Sentences with phrase «declining numbers of fish»

The research documented a connection between various human activities and declining numbers of fish, including Moi, a species (Polydactylus sexfilis) of threadfin.

Not exact matches

Environmental water is being used to help prevent the decline of native fish in the Basin by increasing their health, numbers and diversity.

As a result, the number of exotic plants and animals as well as freshwater fish declined in most reserves.

Couple that with their propensity to eat a significant quantity of juvenile fish, it's only a matter of time until those other fish species start to see a decline in their numbers on the reef.

Scientists found that culling older, larger prey fish can lead to more small fish for predators to dine on, even though the overall number of prey decline

Ainley says that the decline of this large, slow - growing, bottom - dwelling fish has knocked the Antarctic ecosystem out of whack and resulted in killer whales dropping in numbers, whereas silverfish have increased in abundance to compete with penguins and whales for crystal krill.

All bird species showed the same response, the team reports in the 23 December issue of Science: the number of fledglings per breeding pair started to decline when the abundance of forage fish dropped below one - third of the maximum observed amount.

Although seabirds are adapted for the vicissitudes of life — forage fish numbers have large natural fluctuations — seabirds populations may decline when fishing depresses levels for many years in a row.

Reintroduction to the Southwest began in 1998, but numbers of wolves oscillated and declined precipitously from 2004 to 2009, when the Arizona Game and Fish Department controlled management and directed the trapping and shooting of numerous wolves, including genetically valuable animals.

Charlie Potter, host of Chicago radio station WGN's Great Outdoors program («dedicated to bringing to WGN listeners outdoor information in an honest and entertaining format») and president of the Max McGraw Wildlife Foundation (whose mission involves «actively creating solutions through programs of management, education, research and communications that strongly enhance the conservation of fish, game, wildlife and their habitats»), is blaming declining Northern bobwhite numbers on feral cats.

We recently experienced a mass fish die off with thousands of dead fish washing up on our beaches because of the hot water, and the giant Australian cuttlefish, which breeds in the gulf waters near Adelaide, has undergone a catastrophic 90 % decline in numbers over the past few years because the waters are too warm for them to breed.

Persistent drought conditions have also adversely impacted water - dependent habitats and species within and downstream of forest uplands, as evidenced by heightened mortality of a riparian tree species in central Arizona [5] and declines in number of species and densities of native fish in the Gila River in southwestern New Mexico [6], [7].

The lower Chesapeake Bay is especially at risk due to high rates of sinking land (known as subsidence).96 Climate change and sea level rise are also likely to cause a number of ecological impacts, including declining water quality and clarity, increases in harmful algae and low oxygen (hypoxia) events, decreases in a number of species including eelgrass and seagrass beds, and changing interactions among trophic levels (positions in the food chain) leading to an increase in subtropical fish and shellfish species in the bay.66

Like neighbouring Cornwall to the west, historically Devon has been disadvantaged economically compared to other parts of Southern England, owing to the decline of a number of core industries, notably fishing, mining and farming.