Figure 1From: Secretory activity of mandibular organ fluctuates in response to reproductive season of the field crab Paratelphusa sp. (Brachyura; Decapoda): an ultrastructural study Non-yolky and yolky oocytes during non-reproductive and reproductive seasons. (a) shows non-yolky oocytes, NY (non-reproductive season). (b) shows yolky oocytes (Y) usually occur during secondary vitellogenesis (reproductive season).Back to article page