Relevant bibliographies by topics / Carcharhinus plumbeus

Academic literature on the topic 'Carcharhinus plumbeus'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Carcharhinus plumbeus.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Carcharhinus plumbeus"

1

Chiaramonte, Gustavo E. "The shark genus Carcharhinus Blainville, 1816 (Chondrichthyes : Carcharhinidae) in Argentine waters." Marine and Freshwater Research 49, no. 7 (1998): 747. http://dx.doi.org/10.1071/mf97249.

Full text
Abstract:
The purpose of this contribution is to review the species of the shark genus Carcharhinus found along the coast of Argentina. New southern limits for the distribution of the genus are given for the western South Atlantic. The presence of Carcharhinus leucas (Valenciennes, 1839) is recorded for the first time on the Province of Buenos Aires coast. New evidence is given which confirms the presence of Carcharhinus brachyurus(GÜnther, 1870) in the area. Carcharhinus plumbeus (Nardo, 1827) is known from only a single Argentine record. Carcharhinus longimanus (Poey, 1861) has been recorded from oceanic waters offshore of Argentina, but has not been taken from continental shelf waters. Resumen. En éste trabajo se revisan las especies de tiburones del género Carcharhinus encontradas en la costa de la Argentina. Nuevos límites septentrionales para la distribución de las especies del género en el Atlántico Sudoccidental son presentados. Se refiere por primera vez la presencia de Carcharhinus leucas (Valenciennes, 1839) para la costa de la Provincia de Buenos Aires. Se presenta nueva evidencia que confirma la presencia de Carcharhinus brachyurus (GÜnther, 1870) en el área. Carcharhinus plumbeus (Nardo, 1827) ha sido citado una sóla vez para Argentina. Carcharhinus longimanus (Poey, 1861) ha sido registrado en aguas oceánicas frente a la plataforma de Argentina, pero no en aguas sobre la plataforma continental.
APA, Harvard, Vancouver, ISO, and other styles
2

Medved, R. J. "Gastric evacuation in the sandbar shark, Carcharhinus plumbeus." Journal of Fish Biology 26, no. 3 (March 1985): 239–53. http://dx.doi.org/10.1111/j.1095-8649.1985.tb04263.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Consoli, P., T. Romeo, G. Florio, F. Perdichizzi, S. Greco, M. Vacchi, and P. Rinelli. "First record of Carcharhinus plumbeus (Pisces: Carcharhinidae) from the southern Tyrrhenian Sea." Journal of the Marine Biological Association of the United Kingdom 84, no. 5 (October 2004): 1085–86. http://dx.doi.org/10.1017/s0025315404010471h.

Full text
Abstract:
One juvenile specimen of the sandbar shark Carcharhinus plumbeus was recorded for the first time from the southern Tyrrhenian Sea. The specimen has been collected in an area of the Sicilian coast where trawling is banned except for scientific purposes. Morphometrics and meristics data are given.
APA, Harvard, Vancouver, ISO, and other styles
4

McAuley, R. B., C. A. Simpfendorfer, and I. W. Wright. "Gillnet mesh selectivity of the sandbar shark (Carcharhinus plumbeus): implications for fisheries management." ICES Journal of Marine Science 64, no. 9 (September 18, 2007): 1702–9. http://dx.doi.org/10.1093/icesjms/fsm136.

Full text
Abstract:
Abstract McAuley, R. B., Simpfendorfer, C. A., and Wright, I. W. 2007. Gillnet mesh selectivity of the sandbar shark (Carcharhinus plumbeus): implications for fisheries management. – ICES Journal of Marine Science, 64. Gillnet mesh selectivity parameters for the sandbar shark (Carcharhinus plumbeus) were estimated from catches taken by an experimental net of six panels of mesh, varying in size from 10.2 to 25.4 cm. The length selectivity of each mesh size was described by five different models. According to model deviance values, the four models based on the SELECT method of estimation provided better fits to the data than the gamma model previously applied to sharks. Lengths at maximum selectivity were estimated to be between 5.3 and 7.0×stretched mesh size. The breadth of the selectivity curves was greater than have been reported for most species of shark. Lognormal and normal curve forms yielded the lowest model deviance and were judged to provide the best fits to the data. Peak selectivity of the commercially utilized mesh sizes was generally estimated to be greater than the observed modal length class of the commercial C. plumbeus catch. This suggests that a relatively high abundance of smaller sharks in the study area offsets gear selectivity effects in determining the size composition of commercial catches. These results have important implications for the recovery of this overexploited stock and also for managing international gillnet fisheries for the species.
APA, Harvard, Vancouver, ISO, and other styles
5

Cox, Georgina K., Richard W. Brill, Kaitlin A. Bonaro, and Anthony P. Farrell. "Determinants of coronary blood flow in sandbar sharks, Carcharhinus plumbeus." Journal of Comparative Physiology B 187, no. 2 (September 27, 2016): 315–27. http://dx.doi.org/10.1007/s00360-016-1033-x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Braccini, Matias, Brett Molony, and Nick Blay. "Patterns in abundance and size of sharks in northwestern Australia: cause for optimism." ICES Journal of Marine Science 77, no. 1 (October 10, 2019): 72–82. http://dx.doi.org/10.1093/icesjms/fsz187.

Full text
Abstract:
Abstract Reliable information for population assessments is rare for sharks. We quantified patterns in catch rates and mean size for numerous tropical and subtropical species from 15 years of fishery-independent surveys (2002–2017) in northwestern Australia. This study region represents an area of ~0.8 million km2 which was closed to commercial shark fishing from 1993 or 2005 onward due to the very high State-wide catches of sandbar (Carcharhinus plumbeus) and dusky (Carcharhinus obscurus) sharks. A total of 43 shark and ray species were sampled, with sandbar shark being the most commonly caught species, followed by milk (Rhizoprionodon acutus), spot-tail (Carcharhinus sorrah), tiger (Galeocerdo cuvier), blacktip (Carcharhinus limbatus and Carcharhinus tilstoni), dusky and sliteye (Loxodon macrorhinus) sharks, and scalloped hammerhead (Sphyrna lewini). For sandbar shark, catch rates increased between 2008 and 2017 whereas for other taxa catch rates were mostly stable (albeit fluctuating). Mean size at capture fluctuated across years with no particular trends. Unlike for other parts of the world, catch rates and mean size of northwestern Australian sharks have been stable or increased in recent years. Though most shark species have conservative life histories, when science, management and enforcement work synergistically, sustainable resource use, recovery and conservation outcomes can all be achieved.
APA, Harvard, Vancouver, ISO, and other styles
7

Siegenthaler, A., P. R. W. Niemantsverdriet, M. Laterveer, and I. M. A. Heitkönig. "Aversive responses of captive sandbar sharks Carcharhinus plumbeus to strong magnetic fields." Journal of Fish Biology 89, no. 3 (June 20, 2016): 1603–11. http://dx.doi.org/10.1111/jfb.13064.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Joung, Shoou-Jeng, Yih-Yia Liao, and Che-Tsung Chen. "Age and growth of sandbar shark, Carcharhinus plumbeus, in northeastern Taiwan waters." Fisheries Research 70, no. 1 (November 2004): 83–96. http://dx.doi.org/10.1016/j.fishres.2004.06.018.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Hohman, V. S., S. F. Schluter, and J. J. Marchalonis. "Diversity of Ig light chain clusters in the sandbar shark (Carcharhinus plumbeus)." Journal of Immunology 155, no. 8 (October 15, 1995): 3922–28. http://dx.doi.org/10.4049/jimmunol.155.8.3922.

Full text
Abstract:
Abstract The genes encoding Ig chains in elasmobranchs are arranged in clusters or cassettes, an organizational pattern dramatically different from the mammalian translocon gene arrangement. Cluster gene arrangements, which have now been found in non-elasmobranchs as well, pose interesting dilemmas for understanding the mechanisms of Ig gene expression and regulation in terms of allelic exclusion and clonal selection. We have sequenced five lambda genomic clones encoding complete sandbar shark (Carcharhinus plumbeus) lambda L chain gene loci. While the coding regions among all five clones are highly homologous, the noncoding regions have significant differences that allowed us to identify two types of lambda L chain clusters. The noncoding regions are < 60% identical between groups, while the three clones belonging to the first group share > 95% identity in their noncoding regions. The second group is more diverse and may be comprised of several related subgroups. The two clones in this group share approximately 85% identity in the noncoding regions. Variations in the promoter region, including octamer and TATA box orientation and position, are identified between the two groups and may have implications for the molecular regulation of Ab production. Our results show the sandbar shark lambda L chain family to be a complex and diverse system.
APA, Harvard, Vancouver, ISO, and other styles
10

Benz, George W. "Developmental stages of Alebion lobatus Cressey, 1970 (Copepoda: Euryphoridae) found parasitic on the sandbar shark (Carcharhinus plumbeus (Nardo, 1827)) in the western North Atlantic, and a phylogenetic analysis of the genus Alebion Krøyer, 1863." Canadian Journal of Zoology 67, no. 6 (June 1, 1989): 1578–98. http://dx.doi.org/10.1139/z89-224.

Full text
Abstract:
Three stages of copepodids, two preadults, and male and female adult Alebion lobatus collected from sandbar sharks (Carcharhinus plumbeus) in the western North Atlantic are described. Copepodids were found on the external body surface of hosts in hollows which were apparently formed by the absence of one to several placoid scales. A frontal filament was not observed in any developmental stage and the second antennae appeared to be the primary prehensile appendages. Two equally most parsimonious cladograms are presented as hypotheses of phylogenetic relationship for the eight known species of Alebion.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Carcharhinus plumbeus"

1

Thomas, Cameron Culver Hovey 1963. "Characterization of a Carcharhinus plumbeus immunoglobulin heavy chain gene." Thesis, The University of Arizona, 1993. http://hdl.handle.net/10150/278329.

Full text
Abstract:
Toward developing a comprehensive understanding of the molecular origins and changes to the recombining segmental antibody gene, I submit the present examination of the changes in immunoglobulin heavy chain coding segments over the 180-million year span separating carcharine from horned sharks. In this study, nucleic acid sequences from Carcharhinus plumbeus (sandbar shark) immunoglobulin heavy chain constant and post-Joining regions are given along with a restriction map showing the arrangement of these components within a single genomic heavy chain fragment. These sequences and map are compared with those from the horned shark, Heterodontus francisci and the nurse shark, Ginglymostoma cirratum. Shark immunoglobulin nucleic acid segments are also compared with known sequences of rat and skate, and corresponding amino acid sequences aligned with those of toad, chicken, mouse and man.
APA, Harvard, Vancouver, ISO, and other styles
2

Dowd, W. Wesley. "Metabolic Rates and Bioenergetics of Juvenile Sandbar Sharks (Carcharhinus plumbeus)." W&M ScholarWorks, 2003. http://www.vims.edu/library/Theses/Dowd03.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Hohman, Valerie Sue. "Characterization of immunoglobulin light chain genes in the sandbar shark, Carcharhinus plumbeus." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186634.

Full text
Abstract:
In order to understand the evolution of the rearranging immunoglobulin system, it is necessary to examine living representatives of the most primitive vertebrate phyla. Immunoglobulins are the major recognition and defense molecules of the humoral immune response and are found in all vertebrates. While early studies demonstrated that the general structure of immunoglobulins has remained relatively unchanged throughout evolution, the organization of their encoding genes differs dramatically. Elasmobranchs, which include the sharks, skates, and rays, are the most ancient phylogenetic class of vertebrates from which immunoglobulin DNA sequences have been obtained. The Carcharhinoid sharks are of considerable interest for evolutionary studies because they are an old order whose ancestors date back to the Jurassic period. Immunoglobulin light chain genes of the sandbar shark (Carcharhinus plumbeus) were characterized as to their DNA sequence as well as their number and arrangement within the genome. Sequence of a cDNA clone encoding sandbar shark light chain demonstrates that their Ig light chains are homologous to mammalian λ chains with shark sequences sharing ∼40-50% identity with human λ chains. Analysis of sandbar shark genomic light chain clones by mapping and DNA sequencing demonstrates that sharks have a unique Ig gene arrangement system in which the genes are organized into clusters or cassettes spanning 4.3 to 6 kilobases and contain a single variable (V), joining (J), and constant (C) gene. The light chain clusters can be divided into two patterns based upon spacing differences between the J and C genes. A unique finding of this study is that the V and J genes are fused within the germline. PCR analysis of genomic DNA extends this finding, demonstrating that VJ fusion is the predominant organizational feature of sandbar shark immunoglobulin light chain genes. This finding raises questions concerning the necessity of recombination to produce an antibody repertoire capable of reacting against a diverse array of antigens. While such fusion may initially suggest a lack of light chain diversity in these animals, the results of this study strongly supports the hypothesis that sandbar sharks can potentially express a highly diverse light chain repertoire.
APA, Harvard, Vancouver, ISO, and other styles
4

Ellis, Julia K. "Diet of the Sandbar Shark, Carcharhinus plumbeus, in Chesapeake Bay and Adjacent Waters." W&M ScholarWorks, 2003. http://www.vims.edu/library/Theses/Ellis03.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Pace, Leonard. "Habitat Utilization and Salinity Tolerance of the Sandbar Shark, Carcharhinus plumbeus, in Virginia." W&M ScholarWorks, 2006. https://scholarworks.wm.edu/etd/1539617845.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Romine, Jason G. "Age, growth, and demography of the sandbar shark, Carcharhinus plumbeus, over temporal and spatial scales." W&M ScholarWorks, 2008. https://scholarworks.wm.edu/etd/1539616830.

Full text
Abstract:
Numbers of sandbar sharks, Carcharhinus plumbeus, in the Northwest Atlantic have experienced drastic declines since the early 1980's reaching their minima during the early 1990's. Catch rates in the early 1990's were a mere 25% of those during the 1980's. Such drastic reductions in other fish stocks have often caused compensatory responses, most notably the cod stocks in the Northwest Atlantic. Compensatory responses in depressed populations may include decreased natural mortality, increased fecundity, or increased growth rates. Compensation for population fluctuations below carrying capacities have been recognized for many terrestrial and oceanic r-selected organisms, but few instances have been noted for K-selected species. Due to slow-growth and late maturity, compensatory responses in K-selected species such as the sandbar shark probably require generation-scale time periods to become evident. A previous age and growth study discovered slight increases in juvenile sandbar shark growth rates when vertebral centra samples obtained in 1980-81 and 1990-1992 were compared. The Virginia Institute of Marine Science shark long-line survey reported the lowest abundance of sandbar sharks in 1992. Animals pupped during this time may display greater differences in growth rates due to drastically reduced population size. Samples obtained over the 2001-2004 time period were compared to the aforementioned time periods to investigate potential compensatory responses in the sandbar shark population in the Northwest Atlantic. Growth estimates for the sandbar shark, Carcharhinus plumbeus, in the Northwestern Atlantic were estimated using a reparameterized von Bertalanffy growth model. Sharks were tagged in Virginia waters with roto-tags and double return nylon dart tags from 1992 to 2006 by the shark longline survey of the Virginia Institute of Marine Science. Captured sharks were measured, tagged, and released by VIMS scientists. Age and growth estimates were determined for the sandbar shark, Carcharhinus plumbeus, from Oahu, Hawaii in the central Pacific Ocean. Age estimates were obtained through vertebral centra analysis of 187 sharks. We verified our age estimates through marginal increment analysis of centra and oxytetracycline marking methods of at-liberty sandbar sharks. Sizes of sampled sharks ranged from 46 cm to 147 cm pre-caudal length. Four growth models were fitted to length-at-age data; two forms of the von Bertalanffy growth model, the Gompertz growth model, and a logistic growth model. Males and females exhibited statistically significant differences in growth, indicating that females grow slower and attain larger sizes than males. Growth parameter estimates revealed slower growth rates than previously estimated (based on captive specimens) for Hawaiian sandbar sharks. The von Bertalanffy growth model using empirical length-at-birth provided the best biological and statistical fit to the data. This model gave parameter estimates of L infinity .=138.5 cm PCL and k=0.12 year-1 for males and Linfinity=152.8 cm PCL, k=0.10 year-1 for females. Male and female sandbar sharks mature at approximately 8 and 10 years of age respectively. The population of sandbar sharks in the Hawaiian Islands is an unfished population. The presents a unique opportunity to conduct demographic analyses on a virgin population of sandbar sharks. Most populations of sandbar sharks have been heavily exploited due to near coastal and estuarine habitat preferences and high demand for fins. Conversely the population of sandbar sharks in the Northwest Atlantic (NWA) has suffered severe declines since the early 1980's. Previous studies have suggested compensatory growth is occurring within this population, but the true effect at the population level has not been estimated. Life history parameters estimated for the Hawaii population, the NWA population in 1980-1981 and 2000-2004 time periods were used in stochastic age-based life tables and Leslie matrices to estimate demographic parameters. Yield recruit-1 relationships were estimated for the Hawaii population to determine optimal harvest strategies that would maintain a population at equilibrium. Population growth for the Hawaii population was estimated to be 1.014 year-1. Yield recruit-1 analyses suggested harvest of sharks 15 years of age and older would provide the greatest yield while not causing population decline. Population growth for sandbar sharks in the NWA was 1.009-1 year for the 1980-1981 time period and 1.030-1 year for the 2000-2004 time period. (Abstract shortened by UMI.).
APA, Harvard, Vancouver, ISO, and other styles
7

Sminkey, Thomas R. "Age, growth and population dynamics of the sandbar shark, Carcharhinus plumbeus, at different population levels." W&M ScholarWorks, 1994. https://scholarworks.wm.edu/etd/1539616858.

Full text
Abstract:
The objectives of my research were to test the hypothesis that compensatory (density-dependent) growth of sandbar shark (Carcharhinus plumbeus) occurred after severe population reduction, to describe the juvenile sandbar shark fauna present in the Chesapeake Bay during 1980-81 and 1990-93, and to perform demographic analyses to examine potential population growth. Age and growth of sandbar sharks were investigated by counting rings in vertebral samples collected in 1980-81 and 1991-92. Age at maturity was 15-16 years for both sample periods and both sexes. For sexes combined, the von Bertalanffy growth parameters were L&\sb{lcub}\infty{rcub}& = 199 cm precaudal length (PCL), K = 0.057, t&\sb{lcub}\rm o{rcub}& = &-&4.9 years for the 1980-81 sample and L&\sb{lcub}\infty{rcub}& = 164 cm PCL, K = 0.089, t&\sb{lcub}\rm o{rcub}& = &-&3.8 years for the 1991-92 sample. Significant differences in size at age and annual incremental growth of juveniles suggest a small increase in juvenile sandbar shark growth rate between the two sampling periods. Annual catches of sharks &>&105 cm PCL declined substantially between survey periods. Males and females were present in a 1:1 ratio. During 1980-81 juveniles ranged in age from 0-7 yr, but in 1990-93 few sandbar sharks over age 4 were taken. Based on the best estimate of fishing mortality the population ranged from 10,087 to 8509 sharks from 1989-1993. Annual year-class size was variable but all estimates were within one order of magnitude. Juvenile sandbar sharks declined in abundance by approximately 15% between 1989 and 1993. The annual population growth rate was highest under a scenario of natural mortality (M) = 0.05 and maximum age of 30 yr, but was only 11.9%/yr. at higher juvenile mortality rates and adult M fixed at 0.10, the best estimate of M for sandbar sharks, population growth rate was only 2.6%/yr. Adding fishing mortality (F) at immature ages caused the population to decline unless F levels were &<&0.10 and 0.05 at maximum age = 30 and 60 yr, respectively. It is apparent that sandbar shark populations will decline under any substantial fishing mortality on immature ages, and mature fish can only be exploited at very low levels of fishing mortality.
APA, Harvard, Vancouver, ISO, and other styles
8

Piercy, Andrew. "Reproduction of the sandbar shark, Carcharhinus plumbeus, in the western North Atlantic Ocean and Gulf of Mexico." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024745.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Grubbs, R. Dean. "Nursery delineation, habitat utilization, movements, and migration of juvenile Carcharhinus plumbeus in Chesapeake Bay, Virginia, United States of America." W&M ScholarWorks, 2001. https://scholarworks.wm.edu/etd/1539616675.

Full text
Abstract:
Chesapeake Bay is possibly the largest summer nursery for Carcharhinus plumbeus in the western Atlantic. Longline sampling conducted from 1990--1999 was used to delineate this nursery spatially and temporally. Catch data from 83 longline stations sampled throughout the Virginia Chesapeake Bay were analyzed as a function of nine physical and environmental variables to delineate this nursery spatially. Tree-based models determined which variables best discriminated between stations with high and low catches and indicated that complex distribution patterns could be adequately modeled with few variables. The highest abundance of juvenile sharks was predicted where salinity was greater than 20.5 and depth was greater than 5.5 meters. Longline data from 100 sets made at two standard stations in the lower Bay indicated that immigration occurred in late May and early June and was highly correlated with increasing water temperature. Emigration from the estuary occurred in late September and early October and was highly correlated with decreasing day length. Between 1995 and 2000, 1846 juvenile C. plumbeus were tagged. With two exceptions, recaptures made in summer months were within 50 kilometers of the tagging location. Those recaptured in winter months were caught between 200 and 830 kilometers from the tagging location and indicated that the coastal waters of North Carolina and South Carolina serve as important winter nurseries from late October until May. Tag recaptures made in subsequent summers suggest that most juvenile sandbar sharks return to the same summer nurseries annually. Ultrasonic telemetry was used in investigate the diel activity patterns of juvenile C. plumbeus in Chesapeake Bay. Ten sharks were tracked for 10 to 50 consecutive hours. Swimming direction was correlated with mean direction of 2 tidal currents. Mean activity space was conservatively estimated to be 110 km2, which is two orders of magnitude greater than that reported for other carcharhiniform species. Swimming depth ranged from surface to 40 meters and was significantly deeper during the day (12.8 meters) than during the night (8.5 meters). This diel activity pattern and large activity space is hypothesized to be an adaptation for foraging on patchy prey in a productive, yet dynamic, temperate estuary.
APA, Harvard, Vancouver, ISO, and other styles
10

McAuley, Rory B. "Investigation of the fishery biology and population status of the sandbar shark (Carcharhinus plumbeus, Nardo 1827) in Western Australian waters." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2007. https://ro.ecu.edu.au/theses/280.

Full text
Abstract:
The sandbar shark (Carchrarhinus plumbeus) is a commercially important shark species to fisheries around the world but is known to be highly susceptible to over·fishing. During the late 1990s, changes in the targeting practices of Western Australian demersal gillnet fishing vessels, and an expansion of targeted demersal longlining in the north of the State, caused a rapid escalation in C. plumbeus catches. This study therefore aimed to collect the biological and fishery data necessary to assess the impacts of increasing exploitation of the species and to develop biologically appropriate techniques for assessing the sustainability of these fishery developments.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Carcharhinus plumbeus"

1

Romine, Jason G., R. Dean Grubbs, and John A. Musick. "Age and growth of the sandbar shark, Carcharhinus plumbeus, in Hawaiian waters through vertebral analysis." In Developments in Environmental Biology of Fishes, 229–39. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/978-1-4020-5570-6_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

"sandbar shark Carcharhinus plumbeus (Hamlett el a/. 1985c) and." In Reproductive Biology and Phylogeny of Chondrichthyes, 501–12. CRC Press, 2011. http://dx.doi.org/10.1201/9781439856000-37.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

"Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States." In Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States, edited by GLENN F. ULRICH, CHRISTIAN M. JONES, WILLIAM B. DRIGGERS, J. MARCUS DRYMON, DOUGLAS OAKLEY, and CATHERINE RILEY. American Fisheries Society, 2007. http://dx.doi.org/10.47886/9781888569810.ch8.

Full text
Abstract:
<em>Abstract.</em>—Sharks were collected from the estuarine and nearshore waters of South Carolina in an effort to delineate nursery grounds for coastal sharks within state waters. From March 1998 through December 2003, 4,098 sharks, representing 12 species, were collected using gill-net and hand-deployed longline fishing gears provided by the Cooperative Atlantic States Shark Pupping and Nursery Survey. To supplement these data, records of 6,648 shark captures, representing 16 species, from a long-term longline survey in South Carolina coastal waters were incorporated into the analyses. The results of this study indicate that the estuarine and nearshore waters of South Carolina represent an important primary nursery area for finetooth sharks <em>Carcharhinus isodon</em>, blacktip sharks <em>C. limbatus</em>, sandbar sharks <em>C. plumbeus</em>, Atlantic sharpnose sharks <em>Rhizoprionodon terraenovae</em>, and scalloped hammerheads <em>Sphyrna lewini</em>.
APA, Harvard, Vancouver, ISO, and other styles
4

"Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States." In Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States, edited by JAMES GELSLEICHTER, NANCY J. SZABO, and JOHN J. MORRIS. American Fisheries Society, 2007. http://dx.doi.org/10.47886/9781888569810.ch10.

Full text
Abstract:
<em>Abstract.</em>—Because of their tendency to accumulate in estuaries and coastal regions, organochlorine (OC) contaminants such as pesticides and polychlorinated biphenyls (PCBs) represent potential threats to the quality of essential fish habitat for many shark species. These compounds pose special risks to immature sharks in particular because of their ability to impair growth and sexual maturation in juvenile fish at environmentally relevant levels of exposure. In order to assess the extent of these risks in shark populations on the East Coast of the United States, the present study examined concentrations of 30 OC pesticides/pesticide metabolites and total PCBs in juvenile sandbar <em>Carcharhinus plumbeus </em>and blacktip <em>C. limbatus </em>sharks from seven major nursery areas in the western Atlantic Ocean and eastern Gulf of Mexico. Quantifiable levels of PCBs and 13 OC pesticides/ pesticide metabolites were detected via gas chromatography and mass spectrometry in liver of 25 young-of-the-year blacktip sharks from the southeastern U.S. Atlantic coast and three regions on Florida’s gulf coast: Cedar Key, Tampa Bay, and Charlotte Harbor. Similarly, quantifiable levels of PCBs and 14 OC pesticides/metabolites were detected in 23 juvenile <em>C. plumbeus </em>from three sites on the northeastern U.S. coast: middle Delaware Bay, lower Chesapeake Bay, and Virginia’s eastern shore. Liver OC concentrations in Atlantic sandbar and blacktip sharks were higher than expected and, in some cases, comparable with elevated levels observed in deep-sea and pelagic sharks. Although significantly lower than those observed in Atlantic sharks, pesticide and PCB levels in Florida blacktip sharks were similar to, if not greater than, OC concentrations reported in adults of other coastal shark species. Based on these data, OC contamination appears to pose significant threats to habitat quality in sandbar and blacktip shark nursery areas on the U.S. Atlantic coast.
APA, Harvard, Vancouver, ISO, and other styles
5

"Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States." In Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States, edited by REBEKA R. MERSON and HAROLD L. PRATT. American Fisheries Society, 2007. http://dx.doi.org/10.47886/9781888569810.ch3.

Full text
Abstract:
<em>Abstract.</em>—Historically, primary nursery (pupping) grounds of the sandbar shark <em>Carcharhinus plumbeus </em>along the U.S. East Coast extended as far north as Great South Bay, Long Island, New York. We conducted gill-net and hook-and-line surveys during July and August 1996, in coastal bays of New Jersey and New York, to investigate whether these historical nursery areas were still utilized by sandbar sharks. No sandbar sharks were caught in Great South Bay, Shinnecock Bay, or Peconic Bay, New York or in Barnegat Bay, New Jersey. Seventeen sandbar sharks measuring 42– 52 cm fork length (47–62 cm total length) were captured in Great Bay, New Jersey; all sandbar sharks had unhealed umbilical scars and 35% carried umbilical cord remains, indicative of recent birth. Sharks were tagged and released. Three of these sharks were recaptured (18% recapture rate); one sandbar shark was recaptured in Great Bay 3.7 km from the release location, and two sharks were recaptured the following March off Cape Hatteras, North Carolina by commercial fishermen in the same gill-net set. In conclusion, the results from this study indicate that Great Bay, New Jersey continues to be a primary nursery ground for the sandbar shark, and the study results also contribute to the understanding of migratory patterns for this species.
APA, Harvard, Vancouver, ISO, and other styles
6

"Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States." In Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States, edited by CAMILLA T. MCCANDLESS, HAROLD L. PRATT, NANCY E. KOHLER, REBEKA R. MERSON, and CONRAD W. RECKSIEK. American Fisheries Society, 2007. http://dx.doi.org/10.47886/9781888569810.ch4.

Full text
Abstract:
<em>Abstract.</em>—Delaware Bay is one of two principal nursery grounds for the sandbar shark <em>Carcharhinus plumbeus </em>in United States coastal waters, with the second one located in Chesapeake Bay. Tagging studies were conducted for juvenile sandbar sharks in Delaware Bay during their summer nursery seasons from 1995 to 2000 using gill-net (1995–2000) and longline (1997–2000) gears. These studies were designed to aid fishery managers in defining essential fish habitat for juvenile sandbar sharks tagged in Delaware Bay by determining spatial and temporal distributions, overwintering grounds, and philopatry to natal nursery areas. A total of 2,066 juvenile sandbar sharks were caught in Delaware Bay from 1995 to 2000, and 87% of the sharks sampled were tagged before release. Of these tagged sharks, 156 (9%) have been recaptured through 2005. Juvenile sandbar sharks were most abundant along the Delaware coast, with more localized abundances on the shoal areas throughout the bay. Recaptures indicate that the majority of sandbar sharks born in Delaware Bay return to their natal nurseries for up to 5 years following birth (and potentially up to 12 years of age), overwinter off North Carolina, and eventually expand their range south to the east coast of Florida and into the Gulf of Mexico as they get larger. This study also provides the first evidence of mixing between the juvenile sandbar shark populations of Delaware and Chesapeake Bays during the summer nursery season.
APA, Harvard, Vancouver, ISO, and other styles
7

"Life in the Slow Lane: Ecology and Conservation of Long-Lived Marine Animals." In Life in the Slow Lane: Ecology and Conservation of Long-Lived Marine Animals, edited by Enric Cortés. American Fisheries Society, 1999. http://dx.doi.org/10.47886/9781888569155.ch9.

Full text
Abstract:
<em>Abstract.</em> —The sandbar shark <em>Carcharhinus plumbeus </em> is the most important species caught in the commercial shark fishery operating off the U.S. Atlantic and Gulf of Mexico coasts. Previous demographic studies of this and other species of sharks have utilized age-structured, deterministic life tables that provided point estimates of maximum rates of increase. To reduce some of the uncertainty in estimates of age at maturity and longevity—especially acute in the case of the sandbar shark—I constructed a stage-based model based on an Usher matrix that utilizes the more reliable estimates of size at maturity and maximum size for this species in the northwest Atlantic. Because demographic variability also can affect estimated rates of increase, I introduced stochasticity into the model by randomly selecting fecundity rates from an empirically determined distribution, and natural mortality rates from estimates obtained through four life history methods. The simulation model was applied to females only. Population projections 20 years forward in time without exploitation predicted slowly growing populations at approximately 1.3%/year. Application of a constant instantaneous mortality rate (<EM>F</EM> ) of 0.1 to each stage-class separately indicated that removal of large juveniles would produce the greatest population declines, whereas removal of age-0 individuals would be sustainable. The simulation model was then used to predict potential outcomes under three hypothetical harvesting scenarios using the current U.S. commercial quota indicating that all strategies produced pronounced population declines.
APA, Harvard, Vancouver, ISO, and other styles
8

"Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States." In Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States, edited by R. DEAN GRUBBS and JOHN A. MUSICK. American Fisheries Society, 2007. http://dx.doi.org/10.47886/9781888569810.ch5.

Full text
Abstract:
<em>Abstract.</em>—The lower Chesapeake Bay is the largest summer nursery for sandbar sharks <em>Carcharhinus plumbeus </em>in the western Atlantic. The objective of this study was to define essential fish habitat for juvenile sandbar sharks in this estuary. The longline survey conducted by the Virginia Institute of Marine Science was expanded from 1990 to 1999 to include ancillary stations throughout the Virginia portion of Chesapeake Bay to delineate this nursery spatially. We analyzed catch per unit of effort data from 83 stations as a function of nine physical and environmental variables using tree-based regression models. The highest abundance of juvenile sandbar sharks was predicted where salinity was greater than 20.5 (practical salinity scale) and depth was greater than 5.5 m. The models also suggested that dissolved oxygen concentration may influence shark distribution. To increase applicability of the models to management practices, we introduced distance to the mouth of the estuary as a surrogate variable for salinity. The models estimated that the highest abundance of sharks was in areas less than 34.5 km from the mouth of the estuary and in depths greater than 5.5 m. The areas of the estuary that met the criteria of the models, based on the threshold values of the variables, were mapped spatially in a geographic information system. The resulting response surfaces were interpreted to represent essential nursery habitat for sandbar sharks in Chesapeake Bay. Both models performed very well using several dependent and independent measures to estimate their classification and predictive ability. We used logistic regression with presence/absence data to validate the tree models. The logistic regression models agreed very well with the tree-based regression models, selecting the same variable combinations to predict sandbar shark presence and absence.
APA, Harvard, Vancouver, ISO, and other styles
9

"Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States." In Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States, edited by GREGORY B. SKOMAL. American Fisheries Society, 2007. http://dx.doi.org/10.47886/9781888569810.ch2.

Full text
Abstract:
<em>Abstract.</em>—To identify and characterize shark nursery habitat in the coastal waters of Massachusetts, longline and shark angler surveys were conducted from 1989 to 2002 in the neritic waters of Nantucket Sound, Massachusetts. Additional samples and information were opportunistically collected from recreational and commercial fishermen, as well as published sources. A total of 123 longline sets of 5,591 hooks caught 372 sharks consisting of 344 (92.5%) smooth dogfish <em>Mustelus canis</em>, 23 (6.2%) sandbar sharks <em>Carcharhinus plumbeus</em>, and 5 (1.3%) dusky sharks <em>C. obscurus</em>. The sharks were taken during the period of 16 June–24 September in water temperature and depth ranges of 16.0–27.2°C and 1.2–27.1 m, respectively. Longline catch rates (number of sharks per longline set) were stratified by species, area, month, year, water temperature, and depth. Angler surveys reported the capture of 294 sharks, including sandbar sharks (72%) and smooth dogfish (28%). Data from 540 neonatal and adult smooth dogfish ranging 27.5–121.0 cm fork length (FL) support the conclusion that the neritic waters of southern Massachusetts serve as primary nursery habitat for this species. Size and sex data from 235 juvenile sandbar sharks ranging 61.0–157.0 cm FL indicate that this region provides secondary nursery habitat for this species. Opportunistic samples of juvenile sand tiger <em>Carcharias taurus</em>, white shark <em>Carcharodon carcharias</em>, basking shark <em>Cetorhinus maximus</em>, and tiger shark <em>Galeocerdo cuvier </em>provide evidence that these species utilize Massachusetts coastal waters for secondary nursery habitat.
APA, Harvard, Vancouver, ISO, and other styles
10

"Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States." In Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States, edited by JOHN K. CARLSON. American Fisheries Society, 2007. http://dx.doi.org/10.47886/9781888569810.ch18.

Full text
Abstract:
<em>Abstract.</em>—A dynamic mass-balance ecosystem model (Ecopath with Ecosim) was used to investigate how relative changes in fishing mortality on sharks can affect the structure and function of Apalachicola Bay, Florida, a coastal marine ecosystem. Simulations were run for 25 years, wherein fishing mortality rates from recreational and trawl fisheries were doubled for 10 years and then decreased to initial levels. Effect of time/area closures on ecosystem components were also tested by eliminating recreational fishing mortality on juvenile blacktip sharks <em>Carcharhinus limbatus</em>. Simulations were run assuming mixed control and top-down control. In the mixed control, biomass of juvenile coastal sharks (finetooth shark <em>C. isodon</em>, spinner shark <em>C. brevipinna</em>, sandbar shark <em>C. plumbeus</em>), juvenile blacktip sharks, and bull sharks <em>C. leucas </em>declined up to 57% when recreational fishing mortality was doubled. Increases in biomass were also observed for the Atlantic sharpnose shark <em>Rhizoprionodon terraenovae </em>and, to a lesser extent, skates and rays. Increasing the fishing mortality imposed by trawl fisheries affected only a few elasmobranch groups, primarily skates and rays. Increases and decreases in biomass lasted only as long as fishing mortality was elevated, although a lag time was observed for some groups to recover to initial biomass. Simulating a time/ area closure for juvenile blacktip sharks caused increases in their biomass but decreases in juvenile coastal shark biomass, a competing multispecies assemblage that is the apparent competitor. Topdown control scenarios resulted in greater variation and magnitude of response than those elicited under mixed control, although the direction of the response was similar. In general, reduction of targeted sharks did not cause strong top-down cascades.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Carcharhinus plumbeus' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography