Protein nutrition in the juvenile Australian short-finned EEL (Anguilla australis australis Richardson)
Başlık çevirisi mevcut değil.
- Tez No: 400710
- Danışmanlar: DR. CHRIS G. CARTER
- Tez Türü: Doktora
- Konular: Balıkçılık Teknolojisi, Fisheries Technology
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2001
- Dil: İngilizce
- Üniversite: Unıversıty Of Tasmanıa
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Balıkçılık Teknolojisi Mühendisliği Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
Özet yok.
Özet (Çeviri)
Little is known about the nutrition of the Australian short-fmned eel, Anguilla.australis.australis (Richardson) although it is considered as a prime candidate for inland aquaculture in Australia. This study provides information about the protein metabolism of the juvenile Australian short-fmned eel. The efficiency of partitioning dietary protein into growth is closely related to the amount of nonprotein energy yielding substrates and the quality of protein (the availability and balance of amino acids) sources provided in the diet. The measurement of nitrogenous excretion can also give an insight into the nitrogen balance of fish and partly define the success of a particular nutritional regimen. Therefore, this study aimed at measuring the growth, growth efficiency and nitrogenous excretion of the juvenile Australian short-finned eel fed over a range of dietary proteimenergy ratios and with selected Australian plant and animal proteins. Since the maximum protein growth will occur over a narrow range of dietary protein:energy ratios, the effects of increasing dietary crude protein contents at two different energy levels on the growth and growth efficiency were measured. A 10 % increase in dietary crude protein (from 25 to 35 %) in low protein:high non-protein energy diets positively affected weight gain whereas significantly (P <0.Q5) reduced weight gain was observed for a 10 % crude protein increase (from 45 to 55 %) in high proteimlow non-protein energy diets. The whole body crude protein content was not affected by diet but the whole body crude lipid content decreased with the 10 % crude protein increase at each energy level. This study indicated a protein-sparing effect of non-protein energy sources in the diets of short-finned elvers. A lipid to carbohydrate ratio of 0.9 appeared to be needed for the maximum growth. The optimum dietary digestible crude protein (DCP): digestible energy (MJ DE) requirement of the short-finned elvers was investigated with 7.5 % crude protein increments (from 25 to 55 % of the diets) in iso-energetic diets. The optimum dietary digestible crude protein was estimated as dietary percentage (% CP DM) and as a dietary digestible crude protein:digestible energy ratio (g DCP/MJ DE) using total weight gain (g). Second order polynomial (quadratic) and 5-SKM (five parameter saturation kinetics) models were chosen for the estimation of the optimum dietary digestible crude protein. Two models gave similar results estimating the optimum dietary digestible crude protein as 43.0 % CP DM (±3.5) (r2 - 0.79; F=9.2157; iM).021) and 41 % CP DM (r^O.77) or as 24.5 g.DCP/MJ DE (±1.7) (^=0.83; F^12.0573; P=0.012) and 23.5 g DCP/MJ DE (r2-0.75) respectively. Whole body crude protein and lipid contents tended to increase with increasing dietary crude protein in this experiment. Nitrogen losses are primarily through faeces and metabolic excretion and largely influenced by dietary composition. Increasing protein content at two energy levels caused peak nitrogenous excretion rates 4-8 h following both the morning and afternoon feed. Daily ammonia-nitrogen excretion was significantly (PO.05) higher on high proteimlow non-protein energy diet (P55) compared to the P35 and P45 diets. Increasing dietary crude protein intake resulted in increasing ammonia-(y=0.022x+0.058; w=12; r2=0.88; i><0.001) and urea-nitrogen (y=0.0044x+0.426;- * »=12; r =0.55; P<0.05) excretion in treatments. The proportional increase in urea-nitrogen excretion to total nitrogenous excretion with increasing dietary non-protein energy sources also indicated that urea-nitrogen excretion in the Australian short-finned eel could be more responsive to nutritional variables. Fish meal is an expensive component offish feeds and replacement of it with alternative protein sources without compromising the growth rate has been a priority in aquaculture nutrition research. Apparent digestibility coefficients were measured in order to assess the suitability of selected Australian plant and animal protein sources for fish meal replacement. Apparent crude protein digestibility was high for the selected Australian plant proteins and animal by-products. However, dry matter and energy digestibilities were found to be significantly (jP<0.0001) higher for animal by-products than for plant proteins except for corn gluten meal. This was explained by the higher content of nitrogen free extract (NFE) in all the plant proteins except corn gluten meal. A final experiment was conducted to test the effects offish meal replacement with corn gluten meal, meat meal, lupin meal and soy bean meal in diets using the optimum DCP/MJ DE ratio on growth, growth efficiencies and nitrogenous excretion by the Australian short-finned elvers by formulating the diets according to the optimum DCP/MJ DE ratio and ADC values determined in the present study. This study primarily showed better dietary protein retention efficiencies when juvenile Australian short-finned eel were fed low proteimhigh non-protein energy diets and established the optimum DCP/MJ DE requirement of this species for maximum growth. The establishment of the optimum protein:energy ratio and identification of highly digestible alternative protein sources provides a basis for decreasing nitrogenous waste production, maximising protein retention and better eel culture practises in Australia generally.
Benzer Tezler
- Organik sertifikalı bazı hammaddelerin gökkuşağı alabalığı (Oncorhynchus mykiss Walbaum, 1792) beslemesinde kullanımı
The utilization of selected organically certified ingredients in rainbow trout (Oncorhynchus mykiss Walbaum, 1792) nutrition
DERYA GÜROY
Doktora
Türkçe
2009
Su ÜrünleriÇanakkale Onsekiz Mart ÜniversitesiSu Ürünleri Ana Bilim Dalı
DOÇ. DR. AHMET ADEM TEKİNAY
- Juvenil idyopatik artrit tanısı ile izlenen çocuk hastalarda bioaktif D vitamini düzeyi ve DVBP polimorfizmlerinin hastalık aktivitesi ve kemik mineral yoğunluğu ile ilişkisinin değerlendirilmesi
Evaluation of the relationship between bioactive vitamind level and DVBP polymorphisms with disease activity and bone mineral density in pediatric patients with juvenile idiopathic arthritis
ALİ AVCI
Tıpta Uzmanlık
Türkçe
2020
Çocuk Sağlığı ve HastalıklarıAkdeniz ÜniversitesiÇocuk Sağlığı ve Hastalıkları Ana Bilim Dalı
DOÇ. DR. ELİF ÇOMAK
- Efecto de la Artemia Enriquecida con distintas Emulsiones Comerciales Sobre el crecimiento y desarrollo esquelético de larvas del lenguado senegalés (Solea senegalensis kaup, 1858)
Farklı Ticari Emülsiyonlarla Zenginleştirilmiş Artemia'nın dil balığı (Solea senegalensis kaup, 1858) larvalarının büyümesi ve iskelet gelişimi üzerine etkisi
FİLİZ ÖZCAN
Yüksek Lisans
İspanyolca
2010
Su ÜrünleriInstıtuto Agronómıco Medıterraneo de ZaragozaSu Ürünleri Yetiştiriciliği Ana Bilim Dalı
PROF. DR. ENRİC GİSBERT
- Ekonomik değeri olan kara salyangozlarından Helix aspersa ile Helix lucorum türlerinin beslenme periyodundaki kas protein değişimi (Gastropoda: Helicidae)
Changes of muscle proteins depending on the nutrition in land snails which have economic importance; Helix aspersa and Helix lucorum
SEVGİ YILMAZ
- Yunus ciklit (Cyrtocara moori, Boulenger 1902) balıklarının protein ihtiyacının belirlenmesi üzerine bir araştırma
Determination of optimum dietary protein level for blue dolphin (Cyrtocara moori, Boulenger 1902)
İZZET ŞAHİN
Yüksek Lisans
Türkçe
2011
Su ÜrünleriÇanakkale Onsekiz Mart ÜniversitesiSu Ürünleri Ana Bilim Dalı
PROF. DR. AHMET ADEM TEKİNAY