Muscular Rigidity
"muscle stiffness." In the body there is a coming and going. The food is taken and is transformed into molecules or energy. The structures of them are very complex and the processes of absorption and decomposition too hard. In an extraordinary way, the body can absorb and decompose, to incorporate and remove, keeping in balance.
Therefore, a trained corps has learned to allow a certain rate of synthesis, decomposition and nutrient use. This rhythm is generated us in our pigeon fanciers, when we fly on time in the day and we have optimal conditions, with a feeding method appropriate for the flight is in the program.
But from the time our dove is in the carrying case and can not fly as usual, at the normal time, breaking his usual pace and the supply of nutrients into the muscle continues. The decomposition which releases energy for muscular movement, does not occur. Therefore it is possible that after several nights in the basket, the muscles are flooded with glucose, so to speak. When the dove
then begins to fly, it is possible that the muscles on acidify, because lactic acid is formed in such quantities that the body can not break it down so quickly.
What we see, reminds me of what we saw after the death of animals killed. The muscles are stiff, shrink and reach a high level of acidity.
For doves in this state, we determine difficulty getting out to fly from the ground.
Some even do not. You can see that the pigeon makes rapid involuntary movements with its wings. Take the bird in the hand and muscles feel hard and rigid wings.
When I read this, I was surprised. With so much written, I disagree. I regret having to say so. But there are some justifications for the author. Classes of veterinarians previously dealt only with large mammals and especially with horses. But it has been given increasingly that birds are very different from mammals, for example in the field of breath, energy synthesis, regulation of temperature, etc.
I think the writer was based on the views of Prof. J. Wester (Univesidad of Utrecht), in his book "bij de grote huisdieren Orgaaniziekten (Organic diseases of domestic animals above). He wrote in it about "muscle degeneration, a disease that almost only be determined in horses pulling heavy. Naturally, there will be more of this illness (often).
muscle degeneration was present in horses that were fed enough and regularly had to work and which, after a few days of rest, which also had been fed abundantly, were again put to work. We determined an abnormal development of lactic acid in your muscles. Prof. Wester explained it this way: "The muscle glycogen content of the horse is already high. But when, during a period of rest, continue to feed heavily, further increases this content. If it starts working again, then by muscle contraction, suddenly comes to muscle tissue, too much lactic acid from glycogen (via glucose).
This acid lactic acid can not be transported quickly enough or burned, which results in that the muscle fiber degenerates, it becomes rigid and hard, then the animal falls (degeneration products are circulation and thence to the kidneys, urine that is stained red).
Due to typical development of the disease (rest over the weekend and again work on Monday) is also called "Monday disease". The veterinarian recommended for pigeons, Prof. Wester treatment recommended for horses, "the over-acidification of the muscle, fighting with baking soda.
Now I want to deal in This article in rigidity of the muscles in pigeons. If this occurs in pigeons, as previously written, do not come home no dove of Barcelona, \u200b\u200bbecause on this flight has to have a layup time of at least 5 days, which can easily be 6 or 7 days, with a postponement of the release.
is not true that during the stay in the basket, the muscles are full of sugar, one reason among others, why not, it is because during this time the power is relatively low, so that the requirements that the Metabolism, are satisfied.
Glucose is released from the digestion circulation and will not accumulate, or the muscle or blood, as stated by the veterinarian. The mammals and birds, have in any case of a complex regulatory mechanism, which is responsible for the content of glucose in the blood, moving in a narrow range. On the other hand, excess is stored as reserves (glycogen) and as soon as they are deficient, it moves a portion of the reserves.
In another paragraph, write the veterinarian on what happens when the muscles contract on the flight and compare this with what can be determined in animals sacrificed. My opinion is that both things can not be compared. In a slaughtered animal, the heart has stopped and he bleeds. The animal is dead, but the cells and tissue yet. So that during cooling, muscle contractions are a long time. These result in the formation of lactic acid and because there is no blood circulation, must remain the lactic acid in the site. No oxygen comes naturally, so that lactic acid can not be burned. With dying and dead muscle, which passes the vet says, they become rigid, contract and reach a high degree of acidity, they are on acidified. This is what is called "rigid bodies."
But a dove flying, the situation is totally different. For his twitching, he eventually formed lactic acid, not resting on the site. This is transported in the blood and because of the presence of oxygen to other sites, transformed back into glucose (glycogen) or burned (a H2CO3 and water). Not present any of acidification. An over acidification of the tissue and blood, is not presented for other reasons. First, it is known that glycogen stores in the pigeon are small and used only at startup, to land or rapid flight maneuvers. For flights that require average speeds and consistent performance, change to another class of stocks, such as fat, with its burning releases energy, without forming lactic acid or other acid (but carbonic acid: H2CO3 and water). This is not just a theory, it was found by two German scientists anesthesia (Bordel and Haase, 1993), who investigated pigeons participating in real powers of flight, at different distances (some even at 620 km): they did not determine no increase in the amount of glucose and the amount of lactic acid in the blood (measured immediately at the end of the flight).
What do I think I on this?. With the above consideration, it is clear that a healthy pigeon is fully capable to avoid an over acidification of muscle. This can be done, thanks to the good functioning of your respiratory system and circulatory system (heart).
But we know that there are large differences in pigeons, with respect to its ability to fly. Usually we differentiate three major categories: short, medium and long distances, according to the distance that normally fly and in which they specialize. This corresponds to distances up to 200 km, up to 500/600 Km. and above it.
Flight conditions extremely difficult, we went back to having last year made us to deal better classify more pigeons in the amount of hours of flight, the pigeons had to endure.
The pigeon really good background, you can fly all day without rest, from the gray dawn, until the evening darkens. When she came home, is able to start your flight again before sunrise and finish the job.
A lot of doves are pigeons label background, fail to give this performance. Due to what? This is very complex. I believe in the constitution of the body, wing and muscle. Can not forget: the amount of energy and water reserves, which can be taken to begin the flight. All this is not easy and can be seen externally. He really knows when they have done a really difficult flight background. Solo practice shows the difference clearly.
regard to medium distances, there are a lot of middle-distance flying, of which the rapid creation, which most can fly much farther, to its normal distance. But a year 1995 brought disappointment to many fanciers. Pigeons with good weather (for example, 1,300 m / min.) And were in the lead at distances of approximately 550 km, failed completely in the same distance, with flight speeds of 1,000 m / min. A flight time of two hours, was then too. These are typical conditions under which animals are totally exhausted and eventually lost.
How do I view the problem of rigid wings? When a pigeon used all their reserves to return home and their strength is running out, something happens to your muscles. There are then signs of degeneration. The muscle fibers are deteriorating, they lose their flexibility, they are rigid. The problem is in the muscle fibers and not in the tendon or joint. The question then arises about the future of these birds. For me would have no future, but would have to withdraw indispensable. Firstly because of them as flying, and can not wait. Besides, who wants to form a baseline should not include pigeons as a result difficult flight, have wings rigid. If one plays with them, risk being poor creep characteristics (with limited capabilities) and they gradually spread throughout the group. These pigeons can at most be used in the reproduction of a pigeon, for short distances.
By: Prof. Dr. G. Van Grembergen
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