scholarly journals Digestible lysine requirement for Tambaqui (Colossoma macropomum) juveniles using the diet dilution technique

2020 ◽  
Vol 18 ◽  
pp. 100482
Author(s):  
Rafael Silva Marchão ◽  
Felipe Barbosa Ribeiro ◽  
Jefferson Costa de Siqueira ◽  
Marcos Antonio Delmondes Bomfim ◽  
Janayra Cardoso Silva ◽  
...  
Keyword(s):  
Dilution Technique ◽  
Colossoma Macropomum ◽  
Diet Dilution

scholarly journals Digestible threonine requirement in diets for tambatinga (♀Colossoma macropomum x ♂Piaractus brachypomus) fingerlings

2021 ◽  
Vol 45 ◽  
Author(s):  
Marcos Antonio Delmondes Bomfim ◽  
Rafael Silva Marchão ◽  
Felipe Barbosa Ribeiro ◽  
Jefferson Costa de Siqueira ◽  
Dayana da Conceição da Costa ◽  
...  
Keyword(s):  
Weight Gain ◽  
Feed Efficiency ◽  
Nitrogen Retention ◽  
The Body ◽  
Experimental Unit ◽  
Feed Conversion ◽  
Retention Efficiency ◽  
Colossoma Macropomum ◽  
Randomized Design ◽  
Diet Dilution

ABSTRACT Cross breeding of native fish species is a technique to produce hybrids that can express higher weight gain and feed efficiency compared to the parental species. The digestible threonine requirement in diets for tambatinga fingerlings (Colossoma macropomum ♀ x Piaractus brachypomus ♂) was determined in this study. For this, 700 fingerlings with an average initial weight of 2.39 ±0.02 g and average final weight of 35.96 ±2.03 g were distributed in a completely randomized design consisting of six treatments (0.600, 0.800, 1.000, 1.200, 1.400, and 1.600% digestible threonine) and five replicates per treatment, with 20 fish per experimental unit. Diets were formulated by the “diet dilution” technique using the ideal protein concept. Performance, feed efficiency, body depositions of protein, ash and fat, and nitrogen retention efficiency of the fish were evaluated. The digestible threonine levels that optimized weight gain, specific growth rate, and feed conversion ratio were 1.40, 1.27 and 1.10%, respectively. Body deposition of fat was reduced in a quadratic manner (p<0.01), and the body depositions of protein and ash, together with the efficiency of nitrogen retention, were optimized by the digestible threonine level of 1.20; 1.33, and 0.82%, respectively. The recommended digestible threonine level in the diet for tambatinga fingerlings is 1.20 to 1.40% (0.40 and 0.47% Mcal DE-1) to obtain higher body deposition of protein and weight gain, respectively.

Fibrinolysis in Obstetrical Coagulopathy

1961 ◽  
Vol 05 (01) ◽  
pp. 021-037 ◽  
Author(s):  
H Zilliacus
Keyword(s):  
Coagulation Factors ◽  
Clotting Factor ◽  
Foetal Death ◽  
Dilution Technique ◽  
Induced Labor ◽  
Blood Samples ◽  
Decidual Tissue ◽  
Obstetrics And Gynaecology ◽  
Obstetrical Management ◽  
Uterine Haemorrhage

SummaryIn the introduction it is stressed that in cases with normal blood coagulation and even in cases with a limited decrease of some of the coagulation factors, the contraction of the uterus after the passage of the placenta closes the vessel endings, thereby providing the conditions necessary for haemostasis through the clotting of the blood. In contrast to this, fibrinolytic uterine bleeding is a condition in which the clotting factor and clot are consumed despite adequate postpartum contraction of the uterus.The literature on obstetrical coagulopathies is briefly summarized.The incongruence in the clotting power of blood samples drawn simultaneously from a cubital vein and from the uterus in cases of severe uterine haemorrhage is pointed out.With the aid of a plasma-dilution technique (Schneider) for the estimation of fibrinogen and fibrinolysis it was shown that in 6 out of 8 investigated cases of premature separation of the placenta, in 4 out of 5 observed cases of longstanding intrauterine foetal death and in 2 cases of pitocin drip induced labor considerable fibrinolytic activity was present in the blood from the uterus, whereas only slight activity if any, could be observed in blood samples drawn simultaneously from a cubital vein. These observations are found to be in conformity with the finding of considerable amounts of fibrinolytic activators in myométrial, placental and decidual tissue reported by other authors.Figures for obstetrical cases (19,808 deliveries) and uterine haemorrhage during the 5-year period 1955—1959 at the 1st Department of Obstetrics and Gynaecology, University Central Hospital, Helsinki, Finland, are presented. The main principles of obstetrical management at this hospital are outlined, with special reference to uterine coagulopathic haemorrhage.

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