Validation of growth increments in stylets, beaks and lenses as ageing tools in Octopus maya
Octopus hard structures have recently been used as ageing tools. Thirty-two Octopus maya were raised in captivity in four age groups, ranging from 124 to 233 days old. Their stylets, beaks and eye lenses were analyzed in order to validate the periodicity of growth increments during all the octopus life. Transverse sections of stylets were mounted in glycerin jelly, beaks were sagitally cut to analyze their lateral walls and eye lenses were processed by histological techniques andmounted in resin. Growth increments in each structurewere observed and counted under a microscope. Stylet increments were successfully validated as their counts were closely related to age in days. Beak increments from the two younger age groups showed a close relationship with age, suggesting a daily deposition. However, persistence of lower increment counts strongly suggests that not all growth increments could be counted, probably due to erosion during feeding. Eye lens increment counts did not show a relation with age, although periodicity, if any, might be subdaily. The use of stylets is recommended for O. maya growth and ageing studies as they also showed a high precision in increment counts between readers.
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Subjects: | Octopus maya, Pulpos, Edad, Población animal, Administración de la industria pesquera, |
Online Access: | http://www.researchgate.net/publication/258277723_Validation_of_growth_increments_in_stylets_beaks_and_lenses_as_ageing_tools_in_Octopus_maya/file/50463527c1a203214f.pdf |
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KOHA-OAI-ECOSUR:531482024-03-12T12:53:09ZValidation of growth increments in stylets, beaks and lenses as ageing tools in Octopus maya Rodríguez Domínguez, Almendra 12827 Rosas Correa, Carmen Olivia Maestra autor/a 8671 Méndez Loeza, Iván Maestro coaur. 13858 Markaida Aburto, Unai Doctor autor/a 7960 textengOctopus hard structures have recently been used as ageing tools. Thirty-two Octopus maya were raised in captivity in four age groups, ranging from 124 to 233 days old. Their stylets, beaks and eye lenses were analyzed in order to validate the periodicity of growth increments during all the octopus life. Transverse sections of stylets were mounted in glycerin jelly, beaks were sagitally cut to analyze their lateral walls and eye lenses were processed by histological techniques andmounted in resin. Growth increments in each structurewere observed and counted under a microscope. Stylet increments were successfully validated as their counts were closely related to age in days. Beak increments from the two younger age groups showed a close relationship with age, suggesting a daily deposition. However, persistence of lower increment counts strongly suggests that not all growth increments could be counted, probably due to erosion during feeding. Eye lens increment counts did not show a relation with age, although periodicity, if any, might be subdaily. The use of stylets is recommended for O. maya growth and ageing studies as they also showed a high precision in increment counts between readers.Octopus hard structures have recently been used as ageing tools. Thirty-two Octopus maya were raised in captivity in four age groups, ranging from 124 to 233 days old. Their stylets, beaks and eye lenses were analyzed in order to validate the periodicity of growth increments during all the octopus life. Transverse sections of stylets were mounted in glycerin jelly, beaks were sagitally cut to analyze their lateral walls and eye lenses were processed by histological techniques andmounted in resin. Growth increments in each structurewere observed and counted under a microscope. Stylet increments were successfully validated as their counts were closely related to age in days. Beak increments from the two younger age groups showed a close relationship with age, suggesting a daily deposition. However, persistence of lower increment counts strongly suggests that not all growth increments could be counted, probably due to erosion during feeding. Eye lens increment counts did not show a relation with age, although periodicity, if any, might be subdaily. The use of stylets is recommended for O. maya growth and ageing studies as they also showed a high precision in increment counts between readers.Adobe Acrobat profesional 6.0 o superiorOctopus mayaPulposEdadPoblación animalAdministración de la industria pesqueraDisponible en líneaJournal of Experimental Marine Biology and Ecologyhttp://www.researchgate.net/publication/258277723_Validation_of_growth_increments_in_stylets_beaks_and_lenses_as_ageing_tools_in_Octopus_maya/file/50463527c1a203214f.pdfAcceso en línea sin restricciones |
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Octopus maya Pulpos Edad Población animal Administración de la industria pesquera Octopus maya Pulpos Edad Población animal Administración de la industria pesquera |
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Octopus maya Pulpos Edad Población animal Administración de la industria pesquera Octopus maya Pulpos Edad Población animal Administración de la industria pesquera Rodríguez Domínguez, Almendra 12827 Rosas Correa, Carmen Olivia Maestra autor/a 8671 Méndez Loeza, Iván Maestro coaur. 13858 Markaida Aburto, Unai Doctor autor/a 7960 Validation of growth increments in stylets, beaks and lenses as ageing tools in Octopus maya |
description |
Octopus hard structures have recently been used as ageing tools. Thirty-two Octopus maya were raised in captivity in four age groups, ranging from 124 to 233 days old. Their stylets, beaks and eye lenses were analyzed in order to validate the periodicity of growth increments during all the octopus life. Transverse sections of stylets were mounted in glycerin jelly, beaks were sagitally cut to analyze their lateral walls and eye lenses were processed by histological techniques andmounted in resin. Growth increments in each structurewere observed and counted under a microscope. Stylet increments were successfully validated as their counts were closely related to age in days. Beak increments from the two younger age groups showed a close relationship with age, suggesting a daily deposition. However, persistence of lower increment counts strongly suggests that not all growth increments could be counted, probably due to erosion during feeding. Eye lens increment counts did not show a relation with age, although periodicity, if any, might be subdaily. The use of stylets is recommended for O. maya growth and ageing studies as they also showed a high precision in increment counts between readers. |
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Octopus maya Pulpos Edad Población animal Administración de la industria pesquera |
author |
Rodríguez Domínguez, Almendra 12827 Rosas Correa, Carmen Olivia Maestra autor/a 8671 Méndez Loeza, Iván Maestro coaur. 13858 Markaida Aburto, Unai Doctor autor/a 7960 |
author_facet |
Rodríguez Domínguez, Almendra 12827 Rosas Correa, Carmen Olivia Maestra autor/a 8671 Méndez Loeza, Iván Maestro coaur. 13858 Markaida Aburto, Unai Doctor autor/a 7960 |
author_sort |
Rodríguez Domínguez, Almendra 12827 |
title |
Validation of growth increments in stylets, beaks and lenses as ageing tools in Octopus maya |
title_short |
Validation of growth increments in stylets, beaks and lenses as ageing tools in Octopus maya |
title_full |
Validation of growth increments in stylets, beaks and lenses as ageing tools in Octopus maya |
title_fullStr |
Validation of growth increments in stylets, beaks and lenses as ageing tools in Octopus maya |
title_full_unstemmed |
Validation of growth increments in stylets, beaks and lenses as ageing tools in Octopus maya |
title_sort |
validation of growth increments in stylets, beaks and lenses as ageing tools in octopus maya |
url |
http://www.researchgate.net/publication/258277723_Validation_of_growth_increments_in_stylets_beaks_and_lenses_as_ageing_tools_in_Octopus_maya/file/50463527c1a203214f.pdf |
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