The development of functional digestive and metabolic organs in turbot, Scophthalmus maximus
The functional status of organ systems involved into the processing of exogenous food is critical for the survival and growth of fish early life stages. The present study on laboratory-reared larval turbot, Scophthalmus maximus, provides an overview on the ontogeny of structure and functions involve...
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1994
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ftufz:oai:ufz.de:20496 2023-12-10T09:53:25+01:00 The development of functional digestive and metabolic organs in turbot, Scophthalmus maximus Segner, H. Storch, V. Reinecke, M. Kloas, W. 1994 application/pdf https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=20496 https://doi.org/10.1007/BF00347544 en eng Springer Marine Biology 119 (3);; 471 - 486 https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=20496 https://dx.doi.org/10.1007/BF00347544 info:eu-repo/semantics/closedAccess ISSN: 0025-3162 Early Life Stage Gastric Gland Liver Parenchymal Cell Exogenous Feeding Larval Muscle info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text 1994 ftufz https://doi.org/10.1007/BF00347544 2023-11-12T23:35:00Z The functional status of organ systems involved into the processing of exogenous food is critical for the survival and growth of fish early life stages. The present study on laboratory-reared larval turbot, Scophthalmus maximus, provides an overview on the ontogeny of structure and functions involved in digestion, absorption and metabolism of nutrients. At start of exogenous feeding the intestine of larval turbot is anatomically differentiated, with enterocytes displaying an adult-type ultrastructure and being able to process lipids. At the microvillous border of the enterocytes, enzymes of contact digestion such as aminopeptidase are found. The ultrastructure of the exocrine pancreatic cells is fully differentiated from hatching onwards. Likewise, substantial activities of trypsin-type proteases are present. A stomach anlage exists in first-feeding larvae; however, the stomach becomes functional (appearance of gastric glands and pepsin secretion) only during metamorphosis. Liver parenchymal cells already display a functional ultrastructure during the endotrophic phase; with onset of exogenous feeding they develop pronounced diet-related changes of their energy stores. Larval respiration is not executed by the gills since respiratory surface of these structures develops only towards metamorphosis. The energy generation of larval muscle tissue depends on aerobic metabolism, whereas glycolytic activities start to increase at metamorphosis. In conclusion, two important patterns can be recognized in the development of turbot larvae: (1) The structure/function is differentiated at hatching or at the onset of exogenous feeding (afterwards it experiences mainly quantitative but not qualitative growth, i.e., intestine, exocrine pancreas, liver); or (2) the structure/function is absent in larvae and develops only during metamorphosis (i.e., gills, glycolytic muscle metabolism, stomach). Article in Journal/Newspaper Scophthalmus maximus Turbot UFZ - Publication Index (Helmholtz-Centre for Environmental Research) Marine Biology 119 3 471 486 |
institution |
Open Polar |
collection |
UFZ - Publication Index (Helmholtz-Centre for Environmental Research) |
op_collection_id |
ftufz |
language |
English |
topic |
Early Life Stage Gastric Gland Liver Parenchymal Cell Exogenous Feeding Larval Muscle |
spellingShingle |
Early Life Stage Gastric Gland Liver Parenchymal Cell Exogenous Feeding Larval Muscle Segner, H. Storch, V. Reinecke, M. Kloas, W. The development of functional digestive and metabolic organs in turbot, Scophthalmus maximus |
topic_facet |
Early Life Stage Gastric Gland Liver Parenchymal Cell Exogenous Feeding Larval Muscle |
description |
The functional status of organ systems involved into the processing of exogenous food is critical for the survival and growth of fish early life stages. The present study on laboratory-reared larval turbot, Scophthalmus maximus, provides an overview on the ontogeny of structure and functions involved in digestion, absorption and metabolism of nutrients. At start of exogenous feeding the intestine of larval turbot is anatomically differentiated, with enterocytes displaying an adult-type ultrastructure and being able to process lipids. At the microvillous border of the enterocytes, enzymes of contact digestion such as aminopeptidase are found. The ultrastructure of the exocrine pancreatic cells is fully differentiated from hatching onwards. Likewise, substantial activities of trypsin-type proteases are present. A stomach anlage exists in first-feeding larvae; however, the stomach becomes functional (appearance of gastric glands and pepsin secretion) only during metamorphosis. Liver parenchymal cells already display a functional ultrastructure during the endotrophic phase; with onset of exogenous feeding they develop pronounced diet-related changes of their energy stores. Larval respiration is not executed by the gills since respiratory surface of these structures develops only towards metamorphosis. The energy generation of larval muscle tissue depends on aerobic metabolism, whereas glycolytic activities start to increase at metamorphosis. In conclusion, two important patterns can be recognized in the development of turbot larvae: (1) The structure/function is differentiated at hatching or at the onset of exogenous feeding (afterwards it experiences mainly quantitative but not qualitative growth, i.e., intestine, exocrine pancreas, liver); or (2) the structure/function is absent in larvae and develops only during metamorphosis (i.e., gills, glycolytic muscle metabolism, stomach). |
format |
Article in Journal/Newspaper |
author |
Segner, H. Storch, V. Reinecke, M. Kloas, W. |
author_facet |
Segner, H. Storch, V. Reinecke, M. Kloas, W. |
author_sort |
Segner, H. |
title |
The development of functional digestive and metabolic organs in turbot, Scophthalmus maximus |
title_short |
The development of functional digestive and metabolic organs in turbot, Scophthalmus maximus |
title_full |
The development of functional digestive and metabolic organs in turbot, Scophthalmus maximus |
title_fullStr |
The development of functional digestive and metabolic organs in turbot, Scophthalmus maximus |
title_full_unstemmed |
The development of functional digestive and metabolic organs in turbot, Scophthalmus maximus |
title_sort |
development of functional digestive and metabolic organs in turbot, scophthalmus maximus |
publisher |
Springer |
publishDate |
1994 |
url |
https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=20496 https://doi.org/10.1007/BF00347544 |
genre |
Scophthalmus maximus Turbot |
genre_facet |
Scophthalmus maximus Turbot |
op_source |
ISSN: 0025-3162 |
op_relation |
https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=20496 https://dx.doi.org/10.1007/BF00347544 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/BF00347544 |
container_title |
Marine Biology |
container_volume |
119 |
container_issue |
3 |
container_start_page |
471 |
op_container_end_page |
486 |
_version_ |
1784900321900756992 |