In this chapter, the following terms have the meanings indicated. Terms Defined. “Endangered species” means any species whose continued existence as a viable component of the State's fish resources is determined to be in jeopardy, including any species of fish determined to be an “endangered species” pursuant to the Endangered Species Act of 1973, 16 U.S.C. §§1531—1543. “Species in need of conservation” means any species which: May become threatened in the foreseeable future; Has a limited or declining population; and Has been determined by the Secretary to be in need of conservation measures for its continued ability to sustain itself successfully. “Threatened species” means any species of fish which appears likely, within the foreseeable future, to become endangered, including any species of fish determined to be a “threatened species” pursuant to the Endangered Species Act of 1973, 16 U.S.C. §§1531—1543.