نتایج جستجو برای: scallop

تعداد نتایج: 1556  

2005
C. M. ELFSTROM P. M. GAFFNEY C. T. SMITH J. E. SEEB

We describe 27 single nucleotide polymorphisms (SNPs) in a commercially important bivalve, the weathervane scallop ( Patinopecten caurinus ), identified using a targeted-gene approach. We further characterize 12 of these using 5′ -nuclease and allele-specific PCR assays. Polymorphisms were identified in both mitochondrial and nuclear genes. These are the first SNPs developed for delineating pop...

Journal: :Meccanica 2022

Abstract A swimmer embedded on an inertialess fluid must perform a non-reciprocal motion to swim forward. The archetypal demonstration of this unique motion-constraint was introduced by Purcell with the so-called “scallop theorem”. Scallop here is minimal mathematical model composed two arms connected via hinge whose periodic (of opening and closing its arms) not sufficient achieve net displace...

2006
Diego Valderrama James L. Anderson

An age-structured bioeconomic model was constructed to determine optimal patterns of exploitation for the U.S. Atlantic sea scallop fishery. Results indicated that economic rents are maximized by engaging in pulse fishing strategies, whereby fishing only occurs following a multi-year closure period. Closures allow biomass to accumulate undisturbed for several years in a row, leading to the harv...

Karami , N, Mohagheghian , A, Shirzad-Siboni , M,

Abstract Introduction: Phenol is amongst the dangerous environmental pollutants, which due to its presence in the industrial effluents, should be removed. Objective: The aim of this study was to evaluate the efficiency of catalytic ozonation by calcined scallop shell as a catalyst in the removal of phenol Materials and Methods: Scallop shells were collected from the coast of Caspian Sea in G...

2013
E. Vasileva

A marine certified reference material (CRM), IAEA-452, prepared with scallop (Pecten maximus) sample was recently produced by the International Atomic Energy Agency (IAEA) and certified for trace elements and methyl mercury (MeHg). The Scallop (Pecten maximus) sample is commonly found and consumed seafood and is also used as bio-indicators for trace metal contamination in marine pollution studi...

Journal: :Marine pollution bulletin 2015
Claudio D Miranda Rodrigo Rojas Julieta Geisse Jaime Romero Gerardo González-Rocha

The main aim of the study was to evaluate the role of scallop hatcheries as source of the floR and cmlA genes. A number of 133 and 121 florfenicol-resistant strains were isolated from scallop larval cultures prior to their transfer to seawater and from effluent samples from 2 commercial hatcheries and identified by 16S rRNA gene sequence analysis, observing a predominance of the Pseudomonas, Ps...

2017
Xiaoshi Ma Aichang Ji Zhifeng Zhang Dandan Yang Shaoshuai Liang Yuhan Wang Zhenkui Qin

Piwi (P-element induced wimpy testis) is an important gene involved in stem cell maintenance and gametogenesis in vertebrates. However, in most invertebrates, especially mollusks, the function of Piwi during gametogenesis remains largely unclear. To further understand the function of Piwi during gametogenesis, full-length cDNA of Piwi1 from scallop Chlamys farreri (Cf-Piwi1) was characterized, ...

2014
Tian Qiu Tung-Chun Lee Andrew G. Mark Konstantin I. Morozov Raphael Münster Otto Mierka Stefan Turek Alexander M. Leshansky Peer Fischer

Biological microorganisms swim with flagella and cilia that execute nonreciprocal motions for low Reynolds number (Re) propulsion in viscous fluids. This symmetry requirement is a consequence of Purcell's scallop theorem, which complicates the actuation scheme needed by microswimmers. However, most biomedically important fluids are non-Newtonian where the scallop theorem no longer holds. It sho...

2012
R. A. Perrin P. R. Hay

Three distinct phases occur in the history of management of the Tasmanian scallop industry, corresponding with a shift in the industry's locus, from D'Entrecasteaux Channel to the East Coast, and thence to Bass Strait. Each shift was prompted by crisis in the industry, and though the result on each occasion was to dramatically increase the scale of the ind ustry, the record has been one of ad h...

2002
Farhad Azadivar Kevin D.E. Stokesbury Brian J. Rothschild

The sea scallop resource of Georges Bank supports one of the largest commercial fisheries in the United States. The objective of this research was to develop a technique to examine different management strategies for the sea scallop resource of Georges Bank and compare these strategies to the optimal. A simulation model followed the sea scallop population dynamics using information from recent ...

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