A bill to give effect to the International Convention for the Conservation of Atlantic Tunas, signed at Rio de Janeiro May 14, 1966, by the United States of America and other countries.

Atlantic Tunas Convention Act - Provides that the United States shall be represented at the International Convention for the Conservation of Atlantic Tunas by not more than three commissioners.

Directs the commissioners to appoint an advisory committee.

Authorizes the Secretary of State to receive on behalf of the United States reports, requests, and other communications of the International Commission for the Conservation of Atlantic Tunas and to act directly thereon.

Authorizes the Secretary of Commerce to administer and enforce all of the provisions of the convention, this Act, and regulations issued pursuant thereto.

Makes it unlawful for any master or other person in charge of a fishing vessel subject to the jurisdiction of the United States to engage in fishing in violation of any regulation adopted pursuant to this Act, or for any person knowingly to ship, transport, purchase, sell, offer for sale, import, export, or have in custody, possession, or control any fish taken or retained in violation of such regulations.

Makes it unlawful for the master or any person in charge of any fishing vessel subject to the jurisdiction of the United States or any person on board such vessel to fail to make, keep, or furnish any catch returns, statistical records, or other reports as are required by regulations adopted pursuant to this Act to be made, kept, or furnished.

Makes it unlawful for the master or any person in charge of any fishing vessel subject to the jurisdiction of the United States to refuse to permit any person authorized to enforce the provisions of this Act any any regulations adopted pursuant thereto, to board such vessel and inspect its catch, equipment, books, documents, records, or other articles or question the persons on board in accordance with the provisions of this Act, or the convention, as the case may be, or to obstruct such officials in the execution of such duties.

Imposes fines for violations of this Act. Provides enforcement procedures to carry out the provisions of this Act.

Authorizes to be appropriated such sums as may be necessary to carry out the provisions of this Act.

Endangered Species Conservation Act - States that the purpose of this Act is to provide a program for the conservation, protection, restoration, or propagation of species and subspecies of fish and wildlife, including migratory birds, that are threatened with extinction, or are likely within the foreseeable future to become threatened with extinction.

Sets forth the procedure by which the Secretaries of Interior and Commerce hereafter "Secretary" shall determine if a species or subspecies of fish or wildlife shall be regarded as an endangered species. Lists the following factors to be considered in determining if a species or subspecies is threatened with extinction or will likely become threatened with extinction: (1) the present or threatened destruction, modification, or curtailment of its habitat or range; (2) overutilization for commercial, sporting, scientific, or educational purposes; (3) disease or predation; (4) the inadequacy of existing regulatory mechanisms; or (5) other natural or manmade factors affecting its continued existence.

Provides that the Secretary shall publish in the Federal Register, a list by scientific and common name or names of species and subspecies determined to be endangered. Provides that the Secretary may, from time to time, by regulation revise such list.

States that until such republication on endangered species already listed shall be considered an endangered species presently threatened with extinction pursuant to this Act.

Provides that the Secretary shall utilize the land acquisition and other authorities of the Migratory Bird Conservation Act, as amended, the Fish and Wildlife Act of 1956, as amended, and the Fish and Wildlife Coordination Act, as appropriate, to carry out a program in the United States of conserving, protecting, restoring, or propagating those species and subspecies of fish and wildlife that he lists as endangered species pursuant to this Act.

States that it is unlawful for any person to: (1) import into or export from the United States, receive or cause to be so imported, received, or exported; or (2) take or cause to be taken within the United States, the territorial sea of the United States, Federal lands, or upon the high seas; or (3) ship, carry, or receive by any means in interstate commerce; or (4) sell or offer for sale any species or subspecies which is listed as an endangered species.

Provides that any State law or regulation is void to the extent it would effectively permit or prohibit imports, exports or transactions in interstate or foreign commerce in a manner inconsistent with the provisions of this Act.

Allows exceptions from the prohibitions contained in this Act to permit the taking of an endangered species for scientific purposes and for the propagation of such fish and wildlife in captivity for preservation purposes.

Sets forth civil and criminal penalties for violations of the provisions of this Act. Authorizes the Secretary to promulgate such regulations as may be appropriate to carry out the purposes of this Act.

Provides that the Secretary may require any person importing or exporting fish and wildlife to file a declaration stating such information as he deems necessary to facilitate enforcement of this Act.

Authorizes the Secretary, the Secretary of the Treasury and the Secretary of the Department in which the Coast Guard is operating to promulgate such regulations as may be appropriate to carry out the purposes of this Act.

States that the Secretary, through the Secretary of State, shall encourage foreign countries to provide for the protection, conservation and propagation of fish and wildlife, and shall encourage bilateral and multilateral agreements with such countries for these purposes.

Provides that, in carrying out the program authorized by this Act, the Secretary shall cooperate to the maximum extent practicable with the several States. States that such cooperation shall include consultation before the acquisition of any land for the purpose of conserving, protecting, restoring, or propagating any endangered species. Authorizes the Secretary to enter into agreements with the States for the administration and management of any area established for the conservation, protection, restoration, and propagation of endangered species.

Authorizes appropriations of such sums as may be necessary to carry out the purposes of this Act.