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Embryonic and larval development of black skirt tetra ( G ymnocorymbus ternetzi, B oulenger, 1895) under laboratory conditions
Author(s) -
Çelik İhsan,
Çelik Pınar,
Cirik Şükran,
Gürkan Mert,
Hayretdağ Sibel
Publication year - 2012
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2011.02930.x
Subject(s) - biology , hatching , blastula , epiboly , larva , metamorphosis , broodstock , embryogenesis , juvenile , zoology , yolk sac , anatomy , yolk , fishery , gastrulation , embryo , ecology , aquaculture , fish <actinopterygii>
The embryonic and larval development of black skirt tetra, Gymnocorymbus ternetzi , are described under controlled laboratory conditions. In addition, major histomorphological changes and the allometric growth patterns during larval development have been described. The laboratory‐reared broodstock, that is 1 year of age, were spawned. Hatching occurred 20–21 h after spawning at 24 ± 0.5°C. The cleavage was finished in 2 h and the early blastula stage occurred at 2:04 hours after spawning. The gastrulation started at 3:20 hours and 30% epiboly was observed at 3:34 hours after spawning. Eight‐somite stage was observed at 08:33 hours. And embryonic developmental stage was completed at 21 h after spawning. The newly hatched larvae were 1442 ± 14.3 μm in mean total length ( TL ). The mouth opened at 3 days after hatching ( DAH ). The yolk sac had been totally absorbed and the larvae started to swim actively within 3–4 days. Notochord flexion began at 11 DAH . The metamorphosis was completed and the larvae transformed into juveniles at 32 DAH . In this paper, the full developmental sequence from egg to juvenile of G. ternetzi is described for the first time.