Is my model right for survival rate?

Dear friends:
I am the beginner of asreml. I am estimating the variance of survival
rate which is from the challenge test data of turbot. Turbot is one of
marine fishies.
this is my model:
survival !bin !probit !wt=0 ~ mu !r animal fullsib 0.2
Is the model right for this analysis? which is right for survival rate
logit or probit link function?
The format of data file is just like this:
animal Sire Dam fullsib survival (binary,0 for death, 1 for survival)
20070028 2006041 20060159 3 0
20070029 2006041 20060159 3 0
20070030 2006041 20060159 3 0
20070031 2006041 20060159 3 0
20070032 2006041 20060159 3 0
20070033 2006041 20060159 3 0
20070034 2006041 20060159 3 0
20070035 2006041 20060159 3 1
20070036 2006041 20060159 3 1
20070037 2006041 20060159 3 1
20070038 2006041 20060159 3 1
20070039 2006041 20060159 3 1
20070040 2006046 20060165 4 0
20070041 2006046 20060165 4 0
20070042 2006046 20060165 4 0

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   Yours sincerely,
   luan sheng
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   Yellow Sea Fisheries Research Institute
   Chinese Academy of Fisheries Sciences
   Nanjing Road 106
   Qingdao 266071
   China
   luansheng_at_gmail.com
   luansheng_at_ysfri.ac.cn
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