Border Wall Blocks Sonora Chub's Critical Habitat in California Gulch

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Border wall construction blocks vital water access for threatened Sonora chub fish population in Arizona's California Gulch.

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Newly built wall segment blocks streamflow affecting rare desert fish survival across US-Mexico border.

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Fish population faces extinction risk as wall prevents genetic exchange with Mexican populations and upstream migration.

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Center for Biological Diversity petitioned to protect 4-mile stretch of California Gulch as critical habitat in 2023.

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US Fish and Wildlife Service delays habitat protection decision until 2027 despite acknowledging urgent needs.

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Climate change fuels region's megadrought while mining and livestock damage threaten fish survival.

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Experts push for carefully designed culverts in border infrastructure to restore natural streamflow patterns.

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Small, chubby Sonora chub develops distinctive red coloration when in breeding condition.

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Scientists urge immediate federal action to protect fish population from mounting environmental pressures.

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[{"selector":"#anim-8c7dc90e-5635-4fd2-934e-c8310b42e3f2","keyframes":{"opacity":[0,1]},"delay":200,"duration":3000,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-834eeee3-9c8a-4018-9461-73a577c1c32c","keyframes":{"opacity":[0,1]},"delay":200,"duration":3000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-4a3e9f8a-04d8-45c0-875a-fa0cc36aa2bb","keyframes":{"transform":["translate3d(-114.50152%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":200,"duration":3000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-d86d0ff7-5953-4445-9278-ef1dd30cc8cc","keyframes":{"opacity":[0,1]},"delay":700,"duration":3000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-060de832-f013-4c53-94b7-f6e06367e657","keyframes":{"transform":["translate3d(115.55555%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":700,"duration":3000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Genetically Distinct Fish-Eating Herring Found in Baltic Learn more