Occurrence of Two-Year Cyclicity, “Saw-Blade Fluctuation”, in Vendace Populations in Finland
The tendency towards two-year cyclicity is considered typical of many Fennoscandian vendace populations, especially in fluctuation of recruitment, based on time series of individual lakes. We used two robust indicators to identify and quantify two-year cycles in vendace population proxy time series...
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Finnish Zoological and Botanical Publishing Board
2021
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ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/78075 2024-05-19T07:40:12+00:00 Occurrence of Two-Year Cyclicity, “Saw-Blade Fluctuation”, in Vendace Populations in Finland Marjomäki, Timo J. Auvinen, Heikki Helminen, Harri Huusko, Ari Huuskonen, Hannu Hyvärinen, Pekka Jurvelius, Juha Sarvala, Jouko Valkeajärvi, Pentti Viljanen, Markku Karjalainen, Juha 2021 application/pdf 215–229 fulltext http://urn.fi/URN:NBN:fi:jyu-202110115111 eng eng Finnish Zoological and Botanical Publishing Board Annales Zoologici Fennici 0003-455X 4-6 58 10.5735/086.058.0408 Marjomäki, T. J., Auvinen, H., Helminen, H., Huusko, A., Huuskonen, H., Hyvärinen, P., Jurvelius, J., Sarvala, J., Valkeajärvi, P., Viljanen, M., & Karjalainen, J. (2021). Occurrence of Two-Year Cyclicity, “Saw-Blade Fluctuation”, in Vendace Populations in Finland. Annales Zoologici Fennici , 58 (4-6), 215-229. https://doi.org/10.5735/086.058.0408 CONVID_101389085 URN:NBN:fi:jyu-202110115111 http://urn.fi/URN:NBN:fi:jyu-202110115111 In Copyright © Finnish Zoological and Botanical Publishing Board openAccess http://rightsstatements.org/page/InC/1.0/?language=en kalakannat populaatiodynamiikka muikku kannanvaihtelut article http://purl.org/eprint/type/JournalArticle http://purl.org/coar/resource_type/c_2df8fbb1 publishedVersion A1 2021 ftjyvaeskylaenun 2024-04-23T23:38:28Z The tendency towards two-year cyclicity is considered typical of many Fennoscandian vendace populations, especially in fluctuation of recruitment, based on time series of individual lakes. We used two robust indicators to identify and quantify two-year cycles in vendace population proxy time series at different life-stages — spawning stock biomass (SB), density of newly hatched larvae (LD) and recruitment (REC) — from 22 Finnish lakes. Then we applied Fisher’s meta-analytical test to assess the adequacy of the evidence to support the hypothesis that vendace population dynam-ics include two-year cyclicity. The results supported this hypothesis for RECbut not for SB or LD. Yet, the indicators and test are conservative and time-series of SB and LD are shorter than those for REC. The appearance of cycles in REC is associated with high post-recruitment mortality, consequently practically only one spawning per cohort. Cycles may be typical for the recovery period from low abundance period also. Still, some populations with moderate post-REC mortality and non-cyclic SB abundance exhibited cycles in REC. Such dynamics presuppose the existence of more complex regulation based on the interaction of different life stages. peerReviewed Article in Journal/Newspaper Fennoscandian JYX - Jyväskylä University Digital Archive |
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JYX - Jyväskylä University Digital Archive |
op_collection_id |
ftjyvaeskylaenun |
language |
English |
topic |
kalakannat populaatiodynamiikka muikku kannanvaihtelut |
spellingShingle |
kalakannat populaatiodynamiikka muikku kannanvaihtelut Marjomäki, Timo J. Auvinen, Heikki Helminen, Harri Huusko, Ari Huuskonen, Hannu Hyvärinen, Pekka Jurvelius, Juha Sarvala, Jouko Valkeajärvi, Pentti Viljanen, Markku Karjalainen, Juha Occurrence of Two-Year Cyclicity, “Saw-Blade Fluctuation”, in Vendace Populations in Finland |
topic_facet |
kalakannat populaatiodynamiikka muikku kannanvaihtelut |
description |
The tendency towards two-year cyclicity is considered typical of many Fennoscandian vendace populations, especially in fluctuation of recruitment, based on time series of individual lakes. We used two robust indicators to identify and quantify two-year cycles in vendace population proxy time series at different life-stages — spawning stock biomass (SB), density of newly hatched larvae (LD) and recruitment (REC) — from 22 Finnish lakes. Then we applied Fisher’s meta-analytical test to assess the adequacy of the evidence to support the hypothesis that vendace population dynam-ics include two-year cyclicity. The results supported this hypothesis for RECbut not for SB or LD. Yet, the indicators and test are conservative and time-series of SB and LD are shorter than those for REC. The appearance of cycles in REC is associated with high post-recruitment mortality, consequently practically only one spawning per cohort. Cycles may be typical for the recovery period from low abundance period also. Still, some populations with moderate post-REC mortality and non-cyclic SB abundance exhibited cycles in REC. Such dynamics presuppose the existence of more complex regulation based on the interaction of different life stages. peerReviewed |
format |
Article in Journal/Newspaper |
author |
Marjomäki, Timo J. Auvinen, Heikki Helminen, Harri Huusko, Ari Huuskonen, Hannu Hyvärinen, Pekka Jurvelius, Juha Sarvala, Jouko Valkeajärvi, Pentti Viljanen, Markku Karjalainen, Juha |
author_facet |
Marjomäki, Timo J. Auvinen, Heikki Helminen, Harri Huusko, Ari Huuskonen, Hannu Hyvärinen, Pekka Jurvelius, Juha Sarvala, Jouko Valkeajärvi, Pentti Viljanen, Markku Karjalainen, Juha |
author_sort |
Marjomäki, Timo J. |
title |
Occurrence of Two-Year Cyclicity, “Saw-Blade Fluctuation”, in Vendace Populations in Finland |
title_short |
Occurrence of Two-Year Cyclicity, “Saw-Blade Fluctuation”, in Vendace Populations in Finland |
title_full |
Occurrence of Two-Year Cyclicity, “Saw-Blade Fluctuation”, in Vendace Populations in Finland |
title_fullStr |
Occurrence of Two-Year Cyclicity, “Saw-Blade Fluctuation”, in Vendace Populations in Finland |
title_full_unstemmed |
Occurrence of Two-Year Cyclicity, “Saw-Blade Fluctuation”, in Vendace Populations in Finland |
title_sort |
occurrence of two-year cyclicity, “saw-blade fluctuation”, in vendace populations in finland |
publisher |
Finnish Zoological and Botanical Publishing Board |
publishDate |
2021 |
url |
http://urn.fi/URN:NBN:fi:jyu-202110115111 |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_relation |
Annales Zoologici Fennici 0003-455X 4-6 58 10.5735/086.058.0408 Marjomäki, T. J., Auvinen, H., Helminen, H., Huusko, A., Huuskonen, H., Hyvärinen, P., Jurvelius, J., Sarvala, J., Valkeajärvi, P., Viljanen, M., & Karjalainen, J. (2021). Occurrence of Two-Year Cyclicity, “Saw-Blade Fluctuation”, in Vendace Populations in Finland. Annales Zoologici Fennici , 58 (4-6), 215-229. https://doi.org/10.5735/086.058.0408 CONVID_101389085 URN:NBN:fi:jyu-202110115111 http://urn.fi/URN:NBN:fi:jyu-202110115111 |
op_rights |
In Copyright © Finnish Zoological and Botanical Publishing Board openAccess http://rightsstatements.org/page/InC/1.0/?language=en |
_version_ |
1799479778299871232 |