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Full-Text Articles in Life Sciences

Experimental Culture And Particle Filtration By Asian Moon Scallops, Amusium Pleuronectes, Michael A. Rice, Robert B. Rheault, Miguel S. Perez, Vicente S. Perez Sep 1994

Experimental Culture And Particle Filtration By Asian Moon Scallops, Amusium Pleuronectes, Michael A. Rice, Robert B. Rheault, Miguel S. Perez, Vicente S. Perez

Michael A Rice

Growth rates were determined for scallops (35-75 mm valve height) held in pocket nets and lantern nets at varying densities. The Ford-Walford linear transformation of the von Bertalanffy growth equation was used to allow quantification of food-limited stunting. Pocket nets allowed for greater growth of scallops than did the lantern nets at all stocking densities. The growth rates of scallops in pocket nets, nevertheless, were well below the growth of scallops in the wild. Clearance rates of Caribbean strains of Isochrysis galbana (C-ISO) and Chaetocerous gracilus (C-Cg) were determined for moon scallops. Amusin pleuronectes, in static chambers at 28ºC. The …


Https://Www.Foodiespanda.Com/Keto-Fire/, Keto Fire Diet707 Sep 1994

Https://Www.Foodiespanda.Com/Keto-Fire/, Keto Fire Diet707

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Intrapopulation Variation In Hatching Synchrony In House Wrens: Test Of The Individual-Optimization Hypothesis, Given Harper, Steven A. Juliano, Charles F. Thompson Jun 1994

Intrapopulation Variation In Hatching Synchrony In House Wrens: Test Of The Individual-Optimization Hypothesis, Given Harper, Steven A. Juliano, Charles F. Thompson

Given Harper

Intrapopulation variation in hatching synchrony has been documented in several avian species, although little attention has been paid to this phenomenon. We experimentally reversed some synchronously and asynchronously hatched broods to test an individual-optimization hypothesis to explain variation in hatching synchrony in a population of House Wrens (Troglodytes aedon) in central Illinois. Contrary to expectation, the number and quality (as measured by mass) of fledglings produced in reversed broods was the same as that for unmanipulated broods, as were recapture rates of juveniles and offspring recruitment to subsequent breeding populations. Thus, the results do not support the individual-optimization hypothesis as …


Altering The Rna Binding Specificity Of A Translational Repressor, F Lim, Marc Spingola, D S. Peabody Mar 1994

Altering The Rna Binding Specificity Of A Translational Repressor, F Lim, Marc Spingola, D S. Peabody

Marc Spingola

The coat proteins of RNA phages MS2 and GA are specific RNA-binding proteins which function to encapsidate viral RNA and to translationally repress synthesis of the viral replicase. The two proteins have highly homologous amino acid sequences, yet they show different RNA binding specificities, recognizing RNA stem-loop structures which differ primarily in the nucleotide sequences of their loops. We sought to convert MS2 coat protein to the RNA binding specificity of GA through the introduction of GA-like amino acid substitutions into the MS2 coat protein RNA-binding site. The effects of the mutations were determined by measuring the affinity of the …


A Transition From Agriculture To Regenerative Food Systems, Kenneth Dahlberg Feb 1994

A Transition From Agriculture To Regenerative Food Systems, Kenneth Dahlberg

Kenneth Dahlberg

As part of the larger transition to a post-fossil-fuel era, major transformations of industrial agriculture can be expected to occur. This is not only because industrial agriculture is a major source of the unsustainability of industrial societies, but because it is itself unsustainable. Development of the types of regenerative and sustainable food and fibre systems that are needed will involve: (1) a restructuring and decolonizing of industrial agriculture; (2) the maintenance and enhancement of indigenous and traditional food systems; and (3) conceptual and value shifts towards systems approaches, contextual analysis by levels, and the use of health models rather than …


Settlement And Recruitment Of Bay Scallops, Argopecten Irradians (Lamarck 1819), To Artificial Spat Collectors In The Westport River Estuary, Westport, Massachusetts, Karin A. Tammi, Scott J. Soares, Wayne Turner, Michael A. Rice Dec 1993

Settlement And Recruitment Of Bay Scallops, Argopecten Irradians (Lamarck 1819), To Artificial Spat Collectors In The Westport River Estuary, Westport, Massachusetts, Karin A. Tammi, Scott J. Soares, Wayne Turner, Michael A. Rice

Michael A Rice

In January 1993, The Waterworks Group initiated the Bay Scallop Restoration Project as an attempt to restore the once prolific bay scallop within the Westport River Estuary in Massachusetts. This project is a multi-phased endeavor aimed at better understanding recruitment failures of both natural stocks and introduced seed of Argopecten irradians. The main objective of this project is to assesss juvenile recruitment (survival to > 4mm) to artificial spat collectors placed in historically productive scallop beds and within close proximity to adult spawner rafts. Spat collectors (2 to 4mm plastic mesh bags) containing monofilament were suspended on 28 to 35-meter floating …