Seasonal changes in the lower jaw skeleton in male Atlantic salmon (Salmo salar L.) : remodelling and regression of the kype after spawning
The return of Atlantic salmon (Salmon salar) to their home river for spawning coincides with drastic skeletal alterations in both sexes. Most prominent is the development of a kype (hook) at the tip of the lower jaw in males. Salmon that survive spawning have to cope with the kype throughout their l...
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ftunivgent:oai:archive.ugent.be:8646057 2023-06-11T04:10:17+02:00 Seasonal changes in the lower jaw skeleton in male Atlantic salmon (Salmo salar L.) : remodelling and regression of the kype after spawning Witten, Paul Eckhard Hall, Brian K 2003 application/pdf https://biblio.ugent.be/publication/8646057 http://hdl.handle.net/1854/LU-8646057 https://doi.org/10.1046/j.1469-7580.2003.00239.x https://biblio.ugent.be/publication/8646057/file/8646058 eng eng https://biblio.ugent.be/publication/8646057 http://hdl.handle.net/1854/LU-8646057 http://dx.doi.org/10.1046/j.1469-7580.2003.00239.x https://biblio.ugent.be/publication/8646057/file/8646058 No license (in copyright) info:eu-repo/semantics/restrictedAccess JOURNAL OF ANATOMY ISSN: 0021-8782 ISSN: 1469-7580 Biology and Life Sciences bone growth bone remodelling hook kype secondary sexual character spawning migration UPPER PHARYNGEAL JAWS BONE-RESORBING CELLS OREOCHROMIS-NILOTICUS ACELLULAR BONE TELEOST FISH ASTATOTILAPIA-ELEGANS NEUROCRANIAL BASE CHONDROID BONE FRESH-WATER CALCIUM journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2003 ftunivgent https://doi.org/10.1046/j.1469-7580.2003.00239.x 2023-05-10T22:38:27Z The return of Atlantic salmon (Salmon salar) to their home river for spawning coincides with drastic skeletal alterations in both sexes. Most prominent is the development of a kype (hook) at the tip of the lower jaw in males. Salmon that survive spawning have to cope with the kype throughout their life, unless it disappears after spawning, as was suggested in the early literature. To understand the fate of the kype skeleton, we compared morphological and histological features of kypes from pre-spawned mature anadromous males (grilse) with post-spawned males (kelts). The kype of male grilse is supported by fast-growing skeletal needles that differ from regular dentary bone. In kelts, growth of the kype skeleton has stopped and skeletal needles are resorbed apically by osteoclasts. Simultaneously, and despite the critical physiological condition of the animals, proximal parts of the kype skeleton are remodelled and converted into regular dentary bone. Apical resorption of the skeleton explains reports of a decrease of the kype in kelts. The conversion of basal kype skeleton into regular dentary bone contributes to the elongation of the dentary and probably also to the development of a larger kype in repetitive spawning males. Article in Journal/Newspaper Atlantic salmon Salmo salar Ghent University Academic Bibliography Journal of Anatomy 203 5 435 450 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences bone growth bone remodelling hook kype secondary sexual character spawning migration UPPER PHARYNGEAL JAWS BONE-RESORBING CELLS OREOCHROMIS-NILOTICUS ACELLULAR BONE TELEOST FISH ASTATOTILAPIA-ELEGANS NEUROCRANIAL BASE CHONDROID BONE FRESH-WATER CALCIUM |
spellingShingle |
Biology and Life Sciences bone growth bone remodelling hook kype secondary sexual character spawning migration UPPER PHARYNGEAL JAWS BONE-RESORBING CELLS OREOCHROMIS-NILOTICUS ACELLULAR BONE TELEOST FISH ASTATOTILAPIA-ELEGANS NEUROCRANIAL BASE CHONDROID BONE FRESH-WATER CALCIUM Witten, Paul Eckhard Hall, Brian K Seasonal changes in the lower jaw skeleton in male Atlantic salmon (Salmo salar L.) : remodelling and regression of the kype after spawning |
topic_facet |
Biology and Life Sciences bone growth bone remodelling hook kype secondary sexual character spawning migration UPPER PHARYNGEAL JAWS BONE-RESORBING CELLS OREOCHROMIS-NILOTICUS ACELLULAR BONE TELEOST FISH ASTATOTILAPIA-ELEGANS NEUROCRANIAL BASE CHONDROID BONE FRESH-WATER CALCIUM |
description |
The return of Atlantic salmon (Salmon salar) to their home river for spawning coincides with drastic skeletal alterations in both sexes. Most prominent is the development of a kype (hook) at the tip of the lower jaw in males. Salmon that survive spawning have to cope with the kype throughout their life, unless it disappears after spawning, as was suggested in the early literature. To understand the fate of the kype skeleton, we compared morphological and histological features of kypes from pre-spawned mature anadromous males (grilse) with post-spawned males (kelts). The kype of male grilse is supported by fast-growing skeletal needles that differ from regular dentary bone. In kelts, growth of the kype skeleton has stopped and skeletal needles are resorbed apically by osteoclasts. Simultaneously, and despite the critical physiological condition of the animals, proximal parts of the kype skeleton are remodelled and converted into regular dentary bone. Apical resorption of the skeleton explains reports of a decrease of the kype in kelts. The conversion of basal kype skeleton into regular dentary bone contributes to the elongation of the dentary and probably also to the development of a larger kype in repetitive spawning males. |
format |
Article in Journal/Newspaper |
author |
Witten, Paul Eckhard Hall, Brian K |
author_facet |
Witten, Paul Eckhard Hall, Brian K |
author_sort |
Witten, Paul Eckhard |
title |
Seasonal changes in the lower jaw skeleton in male Atlantic salmon (Salmo salar L.) : remodelling and regression of the kype after spawning |
title_short |
Seasonal changes in the lower jaw skeleton in male Atlantic salmon (Salmo salar L.) : remodelling and regression of the kype after spawning |
title_full |
Seasonal changes in the lower jaw skeleton in male Atlantic salmon (Salmo salar L.) : remodelling and regression of the kype after spawning |
title_fullStr |
Seasonal changes in the lower jaw skeleton in male Atlantic salmon (Salmo salar L.) : remodelling and regression of the kype after spawning |
title_full_unstemmed |
Seasonal changes in the lower jaw skeleton in male Atlantic salmon (Salmo salar L.) : remodelling and regression of the kype after spawning |
title_sort |
seasonal changes in the lower jaw skeleton in male atlantic salmon (salmo salar l.) : remodelling and regression of the kype after spawning |
publishDate |
2003 |
url |
https://biblio.ugent.be/publication/8646057 http://hdl.handle.net/1854/LU-8646057 https://doi.org/10.1046/j.1469-7580.2003.00239.x https://biblio.ugent.be/publication/8646057/file/8646058 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
JOURNAL OF ANATOMY ISSN: 0021-8782 ISSN: 1469-7580 |
op_relation |
https://biblio.ugent.be/publication/8646057 http://hdl.handle.net/1854/LU-8646057 http://dx.doi.org/10.1046/j.1469-7580.2003.00239.x https://biblio.ugent.be/publication/8646057/file/8646058 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1046/j.1469-7580.2003.00239.x |
container_title |
Journal of Anatomy |
container_volume |
203 |
container_issue |
5 |
container_start_page |
435 |
op_container_end_page |
450 |
_version_ |
1768384613008277504 |