Výsledky vyhledávání - "Musick, John A."

Dual Annual Spawning Races in Atlantic Sturgeon Autor Balazik, Matthew T., Musick, John A.

“…Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus, Acipenseridae) populations in the United States were listed as either endangered or threatened under the…”
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Critical assessment and ramifications of a purported marine trophic cascade Autor Grubbs, R. Dean, Carlson, John K., Romine, Jason G., Curtis, Tobey H., McElroy, W. David, McCandless, Camilla T., Cotton, Charles F., Musick, John A.

“…When identifying potential trophic cascades, it is important to clearly establish the trophic linkages between predators and prey with respect to temporal…”
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Satellite tracking reveals a dichotomy in migration strategies among juvenile loggerhead turtles in the Northwest Atlantic Autor Mansfield, Katherine L, Saba, Vincent S, Keinath, John A, Musick, John A

“…Few data are available on the movements and behavior of immature Atlantic loggerhead sea turtles (Caretta caretta) from their seasonal neritic foraging grounds…”
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You can swim but you can't hide: the global status and conservation of oceanic pelagic sharks and rays Autor Dulvy, Nicholas K, Baum, Julia K, Clarke, Shelley, Compagno, Leonard J.V, Cortés, Enric, Domingo, Andrés, Fordham, Sonja, Fowler, Sarah, Francis, Malcolm P, Gibson, Claudine, Martínez, Jimmy, Musick, John A, Soldo, Alen, Stevens, John D, Valenti, Sarah

“…1.Fishing spans all oceans and the impact on ocean predators such as sharks and rays is largely unknown. A lack of data and complicated jurisdictional issues…”
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World phylogeography and male-mediated gene flow in the sandbar shark, Carcharhinus plumbeus Autor PORTNOY, DAVID S., MCDOWELL, JAN R., HEIST, EDWARD J., MUSICK, JOHN A., GRAVES, JOHN E.

“…The sandbar shark, Carcharhinus plumbeus, is a large, cosmopolitan, coastal species. Females are thought to show philopatry to nursery grounds while males…”
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Quantifying multiple threats to endangered species: an example from loggerhead sea turtles Autor Bolten, Alan B, Crowder, Larry B, Dodd, Mark G, MacPherson, Sandra L, Musick, John A, Schroeder, Barbara A, Witherington, Blair E, Long, Kristy J, Snover, Melissa L

“…The effectiveness of recovery plans for threatened and endangered species has been questioned in academic and political domains. A comprehensive assessment of…”
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Reproduction and embryonic development in two species of squaliform sharks, Centrophorus granulosus and Etmopterus princeps: Evidence of matrotrophy? Autor Cotton, Charles F., Dean Grubbs, R., Dyb, Jan E., Fossen, Inge, Musick, John A.

“…Modes of reproduction and embryonic development vary greatly among the elasmobranchs, and prior studies have suggested that the energetic toll of embryogenesis…”
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Comparative visual function in four piscivorous fishes inhabiting Chesapeake Bay Autor Horodysky, Andrij Z, Brill, Richard W, Warrant, Eric J, Musick, John A, Latour, Robert J

“…Maintaining optimal visual performance is a difficult task in photodynamic coastal and estuarine waters because of the unavoidable tradeoffs between luminous…”
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Bottom-up and Climatic Forcing on the Worldwide Population of Leatherback Turtles Autor Saba, V.S, Spotila, J.R, Chavez, F.P, Musick, J.A

“…Nesting populations of leatherback turtles (Dermochelys coriacea) in the Atlantic and western Indian Oceans are increasing or stable while those in the Pacific…”
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Comparative visual function in five sciaenid fishes inhabiting Chesapeake Bay Autor Horodysky, Andrij Z, Brill, Richard W, Warrant, Eric J, Musick, John A, Latour, Robert J

“…Maintaining optimal visual performance is a difficult task in the photodynamic coastal and estuarine waters in which western North Atlantic sciaenid fishes…”
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Genetic polyandry and sexual conflict in the sandbar shark, Carcharhinus plumbeus, in the western North Atlantic and Gulf of Mexico Autor PORTNOY, DAVID S, PIERCY, ANDREW N, MUSICK, JOHN A, BURGESS, GEORGE H, GRAVES, JOHN E

“…To investigate patterns of polyandry in the sandbar shark (Carcharhinus plumbeus), 20 pregnant females were sampled from the western North Atlantic and Gulf of…”
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Ontogenetic changes in the diet of the sandbar shark, Carcharhinus plumbeus, in lower Chesapeake Bay and Virginia (USA) coastal waters Autor Ellis, Julia K, Musick, John A

“…This study describes the diet of the sandbar shark, Carcharhinus plumbeus, highlighting differences in diet within various regions of the Virginia (USA)…”
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Natal homing in juvenile loggerhead turtles (Caretta caretta) Autor BOWEN, BRIAN W., BASS, ANNA L., CHOW, SHAIO-MEI, BOSTROM, MEREDITH, BJORNDAL, KAREN A., BOLTEN, ALAN B., OKUYAMA, TOSHINORI, BOLKER, BENJAMIN M., EPPERLY, SHERYAN, LACASELLA, ERIN, SHAVER, DONNA, DODD, MARK, HOPKINS- MURPHY, SALLY R., MUSICK, JOHN A., SWINGLE, MARK, RANKIN-BARANSKY, KAREN, TEAS, WENDY, WITZELL, WAYNE N., DUTTON, PETER H.

“…Juvenile loggerhead turtles (Caretta caretta) from West Atlantic nesting beaches occupy oceanic (pelagic) habitats in the eastern Atlantic and Mediterranean,…”
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Effective size closely approximates the census size in the heavily exploited western Atlantic population of the sandbar shark, Carcharhinus plumbeus Autor Portnoy, David S, McDowell, Jan R, McCandless, Camilla T, Musick, John A, Graves, John E

“…The sandbar shark, Carcharhinus plumbeus, is a long-lived species with low lifetime fecundity that is heavily fished in the western North Atlantic. Inshore…”
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Reproductive Biology of the Smooth Dogfish, Mustelus canis, in the Northwest Atlantic Ocean Autor Conrath, Christina L., Musick, John A.

“…Shark populations tend to be highly vulnerable to overexploitation due to low fecundity and slow growth rates. Recent fishing pressure on the smooth dogfish in…”
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Food habits of the smooth dogfish, Mustelus canis, dusky shark, Carcharhinus obscurus, Atlantic sharpnose shark, Rhizoprionodon terraenovae, and the sand tiger, Carcharias taurus, from the northwest Atlantic Ocean Autor Gelsleichter, James, Musick, John A., Nichols, Stephanie

“…Diet and feeding habits of the smooth dogfish, Mustelus canis, Atlantic sharpnose, Rhizoprionodon terraenovae, dusky, Carcharhinus obscurus, and the sand…”
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Acoustic pressure and particle motion thresholds in six sciaenid fishes Autor Horodysky, Andrij Z, Brill, Richard W, Fine, Michael L, Musick, John A, Latour, Robert J

“…Sciaenid fishes are important models of fish sound production, but investigations into their auditory abilities are limited to acoustic pressure measurements…”
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The Effect of the El Niño Southern Oscillation on the Reproductive Frequency of Eastern Pacific Leatherback Turtles Autor Vincent S. Saba, Pilar Santidrián-Tomillo, Reina, Richard D., Spotila, James R., Musick, John A., Evans, David A., Paladino, Frank V.

“…1. Pacific leatherback turtle Dermochelys coriacea populations have been declining precipitously. It has been suggested that fishery-associated mortality is…”
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Temporal and Spatial Effects on the Diet of an Estuarine Piscivore, Longnose Gar (Lepisosteus osseus) Autor McGrath, Patrick E., Hilton, Eric J., Musick, John A.

“…Chesapeake Bay is the largest estuary in the USA and comprises vast areas of polyhaline to freshwater, tidal fish habitat. The Bay experiences large…”
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The Effect of the Mesoparasitic Barnacle Anelasma on the Development of Reproductive Organs of Deep-sea Squaloid Sharks, Centroscyllium and Etmopterus Autor Yano, Kazunari, Musick, John A.

“…Specimens of the mesoparasitic barnacle, Anelasma, were found attached to several host deep-sea squaloid sharks, Centroscyllium fabricii from off Greenland,…”
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