river chub造句

• River chub is one of the most common fishes in its range.
• None of the imperiled is a mound builder like the river chub.
• River chubs were historically present in the creek, but have disappeared.
• The river chub is generally considered widespread and abundant with no apparent major threats.
• The river chub presence in a stream is a good indicator of water quality.
• The redtail chub has not been found in the same waters as the river chub.
• The river chub lives up to 5 years, reaching sexual maturity in its second year.
• It is suspected that the river chub feeds on the gelatinous masses as it does drifting insects.
• The glochidia encyst on the gills of river chubs where they metamorphose into juveniles and then drop off.
• In early spring the adult male river chub undergoes pronounced changes in his appearance in preparation for breeding.
• Also, dams have inundated areas that were once habitat for the river chub eliminating bits of its range.
• However, the redtail chub prefers smaller streams than the river chub, so interspecific competition does not offer the entire explanation.
• The river chub is host to mussels including the endangered fine-rayed pigtoe, Tennessee clubshell and probably many other amblemine glochidia.
• The river chub does suffer where pollution, turbidity and siltation, acid mine drainage and acid precipitation / deposition impact its habitat.
• The river chub is prey for larger fish and is used as bait by fishermen seeking large game fish such as bass and catfish.
• Limestone treatments and wetlands were built to mitigate the acid mine drainage and the river chub was one of the first species to return.
• Virtual restriction of redtail chub to Highland Rim habitats which are only marginally occupied by the river chub suggests a powerful physiographic component to these distributions.
• In addition, the creek contains seven darter species, two minnow species ( bluntnose minnow and cutlips minnow ), and two chub species ( creek chub and river chub ).
• Preference for river chub nests by nest associates may be due to a lack of spawning habitat for some species, but some require the association with pebble nest builders to reproduce.
• The eggs hatch in 5 6 days and the larvae grows to become a 19mm long juvenile in about 57 days . At two years the river chub is 95-110mm and sexually mature.