Jump to content

Menu

Have you seen the article about the pregnant stingray?


stephanier.1765
 Share

Recommended Posts

Every reaction  I’ve seen from marine biologists has been a massive eye roll along with the information that stingray parthenogenesis is a known thing and stingrays and sharks are not genetically close enough to cross-breed.

  • Like 5
Link to comment
Share on other sites

17 minutes ago, Danae said:

Every reaction  I’ve seen from marine biologists has been a massive eye roll along with the information that stingray parthenogenesis is a known thing and stingrays and sharks are not genetically close enough to cross-breed.

Well that’s boring.  We want sharks with sting ray wings and barbed tails to add to our nightmares, not settled science.  

  • Like 1
  • Thanks 2
  • Haha 12
Link to comment
Share on other sites

1 hour ago, Danae said:

Every reaction  I’ve seen from marine biologists has been a massive eye roll along with the information that stingray parthenogenesis is a known thing and stingrays and sharks are not genetically close enough to cross-breed.

Yes rolling eyes here. I mean it’s a neat story but far from the first time an aquatic animal has done this - changed sex later in life or self-reproduced.
 

I imagine it’s been a great marketing point for the aquarium, though!

  • Like 2
Link to comment
Share on other sites

You know, this is kind of a bummer. I mean this kind of thing is so common with many species, Komodo Dragons do it too. But still, we have so much nasty in the world, it sure would have been fun to have some sort of monster baby, sharkey sting ray that is has super powers. 😁

  • Like 3
  • Haha 2
Link to comment
Share on other sites

34 minutes ago, Faith-manor said:

You know, this is kind of a bummer. I mean this kind of thing is so common with many species, Komodo Dragons do it too. But still, we have so much nasty in the world, it sure would have been fun to have some sort of monster baby, sharkey sting ray that is has super powers. 😁

Neat, fun, exciting, sure! But I can imagine how quickly some would turn it into some kind of doomsday omen. 

Link to comment
Share on other sites

54 minutes ago, Faith-manor said:

You know, this is kind of a bummer. I mean this kind of thing is so common with many species, Komodo Dragons do it too. But still, we have so much nasty in the world, it sure would have been fun to have some sort of monster baby, sharkey sting ray that is has super powers. 😁

But there already is a sharkey sting ray! https://en.wikipedia.org/wiki/Rhina_ancylostoma

  • Like 4
Link to comment
Share on other sites

The discussions about this online have been really interesting. For example, the argument that interbreeding between a shark and a ray is genetically impossible because they are far too distantly related, having diverged 200 million years ago, was countered by a biologist mentioning the accidental interbreeding in 2020 of Russian sturgeon and American paddlefish, which diverged 140 million years ago and were also assumed to be far too distantly related to interbreed:

"The accident came about as scientists at the Research Institute for Fisheries and Aquaculture in Hungary were trying to ascertain if introducing asexual reproduction into paddlefish and sturgeon could protect their population numbers, which are plummeting in the face of overfishing, pollution, and habitat loss. Instead of ending up with lots of paddlefish and sturgeon clones, they found themselves with a new animal altogether, and since – despite their evolutionary distance – these two species share some physical traits, the resulting offspring appear to be surviving. ... Like many other hybrids, the offspring were sterile, but the unexpected result of housing these two very, very distantly related species goes to show that sometimes life really does, uh, find a way."

The possibility of bamboo sharks and stingrays successfully interbreeding is far less likely since bamboo sharks lay eggs and stingrays give live birth, but I thought the info about sturgeon and paddlefish was really interesting!

  • Like 3
  • Thanks 1
Link to comment
Share on other sites

I hope that it's parthenogenesis, because the idea of cross-breeding makes me imagine a male shark sexually harassing the female ray until she was exhausted and he was successful.  I know that's applying human ethics to animals, but I admittedly get uncomfortable with that behavior within a species.  It feels extra squicky across distant species.

  • Like 1
Link to comment
Share on other sites

5 hours ago, Cecropia said:

I hope that it's parthenogenesis, because the idea of cross-breeding makes me imagine a male shark sexually harassing the female ray until she was exhausted and he was successful.  I know that's applying human ethics to animals, but I admittedly get uncomfortable with that behavior within a species.  It feels extra squicky across distant species.

Don't ever keep ducks then. Drakes are sex maniacs 

Link to comment
Share on other sites

Two other possibilities which occur in other ectotherms-

The first is that if she was ever with a male, a lot of species can retain sperm for YEARS. There have been some "parthenogenesis" cases that, after genetic testing turned out to be a chance encounter in a shipping container before the animal got to that zoo or aquarium. 

 

And, a really cool option-some all female  species are kleptogenetic-they mate with members of other species, and use their genetic material selectively. As far as I know, it hasn't been documented in any species that HAS both males and females.  

 

And there have been a LOT of cross-breeds in snakes that occured in captivity that would never occur in the wild-which has, in some cases, caused reclassification of species because "well, guess they're more closely related than we thought!" Like basically any king snake can interbreed and have fertile offspring with any rat snake, despite being different genus. 

 

One thing I've learned from having a kid with a special interest in herps---if we think it can't happen, it's because we haven't seen it happen yet...not that it's impossible.  And there are good reasons why the herpetology and Icthyology folks do meetings together and a lot of jobs are for both. 

 

Regardless, it's getting the aquarium a lot of press, and probably a lot of visitors and donations. And that's a great thing for conservation. 

 

 

 

 

  • Like 3
Link to comment
Share on other sites

On 2/13/2024 at 9:12 AM, Heartstrings said:

Well that’s boring.  We want sharks with sting ray wings and barbed tails to add to our nightmares, not settled science.  

 

20 hours ago, Amira said:

But there already is a sharkey sting ray! https://en.wikipedia.org/wiki/Rhina_ancylostoma

And angel sharks. 
There really is a shark for everyone.

Oops. Corrected with pic. 
 

IMG_5634.jpeg

Edited by Murphy101
  • Like 5
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...