Section 17.46 - Species-specific rules-crustaceans(a) Madison Cave isopod (Antrolana lira). (1) All provisions of § 17.31 (a) and (b) apply to this species except that it may be taken for scientific purposes without Federal permits issued pursuant to these regulations: Provided, that all other Federal, State, or local laws, regulations, ordinances or other restrictions or limitations have been complied with.(b) Panama City crayfish (Procambarus econfinae)- (1)Prohibitions. The following prohibitions that apply to endangered wildlife also apply to the Panama City crayfish. Except as provided under paragraph (b)(2) of this section and §§ 17.4 and 17.5 , it is unlawful for any person subject to the jurisdiction of the United States to commit, to attempt to commit, to solicit another to commit, or cause to be committed, any of the following acts in regard to this species: (i) Import or export, as set forth at § 17.21(b) for endangered wildlife.(ii) Take, as set forth at § 17.21(c)(1) for endangered wildlife.(iii) Possession and other acts with unlawfully taken specimens, as set forth at § 17.21(d)(1) for endangered wildlife.(iv) Interstate or foreign commerce in the course of a commercial activity, as set forth at § 17.21(e) for endangered wildlife.(v) Sale or offer for sale, as set forth at § 17.21(f) for endangered wildlife.(2)Exceptions from prohibitions. In regard to this species, you may:(i) Conduct activities as authorized by a permit under § 17.32 .(ii) Take, as set forth at § 17.21(c)(2) through (4) for endangered wildlife.(iii) Take as set forth at § 17.31(b) .(iv) Take incidental to an otherwise lawful activity caused by: (A) Development practices that: (1) Maintain existing structures, and build or rebuild structures that occur within the existing footprint of previously developed areas;(2) Build new structures that occur within 100 feet of existing structures on an individual private landowner's property and with a new footprint less than 1,000 square feet, such as a pool or shed associated with an existing house;(3) Install culverts for individual landowners not associated with housing developments on lands greater than one acre;(4) Build platforms or boardwalks for recreational purposes on conservation lands that allow sunlight of sufficient levels to maintain herbaceous groundcover; and(5) Build paths used for nonmotorized activities as long as the project footprint, including construction impacts, alter no more than 5 percent of the acreage in core or secondary soils within lands under a conservation easement.(B) Certain land management activities, including:(1) Silvicultural (forestry) activities located in secondary soils that follow State best management practices (BMPs);(2) Prescribed burning and wildfire control efforts when following State BMPs, guidelines, or permit conditions;(3) Herbicide application activities targeting exotic plants or shrub species when following all other State and Federal BMPs, guidelines, or permit conditions; and(4) Agricultural maintenance activities in pasture and rangelands (including cattle operations) that were established prior to January 3, 2018, and that implement State and Federal BMPs for existing farms and ranches if they have no indirect impacts to adjacent Panama City crayfish habitat.(C) Utility actions, including: (1) Ditch mowing and maintenance outside of critical habitat units;(2) Ditch mowing or maintenance within critical habitat units after development of BMPs in coordination with the local Service office;(3) Culvert replacements or maintenance on individual landowner properties that do not adversely affect, but improve or restore, the natural hydrology; and(4) After coordination with the local Service office, the following activities: Maintenance associated with rights-of-way (including mowing, use of herbicides, and mechanical side trimming); powerline and pole placements and replacements; replacement of critical structural components, such as crossarms, insulators, conductors, etc.; and directional boring by utility owners.(v) Possess and engage in other acts with unlawfully taken wildlife, as set forth at § 17.21(d)(2) for endangered wildlife.(c) Big Creek crayfish (Faxonius peruncus) and St. Francis River crayfish (Faxonius quadruncus). (1)Prohibitions. The following prohibitions that apply to endangered wildlife also apply to the Big Creek crayfish and the St. Francis River crayfish. Except as provided under paragraph (c)(2) of this section and §§ 17.4 and 17.5 , it is unlawful for any person subject to the jurisdiction of the United States to commit, to attempt to commit, to solicit another to commit, or cause to be committed, any of the following acts in regard to this species: (i) Import or export, as set forth at § 17.21(b) for endangered wildlife.(ii) Take, as set forth at § 17.21(c)(1) for endangered wildlife. Activities that could result in take are those that: (A) Impact crayfish habitat, riparian areas adjacent to crayfish sites, or habitat between connecting sites such that the species' reproduction or survival will be impacted or the effects of woodland crayfish invasion will be exacerbated. Such activities include, but are not limited to:(1) Construction of instream low-water crossings;(2) Destruction of riparian habitat that results in excessive sedimentation;(3) Bridge construction; and(B) Lead to the introduction of heavy metals into streams. Such activities include, but are not limited to, heavy metal mining.(C) Appreciably negatively affect water quality, chemistry, or quantity such that the species' reproduction or survival will be impacted. Such activities may include, but are not limited to, the release of wastewater effluent and agricultural runoff.(D) Impact hydrological flows such that the species' reproduction or survival will be impacted. Such activities include, but are not limited to, construction of dams, modification of stream channels, and surface and groundwater withdrawals.(E) Facilitate the spread of woodland crayfish or introduce additional woodland crayfish in occupied Big Creek crayfish or St. Francis River crayfish stream reaches. Such activities may include, but are not limited to, bait bucket dumping.(iii) Possession and other acts with unlawfully taken specimens, as set forth at § 17.21(d)(1) for endangered wildlife.(iv) Interstate or foreign commerce in the course of commercial activity, as set forth at § 17.21(e) for endangered wildlife.(v) Sale or offer for sale, as set forth at § 17.21(f) for endangered wildlife.(2)Exceptions from prohibitions. In regard to this species, you may:(i) Conduct activities as authorized by a permit under § 17.32 .(ii) Take, as set forth at § 17.21(c)(2) through (c)(4) for endangered wildlife.(iii) Take, as set forth at § 17.31(b) .(iv) Take incidental to an otherwise lawful activity caused by: (A) Restoration activities or other activities that will result in an overall benefit to one or both of the species or their habitat that are completed in coordination with the Missouri Ecological Services Field Office. Such activities include, but are not limited to, stream bank stabilization, habitat restoration, heavy metal remediation, and replacement of low water crossings that obstruct movement of aquatic organisms with crossings that facilitate the movement of aquatic species (aquatic organism passages).(B) A person conducting research or education under a valid Missouri Department of Conservation Wildlife Collector's permit.(v) Possess and engage in other acts with unlawfully taken wildlife, as set forth at § 17.21(d)(2) for endangered wildlife.47 FR 43701, Oct. 4, 1982, as amended at 87 FR 576 , Jan. 5, 2022; 88 FR 25538 , Apr. 27, 2023; 89 FR 23940 , Apr. 5, 2024 87 FR 576 , 2/4/2022; 88 FR 25538 , 5/30/2023; 89 FR 23940 , 5/6/2024