Scientists from the Vitus Bering Kamchatka State University, together with colleagues from the AN Severtsov Institute of Ecology and Evolution, recorded the first case of reproductive isolation of char in Gornoe Lake in Kamchatka. about this TASS reported the university’s press service.
“The main feature of the discovered population is that it is completely isolated from the migratory Dolly Varden living in the Kirganik River. Dolly Varden in the Kamchatka River basin regularly migrate between the ocean and spawning tributaries, while the population of Lake Gornoye leads a strictly sedentary lifestyle,” said Vitus Daria Panicheva, head of the laboratory at Kamchatka State University named after Bering.
KamSU noted that such a phenomenon has scientific value. Reproductive isolation of fish can help estimate the rate at which mutations accumulate in the genome of a small population, according to the university. In addition, this event will allow the “molecular clock” to be adjusted to determine the timing of departure of different salmon on the peninsula.
Scientists previously from the Max Planck Institute for Animal Behavior loadedIt turned out that low-grade male cichlid fish experience social stress, which increases oxidation processes in their brains. According to experts, males of this species have a strict and distinct social hierarchy. Dominant males, having higher levels of androgen hormones, are larger, more aggressive and brighter than the “subordinates”.
Previously, scientists for the first time filmed killer whales prey on sharks.
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Source: Gazeta
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