Validation of scale-age determination in European grayling Thymallus thymallus using tag-recapture analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00020711%3A_____%2F10%3A1R000018" target="_blank" >RIV/00020711:_____/10:1R000018 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Validation of scale-age determination in European grayling Thymallus thymallus using tag-recapture analysis

Popis výsledku v původním jazyce

To validate age determination from scales in European grayling Thymallus thymallus, the scale-read age of fish was compared with the true age obtained by tag-recapture analysis. A total of 3997 individuals were tagged with visible implant tags and passive integrated transponder (PIT) tags in the River Wylye, south-west England during 1999?2007. Annual repeat surveys were undertaken and collected scales read without prior knowledge of tag-recapture age. Accuracy of fish ageing by scales was highest in 1and 2 year-old fish but decreased in older fish. In later life stages (>4 years old), underestimation of age occurred and the error in reading scales rose to 51,9% in 5 year-old fish. Age assigned from scales underestimated the tag-recapture assigned ageby as much as 3 years. This study suggests that use of scales is an appropriate method to age a short-lived population of T. thymallus inhabiting productive lotic systems.

Název v anglickém jazyce

Validation of scale-age determination in European grayling Thymallus thymallus using tag-recapture analysis

Popis výsledku anglicky

To validate age determination from scales in European grayling Thymallus thymallus, the scale-read age of fish was compared with the true age obtained by tag-recapture analysis. A total of 3997 individuals were tagged with visible implant tags and passive integrated transponder (PIT) tags in the River Wylye, south-west England during 1999?2007. Annual repeat surveys were undertaken and collected scales read without prior knowledge of tag-recapture age. Accuracy of fish ageing by scales was highest in 1and 2 year-old fish but decreased in older fish. In later life stages (>4 years old), underestimation of age occurred and the error in reading scales rose to 51,9% in 5 year-old fish. Age assigned from scales underestimated the tag-recapture assigned ageby as much as 3 years. This study suggests that use of scales is an appropriate method to age a short-lived population of T. thymallus inhabiting productive lotic systems.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

GL - Rybářství

OECD FORD obor

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Projekt

<a href="/cs/project/QH71305" target="_blank" >QH71305: Vývoj nových metod chovu vybraných perspektivních akvakulturních druhů s využitím netradičních technologií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Fish Biology

ISSN

0022-1112

e-ISSN

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Svazek periodika

Neuveden

Číslo periodika v rámci svazku

77

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

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Kód UT WoS článku

000279903700010

EID výsledku v databázi Scopus

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