| FishBase |
Larvae Information Summary for
Bregmaceros bathymaster
| Main Ref: | Stevens, E.G. and H.G. Moser 1996 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 1.8 | 1.5 | 46075 | |
| Preanal L. % TL | 46 | 42 |
| Place of development | planktonic | |||
| Larval area | California Current region | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Rows on tail | ||||
| Other melanophores on tail | ||||
Post larvae
| Striking feature | some dorsal fin rays very elongated | |||
| Striking shape lateral | normal (not striking) | dorsal | ||
| Striking feature | some dorsal fin rays very elongated | |||
| Shape of gut | spherical or gut loop | |||
| Gas bladder early | pigmented | late | ||
| Spinal armature early | no spines | late | no spines | |
| Pigmentation early | ||||
| Rows on tail | ventral row | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head | |||
| Pigmentation late | ||||
| Rows on tail | dorsal + ventral row | |||
| Other melanophores on tail | one dorso-ventral cluster or band | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | pigmented | late | pigmented | |
| Peritoneum | with row of melanophores | |||
| Pectorals | normal without melanophores | |||
| Pelvics | with elongated fin rays without melanophores | |||
| In preflexion stage, head more compressed and snout longer than in Bregmaceros sp.; postanal ventral pigment series lost early, then pattern sparse but distinctive; occipital ray forms later (during early postflexion stage, at 6.5-7.5 mm SL) than in Bregmaceros sp. (during flexion stage, at about 4.0 mm). Pigmentation: Preflexion: at <2.0 mm, shield above developing gas bladder, 5-8 postanal ventral midline series, 1 at angle of jaw, a series on ventral surface of gut, and a blotch above preanal arch of gut; by 3.0 mm, postanal series lacking. Flexion: 1 at nape; 1 embedded in otic region; pair at tip of snout; ventral gut series lacking; by end of stage, some larvae have 1 at hypural margin and an embedded blotch above posterior spinal column. Postflexion: usually a pair above anterior midbrain and above cerebellum; blotches added above spinal column; by 12.0 mm, augmentation above brain, nape, at hypural margin, and spinal column; shield around stomach; beginning of juvenile pigment series dorsally and ventrally on tail. Sequence of fin development: caudal, dorsal, anal, pelvics, pectorals. | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of vertebrae | 51 | 48 | 36382 |
| 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 |
| Back to Search |