Can Brother And Sister Fish Mate

[hay13]

hi i know with other animals you cant breed brother and sisters is it the same with fish as im looking to get a male and female off of some one but they are from the same fry.does this matter if they mate or should i get a female from someone else

 

[shelaghfishface]

get a female from someone else!

 

[Malt_Vinegar]

hi i know with other animals you cant breed brother and sisters is it the same with fish as im looking to get a male and female off of some one but they are from the same fry.does this matter if they mate or should i get a female from someone else

A male and female of the same species will be able to breed in most (if not all) cases, regardless of wether they are related.

Taking any emotion or morals out of the aquation, Humans can do this too, but it is a bad idea on a genetic scale. The basic facts being that you are more likely to have two recessive alleles joining together, and bringing out recessive traits when the pairing is closely related.

So, it is best to have unrelated pairs, but not biologically required. However, fry from a non-related couple should be healthier, and more viable!

 

[angelfishguy]

related pairs with fish is normal and practised to get differant strains of fish

 

[shelaghfishface]

hence all the weak strains?

 

[Malt_Vinegar]

Genetically speaking again... Breeding from related pairs reduces the gene pool available for the fry. So, one off pairings might well be fine, but consistant breeding of related pairs from related pairs can mean exagerated and unusual characteristics appear more often than with un-related pairs(this is often desired in some fish) like the tails in male fancy guppies.

 

[stoneagedinosaur]

Get ready to break out the banjo! A smaller gene pool is never a good thing - it tends to lead to mutations. However, one in a million mutations is beneficial to the organisms

 

[Malt_Vinegar]

Get ready to break out the banjo! A smaller gene pool is never a good thing - it tends to lead to mutations. However, one in a million mutations is beneficial to the organisms

Mutations can be beneficial, but this is usually a rarity. Long term inbreeding will reduce the overall health and viability of a whole population.

Wikipedia explains this all far better than I can!
http/en.wikipedia.org/wiki/Inbreeding

 

[loraxchick]

Get ready to break out the banjo! A smaller gene pool is never a good thing - it tends to lead to mutations. However, one in a million mutations is beneficial to the organisms

the small gene pool doesnt lead to mutation. mutation is random and just happens by chance. with a small gene pool tho, the mutation tends to be amplified and become "normal" characteristic throughout the population. but not all mutations are bad.

Mutations can be beneficial, but this is usually a rarity. Long term inbreeding will reduce the overall health and viability of a whole population.

Wikipedia explains this all far better than I can!
http/en.wikipedia.org/wiki/Inbreeding

smaller gene pool is generally not good as someone mentioned if there are recessive traits present the likelihood of them becoming expressed is increased. not always a good thing, not always a bad thing. it depends on the actual trait in question. recessive gene ffor say, disease resistance would be a good thing, while recessive genes for disease susceptibility obviously would be bad.
it is not in any sort of "violation" to breed siblings, or father daughter, etc. actually line breeding is common and widely used in farming and MANY other "activities". bearing in mind it is NOT wise to interbreed if you know there is a chance of bad genes in the pool. and that is where "weak strains" etc come from. the breeders being careless and not "keeping track" of negative (or bad) gene mutations without regard to what they are trying to achieve (like say, fancy tailed guppies-the breeders simply are interested in the tails, and overlook other characteristics when making their selection for breeding...not saying ALL breeders, but thats where the weak strains come into play).
enetics can be a very tricky game. especially since you honestly dont know what mutations lie in the genes until they "show up" and can stay "hidden" for many generations. only takes the right combination of parents (and their genes) to combine so that particular trait becomes visible. breeding related animals only increases the likelihood that recessive genes in that bloodline will be expressed. but that can happen with any two fish. its like a roll of the dice.
dont know if i articulated myself very well. i do teach this stuff to biology students. its all very interesting, but i dont have much real world experience with the exception of plants. but same concept.
so to answer the question, its fine to breed siblings/relatives. just dont do it over and over and over or else the chance of something "bad" showing up is increased (along with potential "good things" too-its a gamble). but thats all genetics is-rolling the dice with the genes that are present.
cheers

 

[nurglespuss]

Well... most of the oranmental fish trade are highly related, so provided your breeding from healthy stock, and not continuing to interbreed related offspring, or off spring with parents (although offspring with parent can 'sometimes' be more beneficial due to less genetic similarity)then you should be fine, just try and get hold of more 'distant' relations for future breeding to refresh the genetic material.

If you want to read more about it in other animal, check out cheetahs, walruss etc.

 

[Ryefish]

Get a male from this person and then get a female from somewhere else. Saves a lot of trouble in the future.

Any males and females of any species of animal (that includes us) CAN and WILL breed if they are forced to - i.e, no other mate is available

 

[nurglespuss]

Well not forced to. it happens quite frequently in nature, its all about immediate availability, migrations and bottle necking. Its not the 'best' strategy for devloping a 'fit' future populace, but as a short term strategy for developing numerically, and geogrpahically, its quite viable.

 

[stoneagedinosaur]

Good topic Have a look at this link. Not too sciencey but gets the basics across quite nicely inbreeding in fish

 

[didz04]

I had a male & female guppy breed and once the baby grew big the parents were after all their kids so I had to separate them, and then the parents got back with each other and had another batch.

I know this is out of topic in some ways but have you heard of the liger, its a lion and tiger bred together and called it a liger. They are HUGE and way more friendly than the original lion and tigers. Here is a pic of one put in google liger.

 

[hay13]

hi guys thank for all your helpand cheers for the web pages to very good