Post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency
The conventional view of spawning in iteroparous bony fish, i.e., the “reproductive drain hypothesis,” is based on the observation that somatic growth (in length) slows down noticeably at approximately the time fish attain maturity, and hence the assumption is made that investment in gonadal develop...
Published in: | Environmental Biology of Fishes |
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2023
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Online Access: | https://oceanrep.geomar.de/id/eprint/59343/ https://oceanrep.geomar.de/id/eprint/59343/7/s10641-023-01482-2.pdf https://link.springer.com/article/10.1007/s10641-023-01482-2 https://doi.org/10.1007/s10641-023-01482-2 |
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ftoceanrep:oai:oceanrep.geomar.de:59343 2024-02-11T10:03:56+01:00 Post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency Pauly, Daniel Froese, Rainer Liang, Cui Müller, Johannes Sorensen, Peter 2023-11-06 text https://oceanrep.geomar.de/id/eprint/59343/ https://oceanrep.geomar.de/id/eprint/59343/7/s10641-023-01482-2.pdf https://link.springer.com/article/10.1007/s10641-023-01482-2 https://doi.org/10.1007/s10641-023-01482-2 en eng Springer https://oceanrep.geomar.de/id/eprint/59343/7/s10641-023-01482-2.pdf Pauly, D., Froese, R. , Liang, C., Müller, J. and Sorensen, P. (2023) Post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency. Open Access Environmental Biology of Fishes, 106 . pp. 2031-2043. DOI 10.1007/s10641-023-01482-2 <https://doi.org/10.1007/s10641-023-01482-2>. doi:10.1007/s10641-023-01482-2 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2023 ftoceanrep https://doi.org/10.1007/s10641-023-01482-2 2024-01-15T00:27:49Z The conventional view of spawning in iteroparous bony fish, i.e., the “reproductive drain hypothesis,” is based on the observation that somatic growth (in length) slows down noticeably at approximately the time fish attain maturity, and hence the assumption is made that investment in gonadal development slows down growth. However, when this is translated as growth in weight, the weight at first maturity (or puberty) is usually smaller than the weight at which growth rate is highest, i.e., weight growth accelerates after first maturity. We solve this conundrum, with some emphasis on female cod (Gadus morhua), by proposing the hypothesis that the substantial loss of body mass experienced by fish as a result of spawning is quickly compensated for by increased somatic growth after the spawning period, notably because of the increase in food conversion efficiency resulting from a sudden loss of body weight, which necessarily leads to a large increase in relative oxygen supply via the gills. This is consistent with the argument developed elsewhere that declining relative oxygen supply by the gills, whose surface area cannot keep up with increasing body weight, is the reason for growth rate declining with weight in adult fish. Article in Journal/Newspaper Gadus morhua OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Environmental Biology of Fishes 106 11 2031 2043 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
The conventional view of spawning in iteroparous bony fish, i.e., the “reproductive drain hypothesis,” is based on the observation that somatic growth (in length) slows down noticeably at approximately the time fish attain maturity, and hence the assumption is made that investment in gonadal development slows down growth. However, when this is translated as growth in weight, the weight at first maturity (or puberty) is usually smaller than the weight at which growth rate is highest, i.e., weight growth accelerates after first maturity. We solve this conundrum, with some emphasis on female cod (Gadus morhua), by proposing the hypothesis that the substantial loss of body mass experienced by fish as a result of spawning is quickly compensated for by increased somatic growth after the spawning period, notably because of the increase in food conversion efficiency resulting from a sudden loss of body weight, which necessarily leads to a large increase in relative oxygen supply via the gills. This is consistent with the argument developed elsewhere that declining relative oxygen supply by the gills, whose surface area cannot keep up with increasing body weight, is the reason for growth rate declining with weight in adult fish. |
format |
Article in Journal/Newspaper |
author |
Pauly, Daniel Froese, Rainer Liang, Cui Müller, Johannes Sorensen, Peter |
spellingShingle |
Pauly, Daniel Froese, Rainer Liang, Cui Müller, Johannes Sorensen, Peter Post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency |
author_facet |
Pauly, Daniel Froese, Rainer Liang, Cui Müller, Johannes Sorensen, Peter |
author_sort |
Pauly, Daniel |
title |
Post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency |
title_short |
Post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency |
title_full |
Post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency |
title_fullStr |
Post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency |
title_full_unstemmed |
Post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency |
title_sort |
post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency |
publisher |
Springer |
publishDate |
2023 |
url |
https://oceanrep.geomar.de/id/eprint/59343/ https://oceanrep.geomar.de/id/eprint/59343/7/s10641-023-01482-2.pdf https://link.springer.com/article/10.1007/s10641-023-01482-2 https://doi.org/10.1007/s10641-023-01482-2 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_relation |
https://oceanrep.geomar.de/id/eprint/59343/7/s10641-023-01482-2.pdf Pauly, D., Froese, R. , Liang, C., Müller, J. and Sorensen, P. (2023) Post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency. Open Access Environmental Biology of Fishes, 106 . pp. 2031-2043. DOI 10.1007/s10641-023-01482-2 <https://doi.org/10.1007/s10641-023-01482-2>. doi:10.1007/s10641-023-01482-2 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s10641-023-01482-2 |
container_title |
Environmental Biology of Fishes |
container_volume |
106 |
container_issue |
11 |
container_start_page |
2031 |
op_container_end_page |
2043 |
_version_ |
1790600326158483456 |