Study on the growth and development of vertebrae and appendicular skeleton in larval and juvenile Larimichthys crocea
In order to explore the growth and development of the vertebrae and appendicular bones of Larimichthys crocea,the vertebrae and appendicular skeletons of L.crocea(1 to 30 days of age)were observed.The results showed that:the notochord of larval and juvenile L.crocea was tubular,with obvious segmentation from 2 to 5 days of age,the medullary arches began to differentiate and develop at 9 days of age,the haemal arches began to differentiate and develop at 13 days of age,notochord was completely segmented,at 17 days of age back ribs and abdominal ribs became clear,medullary spines and haemal spines also extended by the medullary arches and haemal arched endings completely formed,at 18 days of age juvenile L.crocea vertebrae began ossification,until complete ossification at 27 days of age.The odd fin of L.crocea formed in the order of caudal fin,anal fin and dorsal fin.The caudal fin began to develop at 7 days of age,the first caudal inferior bone formed until 13 days of age when the hypural began to heal and the caudal fin bar appeared,the epural began to develop at 15 days of age until 19 days of age when the urostyle,epural and hypural all formed.The caudal fin bars became gradually clear,gaps between the 3rd and 4th hypural divided the caudal fin into two parts,caudal fin morphology was initially fully developed.From 27 to 30 days of age,the urostyle occured first with starting ossification.Secondly,the hypural and fin strip began to ossify.At 14 days of age,for L.crocea larvae,8 anal fin skeletons appeared,at 17 days of age,8 fins growed.At 20 days of age,the hard spines differentiated,until 25 days of age,the anal fins were fully developed,the fins and hard spines were completely ossified.At 17 days of age,1 row of branch fin bones appeared on the back of the juvenile fish body.The dorsal fins began to develop.At about 20 days of age,all 10 hard spines of the first dorsal fin appeared,the second dorsal fins basically appeared,From 21 to 25 days of age,hard spines were gradually ossified from anterior to posterior and the fin bars were fully developed.During the skeletal development of L.crocea,spinal lordosis,vertebral fusion,bifurcation and redundancy of veins appeared.The results can enrich the developmental biology theory of L.crocea and provide a theoretical basis for the treatment of abnormal bone development in fish.
Larimichthys croceajuvenile fishspine developmentappendage bone developmentskeletal deformity
万方数据
维普
