Skeletal development and abnormalities of the vertebral column and fins in larval stage of hatchery-reared American shad,Alosa sapidissima

2018 ◽  
Vol 49 (7) ◽  
pp. 2376-2392 ◽  
Author(s):  
Xiao-Qiang Gao ◽  
Zhi-Feng Liu ◽  
Chang-Tao Guan ◽  
Bin Huang ◽  
Bao-Liang Liu ◽  
...  
Keyword(s):  
Larval Stage ◽  
Vertebral Column ◽  
Skeletal Development ◽  
American Shad ◽  
Alosa Sapidissima

scholarly journals Evasive responses of American shad (Alosa sapidissima) to ultrasonic stimuli

2003 ◽  
Vol 4 (2) ◽  
pp. 25-30 ◽  
Author(s):  
Dennis T. T. Plachta ◽  
Arthur N. Popper
Keyword(s):  
American Shad ◽  
Alosa Sapidissima

Skeletal characters for identification of juvenile Ophiactis resiliens and Amphiura constricta (Echinodermata): cryptic ophiuroids in coralline turf habitat

2006 ◽  
Vol 86 (5) ◽  
pp. 1199-1207 ◽  
Author(s):  
I. Falkner ◽  
M. Byrne
Keyword(s):  
Larval Stage ◽  
Early Stage ◽  
Skeletal Development ◽  
Algal Turf ◽  
Disc Diameter ◽  
Planktonic Larval Stage

Skeletal development of Ophiactis resiliens and Amphiura constricta was examined to determine characters that could be used to identify the juveniles of these species, which co-occur in algal turf habitat. Juvenile O. resiliens recruit to turf after a planktonic larval stage while A. constricta recruit through release from brooding adults. Skeletal development in O. resiliens and A. constricta is typical of most ophiuroids with diagnostic adult characters taking some time to appear. The main characters that can be used to distinguish the two species from an early stage are the number and arrangement of the oral papillae and the presence of disc spines. In O. resiliens diagnostic adult skeletal characters developed at 1.5 mm disc diameter. In A. constricta most identifying adult characters were evident at 700 μm disc diameter. Identification of juvenile O. resiliens is assisted by the presence of disc spines and thorny arm spines, features that disappear as the juveniles grow. Juvenile A. constricta did not develop disc spines or thorns on the arm spines.

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