Intersexes in Mississippi River shovelnose sturgeon sampled below Saint Louis, Missouri, USA

2000 ◽  
Vol 50 (1-5) ◽  
pp. 247-250 ◽  
Author(s):  
J.C Harshbarger ◽  
M.J Coffey ◽  
M.Y Young
Keyword(s):  
Mississippi River ◽  
Saint Louis ◽  
Shovelnose Sturgeon

scholarly journals Integrative analysis of DNA, macroscopic remains and stable isotopes of dog coprolites to reconstruct community diet

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kelsey E. Witt ◽  
Karthik Yarlagadda ◽  
Julie M. Allen ◽  
Alyssa C. Bader ◽  
Mary L. Simon ◽  
...  
Keyword(s):  
Mississippi River ◽  
Pathogenic Bacteria ◽  
Intestinal Parasites ◽  
Dna Amplification ◽  
Late Woodland ◽  
Integrative Analysis ◽  
Archaeological Sites ◽  
Human Diet ◽  
Saint Louis ◽  
Fecal Microbiome

AbstractPaleofeces or coprolites are often used to reconstruct diet at archaeological sites, usually using macroscopic analyses or targeted DNA amplification and sequencing. Here we present an integrative analysis of dog coprolites, combining macroscopic analyses, stable isotope measurements, and DNA shotgun sequencing to examine diet and health status. Dog coprolites used in this study were recovered from the Janey B. Goode and East Saint Louis archaeological sites, both of which are located in the American Bottom, an extensive Mississippi River floodplain in Southwestern Illinois. Based on the context of recovery, coprolites are assigned to the Late Woodland and Terminal Late Woodland periods (ca. 600–1050 AD). Given the scarcity of human remains from this time period, these dog coprolites can be useful as a proxy for understanding human diet during the Late Woodland period. We find that the Late Woodland dogs consumed a variety of fish as well as bird and plant taxa, possibly including maize, and also harbored intestinal parasites and pathogenic bacteria. By sequencing the fecal microbiome of the coprolites, we find some similarities to modern dog microbiomes, as well as specific taxa that can be used to discriminate between modern and ancient microbiomes, excluding soil contaminants. As dogs are often used as a surrogate to assess human diet, humans living with these dogs likely had a similar diet and were affected by similar parasites. These analyses, when integrated, show a more comprehensive view of ancient dog and human diet and health in the region during the initial expansion of maize agriculture than any individual method could alone.

Age, Growth, and Mortality of Shovelnose Sturgeon in the Lower Mississippi River

1998 ◽  
Vol 18 (3) ◽  
pp. 725-730 ◽  
Author(s):  
James V. Morrow ◽  
James P. Kirk ◽  
K. Jack Killgore ◽  
Steven G. George
Keyword(s):  
Mississippi River ◽  
Shovelnose Sturgeon ◽  
Lower Mississippi River

Seasonal Diet Composition of Adult Shovelnose Sturgeon in the Middle Mississippi River

2011 ◽  
Vol 165 (2) ◽  
pp. 355-363 ◽  
Author(s):  
Justin R. Seibert ◽  
Quinton E. Phelps ◽  
Sara J. Tripp ◽  
James E. Garvey
Keyword(s):  
Mississippi River ◽  
Diet Composition ◽  
Shovelnose Sturgeon ◽  
Middle Mississippi River

scholarly journals Timely Events in Their Interrelation to Paddlefish and Sturgeon Harvest from 1945-2010

2018 ◽  
Vol 46 (2018) ◽  
pp. 62-66
Author(s):  
Ryan N. Hupfeld ◽  
Quinton E. Phelps
Keyword(s):  
Mississippi River ◽  
Commercial Fishing ◽  
Natural Ecosystem ◽  
The Caspian Sea ◽  
Shovelnose Sturgeon ◽  
Inland River ◽  
Commercial Harvest ◽  
Inland Rivers ◽  
Fishery Collapse ◽  
International Events

Abstract Due to the high amounts of harvest of natural fish populations, overexploitation can occur and subsequently lead to depleted fisheries. This is especially true for commercially exploited roe-bearing species that exhibit late age at maturation and intermittent spawning. Overexploitation can create an imbalance in natural ecosystem function and in turn jeopardize the livelihood of commercial fishers. Despite the problems created by overexploitation, trends of commercial harvest on large inland river roe-bearing populations have received minimal attention. As such, we evaluated trends in commercial fishing data from 1945-2010 for two roe-bearing species (paddlefish Polyodon spathula and shovelnose sturgeon Scaphirhynchus platorynchus) from two of the largest inland rivers in North America (Mississippi River and Missouri River) adjacent to Missouri. Commercial sturgeon and paddlefish catch has varied from ∼160 to 35,150 kg over the course of the 55-year duration. Abnormally high catches corresponded to initiation of worldwide caviar markets, onset of extensive regulations on the Missouri and Mississippi rivers, and the Caspian Sea fishery collapse; respectively. Further, our results suggest that the harvest of sturgeon and paddlefish have increased since 1945 and may be influenced by local, regional, and international events. Despite the increase in harvest and the possibility of overharvest, commercial fishing regulations have not been thoroughly evaluated for effectiveness. Further evaluation of current management and regulations of these paddlefish and sturgeon fisheries is suggested, especially considering these fisheries may be influenced by local, regional, and international events. Taking potentially influential events into consideration when evaluating and implementing regulations and authorizing commercial harvest permits are vital in sustaining a long term commercial fishery and protecting the livelihood of commercial fishers.

Range-wide age and growth characteristics of shovelnose sturgeon from mark–recapture data: implications for conservation and management

2015 ◽  
Vol 72 (1) ◽  
pp. 71-82 ◽  
Author(s):  
Martin J. Hamel ◽  
Mark A. Pegg ◽  
Reuben R. Goforth ◽  
Quinton E. Phelps ◽  
Kirk D. Steffensen ◽  
...  
Keyword(s):  
River Basin ◽  
Mississippi River ◽  
Missouri River ◽  
Large River ◽  
Population Connectivity ◽  
Growth Characteristics ◽  
Age And Growth ◽  
Mark Recapture ◽  
Shovelnose Sturgeon ◽  
Commercial Harvest

We used mark–recapture data from shovelnose sturgeon (Scaphirhynchus platorynchus) to describe range-wide growth characteristics and developed a model to estimate ages. Data were solicited throughout much of the current distribution of shovelnose sturgeon, specifically from the mainstem Missouri and Mississippi rivers and their tributaries. Shovelnose sturgeon exhibited variable growth among locations; however, adult fish exhibited almost no growth after they reached a particular size, presumably the size at sexual maturity. Shovelnose sturgeon from the Mississippi River basin attained greater maximum sizes and ages compared with the Missouri River basin. However, two populations from the Mississippi River that received high exploitation from commercial harvest had truncated age distributions with smaller asymptotic lengths. Lower Missouri River populations were characteristic of exploited populations (i.e., smaller fish and reduced longevity), presumably a result of anthropogenic effects. Wide discrepancies in maximum age and size suggest shovelnose sturgeon are capable of displaying phenotypic plasticity in response to exploitation or environmental influences. Determining metapopulation dynamics is a priority because it is unknown how population connectivity may influence dynamic rate functions and persistence of large-river fishes. Identifying potential source–sink connections in terms of population dynamics may provide a template for direction of future restoration and recovery efforts.

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