prey consumption rates in the single-prey treatments were higher than in mixed-prey cages regardless of prey species. Different mechanisms explain this variation: for Hydrobia it is a consequence of the dietary shift, while for Macoma it reflects the ‘floor’ effect in HMP cages, where virtually all Macoma had been drilled by the end of exposure term. While Macoma is the preferable prey of young Amauropsis, Hydrobia can supplement the diet of juveniles when Macoma is scarce in certain locations. |
format |
Article in Journal/Newspaper |
author |
Aristov, Dmitriy Varfolomeeva, Marina Puzachenko, Georgii |
spellingShingle |
Aristov, Dmitriy Varfolomeeva, Marina Puzachenko, Georgii All's good in a famine? Hydrobia ulvaeas a secondary prey for juveniles of Iceland moonsnails Amauropsis islandicaat the White Sea sandflats |
author_facet |
Aristov, Dmitriy Varfolomeeva, Marina Puzachenko, Georgii |
author_sort |
Aristov, Dmitriy |
title |
All's good in a famine? Hydrobia ulvaeas a secondary prey for juveniles of Iceland moonsnails Amauropsis islandicaat the White Sea sandflats |
title_short |
All's good in a famine? Hydrobia ulvaeas a secondary prey for juveniles of Iceland moonsnails Amauropsis islandicaat the White Sea sandflats |
title_full |
All's good in a famine? Hydrobia ulvaeas a secondary prey for juveniles of Iceland moonsnails Amauropsis islandicaat the White Sea sandflats |
title_fullStr |
All's good in a famine? Hydrobia ulvaeas a secondary prey for juveniles of Iceland moonsnails Amauropsis islandicaat the White Sea sandflats |
title_full_unstemmed |
All's good in a famine? Hydrobia ulvaeas a secondary prey for juveniles of Iceland moonsnails Amauropsis islandicaat the White Sea sandflats |
title_sort |
all's good in a famine? hydrobia ulvaeas a secondary prey for juveniles of iceland moonsnails amauropsis islandicaat the white sea sandflats |
publisher |
Cambridge University Press (CUP) |
publishDate |
2015 |
url |
http://dx.doi.org/10.1017/s0025315415000454 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315415000454 |
geographic |
White Sea |
geographic_facet |
White Sea |
genre |
Iceland White Sea |
genre_facet |
Iceland White Sea |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 95, issue 8, page 1601-1606 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315415000454 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
95 |
container_issue |
8 |
container_start_page |
1601 |
op_container_end_page |
1606 |
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1802646034996789248 |