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Larvae Information Summary for
Cottus asper
| Main Ref: | Morrow, J.E. 1980 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 5 | |||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | southern California to Gulf of Alaska | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Larvae planktonic for the first 30 to 35 days. | ||||
Post larvae
| Striking feature | ||||
| Striking shape lateral | dorsal | |||
| Striking feature | ||||
| Shape of gut | aberrant | |||
| Gas bladder early | late | |||
| Spinal armature early | late | opercular spines only | ||
| Melanophores on head + trunk | melanophores on trunk | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Peritoneum | without melanophores | |||
| Pectorals | normal | |||
| Gut shape unique, posteriorly forked (Ref. 265) Pigmentation: dorsal and ventral gut surface; postanal ventral midline series decreasing in number and becoming more evenly spaced with development (Ref. 265). Sequence of fin development: pectorals and pelvics by 10 mm S (Ref. 265). | ||||
| 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 |
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