Table 1.
Number and percent of species and genera characterized by external or internal fertilization and reported to either have a single canonical centriole or two canonical centrioles.
| Fertilization | One Centriole | Two Centrioles | Total |
|---|---|---|---|
| External | 2 species (0.8%), 2 genera (1%) Spratelloides gracilis (Silver-stripe round herring) Engraulis japonicus (Japanese anchovy) |
241 species (99.2%) 199 genera (99%) |
243 species (87.7%) 201 genera (86.6%) |
| Internal | 7 species (20.6%), 6 genera (19.4%) Hydrolagus colliei (Spotted ratfish) Lepidogalaxias Salamandroides (Salamanderfish) Hemirhamphodon pogonognathus Pantodon buchholzi (Freshwater butterflyfish) 3 Poeciliinae Species: Poecilia reticulata, Poecilia latipinna Guppy, and Gambusia affinis (Western mosquitofish) |
27 species (79.4%) 25 genera (80.6%) |
34 species (12.3%) 31 genera (13.4) |
| Total | 9 species (3.2%) 8 genera (3.4%) |
268 species (96.8%) 224 genera (96.6%) |
277 species 232 genera |
| p-value | Species: <0.00001 Genera: <0.00001 |
||
| Ratio | Species: 3.5 (7/2) Genera: 3 (6/2) |
Species: 11.2 (27/241) Genera: 12.6 (25/199) |
|
| RRR | Species: 20.6%−0.8% = 19.8% Genera: 19.4%−1% = 18.4% |
||
| Odds ratio | Species: (7/27)/(2/241) = 0.259/0.008 = 32.4 Genera: (6/25)/(2/1.99) = 0.24/0.01 = 24 |
A Z-score calculator was used to determine the p-value for two population proportions. The species name is provided for those with a single canonical sperm centriole. RRR, Relative rate reduction.