objective: the orange-red spectrum of  the skin of  electric yellow (labidochromis caeruleus) is  one  of  the  idealistic and  necessary  schemas sought  by  aquarists  and commercial producers. in this study, the effect of live foods meal on the skin coloration of juvenile electric yellow was examined. methods: 270 fish with an average living body weight was 0.42 ± 0.11 g, and average total l...

Chironomus Meigen (Diptera, Chironomidae) larvae are usually the largest sediment-burrowing chironomids, and as such often constitute a major part of the freshwater infaunal biomass. However, use of this genus in ecological, environmental and paleoecological studies is hampered by the fact that Chironomus larvae are difficult to identify to species because the larvae of many species are morphol...

the orange-red spectrum of  the skin of  electric yellow (labidochromis caeruleus) is  one  of  the  idealistic and  necessary  schemas sought  by  aquarists  and commercial producers. in this study, the effect of live foods meal on the skin coloration of juvenile electric yellow was examined. 270 fish with an average living body weight was 0.42 ± 0.11 g, and average total length was 3.3 ± 0.35...

INTRODUCTION Since the genus Rhynchosciara belongs, like Chironomus, to the suborder Nematocera it will be very interesting to see if the formation of its salivary secretion proteins is similar to that of Chironomus secretion or to Bombyx silk biosynthesis . Moreover, this work will be of importance for a better understanding of the hemolymph protein function and will provide a basis for improv...

We compared metal concentrations in larvae of two Chironomus species (Chironomus staegeri and Chironomus tigris) living in the same lake and at the same depth and time. Concentrations of the nonessential metal cadmium (Cd) differed greatly (.83) between the two species, whereas those of two essential metals differed either much less (zinc [Zn], 23) or not at all (copper [Cu]). These trends were...

INTRODUCTION Since the genus Rhynchosciara belongs, like Chironomus, to the suborder Nematocera it will be very interesting to see if the formation of its salivary secretion proteins is similar to that of Chironomus secretion or to Bombyx silk biosynthesis . Moreover, this work will be of importance for a better understanding of the hemolymph protein function and will provide a basis for improv...

The ecdysone titer of larvae and pupae of Chironomus thummi was determined by radioimmune assay (RIA) and revealed a concentration of about 150 ng/g fresh weigth in late third instar larvae and a peak of more than 450 ng/g fresh weight just preceding pupation. The ecdysone titer curve shows a high degree of correlation with previously observed puffing activity at the ecdysone sensitive chromoso...

INTRODUCTION Since the genus Rhynchosciara belongs, like Chironomus, to the suborder Nematocera it will be very interesting to see if the formation of its salivary secretion proteins is similar to that of Chironomus secretion or to Bombyx silk biosynthesis . Moreover, this work will be of importance for a better understanding of the hemolymph protein function and will provide a basis for improv...

the orange-red spectrum of  the skin of  electric yellow (labidochromis caeruleus) is  one  of  the  idealistic and  necessary  schemas sought  by  aquarists  and commercial producers. in this study, the effect of live foods meal on the skin coloration of juvenile electric yellow was examined. 270 fish with an average living body weight was 0.42 ± 0.11 g, and average total length was 3.3 ± 0.35...

Acute toxicity tests for the pesticides endosulfan and malathion on the larvae of Chironomus ramosus were conducted. Median Lethal Concentration (LC50) values of endosulfan were 0.55 x 10(-2), 0.16 x 10(-2), 0.089 x 10(-2) and 0.036 x 10(-2) ppb respectively, while those for malathion were 0.139 x 10(-2), 0.054 x 10(-2), 0.019 x 10(-2) and 0.0032 x 10(-2) ppb respectively, at 24, 48, 72 and 96 ...