Lutjanidae: K III B1
Pristipomoides sieboldii Bleeker, 1857, & Paracaesio sordida Abe & Shinohara 1962.
Lavender jobfish & Rustyfin snapper
Egg diameter in µm |
Number of oil globules |
Diameter of oil globule in µm |
Yolk texture |
Perivitelline space |
Position of oil globule at hatch |
Gut length at eye- pigment stage |
Myomeres |
860-910 |
1 |
100-170 |
clear |
narrow |
bow |
44% of NL |
25-26 |
Egg:. Fine black dots appear on the embryo, in a single line dorsally. On the oil globule, they are few (A). The oil globule is usually oblong, and always untinted. This egg may be slightly oval. In eggs about to hatch, black pigment can be seen on the outer edge of the finfolds. Incubation is 30-35 hours.
Larva: The large stellate black pigment spots in the finfolds, as well as conspicuous spots on the nose, oil globule and anus (C, D & D1), identify this larva. At 2 days (C), the oil globule is tinted orange, and imparts a light tint to the shrinking yolksac. At 5 days, the larva develops a dark line of pigment over the gut, and the finfolds are clear (E). B: NH, C: 2 days, D: 3 days, E: 5 days, (24°C). Note that the photo series on this page is Pristipomoides sieboldii, not Paracaesio sordida.
Attempts to rear this larva were unsuccessful, despite some large batches of eggs. Twentysix larval DNA barcode sequences are currently available, which match 4 adult Pristipomoides sieboldii, from adults collected off Southport and Port Shepstone on the KZN south coast (BOLD ). Another 28 larval sequences match 7 adult Paracaesio sordida (see also KIIIA8) collected locally, and 3 match Paracaesio xanthura. While the latter is probably an error, eggs of P. sordida often have a small oil globule, and the early larva has a similar spread of black chromatophores in the finfold (B & C above), making it difficult to separate from P. sieboldii, until the colour of the oil globule can be checked in the 2-day larva, which was clearly not always done. Notes on differences in the larvae are being made in order to split P. sordida from this page.
This is a summer spawner off Park Rynie (blue graph). It was not seen in the DHM samples. At Park Rynie, the egg has shown a steady presence, after being virtually absent in the first 3 years (white graph). In the Park Rynie linked samples, the eggs were dominant offshore (84%), in the vicinityof the geelbek (LIIA6) spawning grounds. See Section 7.3 and Table 1 of the Introductory Notes, for more information on the linked samples.
|
linked samples |
Offshore |
Inshore |
|
Eggs |
5445 |
1047 |
|
Hits |
|
60 |