Hp 3 Flashcards
(119 cards)
5 parameters of the water quality in the fish
Temperature
Dissolved oxygen
PH
Ammonia
Nitrite and nitrate
major groups of fish cultured in the world.
main types of aquaculture systems used to maintain captive fish
main water quality parameters used to evaluate water quality for fish
some of the major stressors of captive and wild fishes
Primary waste product of a fish
Ammonia from the gills and it is <0.02ppm
As ph and temperature goes up then the ammonia becomes more toxic
New tank syndrome
First 6 weeks of the new aquatic system
- It takes 6 weeks to go from one end to the other end (ammonia to nitrate) to overcome the issue
• so ammonia and nitrite are the primary problem
Only way to get rid of the nitrate is by doing regular water changes
Gills do 3 things
Respiration
Excrete
Oslo regulation -
VHS
Viral hemorrhagic septicemia
Along the pacific coast
Most common bacteria that affects the fish population
The most common pathogen?
Gram negative
Aeromonas hydrophilia- in the freshwater fish it causes skin and systemic infection [more in summer/spring]
Know mycobacterium for fish
Zoonotic and looks different in different species
- granduloma in organs or tissues
Ecdysis
Dysecdysis
Periodic renewal of skin by shedding
Major diseases and problems of the reptiles
Viral: paramyxovirus [diagnose respiratory dz post mortem and causes 2ndary bacteria] and inclusion body disease (IBD) [progressive flaccid paralysis]
Bacteria: salmonella [zoonosis], ulcerative stomatitis, pneumonia, mycobacterium [zoonosis]
Housing requirements of the reptiles
Species specific: aquarium, terrarium, viviarium
Need water and dry land
Temperature gradient (78-95) and UV light
—UVB 290 320 helps with VitD metabolism and the calcium synthesis
House individually
Do you have to feed reptiles live prey?
No you can actually avoid feeding them live prey
Zppnotic diseases of the reptiles
Aeromonas and Pseudomonas :ulcerative stomatitis and pneumonia or secondary bacterial infection to the paramyxovirus
Salmonella : ban turtles <4in —> subclinical
Mycobacterium : nodular granduloma
Practice hygiene!
Metabolic bone disease in reptiles is because
Of poor nutrition it is low calcium and high phosphorous (due to diet)
Or it can be because of inadequate light no calcium synthesis
What are reptiles?
Snakes and lizards
turtles and tortoises
Alligators and crocodiles
Amphibian diseases
Chromomycosis vs Chytridiomycosis
Chromomycosis -Fungal zoonotic disease that causes disseminated and pigmented granduloma (black spots)
Chytridiomycosis- Worldwide fungus, NOT zoonotic— cause sudden death and ventral erythema with keratin deformity— no hyphae
—death due to loss of osmoregulation
Both in soil and both euthanasia
Reg leg syndrome
Aeromonas hydrophila
— due to stress or trauma or poor water
Tx: change water and nutrition
Zoonotic
Skin ulceration ddx in amphibians
Aeromonas and mycobacteriosis — need PCR or histopathology to differentiate
Iridovirus : abnormal swimming
Skin and gill irritation leads to….
Epithelial hyperplasia in fish and amphibians
—reduces ability to breathe through skin and osmoregulate
Epitheliotrophic virus
Canine distemper
Hemorrhagic disease in Whitetail deer in southeastern US
Oral cyanosis
Hemorrhage at the base of the pulmonary artery