AU2014257626A1 - Method for improving mineral resorption in farmed fish and crustacean - Google Patents

Method for improving mineral resorption in farmed fish and crustacean Download PDF

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AU2014257626A1
AU2014257626A1 AU2014257626A AU2014257626A AU2014257626A1 AU 2014257626 A1 AU2014257626 A1 AU 2014257626A1 AU 2014257626 A AU2014257626 A AU 2014257626A AU 2014257626 A AU2014257626 A AU 2014257626A AU 2014257626 A1 AU2014257626 A1 AU 2014257626A1
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feed
fishes
crustaceans
dihydroxyvitamin
fish
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Robert Aebi
Heinrich Bachmann
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Herbonis AG
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    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K50/00Feeding-stuffs specially adapted for particular animals
    • A23K50/80Feeding-stuffs specially adapted for particular animals for aquatic animals, e.g. fish, crustaceans or molluscs
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K10/00Animal feeding-stuffs
    • A23K10/20Animal feeding-stuffs from material of animal origin
    • A23K10/22Animal feeding-stuffs from material of animal origin from fish
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K10/00Animal feeding-stuffs
    • A23K10/30Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K20/00Accessory food factors for animal feeding-stuffs
    • A23K20/10Organic substances
    • A23K20/142Amino acids; Derivatives thereof
    • A23K20/147Polymeric derivatives, e.g. peptides or proteins
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K20/00Accessory food factors for animal feeding-stuffs
    • A23K20/10Organic substances
    • A23K20/158Fatty acids; Fats; Products containing oils or fats
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K20/00Accessory food factors for animal feeding-stuffs
    • A23K20/10Organic substances
    • A23K20/174Vitamins
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K20/00Accessory food factors for animal feeding-stuffs
    • A23K20/10Organic substances
    • A23K20/189Enzymes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81Aquaculture, e.g. of fish
    • Y02A40/818Alternative feeds for fish, e.g. in aquacultures

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Husbandry (AREA)
  • Zoology (AREA)
  • Food Science & Technology (AREA)
  • Physiology (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Health & Medical Sciences (AREA)
  • Biotechnology (AREA)
  • Molecular Biology (AREA)
  • Botany (AREA)
  • Mycology (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Insects & Arthropods (AREA)
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  • Biomedical Technology (AREA)
  • Feed For Specific Animals (AREA)
  • Fodder In General (AREA)
  • Coloring Foods And Improving Nutritive Qualities (AREA)

Abstract

One uses advantageously, as feed, feed component or feed additive a composition comprising an efficient amount of vitamin D metabolites or any source of same for improving or enhancing resorption of minerals, especially phosphor and calcium in farmed fishes and crustaceans. One further provides mean enabling a substantial reduction of phosphor pollution in aquaculture when feeding fishes and crustaceans by means of a dedicated feed having reduced phosphor content and supplemented in the same time with such a feed, feed component or feed additive.

Description

WO 2014/173862 1 PCT/EP2014/058057 Method for improving mineral resorption in farmed fish and crustacean 5 Field of the Invention The invention relates generally to the field of fish and crustacean farming, in particular 10 to specific feed components or additives suitable to feed fishes or crustaceans. More specifically the invention relates to means useful for improving mineral resorption in fishes and crustaceans. 15 Background of the Invention Supplying the growing world population with food is highly challenging. One of the most valuable nutritive components is protein which comes typically from meat of land animals but also from fish. Consumption of fish and crustacean is a meat source since 20 prehistoric times. However, in the last decades, ocean fishing came to a critical point in which over-fishing reduced catches of many marine species such as sardines, tuna and herring. Also, modem fishery practices destroy the ocean floor and this impairs hatching ground for many marine animals. 25 Fish farming is therefore a suitable alternative to ocean fishing. So, for example salmons have the best feed conversion ratio (FCR) of all farmed animals However, fish and crustacean aquaculture has also its shortcomings, which needs to be overcome in order to make aquaculture sustainable: 30 1. Stocking density as a cause of stress and growth anomalies 2. Over fertilization of coastal areas caused by excreta and wasted feed 3. The use of fish meal and fish oil as feed components WO 2014/173862 2 PCT/EP2014/058057 Such draw-backs are recognized by the industry and intensive research is ongoing to improve the situation and make aquaculture more sustainable. One of the proposed strategies consists to replace the use of fish meal and oil by raw material of plant origin and to correct eventual imbalances. Another strategy is to find additives which would induce a better use of other 5 nutrients. In addition, fishes and crustaceans in aquaculture do not have access to the natural feed components in marine or freshwater environment like essential nutrients e. g. vitamins from plankton. On the other hand freshwater and seawater contain some minerals in sufficient 10 amounts but are deficient in others like e.g. phosphorus. In contrast to calcium phosphorus is a growth-limiting nutrient for aquatic animals and must be supplemented by feed. Phosphorus is together with calcium a main component of bone and scales in fish, but also in the exoskeleton of crustaceans. In addition, phosphorus is an 15 essential element in muscle function. It is therefore of high interest to find methods which help to make an efficient use of such nutrients and not to waste it in the environment. 20 The invention obviates adequately all the obstacles still met in fish and crustacean farming and responds adequately to an obvious unmet need in aquaculture. The present invention relates, in particular, to a method which improves calcium and phosphorus uptake in teleost fishes and crustaceans and that improves growth and animal 25 body composition and that yields better meat quality. This allows an easy and profitable reduction in such components in the feed whereas it still allows achieving the desired performance. The invention is defined in the claims appearing here below. 30 WO 2014/173862 3 PCT/EP2014/058057 Summary of the Invention A first objet of the invention is a composition for use in improving or enhancing resorption of minerals in fishes and crustaceans which comprises as an active ingredient 5 Vitamin D metabolites or any source of same. Another object of the invention is a feed or a feed material useful for improving or enhancing resorption of minerals in fishes and crustaceans which comprises as active ingredient Vitamin D metabolites or any source of same in combination with a source of 10 carbohydrates, a source of lipids and a source of proteins. Still another object of the invention is a feed additive useful for improving or enhancing resorption of minerals in fishes and crustaceans which comprises as an active ingredient Vitamin D metabolites or any source of same. 15 Still another object of the invention is a method for reducing phosphorus pollution in aquaculture, especially in fish and crustacean farming which comprises feeding said fishes and crustaceans by means of a feed or a feed material mentioned here above. 20 Additional objects of the invention shall appear in the specification below. Detailed description of the Invention 25 According to the invention the terms "Vitamin D metabolites" mean either 25 Hydroxyvitamin D3 (Calcidiol, CAS number: 19356-17-3) , 25-Hydroxyvitamin D2; 1,25 Dihydroxyvitamin D3 (Calcitriol, CAS 32222-06-3) , 1,25-Dihydroxyvitamin D2; 1-a Hydroxy-cholecalciferol , 1-a-Hydroxyergosterol or 1,25-Dihydroxyvitamin D3-glycosides whereas the term "glycosides" defines glucoside, fructoside, galactoside units or any hexose 30 and pentose unit bound to the aglycon. 1,25-Dihydroxyvitamin D3-glycosides represent one of the preferred Vitamin D metabolites used within the frame of the invention. According to the invention the terms "source of Vitamin D metabolites" comprise preparations or part of plants, and namely leaves, obtained from plants like Solanum WO 2014/173862 PCT/EP2014/058057 glaucophyllum, Cestrum diurnum, Trisetum flavescens and Nierembergia veitchii. That list, however, is not limitative. According to the invention said vitamin D metabolites can be applied alone, i.e. as unique 5 vitamin entity or in addition to regular vitamin D whereby the addition to regular Vitamin D3 represents the preferred application. According to the invention the term "fish" comprise any species suitable to farming or aquaculture and in particular marine fishes such as Atlantic salmon, milkfish, halibut, Atlantic 10 cod, Pacific salmon, turbot, sole, sea bass, finfish and eels as well as freshwater fishes like trout e.g. rainbow trout, carps, tilapia, catfish, pangasius and bream. According to the invention the term "crustaceans" comprise any species suitable to farming or aquaculture, ant in particular marine shrimps and prawns like e.g. tiger prawns and fresh 15 water prawns, crabs and crayfish. According to the invention the term "mineral" includes phosphorus, calcium and magnesium; phosphorus is first of all of concern within the frame of this invention as being a major source of pollution in fish farming. 20 According to the invention the terms "mineral resorption" means intestinal resorption or resorption through the scales (fishes) or through the shell (crustaceans). According to the invention Solanum glaucophyllum plant material represents a preferred 25 source of Vitamin D3 metabolites, especially of 1,25-dihydroxyvitamin D3-glycosides. This plant material is provided either from wild or from cultivated plants or hybrids of same like e.g. "HERVIT@" according to Plant Variety Certificate EU 25473. As plant material one can use either dried leaves of said plant or any water extract of same, 30 any water/alcohol extract of same or any enriched and purified water/alcohol extract of same (see examples below). According to the invention 1,25-dihydroxyvitamin D3-glycosides are provided to the fish and crustacean in their feed at a daily dose of about 0.1 gg to about 100 gg of 1,25- WO 2014/173862 5 PCT/EP2014/058057 dihydroxyvitamin D3-glycosides per kg fish feed or crustacean feed, a dose which is usually expressed analytically as gg of 1,25-dihydroxyvitamin D3. One uses preferably from about 0.2 to about 20 gg 1,25-dihydroxyvitamin D3-glycosides per 5 kg of feed material and still more preferably form about 0.5 to about 10 gg 1,25 dihydroxyvitamin D3-glycosides per kg of feed material. The vitamin D metabolites can be incorporated to any feed material or component dedicated to any state of development of fish and crustacean. 10 Such feed or feed material can further comprise from about 25gg to about 75 gg regular (synthetic) Vitamin D, e.g. (synthetic) Vitamin D3 per kg feed or feed material. When applying 1,25-dihydroxyvitamin D3-glycosides in accordance with the provisions here above, and in particular when performing the application of a single dose of 1,25 15 dihydroxyvitamin D3-glycosides - e.g. provided as water soluble extract of Solanum glaucophyllum according to W02009/129818) - or of synthetic 1,25-dihydroxyvitamin D3, 25-hydroxyvitamin D3 or of 1-a-hydroxyvitamin D3 to adult Atlantic salmons one observes increased blood levels of 1,25-dihydroxyvitamin D3. When comparing the above mentioned fishes to untreated control subjects one also observes a substantial increased uptake of 20 calcium and phosphorus from the standard feed provided to the said fishes. According to another series of test performed with juvenile Atlantic salmon and making use of 1,25-dihydroxyvitamin D3-glycosides in the form of a water soluble extract of Solanum glaucophyllum (see above) on observes, after 30 days of feeding, a definite better growth rate, 25 a better feed conversion and lower bone and scales deformations or distortions. Similar results have been achieved when using Panbonis@ 10 as an alternative source of 1,25 dihydroxyvitamin D3-glycosides. According to another object the invention one can decrease advantageously the phosphorus 30 content in the feed or the feed component used in aquaculture when reducing the initial standard and generally recommended proportion for a given species and stage of development by 10 to 50 % of said initial proportion while adding thereto an efficient amount of Vitamin D3 metabolites referred to here above and while still achieving the same end performance, i.e. growth rate, meat and bone quality.
WO 2014/173862 6 PCT/EP2014/058057 For example feeding adult Atlantic salmon with different doses of 1,25-dihydroxyvitamin D3 glycosides - provided as an extract of Solanum glaucophyllum (see above) - to diets with graded reductions of added feed phosphorus over 60 days resulted in a better growth rate, a 5 better feed conversion and less phosphorus in excreta when compared to a non-phosphorus reduced control group. Similar results have been achieved by using a combination of Panbonis@ 10 together with a feed having reduced phosphorus content as compared to a control group where phosphorus content of their diet was not reduced. 10 Thus, by means of the invention, one can advantageously reduce the phosphorus pollution in aquaculture, especially in fish and crustacean farming when feeding said fishes and crustaceans by means of a feed or feed additive mentioned here above. When feeding adult Atlantic salmon with different doses of 1,25-dihydroxyvitamin D3 15 glycosides- provided as an extract of Solanum glaucophyllum (see above) - to diets with graded reduction of added fish meal and fish oil and by replacing same with plant proteins and plant oils one observes, nevertheless, the same growth performance than that of the non reduced control group. 20 Similar results have been achieved when using Panbonis@ 10 as an alternative source of 1,25-dihydroxyvitamin D3-glycosides to a feed material in which a fraction of fish meal and of fish oil was replaced by plant proteins and vegetal oils, when compared to non-replaced control feed material. 25 When fishes or crustaceans are fed according to the invention one observes a definite improvement of their well-being which is reflected, in particular, in the quality of their meat and their bone and scales health and, also, in their growth rate and their feed conversion ratio. One could also improve substantially the growth rate and reduce at the same tome the bone 30 deformation in farmed fishes and crustaceans by means of a feed or feed material or feed additive as referred to here above. Consequently the invention further provides a method for improving growth rate and well being of farmed fishes and crustaceans when a part of fish meal and fish oil is replaced by WO 2014/173862 PCT/EP2014/058057 vegetable proteins and oils by means of a feed or feed additive referred to here above. Following such a way one is today able to correct efficiently potential imbalances which would be caused by these feed substitutions. 5 The invention still further provides a method for improving growth rate and well-being of farmed fishes and crustaceans when a part of fish meal and fish oil is replaced by vegetable proteins and vegetal oils and supplemented at the same time with a feed or feed additive mentioned here above and in combination with the use of phytase enzymes when anti-nutrient phytic acid is present in said vegetable oils and proteins. 10 The incorporation of selected Vitamin D3 metabolites, especially of 1,25-dihydroxyvitamin D3 glycosides, is performed according to the techniques usually applied in this field for producing pellets or crumbles or similar feed material, namely extrusion, coating, spraying, etc. The selected metabolites are primarily mixed with the carbohydrates, a first portion of 15 lipids and the proteins and then subjected to extrusion to afford granule or pellet cores of A protective coating made of the second portion of selected lipids is then sprayed onto the cores to provide the ready to use pellets. 20 Examples Preparation of a Solanum glaucophyllum plant extract A selected batch of dry leaves of Solanum glaucophyllum has been macerated under agitation 25 at 40 - 60 'C for about 24 hours with the 5 to 12 liter per kg of a water/ethanol mixture. Previous analytical assessment of the content in 1,25-dihydroxyvitamin D3-glycosides of various batches of dry leaves material available in the storehouse led to prepare an 85/15 in volume water / ethanol mixture. The use of the proper mixture allows the achievement of the 30 desired content of vitamin D3 derivative - approx. 100 ppm in this example. The liquid fraction was separated and set aside whereas maceration was repeated for a second turn of 24 hours.
WO 2014/173862 8 PCT/EP2014/058057 The collected water / ethanol extracts were then combined and added with ascorbic acid in a ratio of 0.25 % by weight and pH of same was adjusted to 5 - 6.5 by means of a food compatible acid, citric acid in this particular case. 5 The stabilized extract was then filtered and concentrated to approx. 30 to 50 % of dry matter content by means of vacuum drying technique and the resulting concentrated was poured onto a cationic exchanger resin equilibrated in its HV form. The collected effluent was filtered and then subjected to UHT sterilization (1250 C for 1 min). 10 After analytically assessment of the 1,25-dihydroxyvitamin D 3 -glycosides content, a specific amount of excipient, preferable maltodextrin, lactose or corn starch, is added the sterilized material in order to standardize the final content of active ingredients in the plant extract 100 ppm of 1,25 -dihydroxyvitamin D3 -glycosides. 15 The standardized mixture is eventually spray dried or vacuum dried in a conventional spray drier to afford the desired Solanum glaucophyllum plant extract in powder form. Alternatively Solanum glaucophyllum plant material can be subjected to an extraction by percolation with the water / ethanol solvent mix referred to above followed by the addition of 20 stabilizing additives like e.g. ascorbic acid and pH adjustment, before subsequent UHT treatment and drying (vacuum drying or spray drying). Preparation of a feed component (or feed additive): Panbonis® 10 25 Wheat middling (excipient) is intimately milled with dried leaves of Solanum glaucophyllum and then processed until obtaining a homogeneous powdered material. The inactive excipient is added to the dried leaves in order to obtain a standardized product comprising 0.001 % (weight) of 1,25-dihydroxyvitamin D3-glycosides (measured analytically as "active Vitamin 30 D3" i.e. as 1,25-dihydroxyvitamin D3 or, expressed differently, as 1,25(OH)2 D3); Panbonis@ 10 is more conveniently characterized here below as comprising 10 gg 1,25 dihydroxyvitamin D3 / kg.
WO 2014/173862 PCT/EP2014/058057 The analytical content of the excipient may vary according to the following range: 8 - 12 % (weight) of crude fibers, 14-25 % (weight) of starch. The mill processing is set in order to afford a particle size distribution comprised between ca. 50 and ca. 1000 gm. 5 Fish feeding experiments Experiment no 1 To a total of 116 brown trout (Salmo Salar) having each a body weight extending from 250 g 10 to 500 g to which was periodically provided a commercial grower feed (crude protein: 46%; crude fat 12%; carbohydrate 2 0%; crude fibers 3 %; ash 9 %; calcium ".0%; P 1.5%; vitamin A 50001U/kg; vitamin D3 2500 IU/kg) and moving in separate tanks, one gave to each of same one capsule containing 1.75 gg/kg bodyweight of 1,25-Dihydroxyvitamin D3. At different times the fishes were anesthetized and blood was withdrawn from them, serum samples were 15 prepared and submitted to analytical quantification of 1,25-Dihydroxyvitamin D3, calcium and phosphorus. Table 1: Serum 1,25(OH)2D3, calcium and phosphor values Blood Time Time Time Time Time parameter 0 hrs. 12 hrs. 24 hrs. 48 hrs. 72 hrs. 1,25(OH)2D3 [pg/ml] 51 246 1254 391 72 Ca [mmol/L] 3.06 2.53 2.41 2.38 2.59 P [mmol/L] 3.18 3.18 3.70 4.24 4.48 20 One observes a blood serum increase of 1,25(OH)2 D3 with a peak concentration at 24 hours followed by a progressive decrease down to the pretreatment level. A slight increase in calcium and phosphorus levels can only be seen 48 hours after administration. 25 WO 2014/173862 10 PCT/EP2014/058057 Experiment no 2 Thirty-five juvenile rainbow trout (Oncorhynchus mykiss) having an average body weight of 19 gram were kept per tank in 4 replicates per treatment. The duration of the feeding 5 experiment extended over 73 days at a water temperature of 14'C. Fishes were fed once per day to apparent satiation with a diet according to Table 2. Panbonis@ 10 was used as the source of 1,25(OH)2 D3, in a ratio of 200 mg/kg diet, respectively of 1000 mg/kg diet. Table 2: Composition of the diet of Experiment 2 10 Raw materials (0 Control Panbonis- 1 Panbonis-2 Fish meal 10010010.0 Wheat flour 12.0 12.0 12.0 Vegetable protein 67.8 67.8 67.8 Fish meal 10.0 0 10.0 Vitamin premix 0.4 0.4 0.4 Mineral premix 6.0 6.0 6.0 Cellulose powder 1.0 1.0 0.9 Panbonis® 10- 0.020 0.100 Fish oil 3.0 3.0 3.0 Total 100 100 100 Table 3: Result providing by the parameters applied in Experiment 2 Indices Control Panbonis- 1 Panbonis-2 Fish meal (%) 10 10 10 Initial fish number 35 35 35 Starting biomass (g) 674 668 666 Average body weight (g) 19.2 ± 1.5 19.1 ± 1.4 19.0 1 .3 Final biomass (g) 2,036 2,134 2,179 Average body weight (g) 58.2+12.9 61.0+13.5 62.2+15.6 Survival rate (%) 100 100 100 Weight gain (g) 1,362 1,466 1,512 WO 2014/173862 11 PCT/EP2014/058057 Average weight gain (%) 302 319 327 Serum analysis Control Panbonis-1 Panbonis-2 Panbonis@ 10 (%) ---- 0.020 0.100 1,25(OH)2 D3 ( ig/ml)* 89.2+15.0 102.3+2.8 133.1+31.2 * Serum samples collected from 3 fishes were mixed to one specimen for the detection of 1,25(OH)2 D3. On observes a dose-dependent increase in average weight gain as result of the addition of the 1,25-Dihydroxyvitamin D3-glycosides provided by the various dosages of Panbonis@ 10 The increase of serum concentration inl,25-Dihydroxyvitamin D3-glycosides - measured as 5 1,25(OH)2 D3 - was also dose-dependent. The survival rate of the fishes was 100%. Experiment no 3 10 Thirty-five juvenile rainbow trout (Oncorhynchus mykiss) of an average body weight of 28 gram were spread over 6 tanks during the whole treatment. Duration of the feeding experiment was 32 days at a water temperature of 14'C. Fish were fed once per day to apparent satiation with a diet as shown in Table 4. Panbonis was used as test article in a concentration of 0.1, 0.2, 1.0, 5.0 and 10 g/kg diet. 15 Table 4: Composition of the diet of Experiment 3 Raw Materials (%) Control Panbonis Panbonis Panbonis Panbonis Panbonis 0.lg/kg 0.2g/kg 1.Og/kg 5.0g/kg l0g/kg Wheat flour 16.64 16.64 16.64 16.64 16.64 16.64 Vegetable protein 44 44 44 44 44 44 Fish meal 25 25 25 25 25 25 Vitamin premix 0.72 0.72 0.72 0.72 0.72 0.72 Mineral premix 1.2 1.2 1.2 1.2 1.2 1.2 Others 4.94 4.94 4.94 4.94 4.94 4.94 Defatted rice bran 1 0.99 0.98 0.9 0.5 0 WO 2014/173862 12 PCT/EP2014/058057 Panbonis@ 10 0 0.01 0.02 0.1 0.5 1 Fish oil 6.5 6.5 6.5 6.5 6.5 6.5 Total 100 100 100 100 100 100 Table 5: Results of Experiment 3 Indicators Control Panbonis Panbonis Panbonis Panbonis Panbonis 0.lg/kg 0.2g/kg 1.Og/kg 5.0g/kg lOg/kg Fish meal(%) 25 25 25 25 25 25 Start biomass (g) 663 658 663 662 662 663 Aver. body weight (g) 28.8 2.6 28.6 2.3 28.8 2.8 28.8 2.2 28.8 2.6 28.8 2.6 Final Biomass (g) 1,260 1,248 1,304 1,494 1,410 1,301 Aver. body weight O(g) 54.8 ± 6.8a 54.3 56.7 65.0 61.3 56.6 7.6a 5.6a 7 .0 5 .5 6.0a Survival rate (%) 100 100 100 100 100 100 Weight gain (g) 597 590 642 832 749 638 Aver. weight gain (%) 190 190 197 226 213 198 Ca content (g/fish) 0.42 0.39 0.43 0.54 0.46 0.44 P content (g/fish) 0.42 0.4 0.42 0.56 0.49 0.43 5 As result of this short term experiment it one observes a similar outcome than that of Experiment 2 in terms of growth performance. The trial shows an increased response for calcium & phosphor deposition in the fish. 10 The optimal dose was found at 1 gram Panbonis@ 10 per kg of diet, what corresponds to 10 gg 1,25-Dihydroxyvitamin D3-glycosides per kg of fish diet. Experiment no 4 (fish meal reduction experiment) 15 Forty juvenile rainbow trout (Oncorhynchus mykiss) having an average body weight of 26 grams in average were kept per tank in 6 replicates per treatment. The feeding experiment WO 2014/173862 13 PCT/EP2014/058057 took place over 62 days at a water temperature of 14'C. Fishes were fed once per day to apparent satiation with a diet as shown in Table 6. Panbonis@ 10 was used as test article in a concentration of 1.0 g/kg diet. 5 Table 6: Composition of the diet of Experiment 4 Raw materials (%) Control Control low Panbonis fish meal 1.0 g/kg Fish meal 40 25 25 Wheat flour 18.99 14.64 14.64 Vegetable protein 35 44 44 Fish meal 40 25 25 Vitamin premix 0.35 0.72 0.72 Mineral premix 0.8 1.2 1.2 Fish oil 6.5 8.5 8.5 Others 0.36 4.8 3.3 Panbonis@ 10 ---- ---- 0.10 Deffated rice bran ---- 1.14 2.54 Total 100 100 100 Table 7: Results of Experiment 4 Indicators Fish meal Low fish Panbonis control meal 1.0 g/kg Initial biomass (g) 1,048 1,034 1,033 Average body weight (g) 26.2+1.9 25.9+2.4 25.8+2.0 Final biomass (g) 3,247 3,058 3,444 Average body weight (g) 81.2±17.0a 76.4+19.5 86.1±17.la Survival rate (%) 100 100 100 Weight gain (g) 2,199 2,023 2,411 Average weight gain (%) 310 296 333 10 WO 2014/173862 14 PCT/EP2014/058057 One observes that a reduction in fishmeal affected the weight performance in rainbow trout. However, the addition of 1 g/kg Panbonis@ 10 to the diet having a lower content of fish meal improved the growth performance significantly although fishmeal inclusion was reduced in the feed. 5 As a conclusion from experiments 2, 3 and 4 shows that: - Calcium and Phosphorus utilization can be improved - Fishmeal replacement is possible 10 - Improved growth performance is real - Improved serum levels of active vitamin D3 are attained. A further experiment was then performed in which the initial proportion of added phosphor in the diet was reduced. 15 Experiment 5 (Phosphorus reduction) Thirty juvenile rainbow trout (Oncorhynchus mykiss) of 126 grams in average were kept per 20 tank in 4, respective 3 replicates per treatment. Duration of the feeding experiment was 63 days at a water temperature of 15'C in a recirculating system. Fish feed to feeding table to ensure no feed wastage and optimal feed conversion ratio (FCR) and fish were fed once per day to apparent satiation with a diet as shown in Table 8. Lighting was a constant 24h light regime. Dissolved oxygen was maintained above 7mg/l. 25 Positive control diet used commercially used standard P level of 0.90%, whereas the test diets used a P level of 0.70% at 26% below the positive control. Phytase was used at 750FTU/g. Panbonis was included at 0.15 and 0.3 g/kg diet and in conjunction with Phytase. 30 Table 8: Composition of the basal diet (negative control - NC) Ingredient g/kg diet Fish meal 220 WO 2014/173862 15 PCT/EP2014/058057 Soy protein concentrate 210 Wheat gluten 86 Corn gluten 60 Wheat meal 170 Lysine 6 Vitamin-mineral premix 20 Phosphate (MCP) Rapeseed oil 160 Fish oil 68 Table 9: Composition of the supplemented diet (negative control - NC) Treatment code Panbonis Phytase, Inorganic P Replicates mg/kg U/kg g/kg Negative control (NC) - - - 4 NC + Phosphate - - 2 4 NC + Panbonis@ 10 150 - - 3 NC + Panbonis@ 10 300 - - 3 NC + Phytase - 750 - 3 NC + Phytase + Panbonis@ 150 750 - 3 5 Table 10: Fish weight at end of experiment, (FCR) & bone ash in Experiment 5 Parameters Positive Negative NC + NC + NC + NC + Control Control Phytase Phytase Pan150 Pan300 +Panl50 Fish end weight [g] 454 448 446 448 440 450 FCR 0.87 0.88 0.89 0.88 0.90 0.87 Total bone ash mean 49.8 45.3 50.1 50.3 47.6 45.7 As result, the addition of the 1,25-Dihydroxyvitamin D3-glycosides containing product Panbonis to a diet reduced in phosphorus (from normal 0.9% to 0.7%) resulted in a definite WO 2014/173862 16 PCT/EP2014/058057 improvement of the feed conversion ratio and bone ash when the phosphorus reduced diet was supplemented with either Phytase or Panbonis@ 10 or a mixture of both. Experiment no 6 5 15 Japanese prawn ( Marsupenaeusjaponica - average body weight around 6.5 gram in 200L polycarbonate resin tank with (4 tanks ?) - water temperature 14 0 C - feeding once per day in the morning up to apparent satiation - dried Solanum glaucophyllum leaves constitute the source of 1,25-dihydroxyvitamin D3-glycosides. 10 Table 11: Composition of the feed formulation in Experiment 6 Table 11 Control-5 Test-9 Test- 10 Test-1I Panbonis@ 10 (%) - 0.001 0.01 0.10 1,25(OH) 2 Vit D 3 (jig/kg) - 0.1 1 10 Animal protein 71.00 Fish meal 1.00 Mono Calcium Phosphate 4.00 Vitamin premix 2.00 Others 22.00 22.00 21.00 21.90 Total 100.00 100.00 1100.00 100.00 Level of Vit D 3 derived from Vitamin premix and 188 fish oil (jig/kg) Tables 12, 13 & 14: Results of Experiment 6 Table 12 Control-5 Test-9 Test-10 Test-1I Panbonis@ 10 (%) ---- 0.001 0.01 0.10 I,25(OH) 2 Vit D 3 (jig/kg) ---- 0.1 1 10 Initial number 45 45 45 45 Average body weight (g) 6.4+0.9 6.5±0.9 6.4+0.8 6.5+0.8 WO 2014/173862 17 PCT/EP2014/058057 Final number 44 45 44 45 Average body weight (g) 11.6+1.6 11.5+1.3 11.3+1.1 11.7+1.5 Total weight gain (g) 222.0 222.5 210.1 233.2 Average weight gain (%) 181 177 177 180 Shell hardness * Table 13 Control-5 Test-9 Test-10 Test-1I Panbonis@ 10 (%) ---- 0.001 0.01 0.10 1,25(OH) 2 Vit D 3 (g) --- 0.1 1 10 Shell hardness (g) 175±39.8a 283±118b 315±65.lb 267±55.4b 1st abdominal segment (g) 116.6±31.5a 17 8 .6± 2 6 .3b 219.0±51.8c 178.2+49.9b 5 * Detected by Rheometer CR300 (Sun Scientific Co. Ltd.). Calcium content * Table 14 Control-5 Test-9 Test-10 Test-I Panbonis@ 10 (%) ---- 0.001 0.01 0.10 1,25(OH) 2 Vit D 3 (g) ---- 0.1 1 10 Ca content (00 in dry 4.42 5.13 5.68 5.19 matter) 10 * 6 shrimps were collected from each treatment and mixed to afford one sample for Ca content measurement. One observes - see Table 13 - a significant improvement of shell concerning the crustaceans fed with the composition according to the invention, hardness as compared to the control 15 population. Table 14 further shows a parallel improvement of the calcium absorption.

Claims (12)

  1. 2. The composition according to claim 1 wherein fishes comprise teleost fishes, finfishes 10 and eels.
  2. 3. The composition according to any of the preceding claims wherein mineral resorption means of phosphor resorption and/or calcium resorption or magnesium resorption. 15 4. The composition according to any of the preceding claims wherein Vitamin D metabolites comprise 25-hydroxyvitamin D3, 25-hydroxyvitamin D2, 1,25-dihydroxyvitamin D3, 1,25-dihydroxyvitamin D2, 1-a-hydroxycholecalciferol and 1-a-hydroxyergosterol and 1,25-dihydroxyvitamin D3-glycosides. 20 5. The composition according to any of the preceding claims wherein the source of dihydroxyvitamin D3-glycosides comprises plants selected from Solanum glaucophyllum, Cestum diurnum, Trisetum flavescens and Nierembergia veitchii.
  3. 6. The composition according to any of the preceding claims wherein the source of 25 dihydroxyvitamin D3-glycosides is Solanum glaucophyllum vegetal material like dried leaves of same or any water extract of same, any water/alcohol extract of same or any enriched and purified water/alcohol extract of same.
  4. 7. The composition according to any of the preceding claims where Solanum 30 glaucophyllum vegetal material or extracts of same are provided either from wild plants or from cultivated plants or hybrids of the latter such as HERVIT@ according to Plant Variety Certificate EU 25473. WO 2014/173862 19 PCT/EP2014/058057
  5. 8. The composition according to any of the preceding claims wherein vitamin D3 metabolites are provided to the fishes or crustaceans in their feed at a daily dose of about 0.1 gg to about 100 gg of vitamin D3 metabolite per kg fish or crustacean feed, optionally in addition to regular Vitamin D3 from other sources of same. 5
  6. 9. The composition according to any of the preceding claims wherein 1,25 dihydroxyvitamin D3-glycosides are provided to the fishes or crustaceans in their feed at a daily dose of about 0.1 gg to about 100 gg of 1,25-dihydroxyvitamin D3 glycosides per kg fish or crustacean feed, optionally in addition to regular Vitamin D3 10 originating from other sources.
  7. 10. A feed, a feed component or a feed additive useful for improving or enhancing resorption of minerals in farmed fishes and crustaceans which comprises as an active ingredient an efficient amount of the composition of any of claims I to 10. 15
  8. 11. A method for decreasing phosphor content in feed, feed components or feed additives used for feeding fishes and crustaceans in aquaculture which comprises reducing the initial standard recommended proportion of phosphor by about 10 to about 50 % of said initial proportion while adding thereto an efficient amount of the feed, feed 20 component or feed additive according to claim 10 while still achieving the same end performance.
  9. 12. A method for reducing phosphor pollution in aquaculture, especially fishes and crustaceans farming, which comprises feeding said fishes and crustaceans by means of 25 an efficient amount of a feed, feed component or feed additive according to claim 10.
  10. 13. A method for improving growth rate and reducing bone deformation in farmed fishes and crustaceans which comprises feeding said fishes and crustaceans by means of an efficient amount of a feed, feed component or feed additive according to claim 10. 30
  11. 14. A method for improving growth rate and well-being of farmed fishes and crustaceans when part of the fish meal and fish oil is replaced by vegetable proteins and vegetal oils supplemented with an efficient amount of a feed, feed component or feed additive according to claim 10 in order to correct imbalances introduced by said replacement. WO 2014/173862 20 PCT/EP2014/058057
  12. 15. A method for improving growth rate and well-being of farmed fishes and crustaceans when part of fish meal and fish oil is replaced by vegetable proteins and oils supplemented with an efficient amount of a feed, feed component or feed additive 5 according to claim 10, and further supplemented by means of phytase enzymes when anti-nutrient phytic acid is present in said vegetable oils and proteins.
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