Gravel chub silt and debris. They are more often found in areas with limited macrophytes and larger root aquatic plants, algae and moss. Because of their need of a specialized clean habitats, the gravel chub is especially vulnerable to various forms of pollution, especially from agriculture practices that create erosion and excessive silt. In past sampling surveys the gravel chub had been found as far north in the Upper Iowa River as Le Roy, Minnesota, but because of excessive amounts of sewage, pesticides and sedimentation of rocks and sand, this is no longer the case. The presence of gravel chubs in a
Granular pugolovka cycle is about a year, which is normally how long it takes for their spawning season to start after their birth. The granular pugolovka all die shortly after spawning with the females dying before the males due to the more costly act of laying eggs as opposed to the males role of releasing sperm. "Benthophilus granulosus" is a bottom dweller and has a fairly limited diet or zoobenthos. They eat mysids, amphipods, bivalves, insects, and other foods. Granular pugolovka The granular pugolovka ("Benthophilus granulosus") is a species of gobiid fish widespread in the Caspian Sea. It is a small fish,