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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Blackwell Science Inc
2003
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ftpubmed:oai:pubmedcentral.nih.gov:1571185 2023-05-15T15:31:25+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, P Eckhard Hall, Brian K 2003-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1571185 http://www.ncbi.nlm.nih.gov/pubmed/14635799 https://doi.org/10.1046/j.1469-7580.2003.00239.x en eng Blackwell Science Inc http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1571185 http://www.ncbi.nlm.nih.gov/pubmed/14635799 http://dx.doi.org/10.1046/j.1469-7580.2003.00239.x © Anatomical Society of Great Britain and Ireland 2003 Original Articles Text 2003 ftpubmed https://doi.org/10.1046/j.1469-7580.2003.00239.x 2013-08-31T06:53:50Z 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. Text Atlantic salmon Salmo salar PubMed Central (PMC) Journal of Anatomy 203 5 435 450 |
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Original Articles |
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Original Articles Witten, P 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 |
Original Articles |
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 |
Text |
author |
Witten, P Eckhard Hall, Brian K |
author_facet |
Witten, P Eckhard Hall, Brian K |
author_sort |
Witten, P 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 |
publisher |
Blackwell Science Inc |
publishDate |
2003 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1571185 http://www.ncbi.nlm.nih.gov/pubmed/14635799 https://doi.org/10.1046/j.1469-7580.2003.00239.x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1571185 http://www.ncbi.nlm.nih.gov/pubmed/14635799 http://dx.doi.org/10.1046/j.1469-7580.2003.00239.x |
op_rights |
© Anatomical Society of Great Britain and Ireland 2003 |
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_ |
1766361911947952128 |