果子狸对玉米、豆粕和鱼粉型日粮的消化率测定     

孔学民  康梦松 《经济动物学报》1998,2(2):39-41

本试验测定了 4只果子狸对玉米、豆粕和鱼粉型日粮的消化率。结果表明 :果子狸对该日粮的营养成分的消化率分别为 :粗蛋白 (CP) 68 31 % ,干物质 (DM ) 5 3 0 5 % ,精脂肪 (CL)5 8 30 % ,能量 (GE) 61 31 %。  相似文献   

水乡嘉鱼莲藕文化探究     

鲁运江 《长江蔬菜》2012,(16):150-152

对"水乡嘉鱼"其名、嘉鱼"湖莲"及"六月暴"的栽培历史进行了考究,并对人工大面积植莲的始末及近年来子莲和莲藕栽培情况进行了分析,同时探究了嘉鱼莲藕的饮食文化,说明莲藕对嘉鱼莲农有着深厚的感情,也是莲农科学致富的一大特色经济收入来源。  相似文献   

Metabolic effects of changes in the dietary protein: carbohydrate ratio in eel (Angilla anguilla) and trout (Oncorhynchus mykiss)     

M.D. Suárez  A. Sanz  J. Bazoco  M. García-Gallego 《Aquaculture International》2002,10(2):143-156

The metabolic consequences of the isoenergetic replacement of dietaryprotein by carbohydrates (CHO) were compared in studies of European eel andrainbow trout. Diets with 45/20, 37/30, 29/40 and 21/50 percentprotein/carbohydrate were assessed during a 12-week experiment. The CHO sourcewas pre-gelatinized corn starch. Fish of initial average weight 45gwere fed to satiation twice daily. Weight-gain and feed-efficiency data weregenerally better in trout than in eel, presumably because trout digestibilitycoefficients for protein and energy were higher than in eel. In both species,regardless of physiological differences in digestion and absorption, feedintakeand nutrient digestibility were lower when dietary CHO was higher, but theinter-species differences decreased with increasing dietary CHO.Pyruvate kinase activity (PK) in trout was not affected by dietary CHO content,while blood-glucose and liver-glycogen levels significantly rose withincreasingdietary CHO. In contrast, blood-glucose levels appeared to be regulated ineels,perhaps by an accelerated glycolysis rate, revealed by changes in PK.Gluconeogenic activity was inhibited in trout fed a diet containing20–30%CHO, while in eels this activity was not inhibited by dietary replacement ofprotein by carbohydrate. Liver glucose 6-phosphate dehydrogenase activity(G6PDH) was inhibited in trout fed increasing dietary CHO, whereas in eelsG6PDHoperated at a high rate regardless of dietary composition. These results mayindicate that eels have a better capacity for metabolising high-CHO/low-proteindiets than do trout.  相似文献   

普通菜籽粕(饼)的发酵处理及其应用     

刘进远  屈东  余丹  李斌  陈瑾  邹成义 《四川畜牧兽医》2014,(6):27-29

本文简要综述了普通菜籽粕(饼)的营养特性、质量标准和饲用价值,介绍了菜籽粕(饼)的发酵技术及其产品质量标准,并列出了发酵菜籽粕(饼)在生猪日粮中的用量和相应配方。  相似文献   

细纹狮子鱼的食性及其食物消耗量初探     

姜卫民 《中国水产科学》1996,3(3):8-15

根据１９８５－１９８６年黄海生态调查收集的胃含物资料，本文建立了胃含物平均重量与鱼体重、体长的关系：Ｗ＝０．１９９８Ｓ＾０．７６９和Ｗ＝０．０１０５Ｌ＾２．２５３细纹狮子鱼的主要食物为Ｔｉ鱼和脊腹褐虾。食物组成随时间和体长不同而变化。小个体的细纹狮子鱼（〈１５ｃｍ）提食更多虾类和其它甲壳类。细纹狮子鱼的食物个体较小，一般小于１０ｃｍ。食物大小随体长变化不大。胃含物内食物的平均个数随体长增长而增加。  相似文献   

Feed preferences in juvenile cod estimated by inert lanthanid markers – effects of moisture content in the feed     

Håkon Otterå  Oddvard Garatun-Tjeldstø  Kåre Julshamn  Erland Austreng 《Aquaculture International》2003,11(1-2):217-224

There are indications that low ingestion ratesof formulated feed may limit the growth ofearly juvenile fish, including cod. This hasparticularly been observed during the weaningperiod, when the fish must change from apresumably palatable live prey to usually a drydiet. The study of the physical properties ofthe diet seems to be an underestimated area ofresearch, compared to studies on thenutritional properties of the diet. In thisstudy we used lanthanide markers as a tool inestimating diet preferences for examining theeffect of dietary moisture content on ingestionrates in juvenile cod (0.8 g). Fishmeal-baseddiets were produced with five levels of water,giving diets with 35, 42, 54, 65 or 95% dryweight. Each diet was marked with a smallamount of a lanthanide or yttrium oxide. Thefish were hand fed on a mixture of these fivediets. Ingestion rates where then estimated bykilling 1/2 of the fish after one day and therest after four days of feeding. The whole fishwith gut content was homogenized and markercontent was measured by ICP-MS. The amountingested of each of the five diets could thenbe calculated from these figures. Despite thehigh variation in diet selection betweenindividuals the results clearly indicate ahigher intake of moist feed. This could becaused by a better palatability or to a higheravailability caused by a lower sinking rate ofthe moist feed.  相似文献   

Effects of photoperiod, stocking density and diet on growth in young spotted wolffish (Anarhichas minor olafsen)     

Thor M. Jonassen 《Aquaculture International》2002,10(5):411-420

Full scale experiments in tanks were conducted to elucidate the effect of photoperiod regime, dietary fat level and stocking density on growth in spotted wolffish. The study showed that continuous light (LD24:0) did not give a higher final mean weight or faster overall growth rate in spotted wolffish compared to constant 8 h light and 16 h darkness (LD8:16). However, there were indications that the fish needed time to adapt to a new photoperiod regime. The feeding experiment indicated a negative relation between dietary fat level and growth, where fish given 15% fat in the diet had a 13% higher final mean weight compared to fish on a diet with 20% fat. However, no conclusions could be made. The final mean weight was 10% higher at 25 kg/m² compared to 40 kg/m², indicating a negative impact of high stocking density on spotted wolffish.  相似文献   

Ferret Nutrition     

《Veterinary Clinics of North America: Exotic Animal Practice》2014,17(3):449-470

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SHORT COMMUNICATION Evidence for dietary effects on plasma levels of sexual steroids during spermatogenesis in the sea bass     

Joan Cerda  Silvia Zanuy  Manuel Carrillo 《Aquaculture International》1997,5(5):473-477

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短鳃伪稚虫的习性、分布及其在对虾养殖中的应用研究     

孙修涛  张岩  李健  麻次松  赵法箴  于永隆  杨鸿运 《海洋水产研究》2001,22(1):7-12

报告了对虾养殖池中可以作为对虾优质饵料生物的一种小型底栖多毛类生物－短鳃伪稚虫及其幼体的生物学习性，内容包括春，夏期间丁字湾沿岸与牟平沿岸海幼体密度的季节变节，虾池中幼体密度的季节变化和昼夜变化，短锶伪推虫成体的生态习性以及引种繁殖的一般方法。  相似文献