Larval development of hermit crab Clibanarius longitarsus: Synergistic effect of heavy metals

Biologia ◽  
2010 ◽  
Vol 65 (4) ◽  
Author(s):  
Somasundaran Lyla ◽  
Ajmal Khan
Keyword(s):  
Heavy Metals ◽  
Survival Rate ◽  
Larval Development ◽  
Hermit Crab ◽  
Zoeal Stage ◽  
Copper And Zinc ◽  
Vellar Estuary ◽  
Zinc Concentrations ◽  
Time Required ◽  
Sublethal Concentrations

AbstractThe levels of heavy metals copper and zinc were found to be high in the Vellar estuary. Therefore their effects on the larval development of the abundant hermit crab Clibanarius longitarsus were studied individually and in combination from hatching till moulting to glaucothoe stage in the laboratory using freshly hatched Artemia nauplii as food. The 96 h LC50 values found with 100 larvae each kept in 10 different concentrations of copper and zinc (350, 300, 250, 200, 150, 100, 50, 25, 10 and 5 ppb) were 50 ppb for copper and 90 ppb for zinc. Based on these 96 h LC50 values, three sublethal concentrations were chosen for the metals copper and zinc at 50%, 25% and 10% levels of the LC50 values. With increase in concentration of the test medium, the survival rate decreased and the time required for the completion of each zoeal stage increased. Copper was found to be more toxic than zinc as the survival rate in copper concentrations was lower than those in zinc concentrations. The survival rate in the mixed concentrations of metals was lower than in individual concentrations.

COPPER AND ZINC INDUCED CHANGES IN SOYBEAN (Glycine max (L.) Merr.)

1970 ◽  
pp. 09
Author(s):  
K. SANKAR GANESH ◽  
P. SUNDARAMOORTHY
Keyword(s):  
Heavy Metals ◽  
Glycine Max ◽  
Aquatic Environment ◽  
Morphological Traits ◽  
Industrial Activities ◽  
Copper And Zinc ◽  
Glycine Max L ◽  
Zinc Concentrations ◽  
Induced Changes

Heavy metals are one of the most important pollutants released to the aquatic environment by the various industrial activities. The use of these wastewater for irrigation results accumulation of heavy metals in soil and plants. So, the present investigation deals with the various concentrations (0, 5, 10, 25, 50, 100, 200 and 300 mg/l) of copper and zinc on germination studies of soybean. The different concentrations of copper and zinc were used for germination studies. The seedlings were allowed to grow upto seven days. The studied morphological traits increased at 5 mg/l concentration and these parameters are gradually decreased with the increase of copper and zinc concentrations.

Evaluation of iron, copper and zinc concentrations in commercial foods formulated for healthy cats

2021 ◽  
pp. 1098612X2110262
Author(s):  
Stacie Summers ◽  
Jonathan Stockman ◽  
Jennifer A Larsen
Keyword(s):  
Food Products ◽  
Metabolizable Energy ◽  
Life Stages ◽  
Trace Mineral ◽  
Iron Copper ◽  
Copper And Zinc ◽  
Zinc Concentrations ◽  
Dry Food ◽  
Raw Foods ◽  
Mineral Concentrations

Objectives The aim of this study was to analyze iron, copper and zinc concentrations in commercial foods and compare among food formats (dry, canned, raw), foods marketed by age category (adult 1+ years and senior 7+ years) and foods intended for adult maintenance vs all life stages. Methods In total, 112 commercial non-therapeutic food products marketed for healthy adult and senior cats were purchased in the USA. Foods were analyzed for their proximate composition. Trace mineral concentrations were measured using inductively coupled argon plasma–optical emission spectroscopy and described on a calculated metabolizable energy basis using standard modified Atwater values. Results Measured iron (median 58.4 mg/1000 kcal [range 15.7–379.0]), copper (median 5.6 mg/1000 kcal [range 0.8–13.3]) and zinc (median 47.6 mg/1000 kcal [range 7.6–128.1]) concentrations were highly variable among cat foods. When all food products – regardless of their nutritional adequacy substantiation method – were compared with the Association of American Feed Control Officials regulatory minimums, 13/112 food products had a mineral deficiency, of which a majority (n = 11/13) were raw food products. Raw foods had significantly lower trace mineral concentrations compared with dry food products and, except for copper, canned food products. Cat foods marketed for senior cats had higher iron ( P = 0.019) and zinc ( P <0.0001) concentrations than foods marketed for adult cats. Foods intended for adult maintenance had higher iron ( P = 0.003) and zinc concentrations than foods intended for all life stages ( P <0.0001). Conclusions and relevance Iron, copper and zinc concentrations in commercial non-therapeutic foods for adult and senior cats are highly variable. A minority of foods – mainly raw food products – were deficient in these minerals. It is unknown if some foods with high trace mineral concentrations could have adverse effects as studies are needed to establish safe upper limits for dietary intake of trace minerals in healthy cats.

A two hundred years record of atmospheric cadmium, copper and zinc concentrations in high altitude snow and ice from the French-Italian Alps

2000 ◽  
Vol 27 (2) ◽  
pp. 249-252 ◽  
Author(s):  
Katja Van de Velde ◽  
Claude F. Boutron ◽  
Christophe P. Ferrari ◽  
Ann-Laure Moreau ◽  
Robert J. Delmas ◽  
...  
Keyword(s):  
High Altitude ◽  
Italian Alps ◽  
Copper And Zinc ◽  
Zinc Concentrations ◽  
Snow And Ice

The Effect of Synchronous Moulting on Body Copper and Zinc Concentrations in Four Species of Talitrid Amphipods (Crustacea)

1991 ◽  
Vol 71 (2) ◽  
pp. 481-488 ◽  
Author(s):  
J. M. Weeks ◽  
P. G. Moore
Keyword(s):  
Tidal Cycle ◽  
Zinc Content ◽  
Lunar Cycle ◽  
Moult Cycle ◽  
Metal Concentrations ◽  
Total Copper ◽  
Copper And Zinc ◽  
Talitrus Saltator ◽  
Zinc Concentrations ◽  
New Moon

Analysis of the total copper and zinc content of four species of talitrid amphipods, Orchestia gammarellus, O. mediterranea, Talitrus saltator and Talorchestia deshayesii throughout a complete spring/neap tidal cycle failed to reveal any significant effects of moulting upon body copper or zinc in any species. Moulting was synchronized to the lunar cycle only in T. saltator, taking place 5–7 days prior to a new moon. The fact that no significant changes in body metal concentrations took place with the moult cycle is discussed in relation to the use of talitrid amphipods in copper and zinc biomonitoring programmes.

scholarly journals Correlation of microelements like plasma copper and zinc concentrations with female infertility

2017 ◽  
Vol 6 (6) ◽  
pp. 2351
Author(s):  
Ritu Bawa ◽  
Smita Tyagi
Keyword(s):  
Systemic Disease ◽  
Venous Blood ◽  
Unexplained Infertility ◽  
Female Infertility ◽  
Reproductive Age ◽  
Control Group ◽  
Copper And Zinc ◽  
Plasma Copper ◽  
Zinc Concentrations ◽  
The Difference

Background: The aim of present study was to determine the role of trace elements copper and zinc and impairment of infertility.Methods: The study was a randomized, comparative, clinical trial where study group included 74 patients with primary or secondary infertility and control group included 20 patients who were fertile females of reproductive age group having no gynaecological or systemic disease. Venous blood samples were taken and plasma copper and zinc concentrations were measured.Results: In the normal fertile non-pregnant healthy female’s plasma copper ranged from 98.78 - 169.2 mcg% (mean 124.72 mcg%). In patients of unexplained infertility plasma copper was found to be low. It ranged from 63.0 - 145.14 mcg% (mean 95.5 mcg%) difference being statistically significant, (P<0.001). The difference in plasma zinc concentration in both group was not statically significant (P>0.05).Conclusions: Our results show that copper deficiency might have a role to play in the etiogenesis of otherwise unexplained infertility. We can also conclude that zinc deficiency may not play a significant role in female infertility.

Copper and zinc concentrations in serum of healthy Greek adults

2006 ◽  
Vol 359 (1-3) ◽  
pp. 76-81 ◽  
Author(s):  
Eleni Kouremenou-Dona ◽  
Artemis Dona ◽  
John Papoutsis ◽  
Chara Spiliopoulou
Keyword(s):  
Copper And Zinc ◽  
Zinc Concentrations ◽  
Greek Adults

scholarly journals Concentration of Trace Metals (Lead, Iron, Copper and Zinc) In Crops Harvested in Some Oil Prospecting Locations in River State, Nigeria

2005 ◽  
Vol 5 (9) ◽  
pp. 01-21
Author(s):  
Alexander Hart ◽  
◽  
Oboh CA ◽  
Barimalaa IS ◽  
TG Sokari
Keyword(s):  
Trace Metals ◽  
State University ◽  
Industrial Base ◽  
Iron Copper ◽  
Copper And Zinc ◽  
Port Harcourt ◽  
Zinc Concentrations ◽  
Hibiscus Esculentus ◽  
High Level ◽  
Rivers State

Concentrations of the trace metals lead, iron, copper and zinc were estimated in crops harvested in some oil prospecting locations in Rivers State, Nigeria. The locations were; Agbada-Aluu (AA), Ebocha (EB), Idu Ekpeye (IE), Obagi (OB) and Trans Amadi Layout (TA), with the Teaching and Research Farm of Rivers State University of Science and Technology, Port Harcourt as control. Crops investigated were cassava (Manihot esculenta), cocoyam (Colocasia esculenta), okra (Hibiscus esculentus), pumpkin leaves (Telfairia occidentalis) and waterleaf (Talinum traingulare). Results of the mean lead concentrations were from 1.1µg/g in cocoyam to 9.1 µg/g in okro, showing higher trends in the industrialized areas. While cocoyam had the lowest lead concentration, the concentration rest of the crops did not differ significantly from one another. Crops from locations TA, OB, IE and EB had significantly higher concentrations of lead, although IE, AA and TF were not significantly different from one another. Mean concentrations of iron were between 40 µg/g in cassava from TF, and 651 µg/g in pumpkin leaves from TA - the industrial base of Rivers State - reflecting a high level of pollution from the various industries in that location. Differences in concentration of iron in crops showed pumpkin leaves to have the highest level of iron, followed by the other green vegetables – waterleaf and okra - although no significant differences occurred between okra, cocoyam and cassava. Copper concentrations were between 4.4 µg/g in cocoyam from locations TF and 23 µg/g in pumpkin leaves from TA. Pumpkin leaves had the highest concentrations of copper, followed by okra, then waterleaf, with cocoyam and cassava having the least significant levels. Zinc concentrations in crops were between 29 µg/g in cocoyam from TF to 240 µg/g in pumpkin leaves from EB. Pumpkin leaves and okra contained the highest levels of the metal, followed by waterleaf, then cassava and finally cocoyam. In terms of location, TA, OB and EB had the highest concentrations in crops, the least occurring in TF and AA. These results reflect higher concentrations of metals in crops from the industrialized locations, with the green vegetables, particularly pumpkin leaves, having the highest uptake, while cocoyam invariably had the least. These findings give cause for concern, particularly as heavy metals are bio-accumulative in the system and portend a serious health risk to man and animals.

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