A Comparison of the Effects of Crude Oil on Testis of two Teleosts (Poecilia sphenops and Xiphophorus helleri [1]

2019 ◽  
Vol 22 (4) ◽  
pp. 49
Author(s):  
Carlos Scotto ◽  
Raúl Rondón ◽  
César Arriola

El sulfato de cobre pentahidratado (CuSO4.5H2O) es utilizado en la acuicultura como un potente alguicida y/o molusquicida; pero el uso excesivo e indiscriminado puede conllevar a tener grandes daños en los cultivos de especies acuáticas silvestres no objetivo. La presente investigación determinó un rango de dosis letal media del sulfato de cobre entre 0.16 y 1.6 mg/L para diez especies de peces continentales: Neón Tetra (Paracheirodon Innesi), Dorado (Carassius auratus), Guppy (Poecilia reticulata), Bagre ventosa (Otocinclus macrospilus), Barbo (Barbus tetrazona), Molly (Poecilia sphenops), Monjita (Gymnocorymbus ternetzi), Espada (Xiphophorus helleri), Platy (Xiphophorus maculatus) y Corydora (Corydora aeneus). Para ello se realizó un ensayo preliminar de diez concentraciones seriadas por 24 horas con dos repeticiones. Seguidas de un ensayo final con cinco concentraciones seriadas a las 24, 48, 72, 96 y 120 horas de exposición. Posteriormente, se realizó el análisis con el programa Probit y se determinó que las CL50 fueron respectivamente de: 0,8mg/L,24h;1,2mg/L,96h; 0,4mg/L,96h; 1,2mg/L,48h; 0,8mg/L,48h; 0,16mg/L,24h; 0,8mg/L,24h; 0,1652mg/L,24h; 1,6mg/L,24h y 0,6mg/L,96h.


2014 ◽  
pp. 74-89 ◽  
Author(s):  
Vinh Vo Xuan

This paper investigates factors affecting Vietnam’s stock prices including US stock prices, foreign exchange rates, gold prices and crude oil prices. Using the daily data from 2005 to 2012, the results indicate that Vietnam’s stock prices are influenced by crude oil prices. In addition, Vietnam’s stock prices are also affected significantly by US stock prices, and foreign exchange rates over the period before the 2008 Global Financial Crisis. There is evidence that Vietnam’s stock prices are highly correlated with US stock prices, foreign exchange rates and gold prices for the same period. Furthermore, Vietnam’s stock prices were cointegrated with US stock prices both before and after the crisis, and with foreign exchange rates, gold prices and crude oil prices only during and after the crisis.


2015 ◽  
Vol 9 (1) ◽  
pp. 1 ◽  
Author(s):  
Yanuar Yanuar ◽  
Kurniawan T. Waskito ◽  
Gunawan Gunawan ◽  
Budiarso Budiarso

2020 ◽  
pp. 21-34
Author(s):  
Uche-Chinemere NWAOZUZU ◽  
Ifeanyichukwu ABADA ◽  
Emeka ANIAGO

This study presents an interdisciplinary approach towards a critical analysis of some impacts of crude-oil exploration in Niger Delta and polemics of viable conϐlict resolution framework. This approach involves analysis of Ahmed Yerima’s creative portrayal in Hard Ground which revolves around the variables activating conϐlicting emotional interests in matters concerning ‘black gold’ in Nigeria, and how these variables resonant in debates and demands for Nigeria’s polity restructuring because of perceived resource mismanagement. More so, our scope includes an analytical attempt at illuminating elaborately our interpretation of the dimensions to the loud and shrewd inclinations subsuming what some see as solution to the lingering conϐlict, and the suppositions explaining why others see the debates and demands on polity restructuring as dark convoluted ploys aimed at hidden agenda. Hence, through select theories of victimhood, this study attempts to elucidate on the variables propelling conϐlicting emotional interestsabout oil exploration in Niger Delta, by looking interpretively hard and deep on the perspectives, views and suppositions deϐining the ideologies and inclinations propelling them. In the end, this study notes that the disenchantments and troubles with Nigeria’s polity framework and structure as it relates to oil exploration in Niger Delta are subsumed in Hard Ground’s creativecontribution as a means of assessing the points to the fault-lines that characterize the subsisting socio-political structure upon which Nigeria stands and wobbles.


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