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Embryonic and larval development of Pink ear emperor, Lethrinus lentjan (Lacepede, 1802) under captive conditions

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Relation http://eprints.cmfri.org.in/15176/
https://onlinelibrary.wiley.com/doi/full/10.1111/are.15461
DOI: 10.1111/are.15461
 
Title Embryonic and larval development of Pink ear emperor,
Lethrinus lentjan (Lacepede, 1802) under captive conditions
 
Creator Gomathi, P
Ramachandran, Siju
Anil, M K
Ambarish, Gop P
Surya, S
Raju, B
Raheem, P K
Ignatius, Boby
Gopalakrishnan, A
 
Subject Fish physiology
Fishery Biology
 
Description The present study provides the complete report on the embryonic and larval development
of pink ear emperor, Lethrinus lentjan (Lacepede, 1802). Eggs were obtained from
captive-reared
broodstock of pink ear emperors from 1-year
of age maintained in a 10-tonne
recirculating aquaculture system (RAS). The brood fishes spawned throughout
the year without hormonal induction. Fertilized eggs (692.65 ± 6.67 μm) were pelagic,
transparent, non-adhesive
and with a single oil globule measuring 146.63 ± 3.51 μm.
Description of the different phases of embryogenesis, namely the zygote, cleavage,
blastula, gastrula, segmentation of the fish is provided. Additionally, the developments
during larval development period after hatching, which extends till the completion
of yolk-sac
absorption (pre-larvae)
and the end of metamorphosis (post-larval)
are
also included in the present study. The embryonic development was completed within
14 h 40 min after fertilization. The newly hatched larvae had an average body length
of 1.39 ± 0.08 mm, with a yolk sac measuring 787.67 ± 42.65 μm. The mouth opening
was observed at 2 days post-hatch
(dph). The yolk sac was completely absorbed
by 2 dph, and the preflexion stage began, and it continued till 14 dph. Notochord
flexion began by 15 dph and extended to 20 dph. The appearance of the typical adult
colouration and scale formation started by 22 dph and by 35 dph the larvae reached
the juvenile stage. The data on the embryonic and larval development will help to
standardize the larval rearing techniques for the species.
 
Date 2021
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/15176/1/Aquaculture%20Research_2021_Gomathi%20P_Pink%20ear%20emperor.pdf
Gomathi, P and Ramachandran, Siju and Anil, M K and Ambarish, Gop P and Surya, S and Raju, B and Raheem, P K and Ignatius, Boby and Gopalakrishnan, A (2021) Embryonic and larval development of Pink ear emperor, Lethrinus lentjan (Lacepede, 1802) under captive conditions. Aquaculture Research, 52 (7). pp. 1-13.