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Assessment of spawning site fidelity in interior Fraser River Coho salmon Oncorhynchus kisutch using otolith microchemistry, in British Columbia, Canada.
Turcotte, Luc A; Shrimpton, J Mark.
Afiliação
  • Turcotte LA; Ecosystem Science and Management (Biology) Program, University of Northern British Columbia, Prince George, British Columbia, Canada.
  • Shrimpton JM; Ecosystem Science and Management (Biology) Program, University of Northern British Columbia, Prince George, British Columbia, Canada.
J Fish Biol ; 97(6): 1833-1841, 2020 Dec.
Article em En | MEDLINE | ID: mdl-32951208
Coho Salmon Oncorhynchus kisutch show fidelity to natal spawning watersheds. Fine-scale homing, however, within rivers is not well understood. Interior Fraser Coho (IFC) salmon eggs were incubated at known spawning locations in the Coldwater River, two main stem sites and one-off channel pond site, providing otolith reference data for comparison to otolith signatures for returning adults using laser ablation inductively coupled plasma mass spectrometry. Elemental ratios for Ba:Ca and Sr:Ca in otoliths of juvenile O. kisutch differed significantly among the spawning locations examined. Juvenile otolith data were used to conduct a linear discriminant analysis to assess fine-scale homing in adults. Juvenile data were all assigned to the location where they had been incubated, producing a robust data set used to compare adult otoliths and define natal locations based on elemental signatures in otoliths of adult spawners. Homing and straying were apparent at the reach level; 57.1% of adults returned to their natal spawning locations, while 42.9% strayed to other spawning sites within the Coldwater River. Straying to novel incubation sites at the reach scale demonstrated plasticity in homing within a watershed.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Reprodução / Membrana dos Otólitos / Oncorhynchus kisutch / Microquímica Limite: Animals País/Região como assunto: America do norte Idioma: En Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Reprodução / Membrana dos Otólitos / Oncorhynchus kisutch / Microquímica Limite: Animals País/Região como assunto: America do norte Idioma: En Ano de publicação: 2020 Tipo de documento: Article