AIMS - Manual for the Determination of Egg Fertilisation in Penaeus Monodon - Section III - Distinguishing Fertilised and Unfertilised Eggs

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Manual for the Determination
of Egg Fertility in Penaeus monodon

SECTION III

DISTINGUISHING FERTILISED
AND UNFERTILISED EGGS

DIFFERENTIATING 1

Differentiating Between Fertilised and Unfertilised Eggs

Characteristic

Fertilised
Egg

Unfertilised
Egg

Cleavage
pattern

Symmetrical

Asymmetrical

Post-1 hour
development

2nd-3rd cleavage
4-8 cell stage

1st cleavage
undivided or
2 cell stage

Other

Rapid cell division
after 1st cleavage

Erratic cell division
after 1st cleavage

Table 3. Characteristics distinguishing fertilised from unfertilised eggs.

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