Download or read book Life History Aspects of the Hickory Shad Alosa Mediocris in the Albemarle Sound Roanoke River Watershed North Carolina written by Christopher F. Batsavage and published by . This book was released on 1997 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fishery Bulletin written by and published by . This book was released on 2014 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Life History Aspects of the Hickory Shad Alosa Mediocris Mitchell in the Neuse River N Carolina written by P. P. Pate (Jr.) and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A History of the Federal Biological Laboratory at Beaufort North Carolina 1899 1999 written by Douglas A. Wolfe and published by . This book was released on 2000 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Calico Scallop Fishery and Sargassum Habitat Fishery written by and published by . This book was released on 1998 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Habitat Plan for the South Atlantic Region Essential Fish Habitat Requirements for Fishery Management Plans of the South Atlantic Fishery Management Council written by and published by . This book was released on 1998 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparing the Hickory Shad Alosa Mediocris and American Shad Alosa Sapidissima Sport Fishery Using Age and Spawning Composition and Social Media written by Samantha Ann Dowiarz and published by . This book was released on 2021 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this study was to compare aspects of Hickory Shad (Alosa mediocris) (Mitchell 1814) and American Shad (Alosa sapidissima) (Wilson 1811) life history while also providing supplemental information on their age and spawning composition, recreational catch and effort, and geographical distribution for future stock assessments. Hickory and American shads are anadromous fish species native to the East Coast of North America that ascend freshwater watersheds to spawn in the spring. Exactly how similar these two species are in life history is unknown, but the two species are co-managed federally by the Atlantic States Marine Fisheries Commission. Based on the 2020 stock assessment, American Shad are in a state of decline in multiple watershed along the spawning range, but it is unknown whether Hickory Shad are experiencing the same decline because the lack of scientific literature makes a benchmark coastwide stock assessment impossible to complete. The first objective of this study was to compare the age and spawning composition of Hickory Shad captured from different river systems along their range. Since aging protocols for Hickory Shad scales and sagittal otoliths were never published in the primary literature, the Massachusetts Division of Marine Fisheries American Shad Ageing Protocol was used in its place. A subsample of transversely sectioned otoliths were aged, coupled with otolith microchemistry, and compared to whole otolith ages. The results determined that Hickory Shad otoliths should be aged slightly differently than American Shad, an aspect of their life history that disagrees with their current co-management. Otoliths were the more precise aging structure, so a sex-specific age-length key for North Carolina was created from 240 Hickory Shad otoliths aged from the Rulifson Lab. The keys were then used to assign ages to length data provided by the North Carolina Wildlife Resources Commission (NCWRC) and North Carolina Division of Marine Fisheries (NCDMF) to create a length-at-age distribution. Fish used in this study were primarily grab samples from agency spring monitoring and so results may not accurately extrapolate to the entire spawning population; however, with the exception of Georgia the results here suggest a latitudinal repeat spawning gradient of increased iteroparity from south to north, a trend also observed for the American Shad. Both species comprise important recreational fisheries throughout their ranges, so much so that a Facebook group named "NC-Shad" was created in 2013 for anglers to post about their fishing trips, successful or otherwise. From 2013-2020, a total of 1,790 posts were analyzed to determine angler demographics, lure characteristics, and catch information. From all posts, 1,398 included location information, so Geographic Information Systems (GIS) was employed to examine spatiotemporal patterns in fishing location and Hickory Shad and American Shad Catch Per Post (CPP). Catch Per Post was used in place of Catch Per Unit Effort (CPUE) because not every post indicated the number of anglers present, so effort could not be assessed based on this data collection method. Although significant spatiotemporal trends were not found based on both Hickory and American shad CPP, an overall positive trend in Hickory Shad CPP and negative trend in American Shad CPP is apparent throughout the study period. These opposing CPP trends suggests that something, whether it is anthropogenic or naturally occurring, is affecting American Shad more drastically than Hickory Shad. The "NC-Shad" CPP was also compared to the CSMA anadromous creel survey CPP obtained annually by the NCWRC, and multiple years within multiple watersheds were found to have significant differences in CPP for both Hickory and American shads. One caveat in this comparison is that creel surveys do not collect information from bank anglers, but many posts from "NC-Shad" were from bank anglers, which may explain some of the CPP differences. This study demonstrated that social media is a technological adaption with potential to form a recreational angler citizen science network based on Local Ecological Knowledge (LEK). Social media data mining could be a cost-effective alternative to obtain supplementary information on recreationally important fish species, and viable technique for the future of fisheries management.
Download or read book The Connecticut River Ecological Study 1965 1973 Revisited written by Paul M. Jacobson and published by . This book was released on 2004 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Aspects of the Life Histories of Hickory Shad Alosa Mediocris Mitchill and Blueback Herring Alosa Aestivalis Mitchill in the Altamaha River Georgia written by Michael Wolff Street and published by . This book was released on 1970 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hickory Shad Alosa Mediocris Population Identification Using Geometric Morphometrics and Otolith Shape written by Steve D. Meyer and published by . This book was released on 2019 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hickory Shad Alosa mediocris is an anadromous species of fish belonging to the Family Clupeidae, first described in 1814 by Samuel L. Mitchill. Little is known about its life history or stock status. It is unknown whether Hickory Shad exhibit natal homing observed in other anadromous species. Fishery management agencies like the North Carolina Wildlife Resources Commission require more information pertaining to Hickory Shad basic life history to better manage the species. To provide information on distribution of stocks of the species, we used a suite of methods including meristics, morphometrics, otolith shape, otolith microchemistry, genetics, and body shape (geometric morphometrics). This thesis covers the body shape and otolith shape analysis. Photographs were taken of 757 Hickory Shad samples from 21 watersheds for body shape analysis. Landmarks were digitized using the software TPSDig2 and differences in body shape were determined by landmark anaylsis using the software MorphoJ. Results of Analysis of Variance (ANOVA) and Discriminant Function Analysis (DFA) determined highly significant differences (p0.0001) in body shape between male and female samples. Principle Components Analysis (PCA) determined that body depth comrised the majority of the variation between sexes. Therefore, all analyses were run on male and female samples separately. DFA and ANOVA detected varying levels of difference from highly significant difference (p
Download or read book Hickory Shad Alosa Mediocris Mitchill Stock Identification Using Morphometric and Meristic Characters written by Jordan Pate Smith and published by . This book was released on 2018 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hickory Shad Alosa mediocris is an anadromous fish species of the family Clupeidae. Little is known about its distribution, life history, and status. Adult Hickory Shad are found seasonally during spring spawning in estuaries and coastal watersheds along the East Coast of the United States from Maryland to Florida, and during late summer as far north as Connecticut. To provide information on stock identification and watershed fidelity the distributional patterns of 17 morphometric and four meristic characteristics of adult Hickory Shad were analyzed from spawning populations along its range. A total of 687 specimens were examined along the latitudinal gradient from the Susquehanna River, Maryland, to the Wekiva River, Florida. Due to low sample sizes (n13) for some rivers as well as missing measurements or counts, some specimens had to be excluded from multivariate analysis. Prior to statistical analysis morphometric characters were corrected for size-dependent variation using an allometric formula. After correction morphometric characters were natural log transformed to better approximate multivariate normality. Correlation analysis on transformed measurements and SL confirmed the results obtained from the allometric method; yet showed fork length and total length were strongly correlated (0.80) and therefore excluded. Multivariate analysis of variance of pooled morphometric and meristic characters showed a significant effect of sex (P 0.05) therefore, all analyses were separated by sex. Analysis of variance showed highly significant difference (P 0.003) for 15 characters between 10 locations for males and 12 characters between 12 locations for females. Non-significant characters were excluded and only significant characters for males and females were used for subsequent analysis including Principle Components Analysis (PCA) and Discriminant Function Analysis (DFA). PCA extracted 6 and 4 components (eigenvalues 1) cumulatively explaining 63.67% and 60.88% of the variance for males and females, respectively. Bartlett's Test of Sphericity was significant (P
Download or read book Status of the American Shad Alosa Sapidissima Wilson in North Carolina written by Sara E. Winslow and published by . This book was released on 1990 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Migration and Spawning of Anadromous Shads in the Roanoke River North Carolina written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Anadromous alosines are ecologically, commercially, and recreationally valuable fishes. Some populations of alosines are at historically low levels, as a result of overfishing, pollution and habitat change, including the presence of dams, which block access to historic spawning sites upstream and alter spawning habitat downstream. To aid in the restoration of alosine stocks, I evaluated several methods for spawning habitat identification and characterization and evaluated trap and transport as a method to give American shad Alosa sapidissima access to additional spawning habitat above dams in the Roanoke River, North Carolina and Virginia. The Roanoke River has four anadromous shads: American shad, hickory shad A. mediocris, blueback herring A. aestivalis, and alewife A. pseudoharengus. For all four alosines, spawning sites river-wide were most efficiently identified using plankton tows. Spawning habitat selection for hickory shad and river herring (blueback herring and alewife) could be evaluated using spawning pads, whereas American shad eggs were unsuccessfully sampled by spawning pads and spawning habitats were best examined by visual observations of spawning splashes. Unlike the other alosines in this study, very little is known about spawning habitat for hickory shad. Hickory shad eggs were collected at water temperatures from 10 to 23 Ã'ÂðC, and peaked from 11 to 14 Ã'ÂðC. Spawning generally occurred in water velocities Ã؉ÂÆ0.1 m/sec, over substrates free from silt. Standard USFWS and Bayesian belief network formats were used to develop preliminary habitat suitability models for hickory shad. Bayesian belief networks are a relatively new method for modeling habitat suitability for fishes, but could prove very useful in the future, especially for species such as American shad which have been the focus of more study and are in need of restoration. We evaluated movement patterns and spawning of sonic-tagged adult American shad transported to habitats above da.
Download or read book Age Growth and Fecundity of Hickory Shad Alosa Mediocris in Virginia Costal Rivers written by Emily Rountrey Watkinson and published by . This book was released on 2003 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Migration and Spawning of Anadromous Shads in the Roanoke River North Carolina written by Julianne Elaine Harris and published by . This book was released on 2010 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: Alosines, American shad, hickory shad, spawning habitat, effects of dams, matrix model.
Download or read book Investigating the Reproductive Migration of Adult Hickory Shad Alosa Mediocris written by Joshua Graham Murauskas and published by . This book was released on 2006 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Life History Aspects of American Shad Alosa Sapidissima and Predation on Young of the year Shad in Lake Umatilla of the Columbia River written by Cris Eric Stainbrook and published by . This book was released on 1982 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected life history aspects of American shad, Alosa sapidissima, collected in Lake Umatilla of the Columbia River during 1980 and 1981 were examined and compared to other shad populations. Mean fork lengths of adult shad captured in 1981 were 405-, 415- and 423-mm for age III, IV and V males; 425-, 444- and 457-mm for age III, IV and V females. The mean age at maturity was determined to be 3.2 years for males and 3.5 years for females while the rate of repeat spawning was 36% and 45% for males and females, respectively. Four-year-old shad accounted for 58.5% of the spawning adults in the two years. Absolute fecundity ranged from 97,168 to 284,240 eggs with a mean of 193,074 eggs per female. Young-of-the-year shad were more abundant in 1980 than in 1981. In both years, the tail-race zone was the most important spawning area and the island zone the most important rearing area for young-of-the-year shad in the reservoir. Growth of young shad in Lake Umatilla was similar in all sampled macrohabitats and appears to be dependent on year class strength, water temperature and water flow. Out-migrating young-of-the-yetar shad passing through John Day Dam were significantly largjer than young-of-the-year shad in reservoir habitats indicating size, as well as temperature, influences the timing of downstream migration. Predation on young shad by resident predator fish species was variable and appeared to be dependent on the Abundance of young-of-the-year shad.
