Ancistrus sp. “Rio Itenez” (Kiefneri II) L519

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Ancistrus sp. "Rio Itenez" (Kiefneri II) known as L-519 

This highly appealing ancistrus was discovered a few years ago (in 2019) by Gerhard Kiefner in the Rio Itenez River in Bolivia (known as Guapore in Brazil). Ancistrus sp. Rio Itenez (L-519) quickly became one of the most sought-after fish species among Loricariidae enthusiasts.

Content:

1. What does Ancistrus sp. "Rio Itenez" (L-519) look like?

2. What conditions does Ancistrus sp. "Rio Itenez" (L-519) require?

3. Reproduction of Rio Itenez (L-519)

4. What to feed young ancistrus?

What does Ancistrus sp. "Rio Itenez" (L-519) look like? It is one of the smaller ancistrus species. Three-year-old males reach only 9 cm in length, with females being slightly smaller. Besides its compact size, the species is distinguished by its fascinating coloration, presenting a marble-like pattern on the body.

Males have visible soft tentacles (similar to other ancistrus), while females tend to have smaller ones, making it challenging to determine the sex of young fish up to about 5-6 cm in length.

What conditions does Ancistrus sp. "Rio Itenez" (L-519) require? Unlike many other ancistrus varieties, L-519 thrives in more acidic and very soft water. Reports suggest that the water in the middle reaches of the Itenez River has a pH of 6.9 and a conductivity of 24 mS. In contrast, in the lower section, the pH is 6.4, and the conductivity is 22 mS. I had the opportunity to talk to Gerhard Kiefner, who recorded pH 6.0 and conductivity 20 mS at the capture site of these fish. Hence, it is crucial to provide aquarium water with a soft pH below 7, especially for successful breeding. In harder water, eggs often turn white as fertilization does not occur.

Regarding water temperature, it is advisable to maintain it between 26 and 28°C.

Reproduction of Rio Itenez (L-519) These fish mature quickly, ready to spawn at the age of 10-12 months. Due to their small size, the number of eggs is relatively small, typically around 30-40. The fish spawn in ceramic or wooden caves.

At the recommended temperature, the young hatch after about 5-6 days. It takes them an additional 4-5 days to absorb the yolk sac fully. After this period, they start swimming independently in search of food.

Provided with the right conditions, the reproduction of Rio Itenez (L-519) is quite straightforward. Consequently, since the species first entered the market, its price has significantly decreased. Now, every aquarium enthusiast can afford them, not just those passionate about Loricariidae with substantial budgets.

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