Table 7.
Parameters used for estimation of the presence or absence of micropylar sperm attractant (MISA) in fish egg.
| Species (Micropyle type) | Staining (+) or no staining (–) of micropylar region by treatment | Loss of staining ability of micropylar region by trypsin | Efficiency of sperm entry in micropyle is affected (+) or not affected (–) by extracellular Ca2+ | Presence (+) or absence (–) of MISA | |
|---|---|---|---|---|---|
| CB | FITC-WGA | ||||
| Herring (I) | + | + | Yes | + | + |
| Flounder (I) | + | + | Yes | + | + |
| Trout (II) | + | + | Yes | + | + |
| Anchovy (II)a | – | + | Yes | + | + |
| Goldfish (III) | – | –b | NA | – | – |
| Loach (III) | – | –b | NA | – | – |
| Zebrafish (III) | – | –b | NA | – | – |
aNote that anchovy micropyle is not stained by CB, but is stained by FITC-WGA.
bOther FITC-conjugated lectins tested (ConA, UEA, RCA, and LCA) did not stain micropylar region of eggs of these fish.
NA: not applicable