div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=document-since-its-introduction-to-scotland-in-the-1980s-the-non-native-north-americanhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: Since its introduction to Scotland in the 1980s the non- native North American signal crayfish Pacifastacus leniusculus see Figure 1 has become well established in the wild loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsnetreader033viewer20220419165e69a8d5ff42ee23382f3a52html5thumbnails1jpg width=140 height=200 divdiv