Main Ref: | Watson, W. 1996 |
min | max | mod | Ref. | |
Length at birth (mm) | 6 | 8.5 | ||
Preanal L. % TL |
Place of development | planktonic | |||
Larval area | California Current region | |||
Yolk-sac | Ref: | |||
Yolk | Oil globules | |||
Rows on tail | lateral row | |||
Other melanophores on tail | no other melanophores | |||
Melanophores on head + trunk | melanophores on head + trunk | |||
Pigmentation: 3 (large) over midbrain; 1 over hindbrain; 17-21 on dorsal margin to 2nd-6th from last myomere; 0-7 on lateral midline of tail; dorsally on gut. PLD: 24 days (Ref. 56049). |
Striking feature | none | |||
Striking shape lateral | normal (not striking) | dorsal | tadpole-like | |
Striking feature | none | |||
Shape of gut | triangular | |||
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 head | |||
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 | unpigmented | late | pigmented | |
Pectorals | normal without melanophores | |||
Pelvics | normal (i.e. small or absent) without melanophores | |||
Myomeres 50-54, usually 10-11 + 41-42 through flexion stage, 13-14 + 37-38 in postflexion stage; 1st dorsal insertion above or just ahead of anal fin origin; ventral pigment on tail usually does not extend cephalad beyond anal fin origin in larvae (Ref. 36497). Distinguished from Atherinops affinis by: first 5-6 postanal myomeres always lack ventral pigment through the larval and early juvenile stages; lack of ventral midline melanophores until midflexion; mediolateral pigment originates further posterior. Pigmentation: Preflexion-postflexion: 1 over forebrain by 9.5 mm; 1 at each nostril by about 11 mm; on gill cover by about 12.5 mm; increasing on head in postflexion stage; on ventral margin, beginning posteriorly at about 11.5-12.5 mm; internally under vertebral column and over last few vertebrae in postflexion stage; on hypural margin; spreading ventrad on gut. Transformation: increases dorsally; lateral stripe broadens on tail; ventral margin series reaches pelvic fin base; few on caudal fin rays. Sequence of fin development: caudal, 2nd dorsal and anal and pectorals, pelvics, 1st dorsal. |
min | max | mod | Ref. | |
Total number of vertebrae | 50 | 54 | 36497 |
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 |