"An old female that achieved that kind of a length could be loaded with caviar and could be a very, very expensive, very lucrative fish to poach," she said. ($8,000/kg), according to the IUCN.ĭoukakis, who is also co-chair of the IUCN Sturgeon Specialist Group, thinks it's possible that there are 23-foot-plus belugas out there, but they would have a significant bounty on their heads. Adult females are prized for their fish eggs, which are sold as caviar and valued at more than $3,500/lbs. They aim to reintroduce the fish into Italian rivers, after it became locally extinct due to overfishing and the construction of dams in the country.īeluga sturgeon are listed as critically endangered on the IUCN Red List of Threatened Species, the category for species most at risk of extinction. "The species is under great pressure due to poaching, and probably the large animals have all been caught."Ĭongiu and his colleagues published a paper in January 2021 about the distribution and genetic diversity of beluga populations in the journal Diversity and Distributions. "I don't think there are beluga of that size any more," Congiu told Live Science in an email. However, today's beluga sturgeon may not be reaching lengths upward of 23 feet (7 m). Their vast size could also help them catch prey and survive predation interactions, according to Leonardo Congiu, an associate professor of ecology at the University of Padova in Italy. Larger sturgeon individuals probably had greater reproductive success, perhaps because the females can generate more eggs than smaller female fish. The beluga is the biggest of the 27 sturgeon and paddlefish species alive today.Īpart from their long lifespan, it's difficult to say exactly why belugas grow so big.
But I have seen platys endlessly pick on the females and I had to remove them and now I have an all male tank besides the two swordtails.Sturgeon have existed for more than 250 million years and even lived alongside the dinosaurs. Except I have 2 female swordtails in my tank with all males of other species and they seem to leave these two girls alone (thankfully) I guess because they are a different species themselves. It's just important to keep your tank to one "gender" because if find the males will continually harass the females and stress them out.
Hi, I didn't see any mention of mollies? Wouldn't they be okay in a community tank? I have tetras, platys, swordtails, guppies and 6 mollies and they seem to be doing fine. I've had peaceful mollies, and others that were terrors. :(Įric Dockett (author) from USA on November 14, 2017: The only problem is that my teacher needs only two or three fish for now, and the only critter that doesn't have to have any groups are the Ghost Shrimp. Perform regular water changes and keep your water parameters in good shape to avoid dissension in the ranks. This is very obvious in species like the aforementioned neon tetras. When fish get stressed, behavior issues are magnified. Manage water conditions: When conditions are poor, fish get stressed.Some large, otherwise peaceful fish get labeled as semi-aggressive simply because of their size and their appetites. If you intend to keep large fish along with neons, zebras, guppies, or other small species, you might find the little guys disappearing overnight. Choose tankmates wisely: Big fish eat little fish.Do not overstock your tank and you’ll have a much better chance of everyone getting along. Still, it is important to understand the needs and tendencies of the fish you’ll keep rather than simply rely on this formula. In this case, since the fish listed in this article are all fairly small, it’s not a bad way to ballpark your stocking scheme. It is far too general to be of use to most fish keepers.
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