Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Mississippi River ◽  
Management Strategies ◽  
Movement Patterns ◽  
Information Criterion ◽  
Ohio River ◽  
Blue Catfish ◽  
Receiver Array ◽  
River Confluence ◽  
Total Movement ◽  
Riverine Fish

<em>Abstract</em>.—Blue catfish <em>Ictalurus furcatus</em> are a commercially and recreationally important species throughout their range, in which many states have differing management strategies. Before management strategies can be implemented to achieve specific goals, understanding seasonal habitat use and movement patterns is necessary to determine the appropriate spatial scale for management. Therefore, we determined the extent and timing of blue catfish movement in the upper Mississippi River (UMR). During fall 2006 through spring 2010, 92 blue catfish (ranging from 490 to 1,025 mm total length) were captured, implanted with ultrasonic transmitters, and released in the Lock and Dam 26 area. Movement was quantified in the UMR from below Lock and Dam 19 down to the Ohio River confluence, including major tributaries, by examining the average (kilometers moved between detections/number of detections) and maximum (total number of kilometers moved across all detections) movements for each fish throughout the life of each transmitter that was detected multiple times by the stationary receiver array. Of the 82% of fish detected by stationary receivers, movement occurred from Mississippi River kilometer 459 to the Ohio River confluence, with individual blue catfish movement ranging from a maximum of 689 river kilometers to a minimum of 1.3 river kilometers. Fifteen (19%) of the fish tagged in the UMR moved into one or more of major tributaries (the Missouri, Illinois, Meramec, and Ohio rivers) while 31 (41%) of the fish stayed in the Alton area year-round and 30 (40%) blue catfish moved down into the open river to possibly overwinter. When investigating total movement by tagged blue catfish each month, the greatest movement occurred during periods of changing water temperatures and high discharge. This was further supported by the Akaike’s information criterion, with the interactive model of temperature and discharge resulting in the most support for triggering blue catfish movement. Understanding these movement patterns and seasonal habitat requirements for spawning, foraging, or refuge of riverine fish is essential for effective management of these highly mobile fish.

scholarly journals Nutrient dynamics and stream order influence microbial community patterns along a 2914 km transect of the Mississippi River

2016 ◽  
Author(s):  
Michael W. Henson ◽  
Jordan Hanssen ◽  
Greg Spooner ◽  
Patrick Fleming ◽  
Markus Pukonen ◽  
...  
Keyword(s):  
Water Quality ◽  
Microbial Community ◽  
Mississippi River ◽  
Nutrient Dynamics ◽  
18S Rrna Gene ◽  
Rrna Gene ◽  
Ohio River ◽  
Core Microbiome ◽  
Water Transportation ◽  
River Confluence

AbstractDraining 31 states and roughly 3 million km2, the Mississippi River (MSR) and its tributaries constitute an essential resource to millions of people for clean drinking water, transportation, agriculture, and industry. Since the turn of the 20thcentury, MSR water quality has continually rated poorly due to human activity. Acting as first responders, microorganisms can mitigate, exacerbate, and/or serve as predictors for water quality, yet we know little about their community structure or ecology at the whole river scale for large rivers. We collected both biological (16S and 18S rRNA gene amplicons) and physicochemical data from 38 MSR sites over nearly 3000 km from Minnesota to the Gulf of Mexico. Our results revealed a microbial community composed of similar taxa to other rivers but with unique trends in the relative abundance patterns among phyla, OTUs, and the core microbiome. Furthermore, we observed a separation in microbial communities that mirrored the transition from an 8thto 10thStrahler order river at the Missouri River confluence, marking a different start to the lower MSR than the historical distinction at the Ohio River confluence in Cairo, IL. Within MSR microbial assemblages we identified subgroups of OTUs from the phyla Acidobacteria, Bacteroidetes, Oomycetes, and Heterokonts that were associated with, and predictive of, the important eutrophication nutrients nitrate and phosphate. This study offers the most comprehensive view of MSR microbiota to date, provides important groundwork for higher resolution microbial studies of river perturbation, and identifies potential microbial indicators of river health related to eutrophication.

Fishery Resources, Environment, and Conservation in the Mississippi and Yangtze (Changjiang) River Basins

2016 ◽  
Keyword(s):  
Gulf Of Mexico ◽  
Mississippi River ◽  
Fish Fauna ◽  
Missouri River ◽  
River Basins ◽  
Nonnative Species ◽  
Habitat Alteration ◽  
Ohio River ◽  
Changjiang River ◽  
River Confluence

<em>Abstract</em>.—This chapter provides a listing of fishes known to be present in the Mississippi River from the headwaters at Lake Itasca, Minnesota to the Gulf of Mexico terminus. A total of 188 species are presently known from the Mississippi River, including 3 diadromous species and 17 nonnative species that have established self-sustaining populations in one or more reaches of the Mississippi River. Species are classified into three relative abundance categories and noted as residents, peripherals, introduced (established nonnatives), or strays (introduced but not established). The diversity of fishes varies longitudinally with 78 species in the reach from the headwaters to St. Anthony Falls; 113 and 105 species in the upper (Upper St. Anthony Lock and Dam to Pool 13) and lower (Pools 14–26) impounded reaches, respectively; and 121 and 136 species in the upper (Missouri River confluence to Ohio River confluence) and lower (Ohio River to the Gulf of Mexico outlet) free-flowing reaches, respectively. Although the composition of the Mississippi River fish fauna has changed little despite more than 80 years of habitat alteration, the extirpation of five species in individual reaches of the river may be a forewarning of a system losing resiliency and indicate the need for habitat conservation and rehabilitation to conserve the biodiversity of North America’s largest river.

Pattern Recognition of Travel Mobility in a City Destination: Application of Network Motif Analytics

2021 ◽  
pp. 004728752110247
Author(s):  
Sangwon Park ◽  
Ren Ridge Zhong
Keyword(s):  
Network Science ◽  
Network Motif ◽  
Interdisciplinary Approach ◽  
Movement Patterns ◽  
Urban Tourism ◽  
Lengths Of Stay ◽  
Sustainable Planning ◽  
Total Movement ◽  
City Network ◽  
Travel Behaviors

Urban tourism is considered a complex system. Tourists who visit cities have diverse purposes, leading to multifaceted travel behaviors. Understanding travel movement patterns is crucial in developing sustainable planning for urban tourism. Built on network science, this article discusses 12 key topologies of travel patterns/flow occurring in a city network by applying network motif analytics. The 12 significant types of travel mobility can account for approximately 50% of the total movement patterns. In addition, this study presents variations in travel movement patterns depending on not only different lengths of stay in topological structures of travel mobility, but also relative proportions of each type. As a result, this article suggests an interdisciplinary approach that adopts the network science method to better understand city travel behaviors. Important methodological and practical implications that could be useful for city destination planners are suggested.

scholarly journals Total Organic Carbon Assessment in Soils Cultivated with Agave tequilana Weber in Jalisco, Mexico

2020 ◽  
Vol 13 (1) ◽  
pp. 208
Author(s):  
Celia De La Mora-Orozco ◽  
José G. Flores-Garnica ◽  
Lucia M. Vega-Ramírez ◽  
Irma J. González-Acuña ◽  
Juan Nápoles-Armenta ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Management Practices ◽  
Water Saturation ◽  
Management Strategies ◽  
Information Criterion ◽  
Agave Tequilana ◽  
Tukey Test ◽  
Significant Difference ◽  
Agriculture Management

The Agave tequilana Weber is an important commercial crop in the State of Jalisco, Mexico. However, the agave cultivation generates significant soil loss. For that reason, knowledge about the implementation of the agriculture management practices, such as manure application and the combination of inorganic fertilizers and manure, are relevant. The objective of this research was to determine the effect of agricultural management practices on the total organic carbon (TOC) in the soil in three study locations: Arandas, Tepatitlán, and Acatic in the Altos Sur region of Jalisco. A random sampling was carried out in each study location, 12 samples were obtained for each location at 0–30 cm deep, and a total of 36 samples were analyzed. The evaluated parameters were the potential hydrogen (pH), electrical conductivity (EC), bulk density (BD), soil-water saturation (SWS), total nitrogen (TN), and total organic carbon (TOC). Basic statistics and correlations between parameters were generated. In addition, to estimate TOC from a multivariate analysis, models were developed based on the lowest Akaike information criterion (AIC) and of the classification and regression trees (CART). ANOVA and Tukey test were determined. Results demonstrated a significant difference in the TOC percentages between the study locations. The Tukey test showed that there is no difference in TOC content between the Tepatitlán and Arandas sites, but there is a difference between these two sites and the Acatic. The latter resulted with the lowest values of TOC. Long-term studies are recommended to develop crop management strategies.

Movements and survival of sonically tagged farmed Atlantic salmon released in Cobscook Bay, Maine, USA

2006 ◽  
Vol 63 (7) ◽  
pp. 1218-1223 ◽  
Author(s):  
Frederick G. Whoriskey ◽  
Paul Brooking ◽  
Gino Doucette ◽  
Stephen Tinker ◽  
Jonathan W. Carr
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Coastal Zone ◽  
Coastal Region ◽  
Movement Patterns ◽  
Tidal Currents ◽  
Bay Of Fundy ◽  
Wild Salmon ◽  
Receiver Array ◽  
Farmed Atlantic Salmon

Abstract We sonically tagged and released farmed Atlantic salmon (Salmo salar) from a cage site in Cobscook Bay, Maine, USA. The fish were released in January (n = 75) and in April and May (n = 198) 2004 to study their movement patterns and survival and to assess the possibility of recapturing them. Inshore and offshore waters in this region are subject to intense tidal currents. Tagged salmon dispersed >1 km from the cage site within a few hours of their release. Mortality was high within Cobscook Bay and the surrounding coastal region (56% of the winter (January) releases; 84% of the spring (March) releases), probably the result of seal predation. Most surviving fish exited the coastal zone and entered the Bay of Fundy along the routes of the dominant tidal currents, passing through Canadian waters. No tagged fish were detected during the wild salmon spawning season in autumn 2004 in any of the 43 monitored salmon rivers draining into the Bay of Fundy, or during 2005 either in the Magaguadavic River, the site of the hatchery in which the fish were reared to the smolt stage, or by a limited coastal receiver array.

Long-term migration patterns and bisexual philopatry in a benthic shark species

2017 ◽  
Vol 68 (8) ◽  
pp. 1414 ◽  
Author(s):  
Nathan Charles Bass ◽  
Johann Mourier ◽  
Nathan A. Knott ◽  
Joanna Day ◽  
Tristan Guttridge ◽  
...  
Keyword(s):  
Management Strategies ◽  
Movement Patterns ◽  
Conclusive Evidence ◽  
Migration Route ◽  
Shark Species ◽  
Apex Predators ◽  
Arrival Times ◽  
And Bisexual ◽  
Australian Coastline ◽  
Port Jackson

Knowledge of the broad-scale movement patterns of sharks is essential to developing effective management strategies. Currently there is a large bias in studies focusing on species that are either large apex predators or found in tropical to subtropical regions. There is limited knowledge of the movements and migrations of benthic and temperate shark species. The present study used passive acoustic telemetry to investigate the movement patterns of a benthic shark species, the Port Jackson shark (Heterodontus portusjacksoni). Individuals were tagged with acoustic transmitters between 2012 and 2014 and their movements were monitored within Jervis Bay and along the east Australian coastline for up to 4 years. Male and female Port Jackson sharks demonstrated high levels of philopatry to both Jervis Bay and their tagging location across multiple years. Although males and females did not differ in their arrival times, females departed from Jervis Bay later than males. Approximately half the tagged individuals migrated in a southward direction, with individuals being detected at Narooma, Bass Strait and Cape Barron Island. This study provides conclusive evidence of bisexual philopatry in a benthic temperate shark species, confirming previous hypotheses, and presents the most detailed migration route for Port Jackson sharks to date.

scholarly journals Impacts of Whale-Watching on the Short-Term Behavior of Fin Whales (Balaenoptera physalus) in a Marine Protected Area in the Southeastern Pacific

2021 ◽  
Vol 8 ◽  
Author(s):  
Macarena Santos-Carvallo ◽  
Fernanda Barilari ◽  
María José Pérez-Alvarez ◽  
Laura Gutiérrez ◽  
Guido Pavez ◽  
...  
Keyword(s):  
Marine Protected Area ◽  
Management Strategies ◽  
Movement Patterns ◽  
Economic Benefits ◽  
Observation Point ◽  
Behavioral Patterns ◽  
Whale Watching ◽  
Balaenoptera Physalus ◽  
Fin Whales ◽  
Response Variables

Whale-watching (WW) is an activity which has been increasing worldwide due to the great interest of tourists and the economic benefits it provides to local communities. However, it has been reported that this activity affects the behavioral patterns of some cetaceans, although for some species such as the fin whale (Balaenoptera physalus) this has not been extensively studied. To identify the effects of WW on the behavioral patterns of this species, we studied its traveling and resting behaviors in a locality of north-central Chile from 2015 to 2018. Using a theodolite, we calculated the response variables of swim speed, directness index, and reorientation for each behavior. We used the number of WW boats and the WW scenarios of “before”, “during”, and “after” the presence of boats as possible factors to explain the differences in the response variables of the whales, along with the factors of year, month, group size, and distance from the observation point. Reorientation increased significantly and the directness index decreased significantly for both traveling and resting behaviors from “before” to “during” WW scenarios, indicating more erratic and sinuous movements in the presence of boats. These changes in movement patterns are a commonly reported evasion response of cetaceans to the presence of WW boats. For traveling behavior, the swimming speed significantly increased, and trends showed increased reorientation and a decrease in the directness index in the “after” WW scenario, which suggests perturbation of the whales potentially associated with the speed and the direction in which the boats left. During resting behavior, the trajectories of the fin whales became straighter (decrease in reorientation) as the number of boats increased, thus evasion (more erratic and sinuous movements) is a behavior used less by fin whales as the number of boats increases. Notwithstanding the fact that tourism development in the study area is small in scale, we found that WW generates adverse effects that are reflected in changes in the whales’ movement patterns. This kind of information is valuable to the adjustment and/or design of management strategies for the species, which is fundamental for WW to continue to be a sustainable activity.

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Population Dynamics ◽  
Channel Catfish ◽  
Mississippi River ◽  
Upper Mississippi River ◽  
Catch Per Unit Effort ◽  
Blue Catfish ◽  
Resource Monitoring ◽  
Flathead Catfish ◽  
Unit Effort ◽  
Catch Rates

<em>Abstract</em>.—Using Long Term Resource Monitoring Program data collected from impounded (Pool 26) and unimpounded (Open River) reaches of the upper Mississippi River, we investigated population dynamics of flathead catfish <em>Pylodictis olivaris</em>, channel catfish <em>Ictalurus punctatus</em>, and blue catfish <em>I. furcatus</em> from random sites located in side channel border (SCB) and main channel border (MCB) habitats. Objectives were to (1) compare trends (1993–2007) of three catfishes collected in Pool 26 and Open River reaches of the upper Mississippi River, and (2) provide needed information to managers on population dynamics through time using a binary gear approach of active (i.e., daytime electrofishing) and passive gears (hoopnetting). Active gears resulted in a higher catch per unit effort (CPUE) of all catfishes in each habitat–reach combination as compared to passive gears. Passive gears resulted in negligible catches of blue catfish and flathead catfishes (e.g., mean of <1 fish/net night). Catch per unit effort using active gear resulted in a greater number of channel catfish captured in Pool 26 compared to the Open River, with Open River SCB habitat having the lowest CPUE in most years. Blue catfish in the Open River had a higher CPUE using active gear as compared to Pool 26, with the Open River MCB having the greatest CPUE. Flathead catfish had a higher CPUE in MCB habitat compared to SCB habitat, with the Open River MCB having the highest CPUE in most years. However, declining trends in flathead catfish appears to be occurring in Open River habitats while trends in flathead catfish appear to be slightly increasing in Pool 26. The most common length-classes captured were substock and stock-sized fish regardless of habitat, species, or reach. Trends for channel catfish were easily determined due to high catch rates; however, more monitoring and enhanced sampling is needed to accurately assess flathead catfish and blue catfish trends and to accurately determine demographics for all three species.

Paddlefish Management, Propagation, and Conservation in the 21st Century

2009 ◽  
Keyword(s):  
Mississippi River ◽  
First Year ◽  
State Agencies ◽  
Ohio River ◽  
Independent Data ◽  
Arkansas River ◽  
Commercial Harvest ◽  
Harvest Data ◽  
Sport Fisheries ◽  
Anthropogenic Alterations

<em>Abstract</em>.—Paddlefish <em>Polyodon spathula </em>have been intensively harvested in both sport and commercial fisheries. Recent harvests (2000–2006) were surveyed from state agencies and compared to historical harvests (1965– 1975). Seven major sport fisheries had recent annual harvests greater than 1,000 fish, and most large sport fisheries appeared to have sustainable harvests due to intensive management. Recent commercial harvest was greater than sport harvest across the species’ range. Most of the commercial harvest was from Arkansas, Kentucky, and Tennessee. Annual commercial harvest from the Ohio River increased from 6,000 to 196,000 kg from 1965–1975 to 2000–2006. Annual harvest remained substantial from the Arkansas River (37,000 kg), the lower Tennessee River (121,000 kg), and the Mississippi River (103,000 kg). Harvests of paddlefish (sport and commercial) compiled from the literature were highly variable and ranged between 0.01 and 5.06 fish/ ha and 0.04–43.43 kg/ha (median = 0.12 fish/ha, 1.73 kg/ha). Stock depression has been associated with a first-year harvest as low as 1.46 kg/ha, and harvests greater than 5 kg/ha were usually associated with overfishing or opening a previously closed fishery. Case histories from the Tennessee and Ohio River systems documented that paddlefish were susceptible to overharvest in lentic waters and river reservoirs, but the threat posed by commercial harvest from large rivers will remain unresolved until more fisheries-independent data becomes available. Anthropogenic alterations to habitat, overreliance on harvest data, and lack of fisheries-independent data limit our historical understanding of the degree of threat that harvest is to paddlefish populations.

The Archaic of the Lower Mississippi Valley

1961 ◽  
Vol 26 (3Part1) ◽  
pp. 317-323 ◽  
Author(s):  
William G. Haag
Keyword(s):  
Mississippi River ◽  
Gulf Coast ◽  
General Pattern ◽  
Ohio River ◽  
Mississippi Valley ◽  
Eastern United States ◽  
Alluvial Valley ◽  
Lower Mississippi Valley ◽  
General Acceptance ◽  
Poverty Point

AbstractNo archaeological remains which the majority of specialists will accept as Archaic have been found in the Mississippi Valley from the mouth of Ohio River to the Gulf of Mexico. Despite this, the literature reflects a general acceptance of the belief that the Archaic stage is well represented in the Lower Valley. The presence of concentrated Archaic populations in northern Alabama and western Tennessee and Kentucky has given comparative support to these expectations and has provided part of the source for some of the hypothetical statements in the literature of what the Lower Valley Archaic ought to be like. Although the failure of writers to agree on a definition of Archaic which will satisfy the evidence in all of the areas of Eastern United States has contributed to the problem of identifying Archaic materials in the Lower Valley, the lack of these remains can best be explained by the geology of the region. The cutting and filling of the Alluvial Valley during the Pleistocene changes in sea level have removed or buried all of the surfaces that might have been occupied by Archaic peoples. The surface of the Alluvial Valley is everywhere less than 5000 years old. Possible Late Archaic sites are located on old stable beach ridges or near enough to the Pleistocene terraces not to have been included in the general pattern of Recent coastal subsidence. It is concluded that Archaic or earlier materials are absent in the Lower Alluvial Valley of the Mississippi River. Neither Tchefuncte nor Copell are accepted as Archaic; Poverty Point is viewed as transitional from an Upper Archaic tradition to some phase of the Formative stage. Poverty Point materials may not be expected to be found in quantity along the Gulf Coast of the Mississippi Delta region.

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