Recent foundation of Mexican populations of pearl oysters (Pteria sterna) revealed by lack of genetic variation on two mitochondrial genes

2005 ◽  
Vol 85 (2) ◽  
pp. 363-366
Author(s):  
S. Arnaud-Haond ◽  
F. Blanc ◽  
F. Bonhomme ◽  
M. Monteforte
Keyword(s):  
Baja California ◽  
Pearl Oyster ◽  
Mitochondrial Genes ◽  
Economic Potential ◽  
Recent Event ◽  
Mexican Pacific ◽  
Pearl Oysters ◽  
Founder Event ◽  
Fossil Records ◽  
Mexican Populations

The rainbow pearl oyster Pteria sterna is distributed along the Mexican Pacific coasts and Gulf of Baja California, where it represents a great economic potential. Five sampled populations collected in Baja California were used to screen two mitochondrial DNA genes that have proven useful in population genetics studies of several other bivalve species. The lack of polymorphism detected in these samples suggests a recent event of very low population size, most likely a founder event, which is congruent with the absence of P. sterna in the fossil records in Baja California.

scholarly journals Cubagua’s Pearl-Oyster Beds: The First Depletion of a Natural Resource Caused by Europeans in the American Continent

1999 ◽  
Vol 6 (1) ◽  
pp. 57 ◽  
Author(s):  
Aldemaro Romero ◽  
Susanna Chilbert ◽  
M.G. Eisenhart
Keyword(s):  
Natural Resources ◽  
Natural Resource ◽  
Conservation Policy ◽  
Pearl Oyster ◽  
Biological Conservation ◽  
American Continent ◽  
First Case ◽  
Pearl Oysters ◽  
Interdisciplinary Approaches ◽  
Pinctada Imbricata

Cubagua’s Pearl-Oyster Beds: The First Depletion of a Natural Resource Caused byEuropeans in the American Continent Interdisciplinary approaches to understanding the causes and mechanisms of depletion of natural resources can provide powerful tools in biological conservation policy. We report here what we believe was the first case of a depletion of a natural resource in the American continent by Europeans: the pearl-oyster (Pinctada imbricata) beds off the coast of Cubagua, Venezuela, in the early sixteenth century.Key words: Pearl-oysters, Depletion, Natural Resources, Overexploitation, HumanRights, Venezuela, Cubagua.

scholarly journals Growth and survival of the pearl oyster Pteria hirundo (L.,1758) in an intermediate stage of culture in Santa Catarina, Brazil

2012 ◽  
Vol 72 (1) ◽  
pp. 175-180 ◽  
Author(s):  
MCP Albuquerque ◽  
R Alves ◽  
ACV Zanandrea ◽  
JF Ferreira ◽  
CMR Melo ◽  
...  
Keyword(s):  
Culture System ◽  
Intermediate Stage ◽  
Pearl Oyster ◽  
Average Increase ◽  
Southern Brazil ◽  
Growth And Survival ◽  
Life Conditions ◽  
Pearl Oysters ◽  
Survival And Growth ◽  
Closed Environment

There are no records in Brazil for the culture of Pteridae family oysters, genus Pteria and Pinctada. The intermediate culture can be considered one of the critical stages during the oyster farming. The changes in life conditions from a semi-closed environment provided by the collector to the structures utilized for the growth represents a considerable stress factor to which the animals are subjected. The goal of the present study was to evaluate the growth and survival of the pearl oyster Pteria hirundo (Linnaeus, 1758) kept in intermediate lanterns. Seeds of P. hirundo, obtained through larviculture carried out at the Marine Molluscs Laboratory (UFSC), southern Brazil were detached from the collectors, transferred and kept in an intermediate culture system (oyster lantern). During 6 months, growth (dorso-ventral height - DVH in mm) and survival (%) were evaluated. Two size classes were tested: medium (M), between 3.4 and 4.4 mm, and large (L), bigger than 4.5 mm. The density of occupation in each floor of the lantern was 50%. At the end of the experiment, the survivals observed were 90 and 94% for the sizes M and L, respectively. Medium juveniles of Pteria hirundo had an average (Std) increase of 16.1 (±4.38) mm in the dorso-ventral height, and large juveniles an average increase of 11.4 (±3.77) mm after six months of experiment. The results observed during the intermediate stage of cultivation indicate that Pteria hirundo presents survival and growth similar to other species of pearl oysters traditionally used in the pearl industry in several countries.

scholarly journals Control of Polychaetes by Dipping Infected Pearl Oyster on Different Salinity

2007 ◽  
Vol 3 (2) ◽  
pp. 47
Author(s):  
Yani Hadiroseyani ◽  
. Iswadi ◽  
Daniel Djokosetyanto
Keyword(s):  
Survival Rate ◽  
Key Words ◽  
Saline Water ◽  
Pearl Oyster ◽  
High Survival ◽  
High Survival Rate ◽  
Pearl Oysters ◽  
Pinctada Maxima

<p>Dip treatment on pearl oysters <em>(Pinctada maxima) </em>was conducted in different concentrations of saline water to eliminate boring polychaetes. Results shows that polychaetes leave the osyters which treated on saline water at 0 ppt, 45 ppt, and 60 ppt as long as 15 minutes each. It also shows that the oysters got high survival rate 7 days after the treatment.</p> <p>Key words : Polychaetes, pearl oyster, dipping, salinity</p> <p> </p> <p>ABSTRAK</p> <p>Pengendalian polikaeta pengebor dengan menggunakan berbagai konsentrasi larutan garam telah dilakukan pada tiram mutiara <em>(Pinctada maxima). </em>Berdasarkan jumlah polikaeta yang keluar, hasil percobaan ini menunjukkan bahwa perendaman dengan konsentrasi garam 0 ppt. 45 ppt, dan 60 ppt selama 15 menit lebih efektif dibandingkan pada konsentrasi 15 dan 30 ppt. Tingkat kelangsungan hidup tiram mutiara yang diamati 7 hari setelah perendaman dalam larutan garam mencapai 100%.</p> Kata kunci : Polikaeta. tiram mutiara, perendaman. salinitas

scholarly journals Mass mortality of pearl oyster (Pinctada fucata (Gould)) in Japan in 2019 and 2020 is caused by an unidentified infectious agent

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12180
Author(s):  
Tomomasa Matsuyama ◽  
Satoshi Miwa ◽  
Tohru Mekata ◽  
Yuta Matsuura ◽  
Tomokazu Takano ◽  
...  
Keyword(s):  
Infectious Agent ◽  
Serial Passage ◽  
Pearl Oyster ◽  
Mass Mortality ◽  
Pinctada Fucata ◽  
Enveloped Virus ◽  
Pearl Oysters ◽  
Adult Oyster ◽  
Sources Of Infection ◽  
Pathogen Occurrence

Mass mortality of 0-year-old pearl oysters, Pinctada fucata (Gould), and anomalies in adults were observed in Japan’s major pearl farming areas in the summer of 2019 and 2020. Although adult oyster mortality was low, both adult and juvenile oysters underwent atrophy of the soft body, detachment of the mantle from nacre (the shiny inner surface of the valves), deposition of brownish material on the nacre, and loss of nacre luster. Infection trials were conducted to verify the involvement of pathogens in this phenomenon. Healthy adult pearl oysters were obtained from areas where this disease had not occurred to use as the recipients. The sources of infection were either affected adult oysters with atrophied soft bodies or batches of juveniles in which mortality had reached conspicuous levels. Transmission of the disease to the healthy oysters were tested either by cohabitation with affected oysters or by injections of the hemolymph of affected animals. The injection infection test examined the effects of filtration and chloroform exposure on the pathogen. Occurrence of the disease was confirmed by the appearance of brown deposits on the nacre and loss of nacre luster. The abnormalities of nacre were clearly reproduced in recipient shells in three out of four cohabitation trials with affected oysters. The disease was also reproduced in six out of six injection trails either with hemolymph filtered through 100 nm filter or with hemolymph treated with chloroform. In a serial passage with hemolymph injections, the disease was successfully transmitted through eight passages. These results suggest that the etiology of the disease is a non-enveloped virus with a diameter ≤100 nm.

scholarly journals Speciation and Domestication in Maize and Its Wild Relatives: Evidence From the Globulin-1 Gene

Genetics ◽  
1998 ◽  
Vol 150 (2) ◽  
pp. 863-872 ◽  
Author(s):  
Holly Hilton ◽  
Brandon S Gaut
Keyword(s):  
Dna Sequences ◽  
Sequence Variation ◽  
Common Ancestor ◽  
Seed Storage Protein ◽  
Sequence Data ◽  
Seed Storage ◽  
Neutral Evolution ◽  
Recent Event ◽  
Intermediate Size ◽  
Founder Event

Abstract The grass genus Zea contains the domesticate maize and several wild taxa indigenous to Central and South America. Here we study the genetic consequences of speciation and domestication in this group by sampling DNA sequences from four taxa—maize (Zea mays ssp. mays), its wild progenitor (Z. mays ssp. parviglumis), a more distant species within the genus (Z. luxurians), and a representative of the sister genus (Tripsacum dactyloides). We sampled a total of 26 sequences from the glb1 locus, which encodes a nonessential seed storage protein. Within the Zea taxa sampled, the progenitor to maize contains the most sequence diversity. Maize contains 60% of the level of genetic diversity of its progenitor, and Z. luxurians contains even less diversity (32% of the level of diversity of Z. mays ssp. parviglumis). Sequence variation within the glb1 locus is consistent with neutral evolution in all four taxa. The glb1 data were combined with adh1 data from a previous study to make inferences about the population genetic histories of these taxa. Comparisons of sequence data between the two morphologically similar wild Zea taxa indicate that the species diverged ∼700,000 years ago from a common ancestor of intermediate size to their present populations. Conversely, the domestication of maize was a recent event that could have been based on a very small number of founding individuals. Maize retained a substantial proportion of the genetic variation of its progenitor through this founder event, but diverged rapidly in morphology.

scholarly journals PHYTOPLANKTON COMPOSITION AND ITS RELATION TO PEARL OYSTER AQUACULTURE (Pinctada maxima) IN SEKOTONG, WEST NUSA TENGGARA

2015 ◽  
Vol 7 (1) ◽  
Author(s):  
. Fathurrahman ◽  
. Aunurohim ◽  
Varian Fahmi
Keyword(s):  
Common Species ◽  
Pearl Oyster ◽  
Physical Parameters ◽  
Phytoplankton Composition ◽  
Water Condition ◽  
Pearl Oysters ◽  
Oyster Aquaculture ◽  
Aquaculture Industry ◽  
Water Nutrients ◽  
Pinctada Maxima

Pearl oyster aquaculture is one of the marine industries that is currently growing in West Nusa Tenggara. Pearl oyster (Pinctada maxima) is a common species of oyster that cultivated in West Nusa Tenggara waters. A suitable location is an important factor for the success of pearl aquaculture industry. It needs a good water quality and supported by appropriate physical parameters for other marine biotas. The aim of this research was to analize phytoplankton composition (biological parameter) and it correlation to the Sekotong water condition for pearl farming production. The result showed that the pearl farming location has good water condition according to physio-chemical parameter and water nutrients. All parameters were in suitable range for the growth and development of pearl oysters. Keywords: pearl farming, phytoplankton, Pinctada maxima, West Nusta Tenggara

A new species of Dasybranchethus (Annelida: Capitellidae) from Mexican Pacific, with a redescription of Dasybranchethus fauveli

2009 ◽  
Vol 89 (7) ◽  
pp. 1437-1441 ◽  
Author(s):  
M.E. García-Garza ◽  
J.A. de León-González
Keyword(s):  
New Species ◽  
Gulf Of California ◽  
Type Species ◽  
Baja California ◽  
Type Material ◽  
Baja California Sur ◽  
Middle Line ◽  
Dorsal Lobe ◽  
Mexican Pacific ◽  
A New Species

Dasybranchetus pacifica, collected in Concepcion Bay, Baja California Sur, Gulf of California, is described as a new species. In addition, the type species of the genus, Dasybranchetus fauveli Monro, 1931, is redescribed based on type material. The new species differs from D. fauveli in the absence of branchiae, the begining of the mid-dorsal lobe from chaetiger 2 instead of chaetiger 9, abdominal segments with well-developed neuropodial lobes, and hooded hooks with a main fang and three rows of subapical teeth in the following arrangement: 4 teeth in the basal line, 3 in the middle line, and 2 in the apical line.

scholarly journals THE EFFECT OF SEASONS AND DEPTHS ON GROWTH AND SURVIVAL RATE OF PEARL OYSTER (Pinctada maxima) IN KODEK BAY, NORTH LOMBOK

2011 ◽  
Vol 3 (2) ◽  
Author(s):  
M. S. Hamzah ◽  
Bisman Nababan ◽  
Bisman Nababan
Keyword(s):  
Survival Rate ◽  
Seedling Survival ◽  
Pearl Oyster ◽  
Mass Mortality ◽  
Growth And Survival ◽  
Transition Season ◽  
Pearl Oysters ◽  
Significant Difference ◽  
Similar Survival ◽  
Pinctada Maxima

The pearl oyster (Pinctada maxima) farming in the West Nusa Tenggara waters in particular and in other areas, complained to the mass mortality of pearl oysters saplings on shell width between 3-4 cm. The mass mortality, allegedly as a result of changing in environmental conditions and triggered by the shift in seasons. This research aimed to determine the effect of seasonal variations in water conditions at different depth levels on growth and survival of seedlings of pearl oysters conducted on March 23, 2008 to February 22, 2009. This research was very useful for pearl oyster farming in an effort to suppress the mass mortality rates based on the appropriate level of depth and seasons. Analysis of variance showed that the seasonal factors, the level of depth, and the interaction between both factors responded very significantly on pearl oyster seedling survival. The "significant difference test" showed that the interaction between season and level of 2 m depth provided the best result with 100% survival. The similar survival rate was also found at a depth of 8 m during the transition season I and the east season. For single factor (depth), the best result for growth and survival rate was found in 2 m deep during the transition season I.Keywords: Oyster sapling, Pinctada maxima, growth, mortality, season, depth, Kodek Bay

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