Các giai đoạn phát triển phôi và ấu trùng của cá khoang cổ lưng yên ngựa – Amphiprion polymnus (Linnaeus, 1978) trong điều kiện thí nghiệm

Abstract

    Amphiprion polymnus (Linnaeus, 1978) belongs to the group of spawning fish. Fish lay eggs on substrates that are placed in the spawning tank under artificial feeding conditions. The breeding pairs care for embryos and larvae during hatching. Observations were made under laboratory conditions at 27-28°C; salinity 33-34‰.

    The present study describes the embryonic development and early ontogeny of Saddleback Anemonefish from fertilized eggs to a lavar. Stage of oocytes and egg activation marked by a cell in the animal pole (1h30' post fertilization). The cleavage occurs only in the embryonic region at the animal pole; dividing the blastocyst into multiple blastocysts until the blastocysts 64 blastocysts on the embryo plate (5h20’). The end of blastocyst stage is the disappearance of the ligament and the embryonic cells partially cover the yolk sac (18h15’). At the end of the gastrula stage, the nerve and eye buds appear at the animal pole (1 day 3h20'). The organs and nervous system, circulation, digestion, excretion gradually formed and continued to improve after the fish hatch (7 days 5h20' post fertilization).