Recruitment and Overwinter Habitat Use of Juvenile Gulf Sturgeon in the Apalachicola River, Forida PDF Download
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Author: Nathaniel Quinn Hancock
Publisher:
ISBN:
Category :
Languages : en
Pages : 160
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Book Description
Recruitment and overwinter habitat use of juvenile gulf sturgeon in the Apalachicola River, Florida
Author: Nathaniel Quinn Hancock
Publisher:
ISBN:
Category :
Languages : en
Pages : 160
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Book Description
Recruitment and overwinter habitat use of juvenile gulf sturgeon in the Apalachicola River, Florida
Author: Katherine Marie Fleming
Publisher:
ISBN:
Category : Gulf sturgeon
Languages : en
Pages : 91
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Book Description
Author: Adam Gregory Fox
Publisher:
ISBN:
Category :
Languages : en
Pages : 266
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Book Description
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.
Author: H. Jared Flowers
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
ABSTRACT: Gulf sturgeon Acipenser oxyrinchus desotoi is a U.S. federally threatened species found throughout the northern Gulf of Mexico. The viability of the Apalachicola River, Florida Gulf sturgeon population is a concern to fishery managers because of the small population size, slow rate of population recovery, and numerous threats to recovery, including habitat loss and interstate water allocation battles. Although Gulf sturgeon harvest has been illegal since 1985, managers and researchers are concerned that the population is not recovering at the desired rate to meet the recovery criteria objective of delisting by 2023.
Author: Page Elizabeth Vick
Publisher:
ISBN:
Category : Anadromous fishes
Languages : en
Pages : 96
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Book Description
Critical spawning and feeding habitat was designated for federally threatened, anadromous Gulf Sturgeon (GS) to aid in population recovery. This study examined GS occupancy, habitat use, and movement through critical habitat monitored by the Ship Island (SI) acoustic array during overwintering periods from 2011 to 2015, prior to MsCIP SI restoration. An occupancy index analyzed patterns of spatial and temporal habitat use of both western and eastern population segments (WPS and EPS, respectively) of GS on the SI array. The ends of SI along with the passes and cuts of the island, especially Dog Keys Pass (DKP), were occupied by GS. Further, the index was determined to be strong and robust as it was able to adapt as the array expanded. There was no significant difference in mean active days of population segments of GS on the SI array, and both population segments were concentrated within DKP and nearshore Western Horn Island. Travel rate (km d[-1]) to the SI array from natal drainages was observed, and population segments differed significantly with EPS individuals traveling at a higher rate, on average, compared to WPS individuals; Blackwater fish had a significantly higher travel rate compared to Pascagoula fish. Clearly, both population segments use areas associated with the SI array as critical habitat during the overwintering period, regardless of the distance traveled from natal rivers. Gulf Sturgeon use multiple marine and freshwater habitats throughout their lifetime; critical habitat should be protected and expanded to possibly assist in population recovery for this species. --Page ii.
Author: Stephen T. Ross
Publisher:
ISBN:
Category : Fish tagging
Languages : en
Pages : 5
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Book Description
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9789251046944
Category : Business & Economics
Languages : en
Pages : 180
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Book Description
The importance of free longitudinal passage of river fauna is stressed.
Author: Mathias Jungwirth
Publisher: Wiley
ISBN: 9780852382530
Category : Technology & Engineering
Languages : en
Pages : 448
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Book Description
International Conference on Fish Migration and Bypass Channels held in Vienna in September 1996. It covers the range of fish pass technologies currently in use throughout the world and attempts to develop a wider, more ecological perspective on this formerly engineering-orientated discipline. Emphasis is placed on enhancing an understanding of fish migration behaviour, and achieving optimum design to meet the behavioural requirements of all known migratory species. Additional attention is paid to comparing the European trend towards constructing nature-like bypass channels with the highly technical solutions dominant in North America.
Author: Samuel Frederick Hildebrand
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 496
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Book Description
Author: R. Orsato
Publisher: Springer
ISBN: 0230236855
Category : Business & Economics
Languages : en
Pages : 265
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Book Description
By analysing the rationales for sustainability strategies, this book addresses a timely question for managers, academics and MBAs: 'when does it pay to be green?' Based on solid theoretical foundations and empirical research, it clarifies the elements involved in the formation and evaluation of sustainability strategies in firms.
