Academic literature on the topic 'Saint Esprit River Watershed'

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Journal articles on the topic "Saint Esprit River Watershed"

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Dissart, Jean-Christophe, Laurie Baker, and Paul J. Thomassin. "The Economics of Erosion and Sustainable Practices: The Case of the Saint-Esprit Watershed." Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie 48, no. 2 (July 2000): 103–22. http://dx.doi.org/10.1111/j.1744-7976.2000.tb00269.x.

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Dayyani, Shadi, Shiv O. Prasher, Ali Madani, Chandra A. Madramootoo, and Peter Enright. "Evaluation of WARMF model for flow and nitrogen transport in an agricultural watershed under a cold climate." Water Quality Research Journal 48, no. 4 (November 1, 2013): 400–413. http://dx.doi.org/10.2166/wqrjc.2013.034.

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The Watershed Analysis Risk Management Framework (WARMF) model is adapted to simulate flow and nitrate-N transport in an agricultural watershed in Quebec, Canada. The model was evaluated for the St. Esprit Watershed (24.3 km2), which is a part of the 210 km2 St. Esprit river basin, a tributary of the L'Assomption Watershed (4,220 km2). WARMF's hydrologic calibration and validation was performed using data from the gauge station located at the outlet of the watershed. Water-quality data collected were used to guide water quality calibration/validation. Simulations were carried out from 1994 to 1996; data from 1994 and 1995 were used for model calibration and data from 1996 were used for model validation. The model performed reasonably well in simulating the hydrologic response and nitrate losses at the outlet of the watershed. The R2 between the observed and simulated monthly stream flow for calibration was 0.92, and that for validation was 0.94. The corresponding coefficients of efficiency (E) were 0.89 and 0.91. The R2 and E values for calibration/validation of NO3−-N loads simulation were 0.89/0.84 and 0.86/0.75, respectively. Thus, the model simulated monthly flow and nitrogen losses with a good degree of accuracy over the entire year.
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MacDonald, Graham K., and Elena M. Bennett. "Phosphorus Accumulation in Saint Lawrence River Watershed Soils: A Century-Long Perspective." Ecosystems 12, no. 4 (April 30, 2009): 621–35. http://dx.doi.org/10.1007/s10021-009-9246-4.

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Simoneau, Michel, John M. Casselman, and Réjean Fortin. "Determining the effect of negative allometry (length/height relationship) on variation in otolith shape in lake trout (Salvelinus namaycush), using Fourier-series analysis." Canadian Journal of Zoology 78, no. 9 (September 1, 2000): 1597–603. http://dx.doi.org/10.1139/z00-093.

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Geometric mean regression analysis between log(length) and log(height) of otoliths from lake trout (Salvelinus namaycush) from six lakes revealed that the growth of this structure was negatively allometric, indicating that otolith shape varies throughout the life of the fish. Otolith shape was quantified using harmonic amplitudes 2-10 (A2-A10) extracted from Fourier-series analyses. We found harmonic amplitudes 2 (A2) and 5 (A5) to be associated with the length/height relationship. Some recent studies have suggested that growth of fish otoliths affects their shape. Our results indicate that part of this otolith-growth effect could be due to an intrinsic change in shape associated with allometric nature of the length/height relationship. There were no differences in otolith shape between males and females. Otolith shape was also compared among the six populations. Major differences were observed between Lake Normand (Saint Maurice River watershed) and the five lakes in the Ottawa River watershed, suggesting that genotype could be an important factor affecting otolith shape. The percentage of reclassification using a discriminant function analysis was high (86%) for the Lake Normand population. Among populations from the Ottawa River watershed, differences in otolith shape were more subtle, with reclassification percentages ranging from 50 to 75%. However, one population in the Ottawa River watershed (Lake Duval), which was introduced as hatchery-raised individuals, differed slightly from the other populations from the same watershed, including Lake Trente et un Milles, from which it originated.
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Oest, Adam, Ali Alsaffar, Mitchell Fenner, Dominic Azzopardi, and Sonia M. Tiquia-Arashiro. "Patterns of Change in Metabolic Capabilities of Sediment Microbial Communities in River and Lake Ecosystems." International Journal of Microbiology 2018 (May 27, 2018): 1–15. http://dx.doi.org/10.1155/2018/6234931.

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Information on the biodegradation potential of lake and river microbial communities is essential for watershed management. The water draining into the lake ecosystems often carries a significant amount of suspended sediments, which are transported by rivers and streams from the local drainage basin. The organic carbon processing in the sediments is executed by heterotrophic microbial communities, whose activities may vary spatially and temporally. Thus, to capture and apprehend some of these variabilities in the sediments, we sampled six sites: three from the Saint Clair River (SC1, SC2, and SC3) and three from Lake Saint Clair in the spring, summer, fall, and winter of 2016. Here, we investigated the shifts in metabolic profiles of sediment microbial communities, along Saint Clair River and Lake Saint Clair using Biolog EcoPlates, which test for the oxidation of 31 carbon sources. The number of utilized substrates was generally higher in the river sediments (upstream) than in the lake sediments (downstream), suggesting a shift in metabolic activities among microbial assemblages. Seasonal and site-specific differences were also found in the numbers of utilized substrates, which were similar in the summer and fall, and spring and winter. The sediment microbial communities in the summer and fall showed more versatile substrate utilization patterns than spring and winter communities. The functional fingerprint analyses clearly distinguish the sediment microbial communities from the lake sites (downstream more polluted sites), which showed a potential capacity to use more complex carbon substrates such as polymers. This study establishes a close linkage between physical and chemical properties (temperature and organic matter content) of lake and river sediments and associated microbial functional activities.
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Cruaud, Perrine, Adrien Vigneron, Caetano C. Dorea, Manuel J. Rodriguez, and Steve J. Charette. "Rapid Changes in Microbial Community Structures along a Meandering River." Microorganisms 8, no. 11 (October 22, 2020): 1631. http://dx.doi.org/10.3390/microorganisms8111631.

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Streams and rivers convey freshwater from lands to the oceans, transporting various organic particles, minerals, and living organisms. Microbial communities are key components of freshwater food webs and take up, utilize, and transform this material. However, there are still important gaps in our understanding of the dynamic of these organisms along the river channels. Using high-throughput 16S and 18S rRNA gene sequencing and quantitative PCR on a 11-km long transect of the Saint-Charles River (Quebec, CA), starting from its main source, the Saint-Charles Lake, we show that bacterial and protist community structures in the river drifted quickly but progressively downstream of its source. The dominant Operational Taxonomic Units (OTUs) of the lake, notably related to Cyanobacteria, decreased in proportions, whereas relative proportions of other OTUs, such as a Pseudarcicella OTU, increased along the river course, becoming quickly predominant in the river system. Both prokaryotic and protist communities changed along the river transect, suggesting a strong impact of the shift from a stratified lake ecosystem to a continuously mixed river environment. This might reflect the cumulative effects of the increasing water turbulence, fluctuations of physicochemical conditions, differential predation pressure in the river, especially in the lake outlet by benthic filter feeders, or the relocation of microorganisms, through flocculation, sedimentation, resuspension, or inoculation from the watershed. Our study reveals that the transit of water in a river system can greatly impact both bacterial and micro-eukaryotic community composition, even over a short distance, and, potentially, the transformation of materials in the water column.
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Dugdale, Stephen J., André St-Hilaire, and R. Allen Curry. "Automating drainage direction and physiographic inputs to the CEQUEAU hydrological model: sensitivity testing on the lower Saint John River watershed, Canada." Journal of Hydroinformatics 19, no. 3 (January 3, 2017): 469–92. http://dx.doi.org/10.2166/hydro.2017.051.

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CEQUEAU is a process-based hydrological model capable of simulating river flows and temperatures. Despite an active user base, no facility yet exists for the automatic assembly and input of watershed data required for flow simulations. CEQUEAU can therefore be time-consuming to implement, particularly on large (≥104 km2) watersheds. We detail a new MATLAB toolbox designed to remove this key limitation by automatically computing CEQUEAU's key drainage direction and physiographic inputs from geographic information system (GIS) data. With the toolbox, model implementation can now be achieved extremely quickly (<1.5 hr) given suitable inputs. This time saving enabled us to assess CEQUEAU's sensitivity to changes in grid size by implementing the model on a large (14,990 km2) watershed at successively decreasing resolution (2.5 km to 112 km), using a fixed calibration parameter set. Results of this analysis showed that despite some model strength fluctuations linked to variability in computed basin size/land-use, only a minor decrease in model strength (mean Nash–Sutcliffe efficiency (NSE) reduction = 0.03) was observed at relatively fine resolutions (2.5 km to 20 km). Although results might change if the model was recalibrated at each resolution step, findings indicate that CEQUEAU is able to provide realistic flow simulations at a wide range of resolutions.
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Kabir, M. A., D. Dutta, and S. Hironaka. "Process-based distributed modeling approach for analysis of sediment dynamics in a river basin." Hydrology and Earth System Sciences 15, no. 4 (April 27, 2011): 1307–21. http://dx.doi.org/10.5194/hess-15-1307-2011.

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Abstract. Modeling of sediment dynamics for developing best management practices of reducing soil erosion and of sediment control has become essential for sustainable management of watersheds. Precise estimation of sediment dynamics is very important since soils are a major component of enormous environmental processes and sediment transport controls lake and river pollution extensively. Different hydrological processes govern sediment dynamics in a river basin, which are highly variable in spatial and temporal scales. This paper presents a process-based distributed modeling approach for analysis of sediment dynamics at river basin scale by integrating sediment processes (soil erosion, sediment transport and deposition) with an existing process-based distributed hydrological model. In this modeling approach, the watershed is divided into an array of homogeneous grids to capture the catchment spatial heterogeneity. Hillslope and river sediment dynamic processes have been modeled separately and linked to each other consistently. Water flow and sediment transport at different land grids and river nodes are modeled using one dimensional kinematic wave approximation of Saint-Venant equations. The mechanics of sediment dynamics are integrated into the model using representative physical equations after a comprehensive review. The model has been tested on river basins in two different hydro climatic areas, the Abukuma River Basin, Japan and Latrobe River Basin, Australia. Sediment transport and deposition are modeled using Govers transport capacity equation. All spatial datasets, such as, Digital Elevation Model (DEM), land use and soil classification data, etc., have been prepared using raster "Geographic Information System (GIS)" tools. The results of relevant statistical checks (Nash-Sutcliffe efficiency and R–squared value) indicate that the model simulates basin hydrology and its associated sediment dynamics reasonably well. This paper presents the model including descriptions of the various components and the results of its application on two case study areas.
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Kabir, M. A., D. Dutta, and S. Hironaka. "Process-based distributed modeling approach for analysis of sediment dynamics in a river basin." Hydrology and Earth System Sciences Discussions 7, no. 4 (August 16, 2010): 5685–735. http://dx.doi.org/10.5194/hessd-7-5685-2010.

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Abstract. Modeling of sediment dynamics for developing best management practices of reducing soil erosion and of sediment control has become essential for sustainable management of watersheds. Precise estimation of sediment dynamics is very important since soils are a major component of enormous environmental processes and sediment transport controls lake and river pollution extensively. Different hydrological processes govern sediment dynamics in a river basin, which are highly variable in spatial and temporal scales. This paper presents a process-based distributed modeling approach for analysis of sediment dynamics at river basin scale by integrating sediment processes (soil erosion, sediment transport and deposition) with an existing process-based distributed hydrological model. In this modeling approach, the watershed is divided into an array of homogeneous grids to capture the catchment spatial heterogeneity. Hillslope and river sediment dynamic processes have been modeled separately and linked to each other consistently. Water flow and sediment transport at different surface grids and river nodes are modeled using one-dimensional kinematic wave approximation of Saint-Venant equations. The mechanics of sediment dynamics are integrated into the model using representative physical equations after a comprehensive review. The model has been tested on river basins in two different hydro climatic areas, the Abukuma River Basin, Japan and Latrobe River Basin, Australia. Sediment transport and deposition are modeled using Govers transport capacity equation. All spatial datasets, such as, Digital Elevation Model (DEM), land use and soil classification data, etc., have been prepared using raster "Geographic Information System (GIS)" tools. The results of relevant statistical checks (Nash-Sutcliffe efficiency and R-squared value) indicate that the model simulates basin hydrology and its associated sediment dynamics reasonably well. This paper presents the model including descriptions of the various components and the results of its application on case study areas.
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Clet, Martine, and Serge Occhietti. "Palynologie et paléoenvironnements des épisodes du Sable de Lotbinière et des Varves de Deschaillons (Pléistocène supérieur) de la vallée du Saint-Laurent." Canadian Journal of Earth Sciences 31, no. 9 (September 1, 1994): 1474–85. http://dx.doi.org/10.1139/e94-130.

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Lotbinière Sand and Deschaillons Varves are indicators of the drainage pattern of the St. Lawrence watershed, which presumably occurred during the Late Sangamonian (5c and 5c–5b transition?). The pollen content of the Lotbinière Sand suggests there was a Picea mariana – Betula – Pinus boreal forest in the valley. In the lowermost zone of the Deschaillons Varves, the pollen is very abundant: the boreal forest was progressively flooded by Lake Deschaillons. Above this zone, the vegetation seems to evolve toward a Picea and Betula open forest. The pollen of the upper contorted varves was presumably reworked from older material or transported from remote sources. The following paleoenvironmental sequence is reconstructed in the St. Lawrence Valley: (i) lowering of the relative drainage level, as indicated by the erosional disconformity in lower rythmites; this phase, of unknown duration, is ascribed to an eustatic lowering related to a global climatic cooling; (ii) an aggradation phase, as indicated by the Lotbinière Sand, before and at the beginning of a glacial damming in the middle estuary; (iii) progressive flooding of the valley and its boreal forest as ice caps are present on adjacent Laurentian and Appalachian highlands; (iv) expansion of Lake Deschaillons, limited by the Glens Falls sill, New York. The relative elevation of the lake was at least 56 m. Great Lakes and upper St. Lawrence River drainage system was probably deflected to the Hudson River. According to the number of varves, the regional ice caps preceded the general invasion by Laurentide Ice Sheet of approximatively 3800 years.
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Dissertations / Theses on the topic "Saint Esprit River Watershed"

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Romero, David R. "Hydrologic modelling on the Saint Esprit watershed." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ64442.pdf.

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Nur, Ali A. "The study of extractable and soluble phosphorus on an agricultural watershed in Quebec." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0023/MQ50846.pdf.

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Dissart, Jean-Christophe. "The economics of erosion and sustainable practices : the case of the Saint-Esprit watershed." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0006/MQ44158.pdf.

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MacLeod, Andrew Harris. "Characterization of Sediment Yield Variation, Little Colorado River Basin Near Saint Johns Arizona." Thesis, The University of Arizona, 2001. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_2001_222_sip1_w.pdf&type=application/pdf.

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De, Souza Wendy P. "Empirical relationships between water quality and catchment characteristics in southern Quebec." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55440.

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An empirical study was undertaken in the basin of the Saint-Francois River, southern Quebec, to determine whether surface water quality could be predicted from watershed parameters. Five water quality variables--nitrate (NO$ sb3$), dissolved, particulate and total phosphorus (DP, PP and TP respectively) and dissolved organic carbon (DOC)--were statistically associated with physiographical and landuse/cover parameters.
Using water quality data collected by MENVIQ from 26 large (26 km$ sp2$-9436 km$ sp2$), forested and agricultural watersheds in summers 1988-91, median concentrations of NO$ sb3$, DP, PP, TP and DOC were found to be significantly correlated with several watershed parameters. Linear regression analyses and scatter plots however, showed little evidence of predictive relationships, owing primarily to gaps in data ranges, influence points and outliers.
Sampling of 24 small headwater catchments (0.3 km$ sp2$-9.5 km$ sp2$) in late summer 1992, 16 of which having no upstream sampling, revealed that median DOC concentration was correlated with both forest cover and agricultural land. No significant correlations were found between the median concentrations of NO$ sb3$, DP, PP and TP and any of the catchment parameters. Linear regression analyses and scatter plots of the DOC relationships with forest cover, then agricultural land were performed but were not found to be suitable for prediction.
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Forrest, Margaret Anne. "Stewardship as partnership : a comparative study of positive human-environment relationships in East Cree and suburban Montreal communities." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99590.

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This study suggests that cultural acknowledgement of the integral partnership between a human community and the environment it inhabits is central to the development of positive human-environment relationships. The comparison of two community environmental projects illustrates cultural implications of human land occupancy through comparisons of their governing land use institutions as well as social and individual experiences. In the Paakumshumwaau-Wemindji project environmental responsibility is strongly motivated by the interaction of shared cosmological understandings with direct experience in the landscape. The creation of Edgewater Park in suburban Pointe Claire is a clear indication of community environmental responsibility working its way towards new partnerships with lakeshore ecological communities. The fundamental difference in these partnerships inheres however in the distinct ways the two human communities understand the voice of the non-human elements within the partnership.
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Book chapters on the topic "Saint Esprit River Watershed"

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Leclerc, Marie-Claude, and Michel Grégoire. "Implementing integrated watershed management in Quebec: examples from the Saint John River Watershed Organization." In Integrated Water Management in Canada, 142–59. Routledge, 2018. http://dx.doi.org/10.4324/9780429504181-11.

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"Advancing an Ecosystem Approach in the Gulf of Maine." In Advancing an Ecosystem Approach in the Gulf of Maine, edited by Glenn Benoy, Eric Luiker, and Joseph Culp. American Fisheries Society, 2012. http://dx.doi.org/10.47886/9781934874301.ch16.

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Abstract.—Estuarine and coastal ecosystems of the Gulf of Maine continue to be degraded by excessive loadings of sediments, nutrients, and contaminants derived from surrounding watersheds. The Saint John River basin is the largest basin in the Gulf of Maine, and within it there are a significant number of major industries along the main stem of the river and vast expanses of land-based activities of forestry and potato production along many of the river valleys and floodplains. Water quality and loading of sediments and nutrients have changed over the past few hundred years, with the most important changes coming with the expansion of agriculture and pulp and paper processing operations since the 1950s. Several studies are discussed in this chapter that outline the identification and quantification of watershed-based activities that influence the Saint John River ecosystem. Using export coefficient modeling, nonpoint sources of nitrogen and phosphorus to the Bay of Fundy are shown to be three to four times that of point sources. Few studies explicitly couple river dynamics to estimates of load to the Saint John River estuary and the Bay of Fundy. With high-quality geographic information on land coverage, land usage and human activities, and robust water quantity and quality monitoring programs, analytical models can be developed to help evaluate policy options and chart pathways towards a more integrated understanding and management of the basin and its receiving waters.
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"Muskellunge Management: Fifty Years of Cooperation Among Anglers, Scientists, and Fisheries Biologists." In Muskellunge Management: Fifty Years of Cooperation Among Anglers, Scientists, and Fisheries Biologists, edited by Steven J. Kerr and Brandon Jones. American Fisheries Society, 2017. http://dx.doi.org/10.47886/9781934874462.ch4.

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<em>Abstract</em>.—We report on results of a Muskellunge <em>Esox masquinongy </em>tagging project, which was conducted on the Saint John River, New Brunswick, from 2006 to 2015 (inclusive). During that period of time, 691 Muskellunge were angled, tagged, and released by members of the Saint John River Chapter of Muskies Canada Inc. By the end of the 2015 angling season, a total of 64 (9.3%) tagged Muskellunge had been recaptured by angling. An additional four tagged fish were captured at the Mactaquac Dam fishway. Most Muskellunge were observed to establish discrete summer home ranges from which there was little, if any, movement. Transitional movements were believed to occur during the spring and fall, associated with spawning as well as the establishment of summer and winter ranges. Muskellunge movements that were documented in this study occurred in both upstream and downstream directions in equal proportion. Muskellunge also demonstrated the ability to move long distances both upstream and downstream, including passage over/through the Mactaquac Dam. Observations of Muskellunge behavior and movements from this study are generally consistent with observations (small home ranges, males more sedentary than females, movements seasonal in nature, capable of long distance movements, etc.) reported from similar tagging studies in other North American jurisdictions. Future efforts will be directed to obtaining additional information on recaptured fish. With additional recapture information, a more detailed analysis of Muskellunge in the Saint John watershed can be completed.
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"Anadromous Sturgeons: Habitats, Threats, and Management." In Anadromous Sturgeons: Habitats, Threats, and Management, edited by Nathaniel Corey Oakley and Joseph E. Hightower. American Fisheries Society, 2007. http://dx.doi.org/10.47886/9781888569919.ch15.

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Abstract. – Shortnose sturgeon <em>Acipenser brevirostrum</em> historically occurred in most major Atlantic Coast rivers from Saint Johns River, New Brunswick, Canada to St. John’s River, Florida. However, there are few records of shortnose sturgeon occurrences within North Carolina and none from the Neuse River. We conducted a 2-year intensive gill-net survey, following the National Marine Fisheries Service sampling protocol, and a reward program in order to determine their population status within the Neuse River. No shortnose sturgeon were observed, although 10 juvenile Atlantic sturgeon (506–992 mm fork length) were encountered. Habitat surveys of the lower Neuse River, where shortnose sturgeon would be expected to occur during summer, showed that bottom waters were severely hypoxic during June–September of 2001–2002. A juvenile Atlantic sturgeon tagged with an ultrasonic transmitter moved upstream of the unsuitable summer habitat and remained in a restricted area until late fall, when water quality improved due to increased flows and lower temperatures. We developed logistic regression models of watershed and river characteristics based on 36 Atlantic Coast rivers with a known presence or absence of shortnose sturgeon. Model predictions suggest that the Neuse River should contain a population of shortnose sturgeon based on the amount of physical habitat. We hypothesize that shortnose sturgeon have been extirpated from the Neuse River due to a lack of suitable summer habitat. Population recovery may be impossible until habitat quality can be improved.
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