Otolith microchemistry and diadromy in Patagonian river fishes
Coastal habitats in Chile are hypothesized to support a number of diadromous fish species. The objective of this study was to document migratory life histories of native galaxiids and introduced salmonids from a wide latitudinal range in Chilean Patagonia (39–48°S). Otolith microchemistry data were...
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| Format: | Article |
| Language: | English |
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PeerJ Inc.
2019-01-01
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| Series: | PeerJ |
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| Online Access: | https://peerj.com/articles/6149.pdf |
| _version_ | 1827607840867483648 |
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| author | Dominique Alò Cristian Correa Horacio Samaniego Corey A. Krabbenhoft Thomas F. Turner |
| author_facet | Dominique Alò Cristian Correa Horacio Samaniego Corey A. Krabbenhoft Thomas F. Turner |
| author_sort | Dominique Alò |
| collection | DOAJ |
| description | Coastal habitats in Chile are hypothesized to support a number of diadromous fish species. The objective of this study was to document migratory life histories of native galaxiids and introduced salmonids from a wide latitudinal range in Chilean Patagonia (39–48°S). Otolith microchemistry data were analysed using a recursive partitioning approach to test for diadromy. Based on annular analysis of Sr:Ca ratios, a diadromous life history was suggested for populations of native Aplochiton taeniatus, A. marinus, and Galaxias maculatus. Lifetime residency in freshwater was suggested for populations of A. zebra and G. platei. Among introduced salmonids, populations of Oncorhynchus tshawytscha and O. kisutch exhibited patterns consistent with anadromy, whereas the screened population of O. mykiss appeared restricted to freshwater. Salmo trutta exhibited variable patterns suggesting freshwater residency and possibly anadromy in one case. The capacity and geographic scope of hydropower development is increasing and may disrupt migratory routes of diadromous fishes. Identification of diadromous species is a critical first step for preventing their loss due to hydropower development. |
| first_indexed | 2024-03-09T07:02:32Z |
| format | Article |
| id | doaj.art-c70b1196e05a497bb5f78ccb90bd219e |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T07:02:32Z |
| publishDate | 2019-01-01 |
| publisher | PeerJ Inc. |
| record_format | Article |
| series | PeerJ |
| spelling | doaj.art-c70b1196e05a497bb5f78ccb90bd219e2023-12-03T09:50:33ZengPeerJ Inc.PeerJ2167-83592019-01-017e614910.7717/peerj.6149Otolith microchemistry and diadromy in Patagonian river fishesDominique Alò0Cristian Correa1Horacio Samaniego2Corey A. Krabbenhoft3Thomas F. Turner4Departamento de Ecología, Pontificia Universidad Católica de Chile, Santiago, ChileInstituto de Conservación Biodiversidad y Territorio, Universidad Austral de Chile, Valdivia, Los Ríos, ChileLaboratorio de Ecoinformática, Instituto de Conservación Biodiversidad y Territorio, Universidad Austral de Chile, Valdivia, Los Ríos, ChileDepartment of Biology and Museum of Southwestern Biology, University of New Mexico, Albuquerque, NM, United States of AmericaDepartment of Biology and Museum of Southwestern Biology, University of New Mexico, Albuquerque, NM, United States of AmericaCoastal habitats in Chile are hypothesized to support a number of diadromous fish species. The objective of this study was to document migratory life histories of native galaxiids and introduced salmonids from a wide latitudinal range in Chilean Patagonia (39–48°S). Otolith microchemistry data were analysed using a recursive partitioning approach to test for diadromy. Based on annular analysis of Sr:Ca ratios, a diadromous life history was suggested for populations of native Aplochiton taeniatus, A. marinus, and Galaxias maculatus. Lifetime residency in freshwater was suggested for populations of A. zebra and G. platei. Among introduced salmonids, populations of Oncorhynchus tshawytscha and O. kisutch exhibited patterns consistent with anadromy, whereas the screened population of O. mykiss appeared restricted to freshwater. Salmo trutta exhibited variable patterns suggesting freshwater residency and possibly anadromy in one case. The capacity and geographic scope of hydropower development is increasing and may disrupt migratory routes of diadromous fishes. Identification of diadromous species is a critical first step for preventing their loss due to hydropower development.https://peerj.com/articles/6149.pdfNonnative speciesPacific salmonEstuaryFacultative migrationLife historyHydropower |
| spellingShingle | Dominique Alò Cristian Correa Horacio Samaniego Corey A. Krabbenhoft Thomas F. Turner Otolith microchemistry and diadromy in Patagonian river fishes PeerJ Nonnative species Pacific salmon Estuary Facultative migration Life history Hydropower |
| title | Otolith microchemistry and diadromy in Patagonian river fishes |
| title_full | Otolith microchemistry and diadromy in Patagonian river fishes |
| title_fullStr | Otolith microchemistry and diadromy in Patagonian river fishes |
| title_full_unstemmed | Otolith microchemistry and diadromy in Patagonian river fishes |
| title_short | Otolith microchemistry and diadromy in Patagonian river fishes |
| title_sort | otolith microchemistry and diadromy in patagonian river fishes |
| topic | Nonnative species Pacific salmon Estuary Facultative migration Life history Hydropower |
| url | https://peerj.com/articles/6149.pdf |
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