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Table 1 Description of gonadal development stages used in macroscopic analyses of males and females of Grapsus grapus

From: Biology of Grapsus grapsus (Linnaeus, 1758) (Brachyura, Grapsidae) in the Saint Peter and Saint Paul Archipelago, Equatorial Atlantic Ocean

Stage

Females

Males

Immature

Not visible. Hepatopancreas highly developed

Not visible. Hepatopancreas highly developed

Developing

Small ovaries; light yellow to light orange

Vas deferens clearly visible; translucent to whitish

Hepatopancreas developed

Hepatopancreas developed

Mature

Ovaries larger; orange to red with distinct oocytes. Ovaries occupying most of the available cephalothorax space, at least 1/2 of the size of the hepatopancreas

Testes convoluted to enlarged and sinuous, white, at least 1/4 of the size of the hepatopancreas