Impact of Dietary Lipid to Carbohydrate Ratio on Elemental Stoichiometric Relationships in Growth Phenotypes of Ruditapes Decussatus
Understanding the mechanisms of nutrient regulation in bivalves is crucial for optimizing their growth under varying dietary conditions. In the present work, juveniles of the carpet shell clam (Ruditapes decussatus) from the same cohort were size-segregated to obtain fast and slow growing phenotypes...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-01-01
|
| Series: | Aquaculture Nutrition |
| Online Access: | http://dx.doi.org/10.1155/anu/9924742 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850270112418889728 |
|---|---|
| author | Kristina Arranz Iñaki Urrutxurtu Enrique Navarro |
| author_facet | Kristina Arranz Iñaki Urrutxurtu Enrique Navarro |
| author_sort | Kristina Arranz |
| collection | DOAJ |
| description | Understanding the mechanisms of nutrient regulation in bivalves is crucial for optimizing their growth under varying dietary conditions. In the present work, juveniles of the carpet shell clam (Ruditapes decussatus) from the same cohort were size-segregated to obtain fast and slow growing phenotypes. These clams were then conditioned to diets presenting a range of lipid/carbohydrate proportions but similar carbon:nitrogen (C:N) ratios. Subsequently, experiments were conducted to determine elemental (C and N) balances in order to achieve the following aims: (a) To identify strategies of homeostatic nutrient regulation in relation to either endogenous (growth phenotype) or dietary factors and (b) to quantify the extent to which stoichiometric adjustments (at both pre- and postabsorptive levels) are accomplished throughout the successive components of elemental balances. The elemental balances of both C and N exhibited higher values under the lipid-rich diets, indicating the presence of nutritional limitations in juvenile clams fed on low lipid/carbohydrate proportion, resulting from a greater digestive imbalance of lipids in diets of low digestibility coupled to limited dietary lipid income. These nutritional limitations were more effectively managed by the fast-growing phenotype, pointing to the importance of enhanced energetic status in sustaining homeostatic nutrient regulation. The stoichiometric coupling between consumed diets and the biosynthetic requirements of growing tissues relied on postabsorptive rather than preabsorptive mechanisms, although notable discrepancies in this regard were observed between conditioning diets. |
| format | Article |
| id | doaj-art-b4b92481052a4db28c86c07cf80315b3 |
| institution | OA Journals |
| issn | 1365-2095 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Aquaculture Nutrition |
| spelling | doaj-art-b4b92481052a4db28c86c07cf80315b32025-08-20T01:52:45ZengWileyAquaculture Nutrition1365-20952025-01-01202510.1155/anu/9924742Impact of Dietary Lipid to Carbohydrate Ratio on Elemental Stoichiometric Relationships in Growth Phenotypes of Ruditapes DecussatusKristina Arranz0Iñaki Urrutxurtu1Enrique Navarro2Department of GAFFADepartment of GAFFADepartment of GAFFAUnderstanding the mechanisms of nutrient regulation in bivalves is crucial for optimizing their growth under varying dietary conditions. In the present work, juveniles of the carpet shell clam (Ruditapes decussatus) from the same cohort were size-segregated to obtain fast and slow growing phenotypes. These clams were then conditioned to diets presenting a range of lipid/carbohydrate proportions but similar carbon:nitrogen (C:N) ratios. Subsequently, experiments were conducted to determine elemental (C and N) balances in order to achieve the following aims: (a) To identify strategies of homeostatic nutrient regulation in relation to either endogenous (growth phenotype) or dietary factors and (b) to quantify the extent to which stoichiometric adjustments (at both pre- and postabsorptive levels) are accomplished throughout the successive components of elemental balances. The elemental balances of both C and N exhibited higher values under the lipid-rich diets, indicating the presence of nutritional limitations in juvenile clams fed on low lipid/carbohydrate proportion, resulting from a greater digestive imbalance of lipids in diets of low digestibility coupled to limited dietary lipid income. These nutritional limitations were more effectively managed by the fast-growing phenotype, pointing to the importance of enhanced energetic status in sustaining homeostatic nutrient regulation. The stoichiometric coupling between consumed diets and the biosynthetic requirements of growing tissues relied on postabsorptive rather than preabsorptive mechanisms, although notable discrepancies in this regard were observed between conditioning diets.http://dx.doi.org/10.1155/anu/9924742 |
| spellingShingle | Kristina Arranz Iñaki Urrutxurtu Enrique Navarro Impact of Dietary Lipid to Carbohydrate Ratio on Elemental Stoichiometric Relationships in Growth Phenotypes of Ruditapes Decussatus Aquaculture Nutrition |
| title | Impact of Dietary Lipid to Carbohydrate Ratio on Elemental Stoichiometric Relationships in Growth Phenotypes of Ruditapes Decussatus |
| title_full | Impact of Dietary Lipid to Carbohydrate Ratio on Elemental Stoichiometric Relationships in Growth Phenotypes of Ruditapes Decussatus |
| title_fullStr | Impact of Dietary Lipid to Carbohydrate Ratio on Elemental Stoichiometric Relationships in Growth Phenotypes of Ruditapes Decussatus |
| title_full_unstemmed | Impact of Dietary Lipid to Carbohydrate Ratio on Elemental Stoichiometric Relationships in Growth Phenotypes of Ruditapes Decussatus |
| title_short | Impact of Dietary Lipid to Carbohydrate Ratio on Elemental Stoichiometric Relationships in Growth Phenotypes of Ruditapes Decussatus |
| title_sort | impact of dietary lipid to carbohydrate ratio on elemental stoichiometric relationships in growth phenotypes of ruditapes decussatus |
| url | http://dx.doi.org/10.1155/anu/9924742 |
| work_keys_str_mv | AT kristinaarranz impactofdietarylipidtocarbohydrateratioonelementalstoichiometricrelationshipsingrowthphenotypesofruditapesdecussatus AT inakiurrutxurtu impactofdietarylipidtocarbohydrateratioonelementalstoichiometricrelationshipsingrowthphenotypesofruditapesdecussatus AT enriquenavarro impactofdietarylipidtocarbohydrateratioonelementalstoichiometricrelationshipsingrowthphenotypesofruditapesdecussatus |