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On The Upwelling Circulation Over The Wide Shelf Off Peru: 2. Vertical Velocities, Internal Mixing And Heat Balance, Gary Shaffer
On The Upwelling Circulation Over The Wide Shelf Off Peru: 2. Vertical Velocities, Internal Mixing And Heat Balance, Gary Shaffer
Journal of Marine Research
An analysis is presented of the mean coastal upwelling circulation over the wide shelf off Peru based on the current and temperature profiling measurements described in Shaffer (1982). The natural coordinate conservation method (NCCM) in temperature (T) space is applied to boxes formed from stations along two lines with 60 km alongshore separation. Mean distributions in x (cross-shelf coordinate) and T are obtained for diapycnal advection and mixing. The vertical component of isopycnal flow is also calculated and found to be considerably less than vertical, diapycnal flow in this region of strong upwelling and internal mixing.Richardson numbers ( …
Effect Of Physical Disturbance On Population Dynamics And Trophic Interactions Among Microbes And Meiofauna, Daniel M. Alongi
Effect Of Physical Disturbance On Population Dynamics And Trophic Interactions Among Microbes And Meiofauna, Daniel M. Alongi
Journal of Marine Research
A series of laboratory experiments was conducted to assess the effects of physical disturbance of surface sediments on trophic interactions among bacteria, protozoa and meiofauna. Bacteria, zooflagellates, and populations of the hypotrich ciliate Aspidisca sp. and the nematode Diplolaimella chitwoodi were, at most sampling periods, not significantly affected by small-scale, daily disturbances. However, populations of the epibenthic harpacticoid copepod Tisbe holothuriae became disproportionately abundant in disturbed cultures.Bacterial numbers, growth rates and doubling times were affected little by the presence of meiofauna. The response of zooflagellates was not clear; populations of the ciliate Aspidisca sp. were, at most sampling intervals, significantly …
Habitat Dimensions Of Calanoid Copepods In The Western Gulf Of Mexico, James A. Cummings
Habitat Dimensions Of Calanoid Copepods In The Western Gulf Of Mexico, James A. Cummings
Journal of Marine Research
The vertical distributions of 49 species (53 taxa) of calanoid copepods were determined in cyclonic and anticyclonic hydrographic features in the western Gulf of Mexico for three seasons of the year. The relative intensities of the features varied among seasons, while within seasons the physical structure between features was different. Since the same copepod species were present in both features for all seasons sampled, the contrasting hydrography provided a natural experiment in which to study the mechanisms, biological or physical, acting to influence species vertical distribution patterns. Hierarchial classification analysis revealed that groups of samples characterized by relatively homogeneous biotic …
A Comparison Of Moored And Free-Drifting Sediment Traps Of Two Different Designs, Nick Staresinic, Klaus Von Bröckel, Nenad Smodlaka, C. Hovey Clifford
A Comparison Of Moored And Free-Drifting Sediment Traps Of Two Different Designs, Nick Staresinic, Klaus Von Bröckel, Nenad Smodlaka, C. Hovey Clifford
Journal of Marine Research
The Kiel conical sediment trap and a 3:1 right cylinder were simultaneously deployed in both free-drifting and moored modes on four separate occasions over the Peruvian shelf in order to compare downward flux measurements derived from each….
Daily Patterns Of Fluorescence In Vivo In The Central Equatorial Pacific, Patrick J. Setser, Norman L. Guinasso Jr., David R. Schink
Daily Patterns Of Fluorescence In Vivo In The Central Equatorial Pacific, Patrick J. Setser, Norman L. Guinasso Jr., David R. Schink
Journal of Marine Research
A daily cycle of fluorescence in vivo was strikingly apparent in surface waters of the central equatorial Pacific between latitudes 4N and 10S, but not in waters to the north or south of this zone. These changes in fluorescence did not represent changes in chlorophyll-a concentration, but rather a photoinhibition of fluorescence by ambient light. Higher nutrient and chlorophyll-a concentrations were found in the region where cycling occurred....
Large-Scale Interannual Physical And Biological Interaction In The California Current, Dudley B. Chelton, Patricio A. Bernal, John A. Mcgowan
Large-Scale Interannual Physical And Biological Interaction In The California Current, Dudley B. Chelton, Patricio A. Bernal, John A. Mcgowan
Journal of Marine Research
Thirty years of temperature, salinity, steric height and zooplankton data are examined to explore the potential causes of large-scale biological variability in the California Current. The physical and biological properties are all found to be dominated by a pronounced interannual signal with very large spatial scale....
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
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 …
The Influence Of Adults On The Settlement Of Spat Of The Clam, Tapes Japonica, John G. Williams
The Influence Of Adults On The Settlement Of Spat Of The Clam, Tapes Japonica, John G. Williams
Journal of Marine Research
Substratum abundances of adult Manila clams (Tapes japonica) were manipulated in July 1976 on a portion of a beach located in the southern region of Puget Sound, Washington. Differences in larval settlement of clam spat were measured between samples taken from substra ta having different abundances of adult clams....
Patterns Of Resource Utilization And Coexistence In Marine Intertidal Deposit-Feeding Communities, Robert B. Whitlatch
Patterns Of Resource Utilization And Coexistence In Marine Intertidal Deposit-Feeding Communities, Robert B. Whitlatch
Journal of Marine Research
Patterns of foraging and distribution of 19 species of infauna! deposit-feeding annelids are described from several intertidal soft-substratum habitats. Two major feeding groups were recognized: surface and sub-surface foragers. In both feeding groups, between-habitat species richness was positively correlated with food-resource supplies in sediments....
Bioerosion By Two Rock Boring Echinoids (Echinometra Mathaei And Echinostrephus Aciculatus) On Enewetak Atoll, Marshall Islands, Anthony R. Russo
Bioerosion By Two Rock Boring Echinoids (Echinometra Mathaei And Echinostrephus Aciculatus) On Enewetak Atoll, Marshall Islands, Anthony R. Russo
Journal of Marine Research
Bioerosion can be important to the configuration and destruction of coral reefs. Echinoids as grazers and burrowers can contribute significantly to coral reef erosion. Studies done on the turnover of gut contents of the two major burrowing echinoids on Enewetak atoll (Echinometra mathaei and Echinostrephus aciculatus) show a range of total CaCO2 erosion by both species from 80-325 g m-2 y-1....
Small-Scale Patterns And Processes In A Soft-Substratum, Intertidal Community, James E. Eckman
Small-Scale Patterns And Processes In A Soft-Substratum, Intertidal Community, James E. Eckman
Journal of Marine Research
Experimental manipulations and direct observations were combined to study small-scale dispersion patterns and their causes in an intertidal sand-flat community numerically dominated by sessile and sedentary tube dwellers. Individuals of several species exhibited gregariousness at scales as small as one centimeter. Experiments in which needles were placed in sediments to simulate animal tubes suggested that organisms are affected by patterns of flow which change over distances of several millimeters to a centimeter.
Nepal Studies Association Bulletin, Nos. 16-17, Nepal Studies Association, Donald A. Messerschmidt
Nepal Studies Association Bulletin, Nos. 16-17, Nepal Studies Association, Donald A. Messerschmidt
Nepal Studies Association Newsletter
No abstract provided.
Vertical Variation In Particulate Matter In The Upper Twenty Centimeters Of Marine Sediments, Ralph Gordon Johnson
Vertical Variation In Particulate Matter In The Upper Twenty Centimeters Of Marine Sediments, Ralph Gordon Johnson
Journal of Marine Research
A microscopic examination was made of the vertical distribution and abundance of particulate matter in six dissimilar cores of marine sediment. Two of the cores were taken in the intertidal and two in the shallow subtidal at stations in the vicinity of Woods Hole, Massachusetts. One core was taken in the Hudson Canyon and another at abyssal depths. Biological stains were used to identify potential food particles at the sediment-water interface, at two cm below the interface and at five cm intervals to a maximum depth of 20 cm.
Infaunal Macrobenthos Off Cap Blanc, Spanish Sahara, Jean Nichols, Gilbert T. Rowe
Infaunal Macrobenthos Off Cap Blanc, Spanish Sahara, Jean Nichols, Gilbert T. Rowe
Journal of Marine Research
Cap Blanc, Spanish Sahara is characterized by a nearshore benthic faunal province physically controlled by rates of sedimentation, conservatively estimated at 4 cm/yr, with a gradual transition across the continental shelf to a second province in a zone with high phytoplankton production of 2 gm C m-2 d-1 induced by upwelling at the continental shelf's outer margin....
Nepal Studies Association Bulletin, No. 8, Nepal Studies Association, Donald A. Messerschmidt
Nepal Studies Association Bulletin, No. 8, Nepal Studies Association, Donald A. Messerschmidt
Nepal Studies Association Newsletter
No abstract provided.
Zonation And Faunal Composition Of Epibenthic Populations On The Continental Slope South Of New England, Richard L. Haedrich, Gilbert T. Rowe, Pamela T. Polloni
Zonation And Faunal Composition Of Epibenthic Populations On The Continental Slope South Of New England, Richard L. Haedrich, Gilbert T. Rowe, Pamela T. Polloni
Journal of Marine Research
The epibenthic macrofauna, including demersal fishes, between 140 and 1900 m on the continental slope south of New England was found to be distributed in three zones: shallow (141-285 m), middle (393-1095 m), and deep (1270-1928 m). Fauna! boundaries were associated with the transition zones from shelf to upper continental slope and from upper to lower continental slope. The small Alvin Canyon was not faunally distinct. Fishes and echinoderms were the most abundant taxa, the former predominant in shallow and middle depths and the latter predominating deeper....
Exosphaeroma Crenulatum (Richardson), A Junior Synonym Of Dynamenella Perforata (Moore) (Crustacea: Isopoda), Peter W. Glynn
Exosphaeroma Crenulatum (Richardson), A Junior Synonym Of Dynamenella Perforata (Moore) (Crustacea: Isopoda), Peter W. Glynn
Postilla
Dynamenella perforata (Moore), a tropical western Atlantic sphaeromatid isopod commonly associated commensally with chitons, is shown on the basis of evidence from morphology and host preference studies to be a senior synonym of Exosphaeroma crenulatum (Richardson).
Regional Variations In Tropical High Intertidal Gastropod Assemblages, Geerat J. Vermeij
Regional Variations In Tropical High Intertidal Gastropod Assemblages, Geerat J. Vermeij
Journal of Marine Research
High intertidal gastropod assemblages in the Inda-Malaysian area and western Indian Ocean have a higher incidence of presumed antipredatory devices (obstructed apertures, inflexible opercula, low spires, and strong external shell sculpture) than high intertidal gastropods found elsewhere in the tropics....
Description Of Immature Stages Of Philolithus Densicollis And Stenomorpha Puncticollis With Notes On Their Biology (Coleoptera, Tenebrionidae, Tentyriinae), Kirby W. Brown
Postilla
Mature larvae of the tribe Asidini are characterized by an unsclerotized body, dorsally concave mandibles with preapical gibbosity and submarginal setose area, granulate cranium, swollen preepipleurum, and huge granulate forelegs with contiguous coxae surrounded by an enlarged sternellum. The pygidial terminus is rounded in Philolithus densicollis (Horn) and bifurcate in Stenomorpha puncticollis (LeConte). First-instar larvae lack granules on cranium and forelegs, have 2 setae on the labrum, possess egg bursters, and are very similar in both species. Eggs are large, averaging 2.5 mm in length in P. densicollis and 3.1 mm in S. puncticollis. Pupae are not known. The two …
Nepal Studies Association Newsletter, Issue 1, Nepal Studies Association
Nepal Studies Association Newsletter, Issue 1, Nepal Studies Association
Nepal Studies Association Newsletter
No abstract provided.
Avian Anatomical Specimens In The Peabody Museum Of Natural History, Yale University, Peter L. Ames, Eleanor H. Stickney
Avian Anatomical Specimens In The Peabody Museum Of Natural History, Yale University, Peter L. Ames, Eleanor H. Stickney
Postilla
Large collections of bird skins are found in many museums and in many countries, but far fewer institutions maintain collections preserved in alcohol or as skeletons, and fewer still attempt to expand these collections through field collecting….
The Type Fox Hills Formation, Cretaceous (Maestrichtian), South Dakota Part 1. Stratigraphy And Paleoenvironments, Karl M. Waage
The Type Fox Hills Formation, Cretaceous (Maestrichtian), South Dakota Part 1. Stratigraphy And Paleoenvironments, Karl M. Waage
Bulletin of the Peabody Museum of Natural History
Exposures of the Fox Hills Formation in Dewey, Ziebach and Corson counties, northwest-central South Dakota, include its historical type locality and constitute its type area….
A Revised List Of Brazilian Scleractinian Corals And Description Of A New Species, Jacques Laborel
A Revised List Of Brazilian Scleractinian Corals And Description Of A New Species, Jacques Laborel
Postilla
During the course of a three year sojourn at the Oceanographic Institute of the University of Recife a restudy of the reef corals of the Brazilian coast was undertaken….
Further Information On The Relative Length Of The Tarsus In Land Birds, P. R. Grant
Further Information On The Relative Length Of The Tarsus In Land Birds, P. R. Grant
Postilla
A tendency for island land birds to have a longer tarsus (tarsometatarsus) than their mainland relatives has been discovered recently (Grant, 1965a)….
A Study Of Photosynthetic Light Reactions, And A New Interpretation Of Sun And Shade Phytoplankton, Charles S. Yentsch, Robert W. Lee
A Study Of Photosynthetic Light Reactions, And A New Interpretation Of Sun And Shade Phytoplankton, Charles S. Yentsch, Robert W. Lee
Journal of Marine Research
The r elationship of photosynthesis to light intensity is examined, using phytoplankton cultured in different environments. The graphical means used in presenting the data are shown, and the desirability of normalizing the curves is discussed….
On Filinia Terminalis (Plate) And F. Pejleri Sp. N. (Rotatoria: Family Testudinellidae), G. E. Hutchinson
On Filinia Terminalis (Plate) And F. Pejleri Sp. N. (Rotatoria: Family Testudinellidae), G. E. Hutchinson
Postilla
In 1886, Plate described, as Triarthra terminalis, a rotifer found in the spring, in the vicinity of Bonn, which differed from T. longiseta Ehrenberg, now referred to Filinia, in having the posterior appendage inserted apically, rather than ventrally some little distance from the posterior end of the body.....
A Systematic And Ecological Study Of Birds Of New Guinea, S. Dillon Ripley
A Systematic And Ecological Study Of Birds Of New Guinea, S. Dillon Ripley
Bulletin of the Peabody Museum of Natural History
During two trips to West New Guinea in 1954 and 1960, the author made an extensive collection of birds as well as field notes in a variety of habitats ranging from the western islands adjacent to the coast of West New Guinea…
Some Distributional Features Of Mesopelagic Fishes Off Oregon, William G. Pearcy
Some Distributional Features Of Mesopelagic Fishes Off Oregon, William G. Pearcy
Journal of Marine Research
Over 200 collections made between June 1961 and August 1962 with a six-foot Isaacs-Kidd midwater trawl at various depths down to 1000 m (mostly down to 200 m) along three latitudes off Oregon have provided preliminary data on species composition, sampling variability, diurnal vertical migrations, depth distribution, and seasonal and geographic variations of adult and large juvenile mesopelagic fishes....
Snails On A Persian Hillside: Ecology-Prehistory-Gastronomy, Charles A. Reed
Snails On A Persian Hillside: Ecology-Prehistory-Gastronomy, Charles A. Reed
Postilla
The archeologist who is prehistorian may expect snail shells in his excavations. Sometimes, even though the site may be far from the nearest seas, such shells are marine and often were used as decorations, indicating the continuity of human vanity through the ages. Generally, the archeologist has had little interest in such shells as snails, or even in the generic and specific identifications furnished him by a malacologist; instead, the archeologist is interested in any cultural uses of the shells, and is intrigued by problems of their geographic origin and the possibility of tracing prehistoric trade routes. However, to the …
Volume 18. Article 1. Ecology Of An Estuarine Population Of Winter Flounder, Pseudopleuronectes Americanus (Walbaum). Parts I-Iv., William G. Pearcy
Volume 18. Article 1. Ecology Of An Estuarine Population Of Winter Flounder, Pseudopleuronectes Americanus (Walbaum). Parts I-Iv., William G. Pearcy
Bulletin of the Bingham Oceanographic Collection
No abstract provided.