EMBRYONIC AND LARVAL DEVELOPMENT OF JAPANESE ORNAMENTAL CARP CYPRINUS CARPIO (LINNAEUS, 1758)
Aurelia Nica, V. Cristea, Daniela Gheorghe, G.V. Hoha, Ionica Bancu Enache
The aim of this paper is to describe the development stages of the embryo and most important aspects of larval period at Japanese ornamental carp. Thus, has been characterized seven broad periods of embryogenesis - the zygote, cleavage, blastula, gastrula, segmentation, pharyngula and hatching, respectively. These divisions highlight the changing spectrum of major developmental processes that occur since fertilization to hatching. Stages subdivide the periods and their names are based on morphological features, generally readily identified by examination in microscopy of the live embryo. In the conditions of maintaining water temperature around 22oC, the embryonic development lasted 50 hours. During larval period, the main aspects were following: yolk resorbtion, body pigmentation and completed organogenesis, filled with gas of the swim bladder, fins differentiation, the appearance of active body movements and start of the exogenous feeding.
Key words: Cyprinus carpio, morphogenesis, embryogenesis, larval development