Item talk:Q316033

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   "name": "Evaluate propagation efforts and determine dispersal patterns for Quadrula fragosa from tagged, artificially infested host fish (Ictalurus punctatus) in the St. Croix National Scenic Riverway (SACN)",
   "identifier": [
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       "value": "70242724",
       "url": "https://pubs.usgs.gov/publication/70242724"
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       "value": 70242724
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       "name": "Final Report"
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   "datePublished": "2023",
   "dateModified": "2024-03-28",
   "abstract": "The St. Croix National Scenic Riverway (SACN) has been the site of propagation and restoration efforts for two federally endangered unionid mussels: Higgins\u2019 Eye, Lampsilis higginsii and Winged Mapleleaf (WML), Quadrula fragosa. Since about 2000, government agencies have collaboratively developed techniques to successfully propagate Higgins\u2019 Eye and reintroduce the captive-reared subadult mussels into rehabilitated habitats in the upper Mississippi River Basin and several tributaries, including the SACN. However, propagation efforts for the WML have had limited success from 2003 to present. The population of WML in the SACN has high value because it is physically isolated and genetically distinct from four southern populations, and it is the only known self-sustaining population within the upper Mississippi River. Unionids have a complex reproductive cycle that includes a parasitic larval stage (glochidia) that requires species-specific fish hosts. WML are one of the few species that are fall, short-term (~6 weeks) brooders\u2014brooding begins at end of August. In the SACN, Channel Catfish (Ictalurus punctatus) are the only known host for WML and glochidia are assumed to overwinter on their host fish and detach the following spring. Research has shown that holding hatchery reared channel catfish that are infested with WML glochidia in cages, either in situ or in a hatchery, over winter has been a challenge due to high fish mortality; rearing juveniles after transformation has also resulted in high mortality rates and juvenile loss (Wege et al. 2007). The importance of the overwintering parasitic period and the overall health of the host fish for successful transformation of juvenile WML is unknown, but these key criteria could play an important role in successful propagation efforts. This research has three objectives: (1) compile historic data from >14 years of Q.\u00a0fragosa propagation efforts into a searchable database to identify potential knowledge gaps that could be limiting its success, (2) explore in situ and ex situ propagation techniques to optimize production of Q.\u00a0fragosa juveniles, and (3) characterize the movement pattern of Channel Catfish that are artificially inoculated with the SACN strain of Q. fragosa to identify potential juvenile release survey locations in future years.",
   "description": "5 p.",
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     "name": "National Park Service (NPS)"
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   "author": [
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       "@type": "Person",
       "name": "Bartsch, Michelle mbartsch@usgs.gov",
       "givenName": "Michelle",
       "familyName": "Bartsch",
       "email": "mbartsch@usgs.gov",
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         "value": "0000-0002-9571-5564",
         "url": "https://orcid.org/0000-0002-9571-5564"
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           "@type": "Organization",
           "name": "Upper Midwest Environmental Sciences Center",
           "url": "https://www.usgs.gov/centers/upper-midwest-environmental-sciences-center"
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   "funder": [
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       "@type": "Organization",
       "name": "Upper Midwest Environmental Sciences Center",
       "url": "https://www.usgs.gov/centers/upper-midwest-environmental-sciences-center"
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