Breeding and early ontogeny of <i>Siphonogobius nue</i> in captivity

Sonoyama Takayuki, Arao Kazuki, Sakai Harumi

doi:10.11233/aquaculturesci.70.17

<p>Breeding habits and early ontogeny of Siphonogobius nue were observed in aquarium. Three males and five females spawned nine times from April 2 through July 27 in 2011, and a single pair spawned eight times from March 30 through July 12 in 2012, under the water temperature 12.0-23.5°C. Clutch size per spawning ranged from 1603-2461. Transparent fusiform eggs hung in a layer from the ceiling of the spawning nest of the guarding male. Egg size was 3.80±0.07 mm (n=20) in the major axis and 0.93±0.33mm (n=20) in the minor axis. Hatching began about 500 hours after spawning under the water temperature 12.2°C. Total length (TL), and number of myomeres (n=10) were 4.90±0.23 mm TL, and 13+19-20=32-33, respectively. Mouth and anus had already opened but the yolk still remained. After hatching, 20-50 individuals/ml of Brachionus plicatilis were fed. Artemia salina was given 8 days after hatching. 55 days after hatching, they reached the juvenile stage at 36.40 mm TL. Specific characteristics of S. nue larvae are as follows: number of myomeres 32-33, and three single large dendritic melanophores on the ventral side of the trunk above the anus, dorsal, and ventral sides of the caudal peduncle.</p>

Breeding and early ontogeny of <i>Siphonogobius nue</i> in captivity

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