The Interactive Effects of Exercise and Feeding on Oxygen Uptake, Activity Levels, and Gastric Processing in the Graceful Crab<i>Cancer gracilis</i>
Notice bibliographique
Résumé
Exercise and digestive processes are known to elevate the metabolic rate of organisms independently. In this study, the effects of simultaneous exercise and digestion were examined in the graceful crab Cancer gracilis. This species exhibited resting oxygen uptake levels between 29 and 42 mg O(2) kg(-1) h(-1). In postprandial crabs, oxygen uptake was approximately double that of unfed crabs. During exercise, oxygen uptake increased three- to fourfold, reaching maximal levels of more than 130 mg O(2) kg(-1 ) h(-1). However, there was no difference in oxygen uptake during activity between unfed and postprandial animals. There was also no difference in exercise endurance levels between unfed and postprandial animals; both sets of animals were unable to right themselves after being turned on their backs, reaching exhaustion after 13-15 attempts. To determine whether increased activity affected gastric processes, the passage of a meal through the digestive system was followed using a fluoroscope. Passage of digesta through the gut system was slower in active animals than in resting crabs. Resting crabs cleared the foregut after approximately 18 h, which was significantly faster than the 34.5 h for constantly active animals. Likewise, the midgut region of resting animals was cleared at a faster rate than that of active animals. Because of residual amounts of digesta remaining in the hindgut, no difference in clearance rates of this section of the gut was evident. The slower clearance times of the foregut were due to a significantly slower rate of mastication of food, as evidenced by a lower cardiac stomach contraction rate. Contraction of the pyloric region of the foregut functions to move the digesta along the midgut, and there was a direct correlation between slower contraction rates of this region and the increased time of passage for digesta through the midgut of active animals. Because increased activity levels affected gastric processing, the crabs exhibited a behavioral response. During a 24-h period after feeding, there was a significant reduction in locomotor activity. The findings of this study suggest a prioritization of metabolic responses toward activity at the expense of digestion. This is discussed in relation to the ability of the crabs to balance the demands of competing physiological systems.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».