Labridae: K III B8
Halichoeres lapillus Smith 1947, Stethojulis interrupta (Bleeker, 1851) & Coris caudimacula (Quoy & Gaimard, 1834) among others
Jewelled wrasse, cutribbon wrasse, spottail coris
|
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 |
|
550-670 |
1 |
120 |
clear |
narrow |
bow |
58% of NL |
25-26 |
Egg: The small size and oil globule position in the bow, makes these eggs distinctive, but at the same time indistinguishable from Type 1 larvae of KIIIB7. The embryo has black pigment running down its length, and similar spots cloud the oil globule (A). The eggs in A1 were from a tank spawning of Halichoeres iridis. Being small eggs, they often hatch while the sample is being processed in the evening, especially in summer. Incubation is 22-26 hours, assuming evening spawning.
Larva: The 2 day larva has 5 black pigment blotches, the first on the snout, as illustrated in B, but also distinguishable in B1. Both dorsal and ventral finfolds, at this stage, have a serrated edge (B1, but better seen in B2). B, B1 & B2: 2 days, C: 3-4 days (23°C).
The spiny or serrated finfold edge, is a feature of some early wrasse larvae. Ikeda and Mito (1988), illustrated it on Labroides dimidiatus, Stethojulis interrupta and Halicoeres tenuispinis, and Jones et al (2006), for Thalassoma bifasciatum.
Six larvae have been sequenced , 4 matching 2 adult Halichoeres lapillus, 1 matching 5 adult Coris caudimacula; and 1 matching 4 adult Stethojulis interrupta, all adult material collected locally (BOLD reference).
| Linked samples | Offshore | Inshore |
| Eggs | 3430 | 3811 |
| Hits | 183 | 243 |
This was the 13th most common egg off Park Rynie (Table 2: Introductory Notes). The lack of a clear spawning season (blue graph), may, however, be due to the presence of at least two species. The egg was also common in the DHM samples, with a similar scatter over the year (green graph). Presence off Park Rynie over the past 19 years, has shown a steady increase (white graph). The Park Rynie linked sampleshad more eggs inshore (53%), indicating a species that mostly spawns within about the 30m contour. See Section 7.3 and Table 1 of the Introductory Notes, for more information on the linked samples.