Settlement behavior and metamorphosis of oyster larvae (Crassostrea gigas) in response to bacterial supernatants

1990 ◽  
Vol 106 (3) ◽  
pp. 389-394 ◽  
Author(s):  
W. K. Fitt ◽  
S. L. Coon ◽  
M. Walch ◽  
R. M. Weiner ◽  
R. R. Colwell ◽  
...  
Keyword(s):  
Crassostrea Gigas ◽  
Settlement Behavior ◽  
Bacterial Supernatants

scholarly journals Regulatory Role of Sugars on the Settlement Inducing Activity of a Conspecific Cue in Pacific Oyster Crassostrea gigas

2021 ◽  
Vol 22 (6) ◽  
pp. 3273
Author(s):  
Mary Grace Sedanza ◽  
Hee-Jin Kim ◽  
Xerxes Seposo ◽  
Asami Yoshida ◽  
Kenichi Yamaguchi ◽  
...  
Keyword(s):  
Crassostrea Gigas ◽  
Chemical Cues ◽  
Pacific Oyster ◽  
Ethylenediaminetetraacetic Acid ◽  
Larval Settlement ◽  
Endogenous Ligand ◽  
Settlement Behavior ◽  
Coated Surfaces ◽  
Settlement Inhibition

This study evaluated the larval settlement inducing effect of sugars and a conspecific cue from adult shell extract of Crassostrea gigas. To understand how the presence of different chemical cues regulate settlement behavior, oyster larvae were exposed to 12 types of sugars, shell extract-coated and non-coated surfaces, and under varied sugar exposure times. Lectin-glycan interaction effects on settlement and its localization on oyster larval tissues were investigated. The results showed that the conspecific cue elicited a positive concentration dependent settlement inducing trend. Sugars in the absence of a conspecific cue, C. gigas adult shell extract, did not promote settlement. Whereas, in the presence of the cue, showed varied effects, most of which were found inhibitory at different concentrations. Sugar treated larvae exposed for 2 h showed significant settlement inhibition in the presence of a conspecific cue. Neu5Ac, as well as GlcNAc sugars, showed a similar interaction trend with wheat germ agglutinin (WGA) lectin. WGA-FITC conjugate showed positive binding on the foot, velum, and mantle when exposed to GlcNAc sugars. This study suggests that a WGA lectin-like receptor and its endogenous ligand are both found in the larval chemoreceptors and the shell Ethylenediaminetetraacetic acid (EDTA) extract that may complementarily work together to allow the oyster larva greater selectivity during site selection.

Retos de la acuicultura marina litoral: Caso cultivo de ostras en el Golfo de Nicoya, Costa Rica

2019 ◽  
Author(s):  
Rebeca Quesada Céspedes ◽  
Sidey Arias Valverde ◽  
Oscar Pacheco Urpí ◽  
Gerardo Zúñiga Calero ◽  
Oscar José Pacheco Prieto ◽  
...  
Keyword(s):  
Costa Rica ◽  
Crassostrea Gigas

Costa Rica muestra una condición incipiente en el desarrollo de la acuicultura marina, a pesar de los esfuerzos invertidos por más de veinte años. La experiencia en el cultivo de Crassostrea gigas alcanzada por comunidades, la institucionalidad pública y ONG´s, desde el ámbito social- económico y ambiental, evidencian que el país cuenta con las condiciones idóneas, para direccionar la ostricultura como un nuevo sector socio-económico con y desde las comunidades marino costeras del litoral pacífico. El presente trabajo expone los logros obtenidos por comunidades y actores locales; además los retos que ambas partes se han propuesto para hacer de esta actividad una herramienta más que contribuye con la sustentabilidad y empoderamiento de familias y comunidades que actualmente se encuentran en condiciones de pobreza.

Effects of Environmental Factors and Husbandry Practices on Summer Mortality Events in the Cultivated Pacific Oyster Crassostrea gigas in the North of Ireland

2020 ◽  
Vol 39 (1) ◽  
pp. 13
Author(s):  
Elizabeth C. Ashton ◽  
Simon Guist ◽  
Dai Roberts ◽  
Julia D. Sigwart
Keyword(s):  
Environmental Factors ◽  
Crassostrea Gigas ◽  
Pacific Oyster ◽  
The North ◽  
Summer Mortality ◽  
Husbandry Practices

Phylogenetic analysis of tyrosinase gene family in the Pacific oyster (Crassostrea gigas Thunberg)

2014 ◽  
Vol 36 (2) ◽  
pp. 135-144
Author(s):  
Yu Xue ◽  
Yu Hong ◽  
Kong Lingfeng ◽  
Li Qi
Keyword(s):  
Phylogenetic Analysis ◽  
Gene Family ◽  
Crassostrea Gigas ◽  
Pacific Oyster ◽  
Tyrosinase Gene ◽  
The Pacific

Comparison of Taste, Odor, and Texture Characterizations between Rack-and-Bag and Suspended Cultured Pacific Oysters Crassostrea gigas

2018 ◽  
Vol 47 (4) ◽  
pp. 455-461
Author(s):  
Sun Young Park ◽  
Do Youb Kim ◽  
Jeong-Mee Lee ◽  
Jin-Soo Kim
Keyword(s):  
Crassostrea Gigas ◽  
Pacific Oysters

Баркодинг митохондриальной ДНК тихоокеанской устрицы Crassostrea gigas (Thunberg, 1793) (Mollusca: Bivalvia: Ostreidae), культивируемой в Черном море

2018 ◽  
Vol 54 (12) ◽  
pp. 1419-1425
Author(s):  
Ю. В. Слынько ◽  
Е. Е. Слынько ◽  
А. В. Пиркова ◽  
Л. В. Ладыгина ◽  
В. И. Рябушко
Keyword(s):  
Crassostrea Gigas

A novel heptapeptide derived from Crassostrea gigas shows anticoagulant activity by targeting for thrombin active domain

2021 ◽  
Vol 334 ◽  
pp. 127507
Author(s):  
Shuzhen Cheng ◽  
Maolin Tu ◽  
Hanxiong Liu ◽  
Yue An ◽  
Ming Du ◽  
...  
Keyword(s):  
Crassostrea Gigas ◽  
Anticoagulant Activity

Comparison of the Bidirectional Load Test with the Top-Down Load Test

2005 ◽  
Vol 1936 (1) ◽  
pp. 108-116 ◽  
Author(s):  
Oh Sung Kwon ◽  
Yongkyu Choi ◽  
Ohkyun Kwon ◽  
Myoung Mo Kim
Keyword(s):  
Load Transfer ◽  
Measurement Data ◽  
Load Test ◽  
Load Testing ◽  
Pile Head ◽  
Top Down ◽  
Simple Method ◽  
Testing Method ◽  
Settlement Behavior ◽  
Cell Test

For the past decade, the Osterberg testing method (O-cell test) has been proved advantageous over the conventional pile load testing method in many aspects. However, because the O-cell test uses a loading mechanism entirely different from that of the conventional pile loading testing method, many investigators and practicing engineers have been concerned that the O-cell test would give inaccurate results, especially about the pile head settlement behavior. Therefore, a bidirectional load test using the Osterberg method and the conventional top-down load test were executed on 1.5-m diameter cast-in-place concrete piles at the same time and site. Strain gauges were placed on the piles. The two tests gave similar load transfer curves at various depth of piles. However, the top-down equivalent curve constructed from the bidirectional load test results predicted the pile head settlement under the pile design load to be approximately one half of that predicted by the conventional top-down load test. To improve the prediction accuracy of the top-down equivalent curve, a simple method that accounts for the pile compression was proposed. It was also shown that the strain gauge measurement data from the bidirectional load test could reproduce almost the same top-down curve.

scholarly journals Protein kinase-like ER kinase (PERK) regulates autophagy of hemocytes in antiviral immunity of Pacific oyster Crassostrea gigas

2020 ◽  
Vol 1 ◽  
pp. 100002
Author(s):  
Shujing Liu ◽  
Weilin Wang ◽  
Yu Liu ◽  
Wanqing Cao ◽  
Pei Yuan ◽  
...  
Keyword(s):  
Protein Kinase ◽  
Crassostrea Gigas ◽  
Pacific Oyster ◽  
Antiviral Immunity
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