The phrase "are maintained in captivity" is correct and usable in written English.
It can be used when discussing animals or organisms that are kept in controlled environments rather than in their natural habitats.
Example: "Many exotic species are maintained in captivity to ensure their survival and to facilitate research."
Alternatives: "are kept in captivity" or "are housed in captivity".
As we humans take over more and more of the planet and ransack the place, ever more species are inviable in the wild and populations can only be maintained in captivity.
Lobsters were maintained in captivity in the flowing sea water system of the Darling Marine Center, University of Maine, which is located in Walpole, Maine.
These findings are of significance to other species' reintroductions, in highlighting the need to consider life-history strategies when choosing housing systems for animals being maintained in captivity prior to release to the wild.
Bats have been transported varying distances, sometimes worldwide, to be maintained in captivity as research animals, as live specimens in zoos or other exhibits, and as pets.
Second, fish can be maintained in captivity throughout all life stages for aquaculture purposes, where they are selected for desired phenotypic traits such as increased growth, flesh quality, parasite resistance, and delayed maturity (Frankham 2008; Araki and Schmid 2010).
These infants were compared to infants in the middle of the normative range 50th-75thh centile) and accordingly we excluded infants who may have had macrosomia as a result of the mother's being over-nourished by being maintained in captivity.
It is also possible to minimize domestication selection by selecting a source population that has been maintained in captivity for a minimal number of generations and incorporated wild individuals into the breeding protocol (Frankham 2008; Williams and Hoffman 2009).
X. laevis was selected as the most suitable amphibian for investigating the mechanism of the mating reflex because of the relative ease with which the animal can be maintained in captivity (33 ).
General conditions of captivity were applied and animals were maintained in social groups before and after experimenting.
