Allometric growth and development of organs in ballan wrasse (Labrus bergylta Ascanius, 1767) larvae in relation to different live prey diets and growth rates
Small fish larvae grow allometrically, but little is known about how this growth pattern may be affected by different growth rates and early diet quality. The present study investigates how different growth rates, caused by start-feeding with copepods or rotifers the first 30 days post-hatch (dph),...
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Online Access: | http://hdl.handle.net/11250/2434477 https://doi.org/10.1242/bio.017418 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2434477 2023-05-15T18:49:42+02:00 Allometric growth and development of organs in ballan wrasse (Labrus bergylta Ascanius, 1767) larvae in relation to different live prey diets and growth rates Kjørsvik, Elin Gagnat, Maren Ranheim Bardal, Tora Wold, Per-Arvid Øie, Gunvor 2016 http://hdl.handle.net/11250/2434477 https://doi.org/10.1242/bio.017418 eng eng Company of Biologists Biology Open. 2016, 5 (9), 1241-1251. urn:issn:2046-6390 http://hdl.handle.net/11250/2434477 https://doi.org/10.1242/bio.017418 cristin:1384317 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 1241-1251 5 Biology Open 9 Journal article Peer reviewed 2016 ftntnutrondheimi https://doi.org/10.1242/bio.017418 2019-09-17T06:52:07Z Small fish larvae grow allometrically, but little is known about how this growth pattern may be affected by different growth rates and early diet quality. The present study investigates how different growth rates, caused by start-feeding with copepods or rotifers the first 30 days post-hatch (dph), affect allometric growth and development of nine major organs in ballan wrasse (Labrus bergylta) larvae up to experimental end at 60 dph. Feeding with cultivated copepod nauplii led to both increased larval somatic growth and faster development and growth of organ systems than feeding with rotifers. Of the organs studied, the digestive and respiratory organs increased the most in size between 4 and 8 dph, having a daily specific growth rate (SGR) between 30 and 40% in larvae fed copepods compared with 20% or less for rotifer-fed larvae. Muscle growth was prioritised from flexion stage and onwards, with a daily SGR close to 30% between 21 and 33 dph regardless of treatment. All larvae demonstrated a positive linear correlation between larval standard length (SL) and increase in total tissue volume, and no difference in allometric growth pattern was found between the larval treatments. A change from positive allometric to isometric growth was observed at a SL close to 6.0 mm, a sign associated with the start of metamorphosis. This was also where the larvae reached postflexion stage, and was accompanied by a change in growth pattern for most of the major organ systems. The first sign of a developing hepatopancreas was, however, first observed in the largest larva (17.4 mm SL, 55 dph), indicating that the metamorphosis in ballan wrasse is a gradual process lasting from 6.0 to at least 15-17 mm SL. This is an Open Access article distributed under the terms of the Creative Commons AttributionLicense (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use,distribution and reproduction in any medium provided that the original work is properly attributed. Article in Journal/Newspaper Copepods Rotifer NTNU Open Archive (Norwegian University of Science and Technology) Ballan ENVELOPE(12.203,12.203,65.945,65.945) Biology Open 5 9 1241 1251 |
institution |
Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
Small fish larvae grow allometrically, but little is known about how this growth pattern may be affected by different growth rates and early diet quality. The present study investigates how different growth rates, caused by start-feeding with copepods or rotifers the first 30 days post-hatch (dph), affect allometric growth and development of nine major organs in ballan wrasse (Labrus bergylta) larvae up to experimental end at 60 dph. Feeding with cultivated copepod nauplii led to both increased larval somatic growth and faster development and growth of organ systems than feeding with rotifers. Of the organs studied, the digestive and respiratory organs increased the most in size between 4 and 8 dph, having a daily specific growth rate (SGR) between 30 and 40% in larvae fed copepods compared with 20% or less for rotifer-fed larvae. Muscle growth was prioritised from flexion stage and onwards, with a daily SGR close to 30% between 21 and 33 dph regardless of treatment. All larvae demonstrated a positive linear correlation between larval standard length (SL) and increase in total tissue volume, and no difference in allometric growth pattern was found between the larval treatments. A change from positive allometric to isometric growth was observed at a SL close to 6.0 mm, a sign associated with the start of metamorphosis. This was also where the larvae reached postflexion stage, and was accompanied by a change in growth pattern for most of the major organ systems. The first sign of a developing hepatopancreas was, however, first observed in the largest larva (17.4 mm SL, 55 dph), indicating that the metamorphosis in ballan wrasse is a gradual process lasting from 6.0 to at least 15-17 mm SL. This is an Open Access article distributed under the terms of the Creative Commons AttributionLicense (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use,distribution and reproduction in any medium provided that the original work is properly attributed. |
format |
Article in Journal/Newspaper |
author |
Kjørsvik, Elin Gagnat, Maren Ranheim Bardal, Tora Wold, Per-Arvid Øie, Gunvor |
spellingShingle |
Kjørsvik, Elin Gagnat, Maren Ranheim Bardal, Tora Wold, Per-Arvid Øie, Gunvor Allometric growth and development of organs in ballan wrasse (Labrus bergylta Ascanius, 1767) larvae in relation to different live prey diets and growth rates |
author_facet |
Kjørsvik, Elin Gagnat, Maren Ranheim Bardal, Tora Wold, Per-Arvid Øie, Gunvor |
author_sort |
Kjørsvik, Elin |
title |
Allometric growth and development of organs in ballan wrasse (Labrus bergylta Ascanius, 1767) larvae in relation to different live prey diets and growth rates |
title_short |
Allometric growth and development of organs in ballan wrasse (Labrus bergylta Ascanius, 1767) larvae in relation to different live prey diets and growth rates |
title_full |
Allometric growth and development of organs in ballan wrasse (Labrus bergylta Ascanius, 1767) larvae in relation to different live prey diets and growth rates |
title_fullStr |
Allometric growth and development of organs in ballan wrasse (Labrus bergylta Ascanius, 1767) larvae in relation to different live prey diets and growth rates |
title_full_unstemmed |
Allometric growth and development of organs in ballan wrasse (Labrus bergylta Ascanius, 1767) larvae in relation to different live prey diets and growth rates |
title_sort |
allometric growth and development of organs in ballan wrasse (labrus bergylta ascanius, 1767) larvae in relation to different live prey diets and growth rates |
publisher |
Company of Biologists |
publishDate |
2016 |
url |
http://hdl.handle.net/11250/2434477 https://doi.org/10.1242/bio.017418 |
long_lat |
ENVELOPE(12.203,12.203,65.945,65.945) |
geographic |
Ballan |
geographic_facet |
Ballan |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_source |
1241-1251 5 Biology Open 9 |
op_relation |
Biology Open. 2016, 5 (9), 1241-1251. urn:issn:2046-6390 http://hdl.handle.net/11250/2434477 https://doi.org/10.1242/bio.017418 cristin:1384317 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1242/bio.017418 |
container_title |
Biology Open |
container_volume |
5 |
container_issue |
9 |
container_start_page |
1241 |
op_container_end_page |
1251 |
_version_ |
1766243303122010112 |