امروز جمعه , 16 شهریور 1403
شنبه تا پنج شنبه - 9 صبح الی 20 عصر
دانلود مقاله The effect of synthetic and natural pigments on the colour of the cichlids (Cichlasoma severum sp., Heckel 1840)
![دانلود مقاله The effect of synthetic and natural pigments on the colour of the cichlids (Cichlasoma](/content/productpic/74328f1f661c-434a-43e2-a889-050d7e67410e.jpg)
دانلود مقاله
The effect of synthetic and natural pigments on the colour of the cichlids (Cichlasoma severum sp., Heckel 1840)
نویسنده :
Aysun Kop . Yas¸ar Durmaz
DOI 10.1007/s10499-007-9130-1
فرمت: pdf
Abstract :
In this study, we have investigated the effects of Porphyridium cruentum
(Rodophyta) as a natural pigment source and astaxanthin and b-carotene as synthetic
pigment sources on the skin colour of cichlid fish (Cichlasoma severum sp., Heckel 1840),
which are generally light orange with white patches and becomes shiny orange in the
reproductive phase. The fish were fed diets containing 50 mg kg–1 astaxanthin and bcarotene,
and P. cruentum powder. The amount of both natural and synthetic pigment
sources given as feed was 50 mg kg–1, and the experiment was continued for 50 days.
Total carotenoid content of the fish was determined spectrophotometrically at the end of
the experiment. As a result, while a visible change of colour in the skin of the fish fed on
the feed containing astaxanthin was observed with 0.34 ± 0.2 mg g–1 of pigment accumulation,
a relatively small change of colour was observed in the skin of other fish that
were fed on the feed containing P. cruentum and b-carotene with 0.22 ± 0.2 mg g–1 and
0.26 ± 0.1 mg g–1 of pigment accumulations, respectively. Therefore, it was determined
that these pigment sources have an effect on the colour of cichlid fish.
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