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Articles 571 - 600 of 883
Full-Text Articles in Marine Biology
The Chaetognatha Of The Southwestern Gulf Of Mexico During April-May, 1986, Silvia Mille-Pagaza, Jorge Carrillo-Laguna
The Chaetognatha Of The Southwestern Gulf Of Mexico During April-May, 1986, Silvia Mille-Pagaza, Jorge Carrillo-Laguna
Gulf and Caribbean Research
An analysis of the distribution and abundance of Chaetognatha species from the Gulf of Mexico during April–May 1986 is presented. Zooplankton samples were collected at 43 stations from the southwestern and eastern regions of Mexico’s Exclusive Economic Zone in the Gulf of Mexico. Species richness and abundance were higher in the southwestern stations located at the platform slope. The rank of Importance Value (IV) shows 3 groups of species; the first group included Flaccisagitta enflata, Mesosagitta minima, Serratosagitta serratodentata, Krohnitta subtilis, Pterosagitta draco, Sagitta bipunctata, and Krohnitta pacifica which were the most widely distributed …
Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Ix. Geographical Occurrence Of Apseudes Olimpiae Gutu, 1986 With A Review Of Previous Records For The Genus Apseudes In The Gulf, Tom Hansknecht, Richard W. Heard
Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Ix. Geographical Occurrence Of Apseudes Olimpiae Gutu, 1986 With A Review Of Previous Records For The Genus Apseudes In The Gulf, Tom Hansknecht, Richard W. Heard
Gulf and Caribbean Research
Examination of tanaidacean specimens collected from shelf waters of the eastern Gulf of Mexico (Gulf) revealed the presence of the apseudomorph Apseudes olimpiaeGutu, 1986, whose type locality was unknown, but suspected to be Bermuda. It is now determined that the type material actually came from the northeastern Gulf. Although the specific station locality information for the type material has been lost; records indicate that specimens from the Gulf were sent to Romania for study by M. Băcescu and apparently became mixed with material from Bermuda. Based on additional material from the present study, new locality records are established for …
The Influence Of The Pressure Head On The Indonesian Seas Circulation, William H. Burnett, Vladimir M. Kamenkovich, George L. Mellor, Arnold L. Gordon
The Influence Of The Pressure Head On The Indonesian Seas Circulation, William H. Burnett, Vladimir M. Kamenkovich, George L. Mellor, Arnold L. Gordon
Faculty Publications
A high resolution, regional, non-linear, barotropic ocean model (2D POM) was used to show that a pressure difference between the Pacific and Indian Ocean does not significantly influence the total transport of the Indonesian throughflow.
Long-Term Pyrene Exposure Of Grass Shrimp, Palaemonetes Pugio, Affects Molting And Reproduction Of Exposed Males And Offspring Of Exposed Females, Eva Oberdörster, Marius Brouwer, Thea Hoexum-Brouwer, Steve Manning, John A. Mclachlan
Long-Term Pyrene Exposure Of Grass Shrimp, Palaemonetes Pugio, Affects Molting And Reproduction Of Exposed Males And Offspring Of Exposed Females, Eva Oberdörster, Marius Brouwer, Thea Hoexum-Brouwer, Steve Manning, John A. Mclachlan
Faculty Publications
The objective of this study was to investigate the impact of long-term pyrene exposure on molting and reproduction in the model estuarine invertebrate, the grass shrimp (Palaemonetes pugio). Grass shrimp were exposed to measured concentrations of 5.1, 15.0, and 63.4 ppb (mu g/L) pyrene for 6 weeks, during which time we determined molting and survivorship. At the end of the exposure, we immediately sacrificed some of the shrimp for biomarker (CYP1A and vitellin) analyses. The remaining shrimp were used to analyze fecundity and embryo survivorship during an additional 6 weeks after termination of pyrene exposure. Male shrimp at the highest …
Turbidite Megabeds In An Oceanic Rift Valley Recording Jokulhlaups Of Late Pleistocene Glacial Lakes Of The Western United States, G.G. Zuffa, W.R. Normark, F. Serra, Charlotte A. Brunner
Turbidite Megabeds In An Oceanic Rift Valley Recording Jokulhlaups Of Late Pleistocene Glacial Lakes Of The Western United States, G.G. Zuffa, W.R. Normark, F. Serra, Charlotte A. Brunner
Faculty Publications
Escanaba Trough is the southernmost segment of the Gorda Ridge and is filled by sandy turbidites locally exceeding 500 m in thickness. New results from Ocean Drilling Program (ODP) Sites 1037 and 1038 that include accelerator mass spectrometry (AMS) C-14 dates and revised petrographic evaluation of the sediment provenance, combined with high-resolution seismic-reflection profiles, provide a lithostratigraphic framework for the turbidite deposits. Three fining-upward units of sandy turbidites from the upper 365 m at ODP Site 1037 can be correlated with sediment recovered at ODP Site 1038 and Deep Sea Drilling Program (DSDP) Site 35. Six AMS C-14 ages in …
Optical Properties Of The Kara Sea, Donald R. Johnson, Vernon L. Asper, Thomas Mcclimans, Alan D. Weidemann
Optical Properties Of The Kara Sea, Donald R. Johnson, Vernon L. Asper, Thomas Mcclimans, Alan D. Weidemann
Faculty Publications
This study was motivated by the need to understand dispersion processes which affect the redistribution of nuclear wastes in the Arctic from dump sites in the Kara Sea and in the rivers which flow into the Kara Sea. We focus on vertical profiles of light beam transmission and fluorometry made over the delta region fronting the Ob and Yenisey Rivers and over the East Novaya Zemlya Trough (ENZT). The delta region fronting the Ob River Estuary contains a large repository of particles in a dense bottom nepheloid layer with a maximum centered similar to 100 km in front of the …
Oceanic And Neritic Ichthyoplankton At The Edge Of The Continental Shelf In The Southern Gulf Of Mexico, Cesar Flores-Coto, Fernando Flores-Hernandez, Faustino Zavala-Garcia, Virgilio Arenas-Fuentes, Maria Adela Monreal-Gomez, David Alberto Salas-De-Leon
Oceanic And Neritic Ichthyoplankton At The Edge Of The Continental Shelf In The Southern Gulf Of Mexico, Cesar Flores-Coto, Fernando Flores-Hernandez, Faustino Zavala-Garcia, Virgilio Arenas-Fuentes, Maria Adela Monreal-Gomez, David Alberto Salas-De-Leon
Gulf and Caribbean Research
Oceanic and neritic ichthyoplankton were examined at a single sampling site at the edge of the continental shelf in the southern Gulf of Mexico. Double oblique tows were made with a 60 cm Bongo net fitted with 505 µm mesh netting. Collections were taken every 2 hours over a 24 h period during spring, summer and fall of 1992. Fish larvae were described as either oceanic or neritic depending upon adult lifestage habitat. The larvae of 59 taxa were collected in spring (50 oceanic, 9 neritic), 53 in summer (26 oceanic, 27 neritic) and 55 in fall (22 oceanic, 33 …
Lunar Periodicity And Bioluminescence Of Swarming Odontosyllis Luminosa (Polychaeta: Syllidae) In Belize, Gary R. Gaston, Jennifer Hall
Lunar Periodicity And Bioluminescence Of Swarming Odontosyllis Luminosa (Polychaeta: Syllidae) In Belize, Gary R. Gaston, Jennifer Hall
Gulf and Caribbean Research
Few benthic polychaetes have the notoriety of the bioluminescent “glowworm”, Odontosyllis luminosa San Martin, 1990, that inhabits soft-sediment habitats of the Caribbean. A few nights after a full moon, apparently during most months of the year, a most unusual phenomenon occurs. Female glowworms leave the sediments, swim toward the water surface, and release a bioluminescent egg mass, causing a bright green glow near the water’s surface. The female’s luminescence attracts the males, which also glow briefly. The tiny worm has a bright glow, and viewing it is a favorite pasttime in the Caribbean. Over 50 years ago investigators linked the …
Fecundity Of Litopenaeus Setiferus, Farfantepenaeus Aztecus And F. Duorarum, In The Southwestern Gulf Of Mexico, Martin Perez Velazquez, Adolfo Gracia
Fecundity Of Litopenaeus Setiferus, Farfantepenaeus Aztecus And F. Duorarum, In The Southwestern Gulf Of Mexico, Martin Perez Velazquez, Adolfo Gracia
Gulf and Caribbean Research
Fecundity of white shrimp, Litopenaeus setiferus, brown shrimp, Farfantepenaeus aztecus, and pink shrimp F. duorarum and relationships to gonad weights and total and carapace length were estimated. Ovigerous females were collected in the southern Gulf of Mexico in February, May, August and November 1993. Fecundity was estimated by means of a gravimetric method. The equations relating fecundity to total weight and fecundity to gonad weight were linear in the 3 species. However, an exponential relationship was found between fecundity and carapace length in L. setiferus and F. aztecus. Of the relationships examined, gonad weight was considered a …
Feeding Habits Of Juvenile Lane Snapper Lutjanus Synagris From Mississippi Coastal Waters, With Comments On The Diet Of Gray Snapper Lutjanus Griseus, James S. Franks, Katherine E. Vanderkooy
Feeding Habits Of Juvenile Lane Snapper Lutjanus Synagris From Mississippi Coastal Waters, With Comments On The Diet Of Gray Snapper Lutjanus Griseus, James S. Franks, Katherine E. Vanderkooy
Gulf and Caribbean Research
Stomach contents analysis was used to quantitatively describe the diets of juvenile lane snapper, Lutjanus synagris, and juvenile gray snapper, Lutjanus griseus, from the northern Gulf of Mexico. Juvenile snapper were collected by trawling at two estuarine, deep channel sites in Mississippi coastal waters from September 1996 to January 1997. Lane snapper (n = 53) and gray snapper (n = 12) both consumed a variety of prey organisms, but primary prey were amphipods, decapods (shrimp and crabs), and fishes. The most important prey items for lane snapper based on percent Index of Relative Importance (%IRI) were shrimp remains …
Possible Sustained Effects Of Hurricanes Opal And Erin On The Macrobenthos Of Nearshore Habitats Within The Gulf Islands National Seashore, Chet F. Rakocinski, Sara E. Lecroy, Jerry A. Mclelland, Richard W. Heard
Possible Sustained Effects Of Hurricanes Opal And Erin On The Macrobenthos Of Nearshore Habitats Within The Gulf Islands National Seashore, Chet F. Rakocinski, Sara E. Lecroy, Jerry A. Mclelland, Richard W. Heard
Gulf and Caribbean Research
Possible sustained effects of hurricanes Opal and Erin on the macrobenthos of nearshore habitats of the Florida district of Gulf Islands National Seashore were assessed. Pre-hurricane macrobenthic data originating mainly from a large-scale faunal inventory conducted during 1993 were compared with posthurricane data collected one year after the 1995 disturbances. Nearshore habitats examined included both exposed and protected sand beaches, as well as grassbed and lagoon sites. Within one year after the hurricanes, few faunal effects could be discerned at exposed beach sites, whereas possible faunal effects were apparent in protected nearshore habitats. Abundances of 4 major epifaunal crustacean taxa …
Spatio-Temporal Distribution Of Larval Gobiosoma Bosc In Waters Adjacent To Natural And Altered Marsh-Edge Habitats Of Mississippi Coastal Waters, J. Read Hendon, Mark S. Peterson, Bruce H. Comyns
Spatio-Temporal Distribution Of Larval Gobiosoma Bosc In Waters Adjacent To Natural And Altered Marsh-Edge Habitats Of Mississippi Coastal Waters, J. Read Hendon, Mark S. Peterson, Bruce H. Comyns
Faculty Publications
Larval naked gobies, Gobiosoma bose, were collected monthly from October 1995 to September 1997 by beam plankton trawl from waters adjacent to natural Juncus/Spartina marsh-edge, natural sandy beach and altered Juncus/Spartina marsh-edge habitats in Mississippi coastal waters. Altered marsh habitats consisted of two bulkheaded stations and one stretch of riprap. Abundances were significantly higher in waters adjacent to natural marsh-edge habitats than in those adjacent to altered habitats in year one (P = 0.011), suggesting that the physical nature of alteration may have caused reduced habitat suitability. Abundances also varied seasonally, with summer conditions of high water temperature, increasing tide …
The South American Neritic Copepod Ctenocalanus Heronae Vega-Pérez And Bowman (Calanoida) In The Gulf Of Mexico, With Comments On The Taxonomy Of The Genus, E. Suarez-Morales, A. Leon-Oropeza
The South American Neritic Copepod Ctenocalanus Heronae Vega-Pérez And Bowman (Calanoida) In The Gulf Of Mexico, With Comments On The Taxonomy Of The Genus, E. Suarez-Morales, A. Leon-Oropeza
Gulf and Caribbean Research
A single adult female specimen of the calanoid copepod Ctenocalanus heronaeVega-Pérez and Bowman was collected during a zooplankton survey carried out in February 1997 in Campeche Sound, the central-southeastern portion of the Gulf of Mexico. The taxonomy of the genus Ctenocalanus Giesbrecht is still unclear. Characters used to separate the species have been considered rather subtle. In this paper the taxonomic illustrations of the specimen collected are accompanied by a revision of the taxonomic features commonly used to identify the species. New, previously overlooked characters such as the cephalosome/urosome ratio, the shape of the 5th legs and particularly the …
Relationship Between Pea Crab (Pinnotheres Maculatus) Parasitism And Gonad Mass Of The Bay Scallop (Argopecten Irradians), Paul A.X. Bologna, Kenneth L. Heck Jr.
Relationship Between Pea Crab (Pinnotheres Maculatus) Parasitism And Gonad Mass Of The Bay Scallop (Argopecten Irradians), Paul A.X. Bologna, Kenneth L. Heck Jr.
Gulf and Caribbean Research
We investigated the prevalence of pea crabs (Pinnotheres maculatus) in bay scallops (Argopecten irradians) from 1994 through 1996 in a scallop population from St. Joseph Bay, Florida. We also assessed their impacts on scallop reproductive potential. Our results showed that prevalence in bay scallops varied between 0 and 20% and were extremely low during 1996 (<2%). Comparing Gonadal-Somatic Indices (GSI) between infested and non-infested bay scallops in samples assessed the impact of pinnotherid parasitism. Results showed that GSI was significantly reduced in infested individuals compared to non-infested individuals of the same size range (t12 = 2.3, P <0.04). These results suggest that P. maculatus infestation may lower the reproductive potential of individual scallops, but the low rates of parasitism may only minimally impact the host population.
Comments On "On The Utility And Disutility Of Jebar" - Reply, Mark A. Cane, Vladimir M. Kamenkovich
Comments On "On The Utility And Disutility Of Jebar" - Reply, Mark A. Cane, Vladimir M. Kamenkovich
Faculty Publications
No abstract provided.
Blue Crab Larval Dispersion And Retention In The Mississippi Bight, Donald R. Johnson, Harriet M. Perry
Blue Crab Larval Dispersion And Retention In The Mississippi Bight, Donald R. Johnson, Harriet M. Perry
Faculty Publications
A conceptual hypothesis relating physical forcing to dispersion and retention was developed for blue crab larvae within the Mississippi Eight. The spawning period for blue crabs in the northern Gulf of Mexico is protracted. Hatching of eggs occurs near the barrier islands and mouths of coastal bays from March through October. Larvae are released on ebbing tides and spend the next 30 to 50 d offshore where they develop through seven zoeal stages before undergoing metamorphosis to megalopae. Duration of the megalopal stage is variable but generally persists from 6 to 20 d. Blue crabs recruit to Gulf estuaries as …
Age And Growth Of Cobia, Rachycentron Canadum, From The Northeastern Gulf Of Mexico, James S. Franks, James R. Warren, Michael V. Buchanan
Age And Growth Of Cobia, Rachycentron Canadum, From The Northeastern Gulf Of Mexico, James S. Franks, James R. Warren, Michael V. Buchanan
Faculty Publications
We examined 1005 cobia, Rachycentron canadum, from recreational catches in the northeastern Gulf of Mexico from 1987 to 1995. Specimens ranged from 325 to 1651 mm fork length (FL); females had a mean FL of 1050 mm (n=730) and were significantly larger than males that had a mean FL of 952 mm (n=275). The over all male to female ratio was 1:2.7. Ages of 565 cobia were estimated from thin-sectioned otoliths (sagittae). Marginal-increment analysis of sagittal otoliths showed a single annual minimum during June. Male cobia (n=170; 525-1330 mm FL) ranged from age 0 to 9, and females (n=395; 493-1651 …
Local Data Assimilation In The Estimation Of Barotropic And Baroclinic Open Boundary Conditions, Igor Shulman, James K. Lewis, John G. Mayer
Local Data Assimilation In The Estimation Of Barotropic And Baroclinic Open Boundary Conditions, Igor Shulman, James K. Lewis, John G. Mayer
Faculty Publications
The problem of data assimilation in the specification of open boundary conditions for limited area models is addressed in this paper. Optimization approaches are detailed, which are based on combining available data on an open boundary with the physics of the hydrodynamical model. In our case the physics is in terms of the flux of energy through the open boundary. These optimized boundary conditions, for both barotropic and baroclinic situations, interpreted physically as special Linearizations of the Bernoulli equation for each normal mode. Because of the complexity of decomposing variables into normal modes for open boundaries with varying bathymetry, we …
Particle Fluxes During Austral Spring And Summer In The Southern Ross Sea, Antarctica, Vernon L. Asper, Walker O. Smith Jr.
Particle Fluxes During Austral Spring And Summer In The Southern Ross Sea, Antarctica, Vernon L. Asper, Walker O. Smith Jr.
Faculty Publications
The flux of particles from the euphotic zone through 200 m was investigated on the Ross Sea continental shelf during two cruises, the first in November-December 1994 and the second in December 1995 and January 1996. An assessment of surface layer phytoplankton biomass and productivity was made simultaneously. Particle flux was measured using floating sediment traps whose collection efficiency was assessed rigorously. Phytoplankton biomass and productivity increased rapidly in November-December, and biomass was maximal in mid-December. Thereafter productivity appeared to decline substantially. Biomass declined as well, but mot as rapidly as productivity. Vertical flux rates were low early in the …
Gordon Pennington Gunter, 1909-1998, W. David Burke
Gordon Pennington Gunter, 1909-1998, W. David Burke
Gulf and Caribbean Research
Memorial of Gordon Gunter, former director of the Gulf Coast Research Laboratory and the first editor of Gulf Research Reports.
Effects Of Diflubenzeron On The Ontogeny Of Phototaxis By Palaemonetes Pugio, J.E.H. Wilson, R.B. Forward Jr., J.D. Costlow
Effects Of Diflubenzeron On The Ontogeny Of Phototaxis By Palaemonetes Pugio, J.E.H. Wilson, R.B. Forward Jr., J.D. Costlow
Gulf and Caribbean Research
The phototaxis by larvae of the grass shrimp Palaemonetes pugio that hatched from embryos which were exposed to a single pulse concentration of diflubenzuron (DFB; Dimilin®) was quantified. Stage IV embryos (6-day-old) were exposed to 0.5 µg/L of DFB for 4 days followed by transfer into clean seawater for the rest of the incubation period. The photoresponses of light-adapted larvae from untreated embryos and embryos treated with 0.5 µg/L DFB were monitored from 1 day through 8 day post hatch for phototactic responses to 500 nm light. Larvae from untreated embryos exhibited strong positive phototaxis at high light intensities (3 …
A Survey Of The Reef-Related Medusa (Cnidaria) Community In The Western Caribbean Sea, E. Suarez-Morales, L. Segura-Puertas, R. Gasca
A Survey Of The Reef-Related Medusa (Cnidaria) Community In The Western Caribbean Sea, E. Suarez-Morales, L. Segura-Puertas, R. Gasca
Gulf and Caribbean Research
The species composition, distribution, and abundance of medusae collected during a 4-day plankton survey in a reef system of the Mexican Caribbean were studied. Highest mean medusae abundance was observed over the fore-reef zone and in daytime samples. Lowest abundances occurred in the reef lagoon and at dusk. Seventeen species were identified, with Liriope tetraphylla, Aglaura hemistoma, Cubaia aphrodite, and Sarsia prolifera being the most abundant. They belong to a group of medusae dominant along the world's second largest barrier reef. Cluster analysis revealed primary (fore-reef) and secondary (reef lagoon, channel) oceanic groups, showing the strong oceanic …
An Annotated Checklist And Key To Hermit Crabs Of Tampa Bay, Florida, And Surrounding Waters, Karen M. Strasser, W. Wayne Price
An Annotated Checklist And Key To Hermit Crabs Of Tampa Bay, Florida, And Surrounding Waters, Karen M. Strasser, W. Wayne Price
Gulf and Caribbean Research
Fourteen species of hermit crabs, belonging to 5 genera, were identified from 35 stations in Tampa Bay and adjacent continental shelf waters. Ninety-two samples were taken from the intertidal zone to 15 m with a variety of gear including dip nets, trawls, dredges, and hand collections using SCUBA. Pagurus maclaughlinae, Pagurus longicarpus, and Pagurus pollicaris were distributed throughout the bay. These species were often sympatric, and were commonly found in seagrass beds, sandy substrates, and sand/mud substrates, respectively. Clibanarius vittatus, Pagurus gymnodactylus, and Pagurus stimpsoni inhabited the higher salinity waters of the bay entrance. Paguristes sp., …
The Planktonic Copepods Of Coastal Saline Ponds Of The Cayman Islands With Special Reference To The Occurrence Of Mesocyclops Ogunnus Onabamiro, An Apparently Introduced Afro-Asian Cyclopoid, Eduardo Suarez-Morales, Jerry A. Mclelland, Janet Reid
The Planktonic Copepods Of Coastal Saline Ponds Of The Cayman Islands With Special Reference To The Occurrence Of Mesocyclops Ogunnus Onabamiro, An Apparently Introduced Afro-Asian Cyclopoid, Eduardo Suarez-Morales, Jerry A. Mclelland, Janet Reid
Gulf and Caribbean Research
Taxonomic analysis of the copepod specimens collected from 29 Cayman Island ponds revealed the presence of ten species including the nearly ubiquitous cyclopoid Apocyclops panamensis. This species was widespread throughout the islands, being collected at 27 of the sampling sites. Another common calanoid, Mastigodiaptomus nesus, occurred at nine sites on Grand Cayman and one on Cayman Brac. A cyclopoid of Afro-Asian origin, Mesocyclops ogunnus, was collected at two nearly fresh water sites on Grand Cayman and was considered to be a recent introduction. Because of its known adaptability to fluctuating environmental conditions, it is likely that M. …
Gulf Estuarine Research Society Spring 1999 Meeting Abstracts
Gulf Estuarine Research Society Spring 1999 Meeting Abstracts
Gulf and Caribbean Research
Meeting abstracts from the Spring 1999 meeting of the Gulf Estuarine Research Society.
Atlas Of Fishes Of The St. Louis Bay Drainage In Southern Mississippi, Royal D. Suttkus, David A. White, Maurice F. Mettee
Atlas Of Fishes Of The St. Louis Bay Drainage In Southern Mississippi, Royal D. Suttkus, David A. White, Maurice F. Mettee
Gulf and Caribbean Research
This atlas presents a comprehensive report on fishes collected in the St. Louis Bay drainage between October 1950 and October 1989, prior to several recent years of accelerated commercial and residential development. A total of 261 samples taken at 126 sites from headwaters of major streams to the mouth of St. Louis Bay resulted in the collection of 75,625 specimens representing 124 species plus 2 hybrid sunfish combinations. Precise locality data are given for each collection site, with number of species and specimens taken at each site, followed by a total list of species taken at each site. A distribution …
Recent Trends In Water Clarity Of Lake Pontchartrain, J.C. Francis, M.A. Poirrier
Recent Trends In Water Clarity Of Lake Pontchartrain, J.C. Francis, M.A. Poirrier
Gulf and Caribbean Research
An analysis of Secchi disk transparency observations from 3 sites on the Lake Pontchartrain Causeway indicates that water clarity has increased at the north shore and mid-lake sites, but has not changed at the south shore site. Louisiana Department of Environmental Quality data from 1986 through 1995 were used in the analysis. Further analysis indicates that the increased transparency was not caused by changes in salinity or wind speed. The best explanation for the observed increase is the cessation of shell dredging in 1990.
Parasitization Of Callinectes Rathbunae And Callinectes Sapidus By The Rhizocephalan Barnacle Loxothylacus Texanus In Alvarado Lagoon, Veracruz, Mexico, Fernando Alvarez, Adolfo Gracia, Rafael Robles, Jorge Calderon
Parasitization Of Callinectes Rathbunae And Callinectes Sapidus By The Rhizocephalan Barnacle Loxothylacus Texanus In Alvarado Lagoon, Veracruz, Mexico, Fernando Alvarez, Adolfo Gracia, Rafael Robles, Jorge Calderon
Gulf and Caribbean Research
Callinectes rathbunae and CalIinectes sapidus in Alvarado Lagoon, Mexico, were sampled monthly for one year to determine the extent of parasitization by the rhizocephalan cirripede Loxothylacus texanus. Prevalence levels. host sex ratio, carapace width-weight variation, and distribution of the number of parasites among hosts were analyzed. Loxothylacus texanus was present almost exclusively in C. rathbunae with a mean prevalence of 7.58%, while less than 1% of all C. sapidus were parasitized. Callinectes rathbunae constitutes a new host record for this parasite. A study of infection revealed significant variation in prevalence and host size throughout the study period. The sex …
Variations In The Ventral Ciliature Of The Crustacean Symbiont Hyalophysa (Ciliophora, Apostomatida) From Mobile Bay And Dauphin Island, Alabama, Stephen C. Landers, Michael A. Zimlich, Tom Coate
Variations In The Ventral Ciliature Of The Crustacean Symbiont Hyalophysa (Ciliophora, Apostomatida) From Mobile Bay And Dauphin Island, Alabama, Stephen C. Landers, Michael A. Zimlich, Tom Coate
Gulf and Caribbean Research
Apostome ciliates are symbiotic organisms whose life cycles are complex and involve specific feeding, divisional, migratory, and phoretic stages. In this study we examined apostome trophonts (the diagnostic stage) from a variety of crustacean hosts in the Mobile Bay and Dauphin Island, Alabama, area. The hosts were grass shrimp (Palaemonetes pugio and P. paludosus), striped hermit crab (Clibanarius vittatus), blue crab (Callinectes sapidus), and pink shrimp (Farfantepenaeus (=Penaeus) duorarum). A number of similar but distinct morphotypes of apostomes were present, those corresponding to descriptions of species of Hyalophysa as well …
Optimized Boundary Conditions And Data Assimilation With Application To The M-2 Tide In The Yellow Sea, Igor Shulman, James K. Lewis, Alan F. Blumberg, B. Nicholas Kim
Optimized Boundary Conditions And Data Assimilation With Application To The M-2 Tide In The Yellow Sea, Igor Shulman, James K. Lewis, Alan F. Blumberg, B. Nicholas Kim
Faculty Publications
An optimization approach is derived for assimilating tidal height information along the open boundaries of a numerical model. The approach is then extended so that similar data along transects inside a model domain can also be optimally assimilated. To test the application of such an optimized methodology, M-2 tidal simulations were conducted with a numerical ocean model of the Yellow Sea, an area with a strong tidal influence. The use of the optimized open boundary conditions and internal data assimilation leads to a significant improvement of the predictive skill of the model. Average errors can be reduced by up to …