scholarly journals Effect of peripartal feeding strategy on colostrum yield and composition in sows1

2014 ◽  
Vol 92 (8) ◽  
pp. 3557-3567 ◽  
Author(s):  
R. Decaluwé ◽  
D. Maes ◽  
A. Cools ◽  
B. Wuyts ◽  
S. De Smet ◽  
...  
Keyword(s):  
Feeding Strategy

SIZE-DIVERSITY TRENDS AND FEEDING-STRATEGY DISTRIBUTIONS IN BRACKISH-WATER ICHNOFOSSILS

2016 ◽  
Author(s):  
Murray Gingras ◽  
◽  
Eric R. Timmer ◽  
Eric Ditzler ◽  
John-Paul Zonneveld ◽  
...  
Keyword(s):  
Brackish Water ◽  
Feeding Strategy ◽  
Size Diversity

Diet and sexual maturation of the neon flying squid Ommastrephes bartramii during autumn and spring in the Kuroshio–Oyashio transition region

2008 ◽  
Vol 88 (2) ◽  
pp. 381-389 ◽  
Author(s):  
Hikaru Watanabe ◽  
Tsunemi Kubodera ◽  
Taro Ichii ◽  
Mitsuo Sakai ◽  
Masatoshi Moku ◽  
...  
Keyword(s):  
Transition Region ◽  
Sexual Maturation ◽  
Prey Species ◽  
Feeding Strategy ◽  
Ommastrephes Bartramii ◽  
Neon Flying Squid ◽  
The Difference ◽  
Diaphus Theta ◽  
The Kuroshio ◽  
Prey Items

Diet and sexual maturation were examined in the winter–spring cohort of the neon flying squid, Ommastrephes bartramii, during its southward migration through the Kuroshio–Oyashio transition region of the western North Pacific. The main prey items are micronektonic animals and small pelagic fish, which were abundantly distributed throughout the study area. Among the prey species, O. bartramii was dependent on the Japanese anchovy Engraulis japonicus, which also migrate from the northern to southern transition region during the winter, and the micronektonic squid Watasenia scintillans throughout the study period. Other common prey items were Gonatopsis borealis, Diaphus theta, and Ceratoscopelus warmingii from October to November or December, and Tarletonbeania taylori after December. These dietary changes can be explained by the difference in the seasonal north–south migration patterns of the predator and prey species. Male sexual maturation progressed throughout the season, and most individuals were fully mature in January. In contrast, most of the females were immature throughout the study period. The feeding strategy of the squid in relation to their seasonal north to south migration and sexual maturation was discussed.

scholarly journals Modelling the egg components and laying patterns of broiler breeder hens

2016 ◽  
Vol 56 (7) ◽  
pp. 1091 ◽  
Author(s):  
Nayara T. Ferreira ◽  
Nilva K. Sakomura ◽  
Juliano César de Paula Dorigam ◽  
Edney Pereira da Silva ◽  
Robert M. Gous
Keyword(s):  
Egg Production ◽  
Feeding Strategy ◽  
Simulated Data ◽  
Egg Yolk ◽  
Broiler Breeders ◽  
Broiler Breeder ◽  
Reproductive Process ◽  
Breeder Hens ◽  
Laying Performance ◽  
Broiler Breeder Hens

There is scant information about the reproductive process in broiler breeders, with which to develop a feeding strategy that will be economically optimal for these birds. This study aimed to model the egg production of a flock of broiler breeder hens, using non-isometric equations. The number of eggs produced by 60 broiler breeder hens aged 24–60 weeks was monitored, as was the weight of these eggs and the weights of the components, yolk, albumen and shell. Oviposition sequences and the number and length of pauses between sequences were analysed. Non-isometric functions were applied to predict the weight of the egg; yolk weight was predicted from the age of the hen, while albumen and shell weights were predicted from yolk weight; and egg weight was obtained by summing the component weights. The incidence of soft-shelled and double-yolk eggs was also determined. Yolk weight (YW, g) can be described as YW = 18.03 × (1 – e–0.015 × (t – 103.4)) × e(0.001 × t), where t is the age of the bird (days). The weights of albumen (AW) and shell (SW) were based on YW predictions as follows: AW = 14.38 × YW0.375 and SW = 0.358 × (YW + AW)0.687. The rate of double-yolk egg (DY) production is described by DY = 2.28 × e(0.209 × TFE), and the rate of soft-shelled egg (SS) production by SS = 1.126 + 0.148/(1 – 0.024 × TFE) – 0.056 × TFE, as a function of time from first egg (TFE). On the basis of the results obtained, the model developed here is an accurate reflection of the changes that occur in the number of eggs produced by broiler breeders, as well as in the egg itself and in its components over the entire laying period. This model can thus be used in predicting the nutrient requirements of individual broiler breeder hens, which, when combined with simulated data from a large number of individuals, will accurately describe the laying performance of a flock of broiler breeders.

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