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A New Genus And Species Of Sphaeromatidae (Crustacea: Isopoda) With Experiments And Observations On Its Reproductive Biology, Interspecific Interactions And Color Polymorphisms, Leo W. Buss, Ernest W. Iverson Sep 1981

A New Genus And Species Of Sphaeromatidae (Crustacea: Isopoda) With Experiments And Observations On Its Reproductive Biology, Interspecific Interactions And Color Polymorphisms, Leo W. Buss, Ernest W. Iverson

Postilla

The new genus, Paraleptosphaeroma, is distinguished from the morphologically similar genus Leptosphaeroma by the fusion of the pleonites, the shape of the peni, the attachment of appendix masculina, and the presence or the absence of an endopod on the first pleopod. The term cingula is introduced to refer to lateral margins fringed with setae and the distinction is drawn between setal and membranous forms of the cingula. Paraleptsphaeroma glynni (sp nov.) occurs on cobble in tidal pools and is associated with three sessile species, two bryozoans and a coralline alga. Experiments demonstrate the isopod to be a sequential hermaphrodite with …

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Age Of Individuals And Family Composition As Factors Underlying The Distribution Of Personal Income, T. Paul Schultz Sep 1981

Age Of Individuals And Family Composition As Factors Underlying The Distribution Of Personal Income, T. Paul Schultz

Discussion Papers

No abstract provided.

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Evaluation Of The Olsen Technique For Estimating The Fertility Response To Child Mortality, James Trussell, Randall Olsen Aug 1981

Evaluation Of The Olsen Technique For Estimating The Fertility Response To Child Mortality, James Trussell, Randall Olsen

Discussion Papers

No abstract provided.

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Fertility, Child Schooling, And Exogenous Mortality: A Waiting Time Regression With Dynamic Regressors, Randall Olsen, Kenneth Wolpin May 1981

Fertility, Child Schooling, And Exogenous Mortality: A Waiting Time Regression With Dynamic Regressors, Randall Olsen, Kenneth Wolpin

Discussion Papers

No abstract provided.

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Investment In Child Nutrition And Women’S Allocation Of Time In Developing Countries, David M. Blau Mar 1981

Investment In Child Nutrition And Women’S Allocation Of Time In Developing Countries, David M. Blau

Discussion Papers

No abstract provided.

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Specification Biases In Estimating The Influence Of Child Mortality On Fertility, Bun Song Lee, T. Paul Schultz Feb 1981

Specification Biases In Estimating The Influence Of Child Mortality On Fertility, Bun Song Lee, T. Paul Schultz

Discussion Papers

No abstract provided.

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On The Dynamics Of Equatorial Outflows With Application To The Amazon's Basin, Doron Nof Jan 1981

On The Dynamics Of Equatorial Outflows With Application To The Amazon's Basin, Doron Nof

Journal of Marine Research

A simplified model is considered in order to describe the dynamics of outflows of rivers or sea straits located at or near the equator. The model is steady, frictionless aod nondiffusive but the motions are not constrained to be quasigeostrophic. The geometry of the oceanic basin into which the outflow debouches is approximated by a wedge and the vertical structure of the flow is represented by two layers of different densities. Approximate solutions to the potential vorticity equation and the Bernoulli integral are obtained analytically....

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Dynamic Topography Of The Sea Surface In The Equatorial Atlantic, Eli Joel Katz Jan 1981

Dynamic Topography Of The Sea Surface In The Equatorial Atlantic, Eli Joel Katz

Journal of Marine Research

From historic meridional sections of the central equatorial Atlantic it is shown that the dynamic sea surface topography varies extensively during the year….

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Phosphorus-Cadmium Cycling In Northeast Pacific Waters, George A. Knauer, John H. Martin Jan 1981

Phosphorus-Cadmium Cycling In Northeast Pacific Waters, George A. Knauer, John H. Martin

Journal of Marine Research

The vertical distributions of dissolved and particulate Cd and PO4 were determined in water samples collected off the central California coast. The same elements, plus carbon, were also measured in passively sinking particulates that were caught in particle interceptor traps set at depths of 35, 65, 150, 500, 750, and 1500 m....

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Dispersion, Feeding Behavior And Competition In Two Spionid Polychaetes, Lisa Ann Levin Jan 1981

Dispersion, Feeding Behavior And Competition In Two Spionid Polychaetes, Lisa Ann Levin

Journal of Marine Research

Spatial analysis, laboratory and field experiments, and feeding observations indicate contrasting patterns of aggression in the polychaetes Pseudopolydora paucibranchiata (Okuda) and Streblospio benedicti (Webster) and provide the first evidence of territoriality in a spionid polychaete (Pseudopolydora)....

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15n Tracer Studies Of The Primary Nitrite Maximum, Robert J. Olson Jan 1981

15n Tracer Studies Of The Primary Nitrite Maximum, Robert J. Olson

Journal of Marine Research

15N tracers were used in sub-tropical and Antarctic waters to study the production of nitrite from nitrate and ammonia, and the uptake of nitrate and ammonia. It was found that ammonia was the predominant source of nitrite in the primary nitrite maximum in sub-tropical waters and in the Ross Sea in summer, while nitrate and ammonia were both important in the Scotia Sea in early spring....

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Differential Photoinhibition Of Marine Nitrifying Bacteria: A Possible Mechanism For The Formation Of The Primary Nitrite Maximum, Robert J. Olson Jan 1981

Differential Photoinhibition Of Marine Nitrifying Bacteria: A Possible Mechanism For The Formation Of The Primary Nitrite Maximum, Robert J. Olson

Journal of Marine Research

15N-tracer experiments using natural populations of marine nitrifying bacteria revealed photoinhibition of nitrite- and ammonia-oxidizing activity at light intensities less than 1% of sunlight. Nitrite oxidation was more sensitive to light than was ammonia oxidation. Calculations of biologically effective dose rates suggest that the depths at which ammonia oxidation exceeds nitrite oxidation are consistent with the depths of observed primary nitrite maxima in subtropical waters.

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Variability Of The Flow Through The Strait Of Belle Isle, Christopher Garrett, Bechara Toulany Jan 1981

Variability Of The Flow Through The Strait Of Belle Isle, Christopher Garrett, Bechara Toulany

Journal of Marine Research

For periods between about two days and one month the surface flow through the Strait of Belle Isle, represented by the sea level difference across it, is highly coherent with the large scale atmospheric pressure gradient normal to the strait. This suggests that the flow is driven by a sea level difference between opposite ends of the strait induced by large scale winds....

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Baroclinic Transport In The Gulf Of Alaska Part Ii. A Fresh Water Driven Coastal Current, Thomas C. Royer Jan 1981

Baroclinic Transport In The Gulf Of Alaska Part Ii. A Fresh Water Driven Coastal Current, Thomas C. Royer

Journal of Marine Research

A coastal geostrophic, baroclinic jet in the Gulf of Alaska is driven seasonally by fresh water discharge and winds. The narrow current (<20 km) has a mean transport of 0.24 × 106 m3 s-1 (relative to 100 db) and velocities in excess of 66 cm s-1. The jet reaches a maximum in autumn, coincident with maximum fresh water discharge along the coast....

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Spatial And Temporal Patterns Of Dissolved Ammonium, Manganese, And Silica Fluxes From Bottom Sediments Of Long Island Sound, U.S.A., Robert C. Aller, Larry K. Benninger Jan 1981

Spatial And Temporal Patterns Of Dissolved Ammonium, Manganese, And Silica Fluxes From Bottom Sediments Of Long Island Sound, U.S.A., Robert C. Aller, Larry K. Benninger

Journal of Marine Research

The flux of dissolved NH4+, Mn++, and Si(OH)4 from bottom sediments was measured directly at 14 stations throughout central and western Long Island Sound, U.S.A….

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Do Oceanic Zooplankton Aggregate At, Or Near, The Deep Chlorophyll Maximum?, Alan R. Longhurst, Alex W. Herman Jan 1981

Do Oceanic Zooplankton Aggregate At, Or Near, The Deep Chlorophyll Maximum?, Alan R. Longhurst, Alex W. Herman

Journal of Marine Research

Grazing pressure, varying with depth, must play a role in shaping the general form of the chlorophyll profile which often contains a deep chlorophyll maximum (DCM). Until we obtain enough coincident high-precision profiles of chlorophyll and grazing plankton (such as the BATFISH profiles, discussed below) it is difficult to be sure that this is so, though the problem is important enough to warrant an attempt, and several have been made....

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Cupric Ion Activity And The Growth Of Phytoplankton Clones Isolated From Different Marine Environments, Jerome Gavis, Robert R.L. Guillard, Bonnie L. Woodward Jan 1981

Cupric Ion Activity And The Growth Of Phytoplankton Clones Isolated From Different Marine Environments, Jerome Gavis, Robert R.L. Guillard, Bonnie L. Woodward

Journal of Marine Research

The responses to {Cu++} (free cupric ion activity) of 24 clones of 11 species of marine phytoplankton in 4 algal classes were studied in a Cu-Tris buffered medium with a fluorometric method of measuring acclimated growth rates….

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Oceanic Co2 Increase In Baffin Bay, E. P. Jones, E. M. Levy Jan 1981

Oceanic Co2 Increase In Baffin Bay, E. P. Jones, E. M. Levy

Journal of Marine Research

Measurements of the total inorganic carbon in the water of Baffin Bay are interpreted to reflect increases in atmospheric carbon dioxide due to fossil fuel combustion. The increases are indicated by differences at various depths in the alkalinity and total inorganic carbon values after correction for calcium carbonate dissolution and decay of organic matter. These differences are comparable to the changes reported for GEOSECS Atlantic and Pacific Stations.

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Sediment Destabilization By Animal Tubes, James E. Eckman, Arthur R.M. Nowell, Peter A. Jumars Jan 1981

Sediment Destabilization By Animal Tubes, James E. Eckman, Arthur R.M. Nowell, Peter A. Jumars

Journal of Marine Research

Laboratory flume ex periments we re conducted in order to test the influence on sediment e rodibility of varying densities of the tube-building polychaete worm Owenia fusiformis. Experiments were performed on isolated individuals, in order to measure approximate spatial limits of isolated tube effects, and on arrays of individuals at densities reported previously to be associated with stable beds....

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Nutrition And Food Limitation Of Deposit-Feeders. I. The Role Of Microbes In The Growth Of Mod Snails (Hydrobiidae), Jeffrey S. Levinton, Thomas S. Bianchi Jan 1981

Nutrition And Food Limitation Of Deposit-Feeders. I. The Role Of Microbes In The Growth Of Mod Snails (Hydrobiidae), Jeffrey S. Levinton, Thomas S. Bianchi

Journal of Marine Research

A series of laboratory microcosm experiments demonstrate that somatic growth of the deposit-feeding gastropod, Hydrobia totteni, is related strongly to microalgal standing stock. Microalgal standing stock is, in turn, determined by the relative rates of grazing and recovery....

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Phytoplankton Growth In Nutrient Rich Seawater: Importance Of Copper-Manganese Cellular Interactions, William G. Sunda, Richard T. Barber, Susan A. Huntsman Jan 1981

Phytoplankton Growth In Nutrient Rich Seawater: Importance Of Copper-Manganese Cellular Interactions, William G. Sunda, Richard T. Barber, Susan A. Huntsman

Journal of Marine Research

Matrix experiments were conducted to determine the role of trace metals in limiting phytoplankton growth rate in seawater collected from the deep nitrate maximum (800 m, 25 µM nitrate) off the North Carolina coast. Additions of FeCI3, MnCI2, and chelators (EDTA and NTA) stimulated the growth of unialgal cultures of Chaetoceros socialis or of a natural phytoplankton community inoculated into this seawater....

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Physical Origins Of Georges Bank Water, T. S. Hopkins, N. Garfield Iii Jan 1981

Physical Origins Of Georges Bank Water, T. S. Hopkins, N. Garfield Iii

Journal of Marine Research

The seasonal behavior of the Georges Bank Water mass is described from the context of the historic National Oceanographic Data Center file (1910-1978). The Georges Bank Water is defined as the water type most commonly found in the top 40 m of water within the 65 m isobath. Plots of its distribution show it unique within the Georges Bank/Gulf of Maine region....

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Nutrition And Food Limitation Of Deposit-Feeders. Ii. Differential Effects Of Hydrobia Totteni And Ilyanassa Obsoleta On The Microbial Community, Thomas S. Bianchi, Jeffrey S. Levinton Jan 1981

Nutrition And Food Limitation Of Deposit-Feeders. Ii. Differential Effects Of Hydrobia Totteni And Ilyanassa Obsoleta On The Microbial Community, Thomas S. Bianchi, Jeffrey S. Levinton

Journal of Marine Research

We examined the effects of the mud snails Hydrobia totteni and Ilyanassa obsoleta on microbial communities of sediments in microcosms. Varying density of Hydrobia, and the presence of Ilyanassa, exerted no effect on steady state bacterial standing stock. This is probably related to the rapid recovery rate of bacteria, despite efficient grazing....

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Simulation Of A Storm Event In Marine Microcosms, Candance A. Oviatt, Carlton D. Hunt, Gabriel A. Vargo, Kevin W. Kopchynski Jan 1981

Simulation Of A Storm Event In Marine Microcosms, Candance A. Oviatt, Carlton D. Hunt, Gabriel A. Vargo, Kevin W. Kopchynski

Journal of Marine Research

A storm of moderate intensity and lasting for 14 hours was simulated in three of the Marine Ecosystems Research Laboratory (MERL) microcosms by increasing the intensity of microcosm mixing. The simulation resuspended ~0.3 cm of sediment and increased suspended particulate loads by 2 orders of magnitude. Concurrently, the concentrations of metals and nutrients increased in the water column....

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The Response Of A Linear Baroclinic Equatorial Ocean To Periodic Forcing, Mark A. Cane, E. S. Sarachik Jan 1981

The Response Of A Linear Baroclinic Equatorial Ocean To Periodic Forcing, Mark A. Cane, E. S. Sarachik

Journal of Marine Research

This paper examines the response of the linear inviscid shallow water equations on a meridionally infinite but zonally bounded equatorial β-plane to periodic zonal forcings at a low frequency ω….

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Forced Standing Equatorial Ocean Wave Modes, Peter R. Gent Jan 1981

Forced Standing Equatorial Ocean Wave Modes, Peter R. Gent

Journal of Marine Research

Standing equatorial wave modes are shown to be exact solutions of the forced, linear, inviscid shallow water equations when the forcing is zonally uniform and at a single frequency. If the forcing is equatorially confined in the meridional direction, then so is the directly forced response and the standing mode does not lealr. energy away from the equator....

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Evidence For Wind-Forced Circulation In The Gulf Of Mexico, John Blaha, Wilton Sturges Jan 1981

Evidence For Wind-Forced Circulation In The Gulf Of Mexico, John Blaha, Wilton Sturges

Journal of Marine Research

A study is conducted into the response of sea level and dynamic height to fluctuations of alongshore wind stress and wind stress curl at periods greater than a few months per cycle….

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Geomorphology And Community Composition Of Two Adjacent Reef Areas, Discovery Bay, Jamaica, W. David Liddell, Sharon L. Ohlhorst Jan 1981

Geomorphology And Community Composition Of Two Adjacent Reef Areas, Discovery Bay, Jamaica, W. David Liddell, Sharon L. Ohlhorst

Journal of Marine Research

The north coast of Jamaica possesses a highly variable topography which reflects tectonic displacement of Pleistocene rock units. Holocene reef development is intimately related to the underlying Pleistocene rocks and reflects such variation in basement morphology. Underwater surveys have established that two adjacent reef areas, the East and West Fore Reefs at Discovery Bay, Jamaica, exhibit contrasting bottom profiles which are due to differential offset of the underlying Pleistocene shelf carbonates....

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Disturbance And Community Structure: An Experimental Study Of Bioturbation In Marine Soft-Bottom Environments, G. A. Brenchley Jan 1981

Disturbance And Community Structure: An Experimental Study Of Bioturbation In Marine Soft-Bottom Environments, G. A. Brenchley

Journal of Marine Research

Bioturbators alter the sediment surface in the following ways: by depositing sediment on the surface in the form of feces or in the process of tunnelling, and by transporting sediment about the surface while feeding or while burrowing….

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Grazing By Diadema Antillarum (Philippi) And Its Effects On The Benthic Algal Community, Robert C. Carpenter Jan 1981

Grazing By Diadema Antillarum (Philippi) And Its Effects On The Benthic Algal Community, Robert C. Carpenter

Journal of Marine Research

Field observations in St. Croix, U.S. Virgin Islands and Discovery Bay, Jamaica reveal that Diadema antillarum Philippi has a strong feeding preference for algal turf. Seasonally reduced abundance of this preferred food item was accompanied by the utilization of an alternate food resource (live coral) in concurrence with optimal foraging theory predictions....

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