Template-Type: ReDIF-Article 1.0 Author-Name: editors Title: List of CJAS reviewers in 2013 Journal: Czech Journal of Animal Science Pages: I-II Volume: 59 Issue: 1 Year: 2014 DOI: 10.17221/7193-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/7193-CJAS.html File-Format: text/html Handle: RePEc:caa:jnlcjs:v:59:y:2014:i:1:id:7193-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: J. Křišťan Author-Workplace-Name: South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Faculty of Fisheries and Protection of Waters, University of South Bohemia in České Budějovice, Vodňany, Czech Republic Author-Name: A. Hatef Author-Workplace-Name: South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Faculty of Fisheries and Protection of Waters, University of South Bohemia in České Budějovice, Vodňany, Czech Republic Author-Name: S.M.H. Alavi Author-Workplace-Name: South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Faculty of Fisheries and Protection of Waters, University of South Bohemia in České Budějovice, Vodňany, Czech Republic Author-Name: T. Policar Author-Workplace-Name: South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Faculty of Fisheries and Protection of Waters, University of South Bohemia in České Budějovice, Vodňany, Czech Republic Title: Sperm morphology, ultrastructure, and motility in pikeperch Sander lucioperca (Percidae, Teleostei) associated with various activation media Abstract: Spermatozoa morphology, ultrastructure, and spermatozoa motility traits were studied in pikeperch (Sander lucioperca) after activation in various media (AM 1 - 45mM NaCl, 5mM KCl, 20mM Tris, pH 8.5; AM 2 - 100mM sucrose, 20mM Tris, pH 8.5; AM 3 - 100mM sucrose, 1mM CaCl2, 20mM Tris, pH 8.5) during a 48-hour storage period. The spermatozoon was acrosomeless and differentiated into a spherical nucleus (head), midpiece, and flagellum. The nucleus length and width measured 1.83 ± 0.03 and 1.63 ± 0.02 mm, respectively. The midpiece was located laterally to the nucleus and possessed proximal and distal centrioles and 2-4 mitochondria. Flagellar length was 33.2 ± 0.90 µm, and a pair of lateral fin-like structures projections was observed. The axoneme consisted of nine peripheral doublet microtubules and a single central pair. After a 24 h storage in all activation media at all sampling times post-activation (15, 45, 90, and 120 s), spermatozoa motility was significantly decreased. Spermatozoa were motile after the 48-hour storage at all sampling times post-activation only in AM 3. After the 48-hour storage, no motile spermatozoa were observed in AM 2 and AM 1 at 90 and 120 s post-activation, respectively. Differences in spermatozoa velocity varied with activation medium during storage. After the 48-hour storage in AM 1 and AM 2, decrease of spermatozoa velocity at 15 s post-activation was observed, while in AM 3, velocity was decreased only after the 48-hour storage. Pikeperch spermatozoa morphology and ultrastructure was found similar to that of most freshwater teleosts, with differences in the arrangement of midpiece, number of mitochondria, and position of centrioles. Viable pikeperch sperm was observed after the 48-hour storage. Motility of spermatozoa was improved by addition of Ca2+ to the activation medium, where higher spermatozoa velocity was observed. Keywords: spermatozoa motility, spermatozoa velocity, calcium, storage time Journal: Czech Journal of Animal Science Pages: 1-10 Volume: 59 Issue: 1 Year: 2014 DOI: 10.17221/7188-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/7188-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-201401-0002.txt Handle: RePEc:caa:jnlcjs:v:59:y:2014:i:1:id:7188-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: E.G. Salgado-Hernández Author-Workplace-Name: Faculty of Veterinary Medicine and Husbandry, National Autonomous University of Mexico, Mexico City, Mexico Author-Name: J. Bouda Author-Workplace-Name: Faculty of Veterinary Medicine and Husbandry, National Autonomous University of Mexico, Mexico City, Mexico Author-Name: A. Villa-Godoy Author-Workplace-Name: Faculty of Veterinary Medicine and Husbandry, National Autonomous University of Mexico, Mexico City, Mexico Author-Name: J.L. Romano-Muñoz Author-Workplace-Name: National Institute for Forestry, Agricultural and Livestock Research, CENID - Physiology, Ajuchitlán, Mexico Author-Name: A.J. Gutiérrez-Chávez Author-Workplace-Name: Veterinary Medicine, Life Sciences Division, CIS, University of Guanajuato, Guanajuato, Mexico Author-Name: F. Velásquez-Forero Author-Workplace-Name: Children Hospital "Federico Gómez", Mexico City, Mexico Title: Metabolites of vitamin D and minerals in blood and colostrum of primiparous and multiparous dairy cows postpartum Abstract: Concentrations of calcidiol, calcitriol, and minerals in blood serum and colostrum of 14 primiparous and 16 multiparous Holstein dairy cows during short-period prepartum and postpartum were determined and compared. Blood samples were collected between days 5 and 2 prepartum and 6 h, 12 h, 7 and 21 days postpartum. Nearly 66% of primiparous and 71% of multiparous cows had subclinical postpartum hypocalcemia. Prepartum serum calcium (Ca) and inorganic phosphorus (P) were higher in primiparous cows; Ca decreased in both groups at 6 and 12 h and returned to baseline values 7 days postpartum. Calcidiol and calcitriol concentrations were equal on day 5 prepartum in both groups. In multiparous cows, calcidiol and calcitriol concentration increased at 6 h postpartum and remained elevated at 12 h postpartum; there were no changes in primiparous cows for these analytes. The total secretion of Ca in the colostrum from the first milking was similar in both groups and positively correlated with serum Ca at 6 and 12 h after calving. It is concluded that postpartum increases in the calcidiol and calcitriol concentration were a normal response to the decrease of serum calcium concentration only in multiparous cows. The total Ca secretion in the colostrum of the first milking postpartum does not reflect the grade of hypocalcemia. Keywords: calcidiol, calcitriol, calcium, peripartum cow Journal: Czech Journal of Animal Science Pages: 11-18 Volume: 59 Issue: 1 Year: 2014 DOI: 10.17221/7189-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/7189-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-201401-0003.txt Handle: RePEc:caa:jnlcjs:v:59:y:2014:i:1:id:7189-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: A. Svitáková Author-Workplace-Name: Institute of Animal Science, Prague-Uhříněves, Czech Republic Author-Workplace-Name: Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: J. Bauer Author-Workplace-Name: Institute of Animal Science, Prague-Uhříněves, Czech Republic Author-Workplace-Name: Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: J. Přibyl Author-Workplace-Name: Institute of Animal Science, Prague-Uhříněves, Czech Republic Author-Name: Z. Veselá Author-Workplace-Name: Institute of Animal Science, Prague-Uhříněves, Czech Republic Author-Name: L. Vostrý Author-Workplace-Name: Institute of Animal Science, Prague-Uhříněves, Czech Republic Author-Workplace-Name: Czech University of Life Sciences Prague, Prague, Czech Republic Title: Changes over time in genetic parameters for growth in bulls and assessment of suitability of test methods Abstract: Objectives of the study were to examine alternative measures of growth potential of bulls in testing stations, determine whether genetic parameter estimates of such traits changed over time, and examine whether existing methods for performance testing were appropriate. Records from 1980 to 2010 of 44 425 Fleckvieh bulls in Czech progeny testing stations were analyzed. The following traits were examined: weight at the beginning of the test (150th day of age), weight at the end of the test (530th day of age), gain from birth to the beginning of the test, and gain during the test. Fixed effects in five multi-trait animal models were station-year-season groups, linear and quadratic regressions on age, and regression on heterozygosity (proportion of an individual's loci with alleles from different ancestor breeds). Random effects included additive genetic, permanent environment, and residual variances. Separate analyses were conducted in four consecutive time periods (1980-1987, 1988-1992, 1993-1997, and 1998-2010). Across these time intervals, estimates of additive genetic variance decreased for all of the traits, while estimates of residual variances increased. In consequence, heritability estimates for all of the traits decreased over time. This decrease was most apparent for gain during the test, for which heritability declined by more than 50% over the course of the study. Results demonstrate that over three decades, the system of testing came into conflict with genetic improvement of the breed, possibly because the measured traits changed genetically over the course of selection. Regular analysis of the recorded data, re-estimation of genetic parameters in relation to time, and appropriate modification of existing methods of rearing/fattening in station tests are required. When such inspections are neglected, data from the testing stations may not accurately reflect genetic merit of individual animals. Keywords: gain, genetic analysis, progeny test, Fleckvieh, genetic variation during time Journal: Czech Journal of Animal Science Pages: 19-25 Volume: 59 Issue: 1 Year: 2014 DOI: 10.17221/7190-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/7190-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-201401-0004.txt Handle: RePEc:caa:jnlcjs:v:59:y:2014:i:1:id:7190-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: C.Y. Xie Author-Workplace-Name: State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China Author-Name: G.J. Zhang Author-Workplace-Name: State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China Author-Name: F.R. Zhang Author-Workplace-Name: State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China Author-Name: S.H. Zhang Author-Workplace-Name: State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China Author-Name: X.F. Zeng Author-Workplace-Name: State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China Author-Name: P.A. Thacker Author-Workplace-Name: Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Canada Author-Name: S.Y. Qiao Author-Workplace-Name: State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China Title: Estimation of the optimal ratio of standardized ileal digestible tryptophan to lysine for finishing barrows fed low protein diets supplemented with crystalline amino acids Abstract: Optimum standardized ileal digestible (SID) tryptophan (Trp) to lysine (Lys) ratio was estimated for 67-96 kg barrows fed low protein diets supplemented with crystalline amino acids (AA). One hundred and fifty Yorkshire × Landrace barrows, with an average initial body weight (BW) of 67.3 ± 3.2 kg, were used in a 28-day feeding trial. All dietary treatments were based on corn, wheat bran, and soybean meal and were formulated to provide 10.5% crude protein and 12.6 MJ/kg metabolizable energy. The dietary SID Lys was set at 0.61% ensuring that Lys was marginally deficient for barrows of this weight range. Graded levels of crystalline l-Trp were added to the basal diet to produce diets providing SID Trp to Lys ratios of 0.131, 0.164, 0.197, 0.230, and 0.262. There were improvements in weight gain (linear and quadratic effect P < 0.01) and feed intake (linear effect P = 0.04) with increasing dietary SID Trp to Lys ratio. Increased SID Trp to Lys ratio resulted in a decrease in the serum urea nitrogen (SUN) content (linear and quadratic effect P < 0.01). The serum concentration of Trp increased with increasing dietary SID Trp to Lys ratio (linear effect P = 0.03, quadratic effect P = 0.08). Estimates of the optimum SID Trp to Lys ratios were 0.203, 0.197, and 0.214 for weight gain, feed conversion ratio, and SUN, respectively, using a broken-line model while a quadratic model produced optimum SID Trp to Lys ratios of 0.251, 0.224, and 0.249 for the same parameters. The results of this experiment indicate that the SID Trp to Lys ratio for finishing barrows is at least 0.203, which is higher than the SID ratio of Trp to Lys currently recommended by the National Research Council (NRC, 2012). Keywords: tryptophan requirement, pig, performance, amino acid ratio Journal: Czech Journal of Animal Science Pages: 26-34 Volume: 59 Issue: 1 Year: 2014 DOI: 10.17221/7191-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/7191-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-201401-0005.txt Handle: RePEc:caa:jnlcjs:v:59:y:2014:i:1:id:7191-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: Z. Valová Author-Workplace-Name: Institute of Vertebrate Biology of the Academy of Sciences of the Czech Republic, Brno, Czech Republic Author-Name: M. Janáč Author-Workplace-Name: Institute of Vertebrate Biology of the Academy of Sciences of the Czech Republic, Brno, Czech Republic Author-Name: J. Švanyga Author-Workplace-Name: Institute of Vertebrate Biology of the Academy of Sciences of the Czech Republic, Brno, Czech Republic Author-Name: P. Jurajda Author-Workplace-Name: Institute of Vertebrate Biology of the Academy of Sciences of the Czech Republic, Brno, Czech Republic Title: Structure of 0+ juvenile fish assemblages in the modified upper stretch of the River Elbe, Czech Republic Abstract: In August 2007, the 0+ juvenile fish assemblage of the upper River Elbe was surveyed using electrofishing. Thirty-six localities were sampled along a 177 km long section between the towns of Verdek and Brandýs nad Labem (river km (RKM) 136-313). Four localities with natural riverbeds, 14 channelized stretches, nine beaches, and nine backwaters were sampled. Altogether, 4521 0+ juvenile fishes were caught, belonging to 26 species. A decrease in species richness and abundance was evident near Hradec Králové, while decreased species abundance was noted along the navigated stretch below Přelouč. The highest catch-per-unit-effort (CPUE), species richness, and Shannon index values were observed at beach habitats, the lowest in channelized habitats, and intermediate values in backwaters. Generally, rare beach habitats had significantly more rheophilic species than other habitats, while backwaters had significantly more eurytopic species and higher CPUE for limnophilic species. Backwaters and channel habitats, however, did not differ in any other 0+ fish assemblage parameter studied. The study demonstrated the importance of beaches for fish assemblages along navigable channels. Surprisingly, however, backwaters were not confirmed as important nursery habitats. Keywords: YOY fish, fish reproduction, regulation, channeliza Journal: Czech Journal of Animal Science Pages: 35-44 Volume: 59 Issue: 1 Year: 2014 DOI: 10.17221/7192-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/7192-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-201401-0006.txt Handle: RePEc:caa:jnlcjs:v:59:y:2014:i:1:id:7192-CJAS