Cobb 500 and Ross 308 are two of the most popular exhausts on the market today. Both of these exhausts are extremely high-quality and will give your vehicle a great-sounding exhaust, but there are some key differences between them that you should consider before making a decision.
In the following paragraphs, I’m going to compare the Cobb 500 vs. Ross 308 and Abor Acre plus, along with the Hubbard meat Hybrid Flex. Which one is better? What are the differences? And which one is better for your particular situation? You’ll find out after the jump. If you’re interested in comparing the quality of the albumen from the two strains, read on.
The difference in egg energy between Cobb 500 Vs Ross 308 is primarily attributed to the differences in albumen weight. Eggs from both strains contained the same amount of energy, but the Ross 308 had higher albumen weight and more crude fat than the Cobb 500. Their albumen plus yolks had similar crude fat and DM contents, but the Ross 308 embryos had higher CP. The higher CP content might be attributed to the difference in eggshell thickness.
During incubation, the two embryos had different nutrient metabolisms. They differed in the amount of energy they could use, the amount of energy they lost, and the metabolic blood parameters they displayed. Although these differences were not found in the lipid-acid ratio, the results suggest that these embryos had different metabolic processes. Rather than losing energy, the embryos in the Cobb 500 had higher levels of hepatic glycogen, which could help them sustain their development during hatching.
Another difference between the two was the feeds the two varieties ate. Ross 308 is less productive than the Cobb 500, but the Cobb 500 is better for productivity. The company that produced the Cobb 500 managed their flock for 6 years and made improvements every five years to continue to improve productivity. Although the two breeds share the same characteristics, their feeds are different. While the Cobb 500 requires more energy, the Ross 308 has higher protein.
The Cobb 500 Vs Ross 308 comparison was not the only study to consider this. Sterling et al. compared broiler chicks of both breeds and found that the Cobb chickens grew faster than the Ross 308. The differences between the two strains could be due to different genetics. There are several other differences in CP, but not genetic. The researchers also looked at the effects of temperature and strain on egg weight.
Using a commercial hatchery, researchers obtained 120 Cobb 500 chicks and 100 Ross 308 chickens. The females were randomly divided into groups of 10, each containing 10 Cobb 500 chicks. The males were then placed in 24 battery cages with a wire floor. The cages were set up in six rooms with two Cobb 500 and Ross 308 birds in each. Each cage was approximately 122 cm long, 91 cm wide, and 61 cm high.
The genetic differences in the morphology of Ross 308 vs Cobb 500 broilers may have something to do with the rapid growth and fattening characteristics of both breeds. In a previous study, Sterling et al. showed that Ross 308 broilers had greater CP than Cobb 500 broilers but the differences were not associated with intestinal microflora. The present study, however, shows no strain-temperature interactions.
During a test, a flock of Ross 308 turkeys was raised on a diet of corn and soybean meal, as well as corn and oats. The research indicated that the Ross 308 produced more meat than the Cobb 500, but neither weighed as much. The Cobb 500 was considered more durable and robust, but the Ross 308 produced heavier meat. These characteristics also made the Cobb 500 less costly to raise.
Another study concluded that the Cobb and Ross hybrids had similar growth performance, although there was no significant difference in weight. The pH values of the two breeds at 15 min after slaughter were 6.28 and 6.29, respectively. The pH values of the breeds 24 h after slaughter were 6.07 and 6.44, respectively. The results of this study suggest that the Cobb is more suitable for growing broilers than the Ross.
FCR scores are an important factor in selecting a broiler breed, but a more significant factor is the overall mortality rate. FCR values for the Cobb and Ross strains varied widely from 1.13 to 2.07. The cumulative FCR for both breeds was 1.41 and 1.46 respectively. While their average weight was slightly different, both breeds were able to achieve the same yields. However, the mortality rates of the two strains were similar.
Abor Acre plus
The Abor Acre plus has a unique blend of qualities that make it an ideal choice for the broiler market. Its carcass is of high quality and requires minimal maintenance, while its live weight is sufficient for processing. Its rapid growth means that it can be slaughtered at six to nine weeks of age. Similarly, the Ross 308 is an ideal choice for the live weight broiler market.
The Gompertz model underestimated the initial weight of the Arbor Acres Plus. The Cobb and Ross 308 were the two strains with the highest estimated final weight. Nonetheless, both had similar estimated growth rates. In addition, they had similar weights at the time of slaughter. The Arbor Acre plus was more tender and had a slightly higher breast %. Although both strains produced similar meat quality, Arbor Acre plus was found to have a higher weight loss during cooking than the Cobb 500.
Both Cobb 500 and Ross 308 showed similar responses to heat stress. Both strains exhibited higher BWG in the finisher phase. However, the Ross 308 had higher serum IgA levels on day 35. This indicates that despite the lack of significant differences in FI and BWG, the Cobb 500 was the superior choice in this trial. The differences in BWG between the two strains were not largely due to differences in heat exposure.
The body conformation traits of four hybrids of broiler chicken were analyzed. Among them, wing span, body length, chest and back length were positively correlated with the Cobb 500. The Marshall and Ross 308 also showed positive correlations with the body conformation traits of broiler chickens. These hybrids were also favored for the production of large, white meat. In the final analysis, Cobb 500 outperformed both Ross 308 and Marshall.
Hubbard meat Hybrid Flex
The Hubbard meat Hybrid Flex, the Ross 308, and the Cobb 500 are three of the most common hybrids used in the Romanian poultry industry. All three are designed to be extremely cost-effective while delivering high performance. Both are not picky when it comes to nutrient requirements, but they do have different requirements for the protein content of their finished feed. Hubbard Flex needs about 22% PB and the Ross 308 requires a protein level of 25 to 28 percent PB.
The FC of Hubbard birds was higher than that of Cobb birds, and the LW was better than that of the Ross birds. Hubbard birds had the highest FC, and were also superior to the Cobb and Ross strains. The Hubbard birds were smaller in size than either, although they were not significantly different in LW. Hubbard birds were not significantly heavier than their counterparts, so they had a slight edge in this department.
Both the Ross and Hubbard strains had similar carcass traits. Hubbard birds had higher DY and TY than the Cobb strain, and were superior to the Ross birds by 1.6 percent and 11.6%, respectively. The sex of the birds was also a significant factor in determining carcass traits. Hubbard males presented higher CY and TY than Ross and Cobb males.
The Hubbard meat Hybrid Flex scored higher in the carcass conformation parameters compared to the Ross 308. Its average body mass was greater than the other two, and the optimum body weight was reached after 42 days. Although the Hubbard chickens had the highest mortality rate, the other two genotypes were lower in all indices.