Mapping quantitative trait loci (QTL) for body weight, length and condition factor traits in backcross (BC1) family of Common carp (Cyprinus carpio L.)

2013 ◽  
Vol 41 (2) ◽  
pp. 721-731 ◽  
Author(s):  
M. Y. Laghari ◽  
P. Lashari ◽  
X. Zhang ◽  
P. Xu ◽  
B. Xin ◽  
...  
2013 ◽  
Vol 21 (6) ◽  
pp. 1373-1379 ◽  
Author(s):  
Muhammad Younis Laghari ◽  
Yan Zhang ◽  
Punhal Lashari ◽  
Xiaofeng Zhang ◽  
Peng Xu ◽  
...  

Aquaculture ◽  
2015 ◽  
Vol 435 ◽  
pp. 100-105 ◽  
Author(s):  
Youyi Kuang ◽  
Xianhu Zheng ◽  
Weihua Lv ◽  
Dingchen Cao ◽  
Xiaowen Sun

2016 ◽  
Vol 60 (3) ◽  
pp. 287-297 ◽  
Author(s):  
Xianhu Zheng ◽  
Youyi Kuang ◽  
Weihua Lv ◽  
Dingchen Cao ◽  
Zhipeng Sun ◽  
...  

2019 ◽  
Vol 1 ◽  
pp. 88-95
Author(s):  
O O Jacob ◽  
G S Solomon ◽  
P A Annune

Common carp (Cyprinus carpio) germplasm were sourced from Bauchi and Ibadan aimed at studying their hatchability from the various intraspecific crosses and effect of frequencies of feeding on stocking density of Carp fry. Both male and female were injected with Ovaprim at 0.5ml/kg body weight intramuscularly at a single dose. The number of eggs in 1 gram mass was determined, Fertilization rate and percentage of hatchability were calculated. One hundred and eighty (180) fry of Cyprinus carpio were randomly picked and distributed in nine bowls of 50 litres at three stocking densities with replicates for each treatment. The frequencies of feeding were in these order; Ten (10) fry per bowl of 50 litres were fed twice a day, Twenty ( 20) fry per bowl of 50 litres were fed four times a day, Thirty (30) fry per bowl of 50 litres were fed six times a day, respectively for 8 weeks with 30gm of 0.2mm Coppens starter diet. The Ib♀ x Ba♂ cross had the highest hatchability though highest fertilization rate was recorded by Ba♀ X Ba♂ cross. The various crosses had above 50% hatchability, though percentagehatchability differed significantly at (P <0.05). While the growth pattern of the different stocking densities at different feeding frequencies differed significantly (p<0.05). The intra specific crossing of different sexes from the two sources gave a higher yield as can be seen with the IB♀ x BA♂. Whereas carp fry stocked at a lower stocking density with a fewer feeding frequency had best growth.


2020 ◽  
Author(s):  
Eunice Mutethya ◽  
Edwine Yongo ◽  
Cishahayo Laurent ◽  
Edna Waithaka ◽  
Evans Lomodei

The Common carp, Cyprinus carpio is an exotic fish in Lake Naivasha. It is one of the commercially important species in the lake. This study investigated on its biology and population parameters during 2017. Fish samples (433) were caught using gillnets of mesh-sizes 2-5 inches. Length of fish ranged from 12.0 to 69.0 cm TL, and weighed between 32 and 6840 g. The overall population sex ratio was 1.66: 1.0 (male: female). The mean length of females was 34.8 cm and males 32.1 cm. The length at first maturity was calculated at 54.0 and 49.0 cm for females and males, respectively. The mean condition factor for all fish was 1.05. The peak condition values were recorded during April (1.35), September (1.59) and October (1.80). There was a significant difference in mean condition factor within the size classes highest (1.38) and lowest (0.93) values recorded in class 56-60 and 26-30, respectively. The overall asymptotic length (L∞) was 73.5 cm and growth curvature (K) 1.05 yr-1 with growth performance index (Ф) of 3.72. The total (Z), natural (M), fishing (F) mortality coefficients 2.85, 1.34 and 1.78 yr-1, respectively. The exploitation rate (E) of 0.57 was higher than optimum sustainable yield (E0.5) of 0.32, but not different from maximum sustainable yields (Emax) 0.54 and economic yield (E0.1) 0.46. The length at first capture (LC50) was lower than length at first maturity (LM50), suggesting capture of immature fish. This study provides parameters of fish biology and population often useful in fisheries management.


2009 ◽  
Vol 31 (4) ◽  
pp. 407-411 ◽  
Author(s):  
Rui-Xin MAO ◽  
Fu-Jun LIU ◽  
Xiao-Feng ZHANG ◽  
Yan ZHANG ◽  
Ding-Chen CAO ◽  
...  

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