Abstract Background Formation of triploid organism is useful in genetics and breeding. In this study, autotriploid Carassius auratus (3nRR, 3n = 150) was generated from red var. (RCC, 2n 100) (♀) autotetraploid (4nRR, 4n 200) (♂). The female 3nRR produced haploid, diploid eggs, whereas the male infertile. aim present study to explore fertility potential candidate genes 3nRR. Results Gonadal tra...

This study was carried out to determine some reproductive characteristics of the fantail goldfish Carassius auratus females (standard length 69-224 mm. and total weight 21.1- 255.35 g.) from rearing ponds in Basrah province, Southern Iraq. Standard length, weight, gonad absolute fecundity, relative gonadosomatic index (GSI) egg diameter were determined October 2010 April 2011 77 females. Result...

The spectral sensitivities of retinal cones isolated from goldfish (Carassius auratus) retinas were measured in the range 277-737 nm by recording membrane photocurrents with suction pipette electrodes (SPE). Cones were identified with lambda max (+/- S.D.) at 623 +/- 6.9 nm, 537 +/- 4.7 nm, 447 +/- 7.7 nm, and about 356 nm (three cells). Two cells (lambda max 572 and 576 nm) possibly represent ...

Goldfish in a warm environment can cause a small drop in the temperature of their environment by pressing a lever. The fish regulate the temperature of their environment, keeping the temperature between 33.5 degrees and 36.5 degrees C most of the time.