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A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.
Laboratory rats or lab rats are strains of the rat subspecies Rattus norvegicus domestica (Domestic Norwegian rat) which are bred and kept for scientific research. While less commonly used for research than laboratory mice , rats have served as an important animal model for research in psychology and biomedical science .
Rats are a common food item for snakes, both in the wild, and as pets. Adult rat snakes and ball pythons , for example, are fed a diet of mostly rats in captivity. Rats are readily available (live or frozen) to individual snake owners, as well as to pet shops and reptile zoos, from many suppliers.
Domestic rats differ from wild rats in many ways. They are calmer and less likely to bite; they can tolerate greater crowding; they breed earlier and produce more offspring; and their brains, livers, kidneys, adrenal glands, and hearts are smaller (Barnett 2002). Brown rats are often used as model organisms for scientific research.
Food chain in a Swedish lake. Osprey feed on northern pike, which in turn feed on perch which eat bleak which eat crustaceans.. A food chain is a linear network of links in a food web, often starting with an autotroph (such as grass or algae), also called a producer, and typically ending at an apex predator (such as grizzly bears or killer whales), detritivore (such as earthworms and woodlice ...
The Polynesian rat, Pacific rat or little rat (Rattus exulans), or kiore, is the third most widespread species of rat in the world behind the brown rat and black rat.Contrary to its vernacular name, the Polynesian rat originated in Southeast Asia, and like its relatives has become widespread, migrating to most of Polynesia, including New Zealand, Easter Island, and Hawaii.
The Heritage Foundation's Project 2025, seen as a guiding document for a second Donald Trump presidency, includes many ideas first tried in Florida.
As an alternative to bushmeat, captive breeding of species traditionally harvested from the wild is sometimes feasible. Captive breeding efforts must be closely monitored, as there is risk they can be used to launder and legitimize individuals captured from the wild, similar to the laundering of wild green tree pythons in Indonesia for the pet ...