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Anthony S Clare - One of the best experts on this subject based on the ideXlab platform.
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correlation between surface chemistry and settlement behaviour in barnacle cyprids Balanus improvisus
Biofouling, 2014Co-Authors: A Di Fino, Luigi Petrone, Nick Aldred, Thomas Ederth, Bo Liedberg, Anthony S ClareAbstract:In laboratory-based biofouling assays, the influence of physico-chemical surface characteristics on barnacle settlement has been tested most frequently using the model organism Balanus amphitrite (= AmphiBalanus amphitrite). Very few studies have addressed the settlement preferences of other barnacle species, such as Balanus improvisus (= AmphiBalanus improvisus). This study aimed to unravel the effects of surface physico-chemical cues, in particular surface-free energy (SFE) and surface charge, on the settlement of cyprids of B. improvisus. The use of well-defined surfaces under controlled conditions further facilitates comparison of the results with recent similar data for B. amphitrite. Zero-day-old cyprids of B. improvisus were exposed to a series of model surfaces, namely self-assembled monolayers (SAMs) of alkanethiols with varying end-groups, homogenously applied to gold-coated polystyrene (PS) Petri dishes. As with B. amphitrite, settlement of cyprids of B. improvisus was influenced by both SFE an...
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construction of an adult barnacle Balanus amphitrite cdna library and selection of reference genes for quantitative rt pcr studies
BMC Molecular Biology, 2009Co-Authors: Tristano Bacchetti De Gregoris, Marco Borra, Elio Biffali, Thomas Bekel, Grant J Burgess, Richard R Kirby, Anthony S ClareAbstract:Background Balanus amphitrite is a barnacle commonly used in biofouling research. Although many aspects of its biology have been elucidated, the lack of genetic information is impeding a molecular understanding of its life cycle. As part of a wider multidisciplinary approach to reveal the biogenic cues influencing barnacle settlement and metamorphosis, we have sequenced and annotated the first cDNA library for B. amphitrite. We also present a systematic validation of potential reference genes for normalization of quantitative real-time PCR (qRT-PCR) data obtained from different developmental stages of this animal.
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Balanus amphitrite or amphiBalanus amphitrite a note on barnacle nomenclature
Biofouling, 2008Co-Authors: Anthony S Clare, Jens T HoegAbstract:In a recent revision of the Balanidae based on morphological systematics, the much studied fouling species Balanus amphitrite was renamed AmphiBalanus amphitrite. Here, the case is made for retaining the former nomenclature. Taxonomists are urged to exercise caution before introducing new formal taxonomies, which should ideally be based on several independent lines of evidence.
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isethionic acid and floridoside isolated from the red alga grateloupia turuturu inhibit settlement of Balanus amphitrite cyprid larvae
Biofouling, 2004Co-Authors: Claire Hellio, Anthony S Clare, Christelle Simoncolin, Eric DeslandesAbstract:Isethionic acid (2-hydroxyethane sulfonic acid) and floridoside (2-O-α-D-galactopyranosylglycerol) were extracted from the red alga, Grateloupia turuturu, and tested for anti-settlement activity against cyprid larvae of the tropical barnacle, Balanus amphitrite and for their toxicity to nauplius larvae. Isethionic acid was active for anti-settlement but had the disadvantage of being toxic to nauplius larvae. Floridoside was a potent inhibitor of cyprid settlement at non-toxic concentrations to nauplii (0.01 mg ml−1).
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on the antennular secretion of the cyprid of Balanus amphitrite amphitrite and its role as a settlement pheromone
Journal of the Marine Biological Association of the United Kingdom, 1994Co-Authors: Anthony S Clare, Rebecca K Freet, Marion McclaryAbstract:In exploring a substratum, Balanus amphitrite amphitrite Darwin (Crustacea: Cirripedia) cyprids deposit ‘footprints’ of antennular secretion. The results of in vitro settlement assays suggest that in addition to serving as a temporary adhesive, the secretion acts as a pheromone, in that its presence induces the settlement of conspecific cyprids. This result is in accord with a previous study on Balanus balanoides (L.)( =SemiBalanus balanoides ). In settlement assays, the pheromone is likely to contribute to an observed positive linear relationship between settlement and cyprid density. The density effect should thus be an important consideration in the design of barnacle settlement assays. In the field, cyprid searching behaviour may render a surface more attractive to settlement by cypris larvae.
Ryusuke Kado - One of the best experts on this subject based on the ideXlab platform.
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invasion of japanese shores by the ne pacific barnacle Balanus glandula and its ecological and biogeographical impact
Marine Ecology Progress Series, 2003Co-Authors: Ryusuke KadoAbstract:A common littoral barnacle, Balanus glandula Darwin, 1854 (Crustacea, Cirripedia) from the west coast of North America has become established in the mid-littoral zone of harbors on the Pacific side of northern Honshu, Japan. The new immigrant occupies space in the lower half of the Chthamalus spp. and Balanus albicostatus zones, and in the upper fringe of the SemiBalanus cariosus zone. However, the species has not been detected in harbors along the Sea of Japan, south of the Ozika Peninsula, northern Honshu, and to the north and east of Kushiro, Hokkaido. Considering its present distribution, shell sizes, and abundance, it is most likely that it was introduced into 3 separate port areas in NE Honshu, Japan, during the last 20 to 40 yr, probably by anthropogenic activities. It was apparently also introduced to the La Plata estuary, Argentina, during the same period. B. glandula is becoming a dominant littoral zone species, especially in embayments, largely at the expense of the tropical endemic B. albicostatus in the upper littoral fringe. Taking into account the biogeographical distribution of common Japanese barnacles in relation to water temperature, the future distribution of the newly introduced species is considered.
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Effect of Light on the Larval Development of Balanus amphitrite Darwin(Cirripedia).
Nippon Suisan Gakkaishi, 1991Co-Authors: Ryusuke KadoAbstract:Balanus amphitrite larvae were reared to select the best algal diet and to determine the effect of light on the larval development. Chaetoceros calcitrans was found to have the best food value as Skeletonema costatum among five algal diets tested. The larval growth speed was not affected by the light when the ample amount of C. calcitrans was supplied. So did the difference in the light-dark frequencies (18L6D, 6×3L1D) neither. This fact suggests that light itself has little effect on larval development when the supplied food is sufficient for the larvae to grow.
Denis Dubourdieu - One of the best experts on this subject based on the ideXlab platform.
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Reassessment of phenotypic traits for Saccharomyces bayanus var. uvarum wine yeast strains.
International Journal of Food Microbiology, 2010Co-Authors: Isabelle Masneuf-pomarede, Marina Bely, Philippe Marullo, Aline Lonvaud-funel, Denis DubourdieuAbstract:Among Saccharomyces yeast, S. cerevisiae and S. bayanus var. uvarum are related species, sharing the same ecosystem in sympatry. The physiological and technological properties of a large collection of genetically-identified S. bayanus var. uvarum wine strains were investigated in a biometric study and their fermentation behavior was compared at 24 °C and 13 °C. The variability of the phenotypic traits was considered at both intraspecific and interspecific levels. Low ethanol tolerance at 24 °C and production of high levels of 2-phenylethanol and its acetate were clearly revealed as discriminative technological traits, distinguishing the S. bayanus var. uvarum strains from S. cerevisiae. Although some S. bayanus var. uvarum strains produced very small amounts of acetic acid, this was not a species-specific trait, as the distribution of values was similar in both species. Fermentation kinetics at 24 °C showed that S. bayanus var. uvarum maintained a high fermentation rate after Vmax, with low nitrogen requirements, but stuck fermentations were observed at later stages. In contrast, a shorter lag phase compared with S.cerevisiae, higher cell viability, and the ability to complete alcoholic fermentation at 13 °C confirmed the low-temperature adaptation trait of S.bayanus var. uvarum. This study produced a phenotypic characterization data set for a collection of S. bayanus var. uvarum strains, thus paving the way for industrial developments using this species as a new genetic resource.
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Reassessment of phenotypic traits for Saccharomyces bayanus var. uvarum wine yeast strains.
International journal of food microbiology, 2010Co-Authors: Isabelle Masneuf-pomarede, Marina Bely, Philippe Marullo, Aline Lonvaud-funel, Denis DubourdieuAbstract:Among Saccharomyces yeast, S. cerevisiae and S. bayanus var. uvarum are related species, sharing the same ecosystem in sympatry. The physiological and technological properties of a large collection of genetically-identified S. bayanus var. uvarum wine strains were investigated in a biometric study and their fermentation behavior was compared at 24 degrees C and 13 degrees C. The variability of the phenotypic traits was considered at both intraspecific and interspecific levels. Low ethanol tolerance at 24 degrees C and production of high levels of 2-phenylethanol and its acetate were clearly revealed as discriminative technological traits, distinguishing the S. bayanus var. uvarum strains from S. cerevisiae. Although some S. bayanus var. uvarum strains produced very small amounts of acetic acid, this was not a species-specific trait, as the distribution of values was similar in both species. Fermentation kinetics at 24 degrees C showed that S. bayanus var. uvarum maintained a high fermentation rate after Vmax, with low nitrogen requirements, but stuck fermentations were observed at later stages. In contrast, a shorter lag phase compared with S.cerevisiae, higher cell viability, and the ability to complete alcoholic fermentation at 13 degrees C confirmed the low-temperature adaptation trait of S.bayanus var. uvarum. This study produced a phenotypic characterization data set for a collection of S. bayanus var. uvarum strains, thus paving the way for industrial developments using this species as a new genetic resource.
Evangelina Schwindt - One of the best experts on this subject based on the ideXlab platform.
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salt marsh colonization by a rocky shore invader Balanus glandula darwin 1854 spreads along the patagonian coast
Biological Invasions, 2009Co-Authors: Evangelina Schwindt, Alejandro Bortolus, Yanina L Idaszkin, Veronica Savoya, Maria M MendezAbstract:Balanus glandula, an east Pacific acorn barnacle from rocky shores, was introduced to Mar del Plata, Argentina more than 40 years ago and has spread over 17 latitudinal degrees southward. Here we report the first record of this species living in a soft-bottom environment colonizing the salt marsh plant species Limonium brasiliense, Spartina densiflora, S. alterniflora and Sarcocornia perennis. In addition, we describe the size frequency distribution, density and spatial distribution of the barnacles colonizing the different plant species. The size frequency distribution of Balanus showed a bimodal pattern in all plants. Barnacles were mostly large in S. densiflora, but small in S. alterniflora, with more balanced distributions of small and large barnacles on S. perennis and L. brasiliense. The highest density of barnacles was observed on S. perennis (x = 35.8 ind/cm2, SD = 40.5) and S. alterniflora (x = 33.8 ind/cm2, SD = 23), while the lowest on L. brasiliense (x = 1.5 ind/cm2, SD = 1.18) and S. densiflora (x = 0.17 ind/cm2, SD = 0.09). More than 90% of the barnacles on any given plant were found living. While barnacles colonized only the first few centimeters above the soil surface level in S. alterniflora and L. brasiliense, they reached their highest point on S. perennis. The finding of a rocky shore species successfully colonizing soft-bottom marshes within an invaded region brings new perspectives to discussions in biological invasion ecology, and raises additional considerations for coastal environmental management.
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the invasion of the acorn barnacle Balanus glandula in the south western atlantic 40 years later
Journal of the Marine Biological Association of the United Kingdom, 2007Co-Authors: Evangelina SchwindtAbstract:The acorn barnacle Balanus glandula (Darwin 1854) is native to the Pacific coast of North America and was accidentally introduced in Argentina in the early 1970s. Here the invasion status of this species is reviewed in the south-western Atlantic focusing on geographical patterns of density, cover, biomass, size and recruitment, and also estimating its rate of spread. Field surveys along rocky shores and a literature review show that B. glandula invaded most of the rocky shores of Argentina at a high rate of spread. Density and cover of barnacles do not follow a latitudinal trend; instead both variables show a bimodal pattern with the highest values in two distant locations (Puerto Lobos and Bahia Bustamante). However, the size of the barnacles increases with latitude, and is positively related to biomass. Recruitment of this species varies between wave exposed and protected areas, and over time. At lower latitudes barnacles recruit in winter, while at higher latitudes they recruit in spring and summer. The differences observed in density and recruitment suggest that along the Argentinean coast, oceanographic processes have a stronger influence in the distribution and success of the barnacles than the gradient in wave exposure. Balanus glandula is a successful invader which has completely re-shaped the native intertidal landscape. Moreover, considering the wide temperature range that this barnacle tolerates in native and invaded regions, the entire coastline of South America could be colonized by this species in the future.
Jens T Hoeg - One of the best experts on this subject based on the ideXlab platform.
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Balanus amphitrite or amphiBalanus amphitrite a note on barnacle nomenclature
Biofouling, 2008Co-Authors: Anthony S Clare, Jens T HoegAbstract:In a recent revision of the Balanidae based on morphological systematics, the much studied fouling species Balanus amphitrite was renamed AmphiBalanus amphitrite. Here, the case is made for retaining the former nomenclature. Taxonomists are urged to exercise caution before introducing new formal taxonomies, which should ideally be based on several independent lines of evidence.
