Table 1.
Comparison of apparent and true levels of infertility in five endangered bird species.
| species | Order | captive (C) or wild (W) | number of eggs collected (no sign of development) | number of eggs with no cells in the GD (infertile) | number of eggs with no cells in the GD or sperm on the PVL | % infertility of non-developing eggsa |
|---|---|---|---|---|---|---|
| helmeted honeyeater (Lichenostomus melanops cassidix) | Passeriformes | W | 4 | 0 | 0 | 0 |
| C | 19 | 6 | 5 | 32 | ||
| hihi (Notiomystis cincta) | Passeriformes | W | 120 | 14 | 10 | 12 |
| orange-bellied parrot (Neophema chrysogaster) | Psittaciformes | C | 146 | 88 | 82 | 60 |
| Spix's macaw (Cyanopsitta spixii) | Psittaciformes | C | 40 | 22 | 19 | 55 |
| yellow-shouldered Amazon parrot (Amazona barbadensis) | Psittaciformes | W | 10 | 0 | 0 | 0 |
aThe number of eggs with no GD cells as a percentage of the number of non-developing eggs examined.