Download or read book Assessment of Critical Habitats for Recovering the Chesapeake Bay Atlantic Sturgeon Distinct Population Segment written by Bob Greenlee and published by . This book was released on 2017 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The states of Virginia and Maryland along with Virginia Commonwealth University (VCU), Virginia Institute of Marine Science (VIMS) and University of Maryland Center for Environmental Science (UMCES) partnered to assess critical habitat for recovering the Chesapeake Bay Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) distinct population segment. The primary objectives were to assess reproductive habitat in the James River, nursery habitat in the James and York Rivers and the degree of dependence of those populations to habitat in the Chesapeake Bay.

Download or read book Endangered and Threatened Wildlife and Plants Threatened and Endangered Status for Distinct Population Segments of Atlantic Sturgeon Us National Oceanic and Atmospheric Administration Regulation Noaa 2018 Edition written by The Law Library and published by Independently Published. This book was released on 2019-01-04 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Law Library presents the complete text of the Endangered and Threatened Wildlife and Plants - Threatened and Endangered Status for Distinct Population Segments of Atlantic Sturgeon (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition). Updated as of May 29, 2018 We, NMFS, are issuing a final determination to list the Gulf of Maine (GOM) Distinct Population Segment (DPS) of Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) as a threatened species under the Endangered Species Act (ESA), and the New York Bight (NYB) and Chesapeake Bay (CB) DPSs of Atlantic sturgeon as endangered species under the ESA. We have proposed protective regulations for the GOM DPS in accordance with ESA section 4(d) in a separate rulemaking published in the Federal Register on June 10, 2011. We are currently considering the available information in order to designate critical habitat. With this rule, we are also soliciting information that may be relevant to the designation of critical habitat for all three DPSs in the Northeast Region. Details of our analyses, their outcome, and a request for public comment on our proposed critical habitat designations will be published in subsequent Federal Register documents. This ebook contains: - The complete text of the Endangered and Threatened Wildlife and Plants - Threatened and Endangered Status for Distinct Population Segments of Atlantic Sturgeon (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition) - A dynamic table of content linking to each section - A table of contents in introduction presenting a general overview of the structure

Download or read book An Atlantic Sturgeon Population Index for ESA Management Analysis written by John Kocik and published by . This book was released on 2013 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The listing in 2012 of Atlantic sturgeon (Acipenser oxyrinchus) under the Endangered Species Act identified four Distinct Population Segments (DPSs) as endangered and one as threatened. We developed an index of population abundance for Atlantic sturgeon in the Northeast to aid managers to evaluate potential threats to these stocks. The index uses fishery bycatch estimates, data from the USFWS Atlantic Coast Sturgeon Tagging Database, and published values of Atlantic sturgeon life history parameters. Estimates of total Atlantic sturgeon bycatch were derived from data collected on observed commercial fishing trips monitored by the Northeast Fisheries Observer Program (NEFOP). We evaluated uncertainty in the index input data with a risk analysis model that used a parametric bootstrapping approach. Based on our index, the mean abundance of Atlantic sturgeon in oceanic waters off the Northeast coast of the US during 2006-2011 was 417,934 fish, with a 95% confidence interval of 165,381 to 744,597 fish. This estimate does not include Atlantic sturgeon that may reside year-round in rivers and estuaries. Our abundance estimates are consistent with annual swept area abundance estimates of Atlantic sturgeon in nearshore areas derived from Northeast Area Monitoring and Assessment Program surveys conducted during 2007-2012"--Abstract.

Download or read book Habitat Utilization of Atlantic Sturgeon Acipenser Oxyrinchus Oxyrinchus in the Delaware River Bay and Coastal Atlantic Ocean written by Matthew W. Breece and published by . This book was released on 2017 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Animals utilize various environments throughout their life cycle to optimize growth, fitness, and survival. These environments are their habitats. As the lifecycle of an organism progresses, the resources needed, and thus the habitats preferred will change to fulfill the new requirements of the given life history stage. Resource needs for many organisms will also vary seasonally in both composition and specificity requiring organisms to shift their habitats to fulfill changing needs throughout the year. Incorporating species occurrence observations and environmental properties enables species distribution models to reliably estimate habitat locations. Destruction of habitat and overfishing beginning in the late 19th century severely depleted Atlantic Sturgeon populations. Subsequent to the boom and bust period of exploitation, there has been minimal fishing pressure and improving habitats. However, lack of recovery led to the 2012 listing of Atlantic Sturgeon under the Endangered Species Act. In this dissertation I utilize various sources of environmental data, species distribution modeling, and acoustic biotelemetry to gain insight into the occurrence and habitat use of adult Atlantic Sturgeon to further their protection and promote efficient resource management. ☐ To estimate adult Atlantic sturgeon spatial distributions during riverine occupancy in the Delaware River, I utilized a maximum entropy approach along with passive biotelemetry during the likely spawning season. I found that substrate composition and distance from the salt front significantly influenced the locations of adult Atlantic Sturgeon in the Delaware River. The movement of the salt front upstream as a result of dredging and climate change likely eliminated historic spawning habitats and currently threatens areas where Atlantic Sturgeon spawning may still be taking place. ☐ In the Delaware Bay I found that movement and residency patterns were driven primarily by depth, bottom temperature, and location. These findings revealed that as temperatures warm in the summer Atlantic Sturgeon maintain residency in deep areas near the mouth of the Delaware Bay where upwelling offshore waters keep bottom temperatures cooler than surrounding area. As water temperatures begin to cool in the fall this pattern of residency turns back into movement. ☐ By placing Atlantic Sturgeon in the context of dynamic, objective, and globally conservative seascapes, in a manner similar to landscape partitioning in the terrestrial environment, I was able to link Atlantic Sturgeon occurrence to one particular seascape associated with terrigenous input during their spring migration. To verify the seascape findings from the passive acoustic array I deployed an autonomous underwater vehicle to dynamically sample the seascape distribution in the coastal ocean to confirm the original hypothesis of selection for a given seascape. ☐ To expand the prediction of Atlantic Sturgeon occurrence for the entire seasonal cycle I matched fisheries independent biotelemetry observations of Atlantic Sturgeon with daily satellite observations to construct a time resolved spatial distribution model of Atlantic Sturgeon. I determined that depth, day-of-year, sea surface temperature, and light absorption by seawater are the most important predictors of Atlantic sturgeon occurrence. I found strong spatial differences in spring and fall migration patterns, when anthropogenic interactions peak. Cross-validated models correctly identified > 88% of biotelemetry observations in this study region and my models also correctly identified ~67% of fisheries dependent observations throughout the year. However, during their migrations, when harmful interactions were highest, models correctly identified ~91% of fisheries dependent observations. ☐ The Delaware Bay and River once supported the largest population of sturgeon in North America but due to anthropogenic impacts this population segment is severely depleted. Recent measures have aided to stabilize Atlantic Sturgeon populations but without further protection for habitats, such as those highlighted by this dissertation, recovery may never be realized. I strongly suggest that the dynamic models created in this body of work be used for guidance to managers and stakeholders to reduce interactions with this highly imperiled species thereby enhancing conservation and recovery efforts.

Download or read book Endangered and Threatened Wildlife and Plants Final Listing Determinations for Two Distinct Population Segments of Atlantic Sturgeon Us National Oceanic and Atmospheric Administration Regulation Noaa 2018 Edition written by The Law Library and published by Independently Published. This book was released on 2019 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Law Library presents the complete text of the Endangered and Threatened Wildlife and Plants - Final Listing Determinations for Two Distinct Population Segments of Atlantic Sturgeon (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition). Updated as of May 29, 2018 We, NMFS, issue a final determination to list the Carolina and South Atlantic distinct population segments (DPSs) of Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) as endangered under the Endangered Species Act (ESA) of 1973, as amended. We have reviewed the status of the species and conservation efforts being made to protect the species, considered public and peer review comments, and we have made our determination that the Carolina and South Atlantic DPSs are in danger of extinction throughout their ranges, and should be listed as endangered, based on the best available scientific and commercial data. This ebook contains: - The complete text of the Endangered and Threatened Wildlife and Plants - Final Listing Determinations for Two Distinct Population Segments of Atlantic Sturgeon (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition) - A dynamic table of content linking to each section - A table of contents in introduction presenting a general overview of the structure

Download or read book Atlantic Coast Ecological Inventory User s Guide and Information Base written by and published by . This book was released on 1980 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Endangered and Threatened Wildlife and Plants Threatened Status for Southern Distinct Population Segment of North American Green Sturgeon Us National Oceanic and Atmospheric Administration Regulation Noaa 2018 Edition written by The Law Library and published by Independently Published. This book was released on 2019-01-06 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Law Library presents the complete text of the Endangered and Threatened Wildlife and Plants - Threatened Status for Southern Distinct Population Segment of North American Green Sturgeon (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition). Updated as of May 29, 2018 Following completion of a comprehensive Endangered Species Act (ESA) Status Review and Update for the North American green sturgeon (Acipenser medirostris; hereafter, "green sturgeon"), we, NOAA's National Marine Fisheries Service (NMFS), published a Proposed Rule to list the Southern distinct population segment (DPS) of green sturgeon as threatened on April 6, 2005. After considering public comments on the Proposed Rule, we are issuing a Final Rule to list the Southern DPS as a threatened species. NMFS is currently considering issuance of protective regulations that may be necessary and advisable to provide for the conservation of the species. With this document we are also soliciting information that may be relevant to our analysis of protective regulations and to the designation of critical habitat for the Southern DPS of green sturgeon. Details of our analyses, their outcome, and a request for public comment on our proposals will be published in subsequent Federal Register notices. This ebook contains: - The complete text of the Endangered and Threatened Wildlife and Plants - Threatened Status for Southern Distinct Population Segment of North American Green Sturgeon (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition) - A dynamic table of content linking to each section - A table of contents in introduction presenting a general overview of the structure

Download or read book Atlantic Sturgeon Acipenser Oxyrinchus Oxyrinchus in the New York Bight DPS Identification of Critical Habitat and Rates of Interbasin Exchange written by Dewayne Allen Fox and published by . This book was released on 2010 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Essential Fish Habitat of Atlantic Sturgeon Acipenser Oxyrinchus in the Southern Chesapeake Bay written by John A. Musick and published by . This book was released on 2005 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Critical Habitats of Atlantic Sturgeon written by Marine Resources Research Institute (S.C.) and published by . This book was released on 1999 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Assessment written by and published by . This book was released on 2010 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The current EA analyzed the effects of the proposed Atlantic sturgeon research, which will be conducted in nearshore areas in Delaware, New York, New Jersey, Connecticut, and Maine. Specifically, the funded work would be used to: delineate timing of movements, residence periods of Atlantic sturgeon within aggregations, and exchange from multiple known aggregation areas; identify fine-scale spatial and temporal movement patterns within aggregation areas; estimate the relative contributions of different Atlantic sturgeon breeding areas to these aggregations; and assess and evaluate management alternatives by estimating population proportions that would be protected under a number of spatial and temporal closure scenarios. The proposed action analyzed in the EA would not have significant environmental effects on the target or non-target species; public health and safety would not affected; no unique geographic area would be affected; and the effects of this study would not be highly uncertain, nor would they involve unique or unknown risks. Issuance of this award would not set a precedent for future actions with significant effects, nor would it represent a decision in principle about a future consideration. There would not be individually insignificant but cumulatively significant impacts associated with the proposed action, and there would not be adverse effects on historic resources. The award would contain mitigating measures to avoid unnecessary stress to the subject animals"--Cover letter.

Download or read book Bioenergetics Modeling and Assessment of Suitable Habitat for Juvenile Atlantic and Shortnose Sturgeons Acipenser Oxyrinchus and A Brevirostrum in the Chesapeake Bay written by Edwin Juan Niklitschek and published by . This book was released on 2001 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Life History Analysis of James River Atlantic Sturgeon Acipenser Oxyrinchus Oxyrinchus with Implications for Management and Recovery of the Species written by Matthew Thomas Balazik and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Sturgeon species (family Acipenseridae) are threatened globally due to habitat destruction, pollution, and overfishing. The Atlantic sturgeon Acipenser oxyrinchus oxyrinchus was listed as a federally endangered species in 2012. Atlantic sturgeon have a complex life history that utilizes a wide range of habitats. Timing of life history varies in different areas requiring each population to be studied. Very little work has been published on Atlantic sturgeon reproduction in the James River, Virginia. To aid the recovery of James River Atlantic sturgeon, aspects of life history need to be addressed. To increase understanding of Atlantic sturgeon life history a length at age model was created to show population structure and age of sexual maturity. Telemetry experiments were conducted to determine what types of boats are likely to cause boat strike mortalities of adult fish during a spawning season. Morphometrics, sperm characteristics, and telemetry data were used to determine if Atlantic sturgeon have a fall spawning season. Strontium/calcium ratio analysis was conducted on Atlantic sturgeon fin spines to better understand migration patterns. Cortisol levels were examined in Atlantic sturgeon exposed to M.S.222, electronarcosis or no anesthetic 1 and 24 hr after a small incision mimicking tag implantation. I also determined the feasibility of using electronarcosis in the field and the effect of salinity on electronarcosis. The length at age data show male Atlantic sturgeon beco, e sexually mature at age 10 y and females around age 15 y. Telemetry data showed that deep draft ocean-cargo ships are most likely responsible for boat strike mortalities and there is a greater chance of Atlantic sturgeon being hit in the narrow portion of the river. Electronarcosis is an effective anesthetic and has various attributes that make it better suited for field applications then frequently used chemical anesthetics. The data generated from this research will help management produce effective recovery plans and create a safer research environment for both the fish and researcher.

Download or read book Status of Atlantic Sturgeon in Maryland s Chesapeake Bay written by Harley Speir and published by . This book was released on 1996 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seasonal Occurrence and Movements of Atlantic Sturgeon acipenser Oxyrinchus Oxyrinchus in Georgia and Florida written by Adam Gregory Fox and published by . This book was released on 2018 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Atlantic Sturgeon (Acipenser oxyrinchus oxyrinchus) is a federally endangered anadromous fish that historically occurred along the Atlantic coast of North American from Canada to Florida. Through the 20th century, overharvest and dam construction resulted in range-wide population declines. Despite two decades of federal protection, many populations have not recovered, and information about the status of many populations is lacking, especially in the Southeastern United States. Recruitment may be a bottleneck for recovery, but habitat use by early juveniles is not well understood. The objectives of this study were to 1) assess the status of Atlantic Sturgeon populations in the St. Johns River in Florida and the St. Marys River in Georgia, at the southern margin of the species' range, and 2) describe seasonal movement by juvenile Atlantic Sturgeon in the Ogeechee, Altamaha, and Satilla Rivers in Georgia. Sturgeon were captured using monofilament gill and trammel nets, and some individuals were tagged with surgically-implanted acoustic transmitters. Fish movements were monitored using an array of passive acoustic receivers distributed throughout the lower river and estuary of each system. We found no evidence of an extant population of Atlantic Sturgeon within the St. Johns River system, but did document the presence of young juveniles in the St. Marys River. Those fish represent a small, but genetically distinct population in a river where the species had previously been thought extirpated. Our results also indicated that both rivers continue to provide seasonally important habitat for migrating adults from other populations. Tagged age-1 river-resident juvenile sturgeon in the Ogeechee, Altamaha, and Satilla Rivers exhibited similar patterns of seasonal habitat use 0́3 during the summer, fish were concentrated in upriver portions of nursery habitat, but during the winter they dispersed downriver and used more polyhaline habitat. Also during the winter of age-2, at least 30% of tagged fish outmigrated from their natal river. These results provide important information for management agencies regarding the status of Atlantic Sturgeon in the two southernmost rivers in their range, as well as helping to fill knowledge gaps about juvenile habitat use and outmigration.

Download or read book Endangered and Threatened Species Critical Habitat for the Endangered Distinct Population Segment of Smalltooth Sawfish Us National Oceanic and Atm written by The Law Library and published by Independently Published. This book was released on 2019 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Law Library presents the complete text of the Endangered and Threatened Species - Critical Habitat for the Endangered Distinct Population Segment of Smalltooth Sawfish (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition). Updated as of May 29, 2018 We, the National Marine Fisheries Service (NMFS), issue a final rule to designate critical habitat for the U.S. distinct population segment (DPS) of smalltooth sawfish (Pristis pectinata), which was listed as endangered on April 1, 2003, under the Endangered Species Act (ESA). The critical habitat consists of two units: the Charlotte Harbor Estuary Unit, which comprises approximately 221,459 acres of coastal habitat; and the Ten Thousand Islands/Everglades Unit (TTI/E), which comprises approximately 619,013 acres of coastal habitat. The two units are located along the southwestern coast of Florida between Charlotte Harbor and Florida Bay. This ebook contains: - The complete text of the Endangered and Threatened Species - Critical Habitat for the Endangered Distinct Population Segment of Smalltooth Sawfish (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition) - A dynamic table of content linking to each section - A table of contents in introduction presenting a general overview of the structure

Download or read book Biology and Conservation of the European Sturgeon Acipenser sturio L 1758 written by Patrick WILLIOT and published by Springer Science & Business Media. This book was released on 2011-08-24 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book aims at synthesizing our current knowledge of Acipenser sturio and its management. This species, one of the most widespread sturgeon species all over Western Europe ranging from the Black Sea to the Baltic, is now on the verge of extinction. Major aspects of its biology and management, including mismanagement, are provided in a historic perspective. Similarly, the changes in the restoration programs (in situ and ex situ) initiated in France and Germany are presented. As the species occurred in sympatry with Acipenser oxyrinchus in Germany and Poland and very recently in France as well, a brief outlook on restoration-management programs of A. oxyrinchus are also provided for both North America and Northern European countries, namely Germany and Poland. As conservation-restoration actions go beyond scientific issues, non-governmental stakeholders and marine professional fishermen’s organizations have also been asked to contribute, and the key role of a French-German cooperation plan is underlined. A part of the book is devoted to perspectives. Illustrations of the European sturgeon, mainly in photographs, but also in stamps and paintings, are presented.