Dietary Copper Affects Survival, Growth, and Reproduction in the Sea UrchinLytechinus variegatus

AbstractThe addition of copper to an artificial diet greatly improves growth of the house cricket, Acheta domesticus (L.). Adding zinc improves growth in the presence of added copper, but not in its absence, indicating an interaction between the two trace elements. Reproduction is always ’normal’ with added copper in the diet. Zinc added at a low level will support ’normal’ reproduction, but not at high levels. Survival is poor without added copper in the diet. It is suggested that the minimum growth requirements for zinc and copper are a total of 23 μg/g diet and 14 μg/g diet respectively.

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EFFECTS OF CHRONIC DIETARY COPPER EXPOSURE ON GROWTH AND REPRODUCTION OF DAPHNIA MAGNA

Environmental Toxicology and Chemistry ◽

10.1897/03-411 ◽

2004 ◽

Vol 23 (8) ◽

pp. 2038 ◽

Cited By ~ 53

Author(s):

Karel A.C. De Schamphelaere ◽

Colin R. Janssen

Keyword(s):

Daphnia Magna ◽

Copper Exposure ◽

Dietary Copper ◽

Growth And Reproduction

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Aortic lesions in copper deficiency: Modification by dietary carbohydrates

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100143419 ◽

1986 ◽

Vol 44 ◽

pp. 358-359

Author(s):

U. Bielenberg

Keyword(s):

Copper Deficiency ◽

Male Rats ◽

Dietary Carbohydrates ◽

Dietary Copper ◽

Serum Ceruloplasmin ◽

Hepatic Copper ◽

Dietary Treatments ◽

Feeding Diets ◽

Ceruloplasmin Activity ◽

Simple Carbohydrate

Copper deficiency can cause cardiovascular lesions in experimental animals. Previous experiments have shown that the biochemical and itDrphologic lesions induced by deprivation of dietary copper can be suppressed by feeding diets containing starch or can be magnified by a high sucrose diet. In a recent study it was found that the more severe signs of copper deficiency in rats fed sucrose as compared to starch were due to the fructose moiety of sucrose. Although fructose as compared to starch markedly enhanced the symptoms of copper deficiency, the possibility that an effect of dietary carbohydrates due to the nature of the simple carbohydrate (fructose vs glucose) cannot be excluded. The present study was designed to determine if the severity of copper deficiency in rats fed sucrose as compared to starch is due to the glucose as well as the fructose moiety of sucrose. This portion of the study assessed the morphologic changes in aortas of seventy weanling male rats who were fed, for 9 weeks, copper deficient or copper supplemented diets containing either 62% starch, fructose or glucose. The starch-fed copper supplemented group served as the most normal controls. Rats were sacrificed after 9 weeks of dietary treatments. Copper deficiency was verified by reduced serum ceruloplasmin activity and serum and hepatic copper concentration.

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