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Aquaculture Studies 2012, Vol 12, Num, 2     (Pages: 007-016)

The Black Sea Trout (Salmo trutta labrax Pallas, 1811)'s Embryonic Development Stages

Şirin FİRİDİN 1 ,Eyüp ÇAKMAK 1 ,Nilgün AKSUNGUR 1

1 Su Ürünleri Merkez Araştırma Enstitüsü, P.K.129, Şana, Trabzon DOI : 10.17693/yunusae.v2012i21909.235437 Viewed : 3844 - Downloaded : 2555 In this study, the Black Sea trout (Salmo trutta labrax Pallas, 1811)'s dry method, fertilization and embryonic development following fertilization in the eggs of the larvae was to examine the morphological evolution. In this study five females and five males were used for breeding hatchery Black Sea trout origin. In the broodstock selection for fish are preferred close to each other in terms of size, weight and egg diameters. In the study, an experiment group which are weighted 400 g and a control group which is weighted 274 g are used. Egg diameters were measured 0.51±0.01cm in average, the sampling process has a total of 94 days. Sampling procedure before fertilization, after fertilization and after being fertilized for 24 hours each day. The second for 24 hours with four hours of sampling were made at the same time each day in the subsequent days are to be examples. Example of at least 5 eggs fixative solution was waiting for. Thus, in embryonic tissue and preventing unwanted formation of disorders of tissue structure has been retained in the most efficient manner. Then the image under the microscope with a computer linked to larval development was followed. The examples of eggs before being fertilized, the out of the embryonic development and larval stages until the first feed at the phase changes detected by the image has been recorded. In this study, the fertilization rate of 96.53%, eyein grate of 96% and hatching rate of 94% was identified as survival rate of 79% until nutrients accompletely exhausted. From free-swimming stage to fertilization the all stages were collected at the six phases. Keywords : Salmo trutta labrax, Development, gastrula, somitogenesis