Fish feeds supplemented with calcium-based buffering minerals decrease stomach acidity, increase the blood alkaline tide and cost more to digest

Goodrich, Harriet R.; Berry, Alex; Montgomery, Daniel W.; Davison, William; Wilson, Rod W.

doi:10.1038/s41598-022-22496-3

Cited by 7 publications

(3 citation statements)

References 56 publications

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“…We, therefore, interpret the rise in MȮ 2 and Vẇ at this time as the rst real SDA response, driven by the cost of HCl secretion, nutrient and ion absorption in the stomach, and associated systemic events (metabolic processing of absorbed nutrients, protein synthesis for growth, branchial base excretion). It is well established that SDA is a long-lasting event in salmonids (McCue, 2006), often not peaking until 6-20 h after a meal (Medland and Beamish 1985;Eliason et al 2007;Eliason et al 2008;Goodrich et al 2022). Therefore, we predict that if measurements were to be extended to these times, further substantial increases in MȮ 2 and Vẇ would be observed, especially once the food reaches the prime absorptive areas, the anterior intestine and pyloric caecae (Buddington and Diamond 1986;Wood and Bucking 2011).…”

Section: Respiratory and Ventilatory Responses To Feedingmentioning

confidence: 87%

The first direct measurements of ventilatory flow and oxygen utilization after exhaustive exercise and natural feeding in a teleost fish, Oncorhynchus mykiss

Eom

Wood

2023

Preprint

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A new “less invasive” device incorporating an ultrasonic flow probe and a divided chamber, but no stitching of membranes to the fish, was employed to make the first direct measurements of ventilatory flow rate (V̇w) and % O2 utilization (%U) in juvenile rainbow trout (37 g, 8ºC) after exhaustive exercise (10-min chasing) and natural voluntary feeding (2.72% body mass ration). Under resting conditions, the allometrically scaled V̇w (300 ml kg−1 min−1 for a 37-g trout = 147 ml kg−1 min−1 for a 236-g trout exhibiting the same mass-specific O2 consumption rate, ṀO2) and the convection requirement for O2 (CR = 4.13 L mmol−1) were considerably lower, and the %U (67%) was considerably higher than in previous studies using surgically attached masks or the Fick principle. After exhaustive exercise, V̇w and ṀO2 approximately doubled whereas frequency (fr) and %U barely changed, so increased ventilatory stroke volume (Vsv) was the most important contributor to increased ṀO2. CR declined slightly. Values gradually returned to control conditions after 2–3 h. After voluntary feeding, short-term increases in V̇w, Vsv and ṀO2 were comparable to those after exercise, and fr again did not change. However, %U increased so CR declined even more. The initial peaks in V̇w, Vsv and ṀO2, similar to those after exercise, were likely influenced by the excitement and exercise component of natural feeding. However, in contrast to post-exercise fish, post-prandial fish exhibited second peaks in these same parameters at 1–3 h after feeding, and %U increased further, surpassing 85%, reflecting the true “specific dynamic action” response. We conclude that respiration in trout is much more efficient than previously believed.

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Section: Respiratory and Ventilatory Responses To Feedingmentioning

confidence: 87%

The first direct measurements of ventilatory flow and oxygen utilization after exhaustive exercise and natural feeding in a teleost fish, Oncorhynchus mykiss

Eom

Wood

2023

Preprint

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“…Let f be the number of input features (eight features, after feature selection and one-hot encoding processes), and c be the total number of classes (nine classes). Each hidden layer has a number of neurons that were calculated in (11), (12), and ( 13).…”

Section: Multi-layer Perceptron Neural Network-based Modelingmentioning

confidence: 99%

“…It was causing the water to have a much higher acidity [10]. Acidity negatively affects the calcium balance in the fish [11]. The salinity of the water is not balanced with minerals and the fish's functioning system affects the feed conversion ratio (FCR) [12].…”

Section: Introductionmentioning

confidence: 99%

Improving the Water Quality Classification Model for Various Farms Using Features Based on Artificial Neural Network

Nuanmeesri,

Poomhiran,

Kadmateekarun

et al. 2023

TEM Journal

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Measuring and classifying the water quality is necessary to manage the appropriate water quality for various farms near the coast or affected by seawater. This research aimed to improve the water quality classification model for various farms using Multi-Layer Perceptron Neural Network-based multi-class Support Vector Machine. It also implements the Random Forest Feature Importance Selection to increase model accuracy. The class reduction technique decreases the probability of co-occurrence classes for various farms in overlapping water ecosystems. The result has shown that the dataset that applied the class reduction helped increase the model’s efficiency more than the feature selection technique. The models that applied the multi-class Support Vector Machine classifier are more accurate than the Softmax activation function classifier. The findings indicate that the model using Multi-Layer Perceptron Neural Network-based One-versus-One Support Vector Machine combined with the Random Forest Feature Importance Selection and the class reduction has the highest efficiency and improves the water quality classification model in various farms.

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Treatments for the control of Neoechinorhynchus buttnerae (Acanthocephala) in tambaqui Colossoma macropomum

et al. 2023

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Intensive sh farming with inadequate management can imbalance the sh-pathogen-environment relationship, culminating in diseases outbreaks. In the case of tambaqui Colossoma macropomum farming, it may be affected by acanthocephalosis, a parasitic infection without a speci c and safe treatment yet. The objective of this study was to evaluate the effect of the active ingredients in trichlorfon, albendazole, piperazine and ivermectin, as well as calcium hydroxide and diatomaceous earth incorporated to the feed, to control Neoechinorhynchus buttnerae (Acanthocephala) in tambaqui. A 63-day trial was conducted in a completely randomized experimental design, with 7 treatments, 3 replicates each and 54 sh per treatment. Fish were sampled for weight gain and parasite count on days 0, 15, 35, and 63. In general, the e cacy of anthelmintics was low in the treatment of N. buttnerae in tambaqui. Nevertheless, among the tested products, calcium hydroxide and diatomaceous earth showed promising results (48.17% and 36.44% e cacy, respectively), followed by ivermectin and piperazine (15.93% and 12.63%, respectively). Future studies are warranted to test longer drug administration periods, novel products, and diverse experimental conditions to treat N. buttnerae in tambaqui, to provide information to develop strategies for disease management.

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Fish feeds supplemented with calcium-based buffering minerals decrease stomach acidity, increase the blood alkaline tide and cost more to digest

Cited by 7 publications

References 56 publications

The first direct measurements of ventilatory flow and oxygen utilization after exhaustive exercise and natural feeding in a teleost fish, Oncorhynchus mykiss

The first direct measurements of ventilatory flow and oxygen utilization after exhaustive exercise and natural feeding in a teleost fish, Oncorhynchus mykiss

Improving the Water Quality Classification Model for Various Farms Using Features Based on Artificial Neural Network

Treatments for the control of Neoechinorhynchus buttnerae (Acanthocephala) in tambaqui Colossoma macropomum

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