Bubbashrimp
New member
Do you understand the reason why successive generations produce fewer and fewer offspring in captivity? :reading:
Question Dr.
- Thread starter Bubbashrimp
- Start date
hopefully the Q? isn't only applied to me, you have a number of highly educated, experienced fish breeders here.
Thats said, I do not totally know the answer to your queiry. However many schools of thought abound. In captivity it can be attributed to nutrition, inbreeding, and overcrowding
Why do you ask
Thats said, I do not totally know the answer to your queiry. However many schools of thought abound. In captivity it can be attributed to nutrition, inbreeding, and overcrowding
Why do you ask
Bubbashrimp
New member
I would appreciate everyones input!! Recently I have been reading alot of sientific articals descriping this phenomenon. I wonder if the scientists are just being laxidazical and more attentive to the question they are after or is it inevitable from inbreeding. So if one eliminated bad nutrition, inbreeding, and overcrowding this problem would be solved?
Bubbashrimp
New member
here is one
"As with most cephalopod species that have been cultured to date, two areas of further research
are needed... the second is solving the problem of low fertility
of captive cultured adults"
Minton J.W., Walsh L.S., Lee P.G. and J.W. Forsythe 2001. First multi-generation culture of the tropical cuttlefish Sepia pharaonis Ehrenberg, 1831. Aquaculture International. 9 : pp.379-392
Download: 7479.pdf
This is where I got the idea that there is a problem. Then I read the doctors paper about cardinal fish. Of course cardinal fish are not cephalopods but i think the problem might have a similar solution. Here is his paper, correct me if I am wrong doctor, i believe this list of numbers is read last to first.
"The average numbers of babies released was 20 [r=10, 12, 13, 15, 17, 17, 19, 20, 21, 21, 21, 22, 22, 24, 25, 28, 31, 37]. Interestingly, the brood size was larger during the first one or two breedings, and after the first year all my brood sizes dropped to below 20 babies/brood"
"As with most cephalopod species that have been cultured to date, two areas of further research
are needed... the second is solving the problem of low fertility
of captive cultured adults"
Minton J.W., Walsh L.S., Lee P.G. and J.W. Forsythe 2001. First multi-generation culture of the tropical cuttlefish Sepia pharaonis Ehrenberg, 1831. Aquaculture International. 9 : pp.379-392
Download: 7479.pdf
This is where I got the idea that there is a problem. Then I read the doctors paper about cardinal fish. Of course cardinal fish are not cephalopods but i think the problem might have a similar solution. Here is his paper, correct me if I am wrong doctor, i believe this list of numbers is read last to first.
"The average numbers of babies released was 20 [r=10, 12, 13, 15, 17, 17, 19, 20, 21, 21, 21, 22, 22, 24, 25, 28, 31, 37]. Interestingly, the brood size was larger during the first one or two breedings, and after the first year all my brood sizes dropped to below 20 babies/brood"
security of the brood, the more secure they feel or less hazards there facing daily reduces stress levels, less hazards == less deaths == less births needed to maintain or grow population
every few generations add more wild caught fish to the group,
thats what some do with cichlids
every few generations add more wild caught fish to the group,
thats what some do with cichlids
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