Reptiles And Birds In Captivity Flashcards
The five welfare needs
- Suitable diet
- Suitable environment
- Ability to express normal behaviour patterns
- Housed with, or apart from, other animals
- Protected from pain, injury, disease
What is metabolic bone disease
Metabolic bone disease (MBD) is a condition that affects bones and is caused by a variety of factors, including a deficiency of calcium, vitamin D
Why are insectivores at risk of developing metabolic bone disease
Insectivores that primarily feed on insects can be at risk of developing MBD if they are not provided with adequate nutrition.
Insects are often low in calcium and vitamin D
What is Hypovitaminosis A
Hypovitaminosis A is a medical condition caused by a deficiency of vitamin A
Why are insectivores at risk of developing hypovitaminosis A
Because insects are not a rich source of vitamin A
Why are insectivores at risk of obesity
If they are fed too many waxworms which are high in fat and low in calcium
- They should not be fed as the sole or primary food source for insectivores.
- Overfeeding waxworms can lead to obesity
Why are commercial diets sometimes bad for reptiles
Lack of Nutritional Variety
Inadequate Nutrient Levels
Processed Ingredients: Commercial diets for reptiles often contain highly processed ingredients, such as grain-based fillers or artificial preservatives, which may not be easily digestible for reptiles and can lead to digestive problems.
Often too high in protein + energy
Lack of Enrichment
Why are natural diet for herbivores hard to replicate in captivity
- Certain foods may not be available in supermarkets at certain times of year
- Pesticides on supermarket fruit and veg
What is pyramiding in tortoises
Pyramiding is a shell deformity that can occur in tortoises. It is a condition where the scutes (scales) of the tortoise’s shell grow upwards and outwards, causing the shell to have a pyramid-like appearance.
What causes pyramiding in tortoises
The main causes of pyramiding in tortoises are thought to be too much protein and low humidity (dry)
Imbalance of calcium and phosphorus (i.e., nutritional secondary hyperparathyroidism, also known as “metabolic bone disease”)
What causes beak and nail deformities in reptiles
Improper nutrition
Common dietary problems in insectivores
Metabolic bone disease
Hypovitaminosis A
Obesity
Common dietary problems in herbivores
Pyramiding
Beak and nail deformities
Metabolic bone disease
Common dietary problems in omnivores
Obesity
Metabolic bone disease
Dental disease
Why should you give supplements to reptiles
Some common nutrients that may be lacking in a captive reptile’s diet include calcium, vitamin D3. Calcium is important for strong bones and muscle function, while vitamin D3 helps the body absorb and use calcium.
What happens if reptiles have too much phosphorus and not enough calcium
Too much phosphorus and not enough calcium can lead to metabolic bone disease, which can cause softening and weakening of the bones
Examples of inappropriate diet for birds
Lack of variety
Inadequate dietary components
Imbalanced vitamin component
Contamination of food source
If you allow your bird to just selective feed
What can obesity lead to in birds
Diabetes mellitus (type 2 diabetes)
Hepatic lipidosis
Atherosclerosis
What is hepatic lipidosis
excess accumulation of fat in the liver
What is atherosclerosis
Atherosclerosis is a condition that affects the cardiovascular system of birds, and is characterized by the buildup of plaque inside the walls of the arteries.
What is the pathophysiology of atherosclerosis
- Buildup of plaque inside the walls of the arteries
- Restriction of blood flow
-Eventually heart failure and death
How common is atherosclerosis
is most commonly seen in birds that are kept in captivity, particularly those that are fed diets that are high in cholesterol and saturated fats.
What are raptors and how are they characterised
Birds of prey
group of birds that are characterized by their predatory behavior, sharp talons, and hooked beaks.
What do raptors eat
Whole vertebrate prey - flesh, bone, skin + casting materials
What is casting materials
Fur and feathers
What is thiamine
Vitamin B1
What can thiamine deficiency lead to
Thiamine deficiency can lead to a range of health problems, including neurological and cardiac disorders.
What is thiamine deficiency in raptors linked to
Thiamine deficiency in raptors has been linked to the consumption of prey that are deficient in thiamine or contain thiaminase, such as certain types of fish.
What is thiaminase
Thiaminase is an enzyme that breaks down thiamine
When would fish have active thiaminase in them
If they have been freezed/thawed as this will activate thiaminase
Why is the calcium phosphorous ratio important
If the Ca:P ratio is too low, it can lead to a range of health problems
What happens if If the Ca:P ratio is too low
A diet that is high in phosphorus and low in calcium can lead to metabolic bone disease
What is the ideal ratio of calcium to phosphorus in the diet
A ratio of 2:1 or higher (calcium to phosphorus) is considered appropriate.
What happens if If the Ca:P ratio is too high
A diet that is too high in calcium and low in phosphorus can also lead to health problems, such as kidney damage and impaired growth.
Why is vitamin D important
Vitamin D helps birds absorb calcium from their diet
Why is calcium important
It is important for the development and maintenance of strong bones, eggshells, and other tissues.
What is calcium homestasis
refers to the maintenance of a stable level of calcium in the body.
What are the 3 hormones involved with calcium homeostasis
Vitamin D3
Parathyroid Hormone (PTH)
Calcitonin
Where is PTH produced and what does it do
Produced in Parathyroid glands in response to low calcium
Acts to increase calcium levels in blood
How does PTH increase calcium levels in the blood
By:
- Stimulating the release of calcium from bones
- Increasing calcium reabsorption in the kidneys
- Increasing the production of vitamin D, which enhances calcium absorption from the gut.
Where is calcitonin produced and what does it do
Produced by thyroid gland
Acts to decrease calcium levels in the blood
How does calcitonin decrease calcium levels in the blood (in mammals)
By:
- Inhibiting the release of calcium from bones
- Stimulates osteoblasts to build bone, taking calcium from the blood
- Increasing calcium excretion in the kidneys.
Where is Vitamin D3 produced and what does it do
It is synthesized in the skin in response to sunlight
or obtained from the diet
Vitamin D helps to increase calcium absorption from the gut.
Does calcitonin play a role in calcium homeostasis in birds
It is unknown
How is Vitamin D metabolised
ProVitamin D is produced in the liver from cholesterol and is secreted on the skin
UVB exposure transforms ProVitamin D into Vitamin D3
Vitamin D3 can also be obtained directly from the diet
Vitamin D3 is transported to the liver where it’s converted into calcidiol
Calcidiol is transported to kidneys where it’s converted to the active form of Vitamin D - Calcitriol
What is Unactive Vitamin D3 called
Cholecalciferol