Axial rod growth and age estimation of the sea pen

Halipteris willemoesi is a large octocoral commonly found in the Bering Sea. It is a member of a ubiquitous group of benthic cnidarians called sea pens (Octocorallia: Pennatulacea). Sea pens have a skeletal structure, the axial rod, that in cross section exhibits growth rings. Pairs of adjacent ring...

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Other Authors: The Pennsylvania State University CiteSeerX Archives
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Language:English
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age
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.496
http://www.pmel.noaa.gov/foci/publications/2002/wilsB394.pdf
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record_format openpolar
spelling ftciteseerx:oai:CiteSeerX.psu:10.1.1.570.496 2023-05-15T15:43:38+02:00 Axial rod growth and age estimation of the sea pen The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.496 http://www.pmel.noaa.gov/foci/publications/2002/wilsB394.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.496 http://www.pmel.noaa.gov/foci/publications/2002/wilsB394.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.pmel.noaa.gov/foci/publications/2002/wilsB394.pdf Key words Pennatulacea age growth axial rod lead-210 radium-226 text ftciteseerx 2016-01-08T12:30:22Z Halipteris willemoesi is a large octocoral commonly found in the Bering Sea. It is a member of a ubiquitous group of benthic cnidarians called sea pens (Octocorallia: Pennatulacea). Sea pens have a skeletal structure, the axial rod, that in cross section exhibits growth rings. Pairs of adjacent rings, or ring couplets, were assumed to be annuli and were used to estimate the age and growth of H. willemoesi. Twelve axial rods, extracted from H. willemoesi collected in the Bering Sea, were selected to represent small (25–29 cm total length), medium (97–130 cm TL) and large (152–167 cm TL) colonies. Each rod resembled a tapered dowel; the thickest part (0.90–6.75 mm in diameter) was at about 5–10 % of total length from the base tip, the distal part was more gradually tapered than was the base. The number of ring couplets increased with rod size indicating their utility in estimating age and growth. Estimated age among rods was based on couplet counts at the thickest part of each rod; the average estimated age (±SE) was 7.1 ±0.7, 19.3 ±0.5, and 44.3 ±2.0 yr for small, medium and large-size rods, respectively. Based on these estimated ages, average growth rate in total length was 3.9 ± 0.2, 6.1 ± 0.3, and 3.6 ± 0.1 cm yr−1 for small, medium, and large-size colonies. The average annual increase in maximum rod diameter among all colonies was 0.145 ± 0.003 SE mm yr−1; therefore, age prediction from maximum rod diameter was calculated (estimated age (yr) = 7.0 ∗ (maximum rod diameter, mm) −0.2; R2 = 0.99). At maximum diameter, the average couplet width was Text Bering Sea Unknown Bering Sea
institution Open Polar
collection Unknown
op_collection_id ftciteseerx
language English
topic Key words
Pennatulacea
age
growth
axial rod
lead-210
radium-226
spellingShingle Key words
Pennatulacea
age
growth
axial rod
lead-210
radium-226
Axial rod growth and age estimation of the sea pen
topic_facet Key words
Pennatulacea
age
growth
axial rod
lead-210
radium-226
description Halipteris willemoesi is a large octocoral commonly found in the Bering Sea. It is a member of a ubiquitous group of benthic cnidarians called sea pens (Octocorallia: Pennatulacea). Sea pens have a skeletal structure, the axial rod, that in cross section exhibits growth rings. Pairs of adjacent rings, or ring couplets, were assumed to be annuli and were used to estimate the age and growth of H. willemoesi. Twelve axial rods, extracted from H. willemoesi collected in the Bering Sea, were selected to represent small (25–29 cm total length), medium (97–130 cm TL) and large (152–167 cm TL) colonies. Each rod resembled a tapered dowel; the thickest part (0.90–6.75 mm in diameter) was at about 5–10 % of total length from the base tip, the distal part was more gradually tapered than was the base. The number of ring couplets increased with rod size indicating their utility in estimating age and growth. Estimated age among rods was based on couplet counts at the thickest part of each rod; the average estimated age (±SE) was 7.1 ±0.7, 19.3 ±0.5, and 44.3 ±2.0 yr for small, medium and large-size rods, respectively. Based on these estimated ages, average growth rate in total length was 3.9 ± 0.2, 6.1 ± 0.3, and 3.6 ± 0.1 cm yr−1 for small, medium, and large-size colonies. The average annual increase in maximum rod diameter among all colonies was 0.145 ± 0.003 SE mm yr−1; therefore, age prediction from maximum rod diameter was calculated (estimated age (yr) = 7.0 ∗ (maximum rod diameter, mm) −0.2; R2 = 0.99). At maximum diameter, the average couplet width was
author2 The Pennsylvania State University CiteSeerX Archives
format Text
title Axial rod growth and age estimation of the sea pen
title_short Axial rod growth and age estimation of the sea pen
title_full Axial rod growth and age estimation of the sea pen
title_fullStr Axial rod growth and age estimation of the sea pen
title_full_unstemmed Axial rod growth and age estimation of the sea pen
title_sort axial rod growth and age estimation of the sea pen
url http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.496
http://www.pmel.noaa.gov/foci/publications/2002/wilsB394.pdf
geographic Bering Sea
geographic_facet Bering Sea
genre Bering Sea
genre_facet Bering Sea
op_source http://www.pmel.noaa.gov/foci/publications/2002/wilsB394.pdf
op_relation http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.496
http://www.pmel.noaa.gov/foci/publications/2002/wilsB394.pdf
op_rights Metadata may be used without restrictions as long as the oai identifier remains attached to it.
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