scholarly journals Retraction: First Report of Vibrio tubiashii Associated with a Massive Larval Mortality Event in a Commercial Hatchery of Scallop Argopecten purpuratus in Chile

2018 ◽  
Vol 9 ◽  
Author(s):  
Keyword(s):  
Larval Mortality ◽  
First Report ◽  
Mortality Event ◽  
Vibrio Tubiashii ◽  
Argopecten Purpuratus

scholarly journals First Report of Okadaic Acid and Pectenotoxins in Individual Cells of Dinophysis and in Scallops Argopecten purpuratus from Perú

Toxins ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 490 ◽  
Author(s):  
Alex Alcántara-Rubira ◽  
Víctor Bárcena-Martínez ◽  
Maribel Reyes-Paulino ◽  
Katherine Medina-Acaro ◽  
Lilibeth Valiente-Terrones ◽  
...  
Keyword(s):  
Okadaic Acid ◽  
Harmful Algal Bloom ◽  
Shellfish Poisoning ◽  
The South ◽  
First Report ◽  
The North ◽  
Cell Quota ◽  
Regulatory Limits ◽  
Argopecten Purpuratus ◽  
Production Areas

Causative species of Harmful Algal Bloom (HAB) and toxins in commercially exploited molluscan shellfish species are monitored weekly from four classified shellfish production areas in Perú (three in the north and one in the south). Okadaic acid (OA) and pectenotoxins (PTXs) were detected in hand-picked cells of Dinophysis (D. acuminata-complex and D. caudata) and in scallops (Argopecten purpuratus), the most important commercial bivalve species in Perú. LC-MS analyses revealed two different toxin profiles associated with species of the D. acuminata-complex: (a) one with OA (0.3–8.0 pg cell−1) and PTX2 (1.5–11.1 pg cell−1) and (b) another with only PTX2 which included populations with different toxin cell quota (9.3–9.6 pg cell−1 and 5.8–9.2 pg cell−1). Toxin results suggest the likely presence of two morphotypes of the D. acuminata-complex in the north, and only one of them in the south. Likewise, shellfish toxin analyses revealed the presence of PTX2 in all samples (10.3–34.8 µg kg−1), but OA (7.7–15.2 µg kg−1) only in the northern samples. Toxin levels were below the regulatory limits established for diarrhetic shellfish poisoning (DSP) and PTXs (160 µg OA kg−1) in Perú, in all samples analyzed. This is the first report confirming the presence of OA and PTX in Dinophysis cells and in shellfish from Peruvian coastal waters.

scholarly journals Co-infection by alveolate parasites and frog virus 3-like ranavirus during an amphibian larval mortality event in Florida, USA

2013 ◽  
Vol 105 (2) ◽  
pp. 89-99 ◽  
Author(s):  
JH Landsberg ◽  
Y Kiryu ◽  
M Tabuchi ◽  
TB Waltzek ◽  
KM Enge ◽  
...  
Keyword(s):  
Larval Mortality ◽  
Frog Virus 3 ◽  
Frog Virus ◽  
Mortality Event

scholarly journals The endophytic fungi from South Sumatra (Indonesia) and their pathogenecity against the new invasive fall armyworm, Spodoptera frugiperda

2021 ◽  
Vol 22 (2) ◽  
Author(s):  
Mimma Gustianingtyas ◽  
Siti Herlinda ◽  
Suwandi Suwandi
Keyword(s):  
Endophytic Fungi ◽  
Insecticidal Activity ◽  
Spodoptera Frugiperda ◽  
Larval Mortality ◽  
Fall Armyworm ◽  
High Potential ◽  
Plant Roots ◽  
First Report ◽  
Fungal Isolates ◽  
Aspergillus Sp

Abstract. Gustianingtyas M, Herlinda S, Suwandi. 2021. The endophytic fungi from South Sumatra (Indonesia) and their pathogenicity against the new invasive fall armyworm, Spodoptera frugiperda. Biodiversitas 22: 1051-1062. Maize in Indonesia is currently experiencing attacks and outbreaks of the new invasive fall armyworm, Spodoptera frugiperda. The S. frugiperda larvae emerge from the leaf midrib when eating, after hiding in the maize stalk so that it is difficult to control by contact. This study aimed to find out the endophytic fungi from the roots of maize, banana and chili in South Sumatra and to determine their pathogenicity against S. frugiperda larvae. The endophytic fungi were isolated from the plant roots. Fungal isolates proven to be endophytic were dropped (1 × 106 conidia mL−1) on the second instar larvae. The result showed that the endophytic fungi found were 8 isolates consisting of the genus, Aspergillus sp., Beauveria sp., Chaetomium sp., and Curvularia sp. First report of Aspergillus sp., Chaetomium sp., and Curvularia sp. have insecticidal activity against S. frugiperda larvae. However, the two most pathogenic isolates were JgCrJr and JgSPK isolates of Beauveria sp. with larval mortality of 29.33% and 26.67%, respectively, and could reduce the emergence of S. frugiperda adults up to 44%. So, the two isolates of Beauveria sp. have a high potential to be developed to control S. frugiperda larvae in maize both in the lowlands and the highlands.

scholarly journals First Report of Domoic Acid Production from Pseudo-nitzschia multistriata in Paracas Bay (Peru)

Toxins ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 408
Author(s):  
Cecil Tenorio ◽  
Gonzalo Álvarez ◽  
Sonia Quijano-Scheggia ◽  
Melissa Perez-Alania ◽  
Natalia Arakaki ◽  
...  
Keyword(s):  
Domoic Acid ◽  
High Resolution Mass Spectrometry ◽  
Morphological Characteristics ◽  
Its2 Sequence ◽  
Internal Transcribed Spacers ◽  
Phytoplankton Production ◽  
First Report ◽  
Routine Monitoring ◽  
Argopecten Purpuratus ◽  
Trophic Network

The Peruvian sea is one of the most productive ecosystems in the world. Phytoplankton production provides food for fish, mammals, mollusks and birds. This trophic network is affected by the presence of toxic phytoplankton species. In July 2017, samples of phytoplankton were obtained from Paracas Bay, an important zone for scallop (Argopecten purpuratus) aquaculture in Peru. Morphological analysis revealed the presence of the genus Pseudo-nitzschia, which was isolated and cultivated in laboratory conditions. Subsequently, the monoclonal cultures were observed by scanning electron microscopy (SEM), and identified as P. multistriata, based on both the morphological characteristics, and internal transcribed spacers region (ITS2) sequence phylogenetic analysis. Toxin analysis using liquid chromatography (LC) with high-resolution mass spectrometry (HRMS) revealed the presence of domoic acid (DA) with an estimated amount of 0.004 to 0.010 pg cell−1. This is the first report of DA from the coastal waters of Peru and its detection in P. multistriata indicates that it is a potential risk. Based on our results, routine monitoring of this genus should be considered in order to ensure public health.

First report of the metacestode Caulobothrium sp. in the Peruvian scallop Argopecten purpuratus from Sechura Bay, Piura, Peru

2019 ◽  
Vol 118 (8) ◽  
pp. 2369-2376
Author(s):  
Teresa Castro ◽  
Dante R. Mateo ◽  
Spencer J. Greenwood ◽  
Enrique C. Mateo
Keyword(s):  
First Report ◽  
Argopecten Purpuratus

A fossil Aspergillus from Eocene Dominican amber

1988 ◽  
Vol 62 (01) ◽  
pp. 141-143 ◽  
Author(s):  
Gerard M. Thomas ◽  
George O. Poinar
Keyword(s):  
Dominican Republic ◽  
Fossil Species ◽  
First Report ◽  
Dominican Amber ◽  
Eocene Amber

A sporulating Aspergillus is described from a piece of Eocene amber originating from the Dominican Republic. The Aspergillus most closely resembles a form of the white spored phase of Aspergillus janus Raper and Thom. This is the first report of a fossil species of Aspergillus.

A scanning electron microscopic study of the veliger larvae of the scallop argopecten purpuratus

1988 ◽  
Vol 46 ◽  
pp. 284-285
Author(s):  
G.C. Bellolio ◽  
K.S. Lohrmann ◽  
E.M. Dupré
Keyword(s):  
Morphological Description ◽  
Electron Microscopic ◽  
Larval Stages ◽  
Scanning Electron Microscopic Study ◽  
The Pacific ◽  
Argopecten Purpuratus ◽  
Veliger Larvae ◽  
20 Nm ◽  
Ethanol Series ◽  
Scanning Electron

Argopecten purpuratus is a scallop distributed in the Pacific coast of Chile and Peru. Although this species is mass cultured in both countries there is no morphological description available of the development of this bivalve except for few characterizations of some larval stages described for culture purposes. In this work veliger larvae (app. 140 pm length) were examined by the scanning electron microscope (SEM) in order to study some aspects of the organogenesis of this species.Veliger larvae were obtained from hatchery cultures, relaxed with a solution of MgCl2 and killed by slow addition of 21 glutaraldehyde (GA) in seawater (SW). They were fixed in 2% GA in calcium free artificial SW (pH 8.3), rinsed 3 times in calcium free SW, and dehydrated in a graded ethanol series. The larvae were critical point dried and mounted on double scotch tape (DST). To permit internal view, some valves were removed by slightly pressing and lifting the tip of a cactus spine wrapped with DST, The samples were coated with 20 nm gold and examined with a JEOL JSM T-300 operated at 15 KV.

1392: First Report of a New Transurethral Detaching Prostatectomy of the Prostate (TUDP)

2005 ◽  
Vol 173 (4S) ◽  
pp. 377-378
Author(s):  
Yasunori Hiraoka ◽  
Kazuhiko Yamada ◽  
Yuji Shimizu ◽  
Hiroyuki Abe
Keyword(s):  
First Report
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