Limits...
Stress in farmed saltwater crocodiles (Crocodylus porosus): no difference between individually- and communally-housed animals.

Isberg SR, Shilton CM - Springerplus (2013)

Bottom Line: Blood samples were taken within three minutes of immobilisation and analysed using a commercial enzyme immunoassay kit.There was no relationship with animal size (P=0.16), between farms (P=0.86), pen types (P=0.69), communal pens between farms (P=0.28) or individual pens between farms (P=0.24).Based on corticosterone levels, it appears that individual pens do not cause significantly more stress on harvest-size animals than communal pens.

View Article: PubMed Central - PubMed

Affiliation: Centre for Crocodile Research, PO Box 329, Noonamah, Northern Territory 0837 Australia ; Faculty of Veterinary Science, University of Sydney, Sydney, NSW 2006 Australia.

ABSTRACT
Minimising stress in farmed crocodiles is not only important for improving animal welfare, but may also improve skin blemish healing and infection resistance, which influence the quality of the final skin product. Forty near-harvest size saltwater crocodiles (1.6-1.8 m TL) from two Australian farms were sampled to evaluate the effect of different pen types (communal pens n=20; individual pens n=20) on stress as indicated by plasma corticosterone. Blood samples were taken within three minutes of immobilisation and analysed using a commercial enzyme immunoassay kit. There was no relationship with animal size (P=0.16), between farms (P=0.86), pen types (P=0.69), communal pens between farms (P=0.28) or individual pens between farms (P=0.24). Based on corticosterone levels, it appears that individual pens do not cause significantly more stress on harvest-size animals than communal pens. Individual pens meet their design specifications by achieving comparable healing rates of belly skin blemishes as communal pens without compromising animal welfare and minimising the possibility of new blemishes.

No MeSH data available.


Related in: MedlinePlus

Corticosterone levels (ng/ml) of crocodiles in individual pens from Farm 1 against the number of days in the pen (P=0.83).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3755803&req=5

Fig2: Corticosterone levels (ng/ml) of crocodiles in individual pens from Farm 1 against the number of days in the pen (P=0.83).

Mentions: By sub-setting the data into communal and individual pen types, the overall average corticosterone value of communal pen animals was 5.86 ± 2.81 ng/ml (range 0–56.67 ng/ml) whilst the average corticosterone value of individual pen animals was 4.75 ± 1.27 ng/ml (range 0.66-16.16 ng/ml). An analysis comparing communal and individual pens between Farms 1 and 2 showed there were no significant differences between farms (P=0.28 and P=0.24, respectively). Records on duration in individual pens were available for Farm 1. There was no relationship between how long an animal had been in an individual pen and their corticosterone value (P=0.83, Figure 2).Figure 2


Stress in farmed saltwater crocodiles (Crocodylus porosus): no difference between individually- and communally-housed animals.

Isberg SR, Shilton CM - Springerplus (2013)

Corticosterone levels (ng/ml) of crocodiles in individual pens from Farm 1 against the number of days in the pen (P=0.83).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3755803&req=5

Fig2: Corticosterone levels (ng/ml) of crocodiles in individual pens from Farm 1 against the number of days in the pen (P=0.83).
Mentions: By sub-setting the data into communal and individual pen types, the overall average corticosterone value of communal pen animals was 5.86 ± 2.81 ng/ml (range 0–56.67 ng/ml) whilst the average corticosterone value of individual pen animals was 4.75 ± 1.27 ng/ml (range 0.66-16.16 ng/ml). An analysis comparing communal and individual pens between Farms 1 and 2 showed there were no significant differences between farms (P=0.28 and P=0.24, respectively). Records on duration in individual pens were available for Farm 1. There was no relationship between how long an animal had been in an individual pen and their corticosterone value (P=0.83, Figure 2).Figure 2

Bottom Line: Blood samples were taken within three minutes of immobilisation and analysed using a commercial enzyme immunoassay kit.There was no relationship with animal size (P=0.16), between farms (P=0.86), pen types (P=0.69), communal pens between farms (P=0.28) or individual pens between farms (P=0.24).Based on corticosterone levels, it appears that individual pens do not cause significantly more stress on harvest-size animals than communal pens.

View Article: PubMed Central - PubMed

Affiliation: Centre for Crocodile Research, PO Box 329, Noonamah, Northern Territory 0837 Australia ; Faculty of Veterinary Science, University of Sydney, Sydney, NSW 2006 Australia.

ABSTRACT
Minimising stress in farmed crocodiles is not only important for improving animal welfare, but may also improve skin blemish healing and infection resistance, which influence the quality of the final skin product. Forty near-harvest size saltwater crocodiles (1.6-1.8 m TL) from two Australian farms were sampled to evaluate the effect of different pen types (communal pens n=20; individual pens n=20) on stress as indicated by plasma corticosterone. Blood samples were taken within three minutes of immobilisation and analysed using a commercial enzyme immunoassay kit. There was no relationship with animal size (P=0.16), between farms (P=0.86), pen types (P=0.69), communal pens between farms (P=0.28) or individual pens between farms (P=0.24). Based on corticosterone levels, it appears that individual pens do not cause significantly more stress on harvest-size animals than communal pens. Individual pens meet their design specifications by achieving comparable healing rates of belly skin blemishes as communal pens without compromising animal welfare and minimising the possibility of new blemishes.

No MeSH data available.


Related in: MedlinePlus