Gape morphology of cod Gadus morhua L., haddock Melanogrammus aeglefinus (L.) and whiting Merlangius merlangus (L.) through metamorphosis from larvae to juveniles in the western Irish Sea
Variations in standard length ( L S ), gape size ( S G ) and jaw length ( L J ) were studied in larval and juvenile gadoids (cod Gadus morhua , haddock Melanogrammus aeglefinus and whiting Merlangius merlangus ) from 4 to 70 mm. The increase in S G and L J was not linear with respect to L S . The re...
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crwiley:10.1111/j.1095-8649.2006.01200.x 2024-06-23T07:52:55+00:00 Gape morphology of cod Gadus morhua L., haddock Melanogrammus aeglefinus (L.) and whiting Merlangius merlangus (L.) through metamorphosis from larvae to juveniles in the western Irish Sea Rowlands, W. Ll. Dickey‐Collas, M. Geffen, A. J. Nash, R. D. M. 2006 http://dx.doi.org/10.1111/j.1095-8649.2006.01200.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2006.01200.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2006.01200.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 69, issue 5, page 1379-1395 ISSN 0022-1112 1095-8649 journal-article 2006 crwiley https://doi.org/10.1111/j.1095-8649.2006.01200.x 2024-06-04T06:46:48Z Variations in standard length ( L S ), gape size ( S G ) and jaw length ( L J ) were studied in larval and juvenile gadoids (cod Gadus morhua , haddock Melanogrammus aeglefinus and whiting Merlangius merlangus ) from 4 to 70 mm. The increase in S G and L J was not linear with respect to L S . The relationship was best described by segmented regression lines in all three species, with an inflection point at c . 10·5 mm. The S G and L J increased more rapidly in relation to larval L S for individuals smaller than this inflection point size. The rates of increase slowed significantly post‐inflection, an effect more noticeable in S G data compared to L J data. In each case, the inflection point fell in the intermediate period of development between the larval and juvenile stages, which could be considered as metamorphosis. Published equations that have been used to predict S G from L J lead to the overestimation of gape. New relationships are presented, which may be used to predict S G from measurements of either L S or upper jaw length in cod, haddock and whiting. Article in Journal/Newspaper Gadus morhua Wiley Online Library Journal of Fish Biology 69 5 1379 1395 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Variations in standard length ( L S ), gape size ( S G ) and jaw length ( L J ) were studied in larval and juvenile gadoids (cod Gadus morhua , haddock Melanogrammus aeglefinus and whiting Merlangius merlangus ) from 4 to 70 mm. The increase in S G and L J was not linear with respect to L S . The relationship was best described by segmented regression lines in all three species, with an inflection point at c . 10·5 mm. The S G and L J increased more rapidly in relation to larval L S for individuals smaller than this inflection point size. The rates of increase slowed significantly post‐inflection, an effect more noticeable in S G data compared to L J data. In each case, the inflection point fell in the intermediate period of development between the larval and juvenile stages, which could be considered as metamorphosis. Published equations that have been used to predict S G from L J lead to the overestimation of gape. New relationships are presented, which may be used to predict S G from measurements of either L S or upper jaw length in cod, haddock and whiting. |
format |
Article in Journal/Newspaper |
author |
Rowlands, W. Ll. Dickey‐Collas, M. Geffen, A. J. Nash, R. D. M. |
spellingShingle |
Rowlands, W. Ll. Dickey‐Collas, M. Geffen, A. J. Nash, R. D. M. Gape morphology of cod Gadus morhua L., haddock Melanogrammus aeglefinus (L.) and whiting Merlangius merlangus (L.) through metamorphosis from larvae to juveniles in the western Irish Sea |
author_facet |
Rowlands, W. Ll. Dickey‐Collas, M. Geffen, A. J. Nash, R. D. M. |
author_sort |
Rowlands, W. Ll. |
title |
Gape morphology of cod Gadus morhua L., haddock Melanogrammus aeglefinus (L.) and whiting Merlangius merlangus (L.) through metamorphosis from larvae to juveniles in the western Irish Sea |
title_short |
Gape morphology of cod Gadus morhua L., haddock Melanogrammus aeglefinus (L.) and whiting Merlangius merlangus (L.) through metamorphosis from larvae to juveniles in the western Irish Sea |
title_full |
Gape morphology of cod Gadus morhua L., haddock Melanogrammus aeglefinus (L.) and whiting Merlangius merlangus (L.) through metamorphosis from larvae to juveniles in the western Irish Sea |
title_fullStr |
Gape morphology of cod Gadus morhua L., haddock Melanogrammus aeglefinus (L.) and whiting Merlangius merlangus (L.) through metamorphosis from larvae to juveniles in the western Irish Sea |
title_full_unstemmed |
Gape morphology of cod Gadus morhua L., haddock Melanogrammus aeglefinus (L.) and whiting Merlangius merlangus (L.) through metamorphosis from larvae to juveniles in the western Irish Sea |
title_sort |
gape morphology of cod gadus morhua l., haddock melanogrammus aeglefinus (l.) and whiting merlangius merlangus (l.) through metamorphosis from larvae to juveniles in the western irish sea |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1111/j.1095-8649.2006.01200.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2006.01200.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2006.01200.x |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Journal of Fish Biology volume 69, issue 5, page 1379-1395 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.2006.01200.x |
container_title |
Journal of Fish Biology |
container_volume |
69 |
container_issue |
5 |
container_start_page |
1379 |
op_container_end_page |
1395 |
_version_ |
1802644374336569344 |