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Larvae Information Summary for  Bathylagoides argyrogaster
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Main Ref: Olivar, M.P. and J.M. Fortuño 1991
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)        
Preanal L. % TL        
Place of development  
Larval area Benguela Current Region
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail no rows
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on trunk
Post larvae
Striking feature none
Striking shape lateral eel-like dorsal  
Striking feature none
Shape of gut tube-like
Gas bladder   early   late  
Spinal armature   early no spines late no spines
Pigmentation early
Rows on tail no rows
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on trunk
Pigmentation late
Rows on tail no rows
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Peritoneum without melanophores
Pectorals normal without melanophores
Pelvics normal (i.e. small or absent) without melanophores
Elongate body; gut extends over approximately 80% of SL. Head is elongate, head length increases with larval development. Transverse rugae develop on the gut, first on the terminal section, later over the entire length of the gut. The eyes are sessile and slightly oval in the early stages, becoming round in the later stages of larval development. Pigmentation: 7-8 melanin pigment patches dorso-lateral to the gut. Presence of dorso-ventral streaks of pigments on the notochordal tip in several specimens. By 10 mm, a considerable number of melanophores is visible over the entire body and head. The gut and caudal peduncle are devoid of pigmentation. Sequence of fin development: caudal; anal fin; dorsal; pelvic.
Meristic characters
  max min mod Ref.
Total number of myomeres 44 43   29072
Preanal number of myomeres 37 36   29072
  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. - 03.11.01
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