{"id":11487,"date":"2020-05-01t05:30:42","date_gmt":"2020-05-01t05:30:42","guid":{"rendered":"http:\/\/dpetrov.2create.studio\/planet\/wordpress\/the-big-catch-that-got-away-hope-lingers-as-covid-19-puts-midwestern-invasive-fish-prevention-on-the-bench\/"},"modified":"2020-05-01t05:30:42","modified_gmt":"2020-05-01t05:30:42","slug":"invasive-fish-prevention-covid19","status":"publish","type":"post","link":"\/\/www.getitdoneaz.com\/story\/invasive-fish-prevention-covid19\/","title":{"rendered":"the big catch that got away: hope lingers as covid-19 puts midwestern invasive fish prevention on the bench"},"content":{"rendered":"

fishermen caught more than 50 asian carp<\/a> in the upper mississippi river basin in mid-march \u2013 the largest catch in previously non-infected waters. now, state governments decided officials usually on the frontline of carp containment are \u201cnonessential workers\u201d, meaning they\u2019re under a shelter in place order in the midst of the coronavirus pandemic, creating uncertain danger for carp-free waters.<\/p>\n

\u201cthis latest capture is disturbing,\u201d said mark fritts, a u.s. fish and wildlife services ecologist based in lacrosse, wisconsin. \u201cwe’ve never seen that many fish caught at the same time in this region.\u201d<\/p>\n

in the upper mississippi and illinois rivers, asian carp reproduce rapidly, have no natural competitors and out-compete native fish for food supply and space, which devastates native fish populations \u2013 in some streams, they make up 75% of fish biomass<\/a>. asian carp, which can weigh between 60 and 110 pounds, are also notorious for jumping up to three meters out of the water when spooked by boat motors or loud sounds \u2013 creating a public safety risk and threatening a $7-billion <\/a>sport-fishing market.<\/p>\n

despite prevention measures, like government-contracted asian carp fisherman and dam barriers, asian carp have been slowly spreading upstream to the upper mississippi river and the great lakes. prior to this, fritts believed that most of the population in the upper mississippi river was confined below the quad-city region in illinois and iowa. now, he\u2019s not so sure.<\/p>\n

james lamer, a large river ecologist with the illinois natural history survey, said heavy flooding in the mississippi river basin last spring may have caused the fish to spawn upstream.<\/p>\n

or, it could\u2019ve been sheer luck.<\/p>\n

according to lamer\u2019s research, asian carp play favorites. from 2013 to 2016, lamer and his team in illinois tagged and tracked asian carp migration through the illinois and mississippi rivers\u2019 channels in search for some sort of pattern. they found that<\/a> carp species and hybrids are more or less mobile based on different water temperatures, flow and volume, which makes their spread a little bit more predictable.<\/p>\n

\u201cthe water temperatures are still really low, and that’s when they can aggregate,\u201d lamer said. \u201clacrosse might have got lucky and just got a lot of fish in that one haul just because the carp tend to congregate during those cold-water temperatures in certain areas.\u201d<\/p>\n

from his research, lamer knows that april weather brings favorable conditions to asian carp in illinois\u2019 contained backchannels, which is a crucial time for government-contracted fishermen and researchers to extract invasive carp from the streams.<\/p>\n

but due to the spread of coronavirus throughout the united states, lamer said they might not be able to get out on the water and curb their spread.<\/p>\n

\u201cthe only thing that we can do in the meantime is analyze data and try to figure out what we have going on with the data we have,\u201d he said.<\/p>\n

but lamer isn\u2019t too concerned \u2013 his research gives some hope to midwestern waterways. asian carp are finicky about their environment. their preference for deep waters could keep them out of uninfected areas if the water levels continue at their current low levels, like they have been for the last couple of weeks.<\/p>\n

\u201clong story short, i think any damage of not fishing for the one to two months off the water due to coronavirus can be mitigated when fishermen return to the water,\u201d he said.<\/p>\n

even if water conditions are perfect, history shows the mississippi\u2019s unpredictable environment can be a natural barrier to carp mobility. for example, lamer\u2019s tagged carp had an abundant year in 2016, but had barely any sign of reproduction the next two years. lamer and his team think it\u2019s because changing water flow pushed unhatched carp eggs out of the upper mississippi\u2019s uninfected waters.<\/p>\n

lamer is keeping a positive attitude, but the \u201cifs\u201d are adding up. in the worst-case scenario, asian carp spread to uninfected waters and decimate native fish populations and the fishing economy.<\/p>\n

the midwestern waterways\u2019 fate is up to mother nature.<\/p>\n

\u201casian carp have very variable recruitment and reproduction, and so if we had the water conditions are stable for them like they were in 2016, then it could be problematic if we\u2019re not out there removing fish,\u201d lamer said. \u201cif conditions aren’t conducive to spawning or movement and all of the gates stay in the water because we don\u2019t get major flooding, it may not be as problematic.<\/u>\u201d<\/p>\n

\u201cit’s kind of a gamble \u2013 we’re hoping for the latter,\u201d he added.<\/p>\n

fritts is less concerned, too. last year mississippi\u2019s flooding set back his team\u2019s research, and he said every year has its own challenges.<\/p>\n

\u201cmy rocket is set on launch as soon as they give me permission to get back out there. but we’ll just do what we can. these forces are bigger than us and we’ll just do our best,\u201d he said.<\/p>\n

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invasive species don’t follow shelter in place orders like the officials tasked with containing them. for the midwest’s invasive asian carp, the effects of halting prevention measures range from not too bad to detrimental.<\/p>\n","protected":false},"author":9962,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4905],"tags":[4419,637,3519,3421,1248,256,2872,4420,1464,271],"storyfest_categories":[],"class_list":["post-11487","post","type-post","status-publish","format-standard","hentry","category-adaptation","tag-asian-carp","tag-covid-19","tag-farming-fish","tag-fish","tag-fishing","tag-invasive-species","tag-lakes","tag-midwest","tag-mississippi-river","tag-waterways"],"acf":[],"yoast_head":"\nthe big catch that got away: hope lingers as covid-19 puts midwestern invasive fish prevention on the bench - planet forward<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"\/\/www.getitdoneaz.com\/story\/invasive-fish-prevention-covid19\/\" \/>\n<meta property=\"og:locale\" content=\"en_us\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"the big catch that got away: hope lingers as covid-19 puts midwestern invasive fish prevention on the bench - 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