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National Repository of Grey Literature 2 records found  Search took 0.02 seconds. 
Verifying the suitability of two different lines Amur mirror carp to produce commercial hybrids of common carp breed with M2 on maternity position - wide-area test
 VOJTĚŠEK, Zbyněk
The main aim of this work was to compare the survival and growth of common carp hybrids using two lines of Amur mirror carp. The test was created using the top cross breed with M2 on the maternity position. On the maternal line were crossbreeded males M2 (for the production of pure breed to verify the heterosis effect), the Nordic mirror carp M72, and two lines of Amur mirror carp (Alp - bred in Pohořelice and Alv - bred in Vodňany). As a control, the breed of hybrid Ropšín scaly carp and carp Tataj were used. The test was conducted at five locations from planting of the yolk sack (K0) until rearing up to the market size K3. During rearing regular catches were carried out, in order to control the growth and survival. After the subsequent determination of the corrected weight and survival for better quality of evaluation were determined. Consequently, some differences were found between the breeds and heterogeneous effect was fixed. After evaluating the test, where the lines crossed on the parent breed M2 achieved better results than pure-bred lines, I would not recommend this line for commercial breeding. In contrast, both lines of Amur mirror carp could be very well used for commercial farming, mainly due to higher resistance of hybrids to KHV.
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Comparison of biometrical and slaughtering indicators of crossbreeds of common carp with using two different breeds of Amur mirror carp
 PRCHAL, Martin
The objective of this thesis was to compare biometrical and slaughtering indicators of common carp crossbreeds using two different breeds of Amur mirror carp in performance testing. We applied top-crossing for the test establishment, using the Hungarian mirror carp (M2) on the maternal position. Males of Hungarian mirror carp (for the production of purebreed), Northern mirror carp (M72) and two breeds of Amur mirror carp (ALP ? bred in Pohořelice, ALV ? bred in Vodňany) were crossed on this breed and hybrids of scaly phenotype between Ropsha (ROP) and Tata carp (TAT) were used as a control group. The performance testing started in ponds (in the total of five localities) in the semi ? intensive way of management by releasing yolk sac fry (K0) and its subsequent rearing to the market size (K3). The performance test was completed in ponds after the third year of testing and the tested groups of fish were evaluated for biometrical and slaughtering indicators. In the overall evaluation of the edible parts of the body (processed body and fillets) by the ANCOVA method was not found a statistical difference among the mirror tested groups of fish. The only exception was the proportion of fillets without skin, which was significantly higher in the hybrid M2 x ALP than in breed M2, therefore I would not recommend this breed (M2) to commercial breeding. When comparing my results with other publications, the hybrid M2 x M72 could be used for commercial breeding together with the two hybrids of Amur mirror carp, who not only achieve high yield of edible parts of the body, but also the earlier tests confirmed higher growth, better survival and resistance to the KHV virus.
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