Figure 1

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).
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).