Morphological changes during metamorphosis in cod ( Gadus morhua L.), with particular reference to the development of the stomach and pyloric caeca
Metamorphosis in cod, Gadus morhua L., was investigated with respect to morphological changes in the alimentary tract (mouth, stomach and pyloric caeca) and external characters (finfold and fin development). Morphometric measurements and histological investigations were made on both larvae and juven...
Published in: | Journal of Fish Biology |
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Language: | English |
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Wiley
1992
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Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1992.tb02673.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1992.tb02673.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1992.tb02673.x |
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crwiley:10.1111/j.1095-8649.1992.tb02673.x 2024-06-23T07:52:55+00:00 Morphological changes during metamorphosis in cod ( Gadus morhua L.), with particular reference to the development of the stomach and pyloric caeca Pedersen, T. Falk‐Petersen, I. B. 1992 http://dx.doi.org/10.1111/j.1095-8649.1992.tb02673.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1992.tb02673.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1992.tb02673.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 41, issue 3, page 449-461 ISSN 0022-1112 1095-8649 journal-article 1992 crwiley https://doi.org/10.1111/j.1095-8649.1992.tb02673.x 2024-06-04T06:41:13Z Metamorphosis in cod, Gadus morhua L., was investigated with respect to morphological changes in the alimentary tract (mouth, stomach and pyloric caeca) and external characters (finfold and fin development). Morphometric measurements and histological investigations were made on both larvae and juveniles and all fish lengths are given as standard length. Median unpaired fins started to develop when the fish were 9–10 mm in length. The larval median finfold was resorbed when fish reached a size of 11–15 mm. The vertebrae were formed in fish of 11–20 mm. The supraterminal mouth, seen in larvae <12 mm, changed gradually to a sub‐terminal position in juveniles larger than 65 mm. The development of the stomach and pyloric caeca started at 15 mm and the juvenile form was seen in fish of 40 mm. The ability to store and grind food particles in the stomach developed gradually as fish increased in size from 20 to 40 mm. Compared to many other teleost species, cod juveniles are relatively large when the stomach and pyloric caeca become fully developed. These findings may have important implications for both start‐feeding of cod larvae and the weaning of juveniles on to artificial diets. Article in Journal/Newspaper Gadus morhua Wiley Online Library Journal of Fish Biology 41 3 449 461 |
institution |
Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Metamorphosis in cod, Gadus morhua L., was investigated with respect to morphological changes in the alimentary tract (mouth, stomach and pyloric caeca) and external characters (finfold and fin development). Morphometric measurements and histological investigations were made on both larvae and juveniles and all fish lengths are given as standard length. Median unpaired fins started to develop when the fish were 9–10 mm in length. The larval median finfold was resorbed when fish reached a size of 11–15 mm. The vertebrae were formed in fish of 11–20 mm. The supraterminal mouth, seen in larvae <12 mm, changed gradually to a sub‐terminal position in juveniles larger than 65 mm. The development of the stomach and pyloric caeca started at 15 mm and the juvenile form was seen in fish of 40 mm. The ability to store and grind food particles in the stomach developed gradually as fish increased in size from 20 to 40 mm. Compared to many other teleost species, cod juveniles are relatively large when the stomach and pyloric caeca become fully developed. These findings may have important implications for both start‐feeding of cod larvae and the weaning of juveniles on to artificial diets. |
format |
Article in Journal/Newspaper |
author |
Pedersen, T. Falk‐Petersen, I. B. |
spellingShingle |
Pedersen, T. Falk‐Petersen, I. B. Morphological changes during metamorphosis in cod ( Gadus morhua L.), with particular reference to the development of the stomach and pyloric caeca |
author_facet |
Pedersen, T. Falk‐Petersen, I. B. |
author_sort |
Pedersen, T. |
title |
Morphological changes during metamorphosis in cod ( Gadus morhua L.), with particular reference to the development of the stomach and pyloric caeca |
title_short |
Morphological changes during metamorphosis in cod ( Gadus morhua L.), with particular reference to the development of the stomach and pyloric caeca |
title_full |
Morphological changes during metamorphosis in cod ( Gadus morhua L.), with particular reference to the development of the stomach and pyloric caeca |
title_fullStr |
Morphological changes during metamorphosis in cod ( Gadus morhua L.), with particular reference to the development of the stomach and pyloric caeca |
title_full_unstemmed |
Morphological changes during metamorphosis in cod ( Gadus morhua L.), with particular reference to the development of the stomach and pyloric caeca |
title_sort |
morphological changes during metamorphosis in cod ( gadus morhua l.), with particular reference to the development of the stomach and pyloric caeca |
publisher |
Wiley |
publishDate |
1992 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1992.tb02673.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1992.tb02673.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1992.tb02673.x |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Journal of Fish Biology volume 41, issue 3, page 449-461 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1992.tb02673.x |
container_title |
Journal of Fish Biology |
container_volume |
41 |
container_issue |
3 |
container_start_page |
449 |
op_container_end_page |
461 |
_version_ |
1802644374921674752 |