Professor Wood, Dr. Sokolow and their colleagues also found that restocking captive-bred African river prawn larvae to their native home in the Senegal river, combined with Praziquantel treatment, could potentially eliminate the Schistosoma parasite locally within five years (ref).
Seven of these populations (Machias, Narraguagus, Sheepscot, East Machias, Dennys, Pleasant and Penobscot) are part of a supplemental breeding program at the United States Fish and Wildlife Service's Craig Brook National Fish Hatchery (CBNFH) in East Orland, ME, where river-specific parents produce larvae (fry) that are stocked back into the rivers.
The research in the Welsh rivers found microplastics in larvae both upstream and downstream from wastewater treatment plants, indicating that plastic pollution enters rivers directly, not just via sewage.
Other recent research found that half of the mayfly and caddisfly larvae in rivers in Wales contained microplastics.
In minnow larvae, exposure to river water upregulated androgen receptor gene expression whereas exposure to the sediment downregulated estrogen receptor α expression.
When Robert McNamara expanded the bank's mission in the late 1960s, doing things such as sending helicopters to spray the African black fly larvae that spread river blindness, many staffers were "deeply distressed to see the institution 'running off in all directions'", according to a history published in 1973.
With river blindness, black flies spread larvae that when grown destroy eye tissue; mosquitoes do the same for the worms that block the lymphatic system in elephantiasis; hookworm, roundworm and whipworm are soil-born.But as such diseases often plague the same places, it is possible to dispense several drugs together, saving money.
People fishing out mosquito larvae from a river.
Mayflies are susceptible to water pollution because their larva live on river beds for two to three years, growing and molting about 20 times before surfacing as short-lived adults.
Additionally, recent research has shown abundant epibenthic/epiphytic (bottom dwelling/edge clinging) prey in non-flooded lowland rivers, traits in Murray cod larvae that should allow survival in a variety of challenging conditions, and a significant proportion of Murray cod larvae feeding successfully in non-flooded rivers.
Short films played as a backdrop to the catwalk show: there were clips of flames, of feathers floating in a river and, I think, of tick larvae.
