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Larvae Information Summary for  Gonostoma atlanticum
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Main Ref: Watson, W. 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 3.5      
Preanal L. % TL 60 55    
Place of development planktonic
Larval area Northeastern Pacific (California Current Region); Mid-Atlantic Bight; Northwestern Pacific (N Taiwan Strait, Japan)
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail  
Other melanophores on tail  
Post larvae
Striking feature light organs
Striking shape lateral normal (not striking) dorsal  
Striking feature light organs
Shape of gut spherical or gut loop
Gas bladder   early pigmented late pigmented
Spinal armature   early no spines late no spines
Pigmentation early
Rows on tail ventral row
Other melanophores on tail one dorso-ventral cluster or band
Melanophores on head + trunk melanophores on trunk
Pigmentation late
Rows on tail ventral row
Other melanophores on tail one dorso-ventral cluster or band
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early unpigmented late unpigmented
Peritoneum with row of melanophores
Pectorals normal melanophores at fin base
Pelvics fin rays only without melanophores
Anal fin origin slightly anterior to dorsal fin origin; no adipose fin; photophores form more suddenly than in G. elongatum; photophores present; characteristic loop in hindgut below prominent gas bladder; oval eye; pigment on ventral margin of tail, dorsally on gas bladder, and laterally on gut; no internal parhypural pigment. Pigmentation: Preflexion-flexion: series of 5-13 along ventral margin of tail; sparse ventrally on caudal finfold; over gas bladder after about 4 mm; pair along sides of gut just behind pectoral fin; present or absent on hindgut loop. Postflexion-transformation: 17-18 in ventral tail series; double row forms along anal fin base; row along each side of gut from pectoral to hindgut; increasing over entire gut area during transformation; few on caudal peduncle near hypural edges; pair anteriorly on midbrain by about 6-7 mm; on hindbrain by about 11.5 mm; increases on head. Sequence of fin development: caudal, anal, dorsal, pectorals and pelvics.
Meristic characters
  max min mod Ref.
Total number of myomeres 40 37 38 35800
Preanal number of myomeres 19 17   35800
  L 1st feeding Ref. Months of presence of larvae  
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Luna,Susan M. - 08.08.00
Modified by: Luna,Susan M. - 08.01.03
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