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Weiming Li - One of the best experts on this subject based on the ideXlab platform.
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waterborne pheromones modulate gonadotropin inhibitory hormone levels in sea lamprey Petromyzon marinus
General and Comparative Endocrinology, 2020Co-Authors: Yu Wen Chungdavidson, Skye D Fissette, Belinda Huerta, Ugo Bussy, Weiming LiAbstract:Abstract The relationships between pheromone stimuli and neuropeptides are not well established in vertebrates due to the limited number of unequivocally identified pheromone molecules. The sea lamprey (Petromyzon marinus) is an advantageous vertebrate model to study the effects of pheromone exposure on neuropeptides since many pheromone molecules and neuropeptides have been identified in this species. Sexually mature male sea lamprey release pheromones 7α, 12α, 24-trihydroxy-5α-cholan-3-one 24-sulfate (3 keto-Petromyzonol sulfate, 3kPZS) and 7α, 12α-dihydroxy-5α-cholan-3-one-24-oic acid (3-keto allocholic acid, 3kACA) that differentially regulate gonadotropin-releasing hormone (lGnRH) and steroid levels in sexually immature sea lamprey. However, the effects of these pheromones on gonadotropin-inhibitory hormones (GnIHs), hypothalamic neuropeptides that regulate lGnRH release, are still elusive. In this report, we sought to examine the effects of waterborne pheromones on lamprey GnIH-related neuropeptide levels in sexually immature sea lamprey. Ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) analyses revealed sex differences in GnIH-related neuropeptide levels in the brain and plasma of immature sea lamprey. Exposure to 3kPZS and 3kACA exerted differential effects on GnIH-related neuropeptide levels in both sexes, but the effects were more prominent in female brains. We conclude that sea lamprey pheromones regulate GnIH-related neuropeptide levels in a sexually dimorphic manner.
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petromylidenes a c 2 alkylidene bile salt derivatives isolated from sea lamprey Petromyzon marinus
Marine Drugs, 2018Co-Authors: Ke Li, Anne M. Scott, Joseph J. Riedy, Skye Fissette, Tyler J. Buchinger, Weiming LiAbstract:Three novel bile acid derivatives, petromylidenes A–C (1–3), featuring uncommon alkylidene adductive scaffolds, were isolated from water conditioned with sexually mature male sea lampreys (Petromyzon marinus). Their structures were elucidated by mass spectrometry and NMR spectroscopy, and by comparison to spectral data of related structures. The identification of compounds 1–3, further illustrates the structural diversity of the 5α bile salt family. Compounds 1–3 exhibited notable biological properties as well, including high olfactory potencies in adult sea lampreys and strong behavioral attraction of ovulated female sea lampreys. Electro-olfactogram recordings indicated that the limit of detection for 1 was 10−9 M, 2 was 10−11 M, and 3 was less than 10−13 M. These results suggested 1–3 were likely male pheromones, which guide reproductive behaviors in the sea lamprey.
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Three Novel Bile Alcohols of Mature Male Sea Lamprey (Petromyzon marinus) Act as Chemical Cues for Conspecifics
Journal of Chemical Ecology, 2017Co-Authors: Ke Li, Anne M. Scott, Joseph J. Riedy, Skye Fissette, Zoe E. Middleton, Weiming LiAbstract:Sea lamprey, Petromyzon marinus , rely heavily on chemical cues that mediate their life history events, such as migration and reproduction. Here, we describe Petromyzone A–C ( 1 – 3 ), three novel bile alcohols that are highly oxidized and sulfated, isolated from water conditioned with spermiated male sea lamprey. Structures of these compounds were unequivocally established by spectroscopic analyses and by comparison with spectra of known compounds. Electro-olfactogram recordings showed that 1 at 10^−11 M was stimulatory to the adult sea lamprey olfactory epithelium, while 2 and 3 were stimulatory at 10^−13 M. Behavioral assays indicated that 1 is attractive, 2 is not attractive or repulsive, and 3 is repulsive to ovulated female sea lamprey. The results suggest that 1 and 2 may be putative pheromones that mediate chemical communication in sea lamprey. The identification of these three components enhances our understanding of the structures and functions of sex pheromone components in this species and may provide useful behavioral manipulation tools for the integrated management of sea lamprey, a destructive invader in the Laurentian Great Lakes.
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differential effects of sex pheromone compounds on adult female sea lamprey Petromyzon marinus locomotor patterns
Journal of Biological Rhythms, 2016Co-Authors: Erin J Walaszczyk, Benjamin Goheen, Juan P Steibel, Weiming LiAbstract:Synchronization of male and female locomotor activity plays a critical role in ensuring reproductive success, especially in semelparous species. The goal of this study was to elucidate the effects of individual chemical signals, or pheromones, on the locomotor activity in the sea lamprey (Petromyzon marinus). In their native habitat, adult preovulated females (POF) and ovulated females (OF) are exposed to sex pheromone compounds that are released from spermiated males and attract females to nests during their migration and spawning periods. In this study, locomotor activity of individual POF and OF was measured hourly in controlled laboratory conditions using an automated video-tracking system. Differences in the activity between a baseline day (no treatment exposure) and a treatment day (sex pheromone compound or control exposure) were examined for daytime and nighttime periods. Results showed that different pheromone compound treatments affected both POF and OF sea lamprey (p < 0.05) but in different wa...
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chemical cues and pheromones in the sea lamprey Petromyzon marinus
Frontiers in Zoology, 2015Co-Authors: Tyler J. Buchinger, Michael J Siefkes, Barbara S Zielinski, Cory O Brant, Weiming LiAbstract:Chemical cues and pheromones guide decisions in organisms throughout the animal kingdom. The neurobiology, function, and evolution of olfaction are particularly well described in insects, and resulting concepts have driven novel approaches to pest control. However, aside from several exceptions, the olfactory biology of vertebrates remains poorly understood. One exception is the sea lamprey (Petromyzon marinus), which relies heavily upon olfaction during reproduction. Here, we provide a broad review of the chemical cues and pheromones used by the sea lamprey during reproduction, including overviews of the sea lamprey olfactory system, chemical cues and pheromones, and potential applications to population management. The critical role of olfaction in mediating the sea lamprey life cycle is evident by a well-developed olfactory system. Sea lamprey use chemical cues and pheromones to identify productive spawning habitat, coordinate spawning behaviors, and avoid risk. Manipulation of olfactory biology offers opportunities for management of populations in the Laurentian Great Lakes, where the sea lamprey is a destructive invader. We suggest that the sea lamprey is a broadly useful organism with which to study vertebrate olfaction because of its simple but well-developed olfactory organ, the dominant role of olfaction in guiding behaviors during reproduction, and the direct implications for vertebrate pest management.
Michael J Siefkes - One of the best experts on this subject based on the ideXlab platform.
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an adaptive management implementation framework for evaluating supplemental sea lamprey Petromyzon marinus controls in the laurentian great lakes
Journal of Great Lakes Research, 2021Co-Authors: Sean A Lewandoski, Michael J Siefkes, Travis O Brenden, Nicholas S JohnsonAbstract:Abstract Invasive sea lamprey (Petromyzon marinus) populations in the Laurentian Great Lakes Basin have been suppressed for over 60 years primarily by migration barriers and lamprey-specific pesticides. Improving control outcomes by supplementing barriers and pesticides with additional control strategies has been a long-standing objective of managers and stakeholders, but progress towards this objective has been limited. We developed an adaptive management implementation framework and applied it to this objective. The framework consists of a set of adaptive management implementation goals (develop effective monitoring practices, develop effective participatory process, and conduct management experiments), a set of aspirational targets hypothesized to be related to Sea Lamprey Control Program adaptive capacity (multi-level political and social organization, creation of safe-to-fail decision making arenas, and effective use of multi-criteria decision analysis), and a feedback loop linking adaptive capacity and progress towards adaptive management implementation goals. Progress towards improving sea lamprey control outcomes by integrating supplemental control strategy into the Sea Lamprey Control Program may be possible through adaptive management implementation.
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chemical cues and pheromones in the sea lamprey Petromyzon marinus
Frontiers in Zoology, 2015Co-Authors: Tyler J. Buchinger, Michael J Siefkes, Barbara S Zielinski, Cory O Brant, Weiming LiAbstract:Chemical cues and pheromones guide decisions in organisms throughout the animal kingdom. The neurobiology, function, and evolution of olfaction are particularly well described in insects, and resulting concepts have driven novel approaches to pest control. However, aside from several exceptions, the olfactory biology of vertebrates remains poorly understood. One exception is the sea lamprey (Petromyzon marinus), which relies heavily upon olfaction during reproduction. Here, we provide a broad review of the chemical cues and pheromones used by the sea lamprey during reproduction, including overviews of the sea lamprey olfactory system, chemical cues and pheromones, and potential applications to population management. The critical role of olfaction in mediating the sea lamprey life cycle is evident by a well-developed olfactory system. Sea lamprey use chemical cues and pheromones to identify productive spawning habitat, coordinate spawning behaviors, and avoid risk. Manipulation of olfactory biology offers opportunities for management of populations in the Laurentian Great Lakes, where the sea lamprey is a destructive invader. We suggest that the sea lamprey is a broadly useful organism with which to study vertebrate olfaction because of its simple but well-developed olfactory organ, the dominant role of olfaction in guiding behaviors during reproduction, and the direct implications for vertebrate pest management.
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application of a putative alarm cue hastens the arrival of invasive sea lamprey Petromyzon marinus at a trapping location
Canadian Journal of Fisheries and Aquatic Sciences, 2015Co-Authors: John B Hume, Thomas M Luhring, Michael J Siefkes, Nicholas S Johnson, Trevor D Meckley, Michael C WagnerAbstract:The sea lamprey Petromyzon marinus is an invasive pest in the Laurentian Great Lakes basin, threatening the persistence of important commercial and recreational fisheries. There is substantial interest in developing effective trapping practices via the application of behavior-modifying semiochemicals (odors). Here we report on the effectiveness of utilizing repellent and attractant odors in a push–pull configuration, commonly employed to tackle invertebrate pests, to improve trapping efficacy at permanent barriers to sea lamprey migration. When a half-stream channel was activated by a naturally derived repellent odor (a putative alarm cue), we found that sea lamprey located a trap entrance significantly faster than when no odor was present as a result of their redistribution within the stream. The presence of a partial sex pheromone, acting as an attractant within the trap, was not found to further decrease the time to when sea lamprey located a trap entrance relative to when the alarm cue alone was appli...
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application of a putative alarm cue hastens the arrival of invasive sea lamprey Petromyzon marinus at a trapping location
Canadian Journal of Fisheries and Aquatic Sciences, 2015Co-Authors: John B Hume, Thomas M Luhring, Michael J Siefkes, Nicholas S Johnson, Trevor D Meckley, Michael C WagnerAbstract:The sea lamprey Petromyzon marinus is an invasive pest in the Laurentian Great Lakes basin, threatening the persistence of important commercial and recreational fisheries. There is substantial inte...
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mercury accumulation in sea lamprey Petromyzon marinus from lake huron
Science of The Total Environment, 2014Co-Authors: Charles P Madenjian, Michael J Siefkes, John M Dettmers, Nicholas S Johnson, Joel D. Blum, Marcus W JohnsonAbstract:We determined whole-fish total mercury (Hg) concentrations of 40 male and 40 female adult sea lampreys (Petromyzon marinus) captured in the Cheboygan River, a tributary to Lake Huron, during May 2011. In addition, bioenergetics modeling was used to explore the effects of sex-related differences in activity and resting (standard) metabolic rate (SMR) on mercury accumulation. The grand mean for Hg concentrations was 519 ng/g (standard error of the mean = 46 ng/g). On average, males were 16% higher in Hg concentration than females. Bioenergetics modeling results indicated that 14% higher activity and SMR in males would account for this observed sex difference in Hg concentrations. We concluded that the higher Hg concentration in males was most likely due to higher rate of energy expenditure in males, stemming from greater activity and SMR. Our findings have implications for estimating the effects of sea lamprey populations on mercury cycling within ecosystems, as well as for the proposed opening of sea lamprey fisheries. Eventually, our results may prove useful in improving control of sea lamprey, a pest responsible for substantial damage to fisheries in lakes where it is not native.
Nicholas S Johnson - One of the best experts on this subject based on the ideXlab platform.
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an adaptive management implementation framework for evaluating supplemental sea lamprey Petromyzon marinus controls in the laurentian great lakes
Journal of Great Lakes Research, 2021Co-Authors: Sean A Lewandoski, Michael J Siefkes, Travis O Brenden, Nicholas S JohnsonAbstract:Abstract Invasive sea lamprey (Petromyzon marinus) populations in the Laurentian Great Lakes Basin have been suppressed for over 60 years primarily by migration barriers and lamprey-specific pesticides. Improving control outcomes by supplementing barriers and pesticides with additional control strategies has been a long-standing objective of managers and stakeholders, but progress towards this objective has been limited. We developed an adaptive management implementation framework and applied it to this objective. The framework consists of a set of adaptive management implementation goals (develop effective monitoring practices, develop effective participatory process, and conduct management experiments), a set of aspirational targets hypothesized to be related to Sea Lamprey Control Program adaptive capacity (multi-level political and social organization, creation of safe-to-fail decision making arenas, and effective use of multi-criteria decision analysis), and a feedback loop linking adaptive capacity and progress towards adaptive management implementation goals. Progress towards improving sea lamprey control outcomes by integrating supplemental control strategy into the Sea Lamprey Control Program may be possible through adaptive management implementation.
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gut microbiota associated with different sea lamprey Petromyzon marinus life stages
Frontiers in Microbiology, 2021Co-Authors: Prince P Mathai, Nicholas S Johnson, Muruleedhara N Byappanahalli, Michael J SadowskyAbstract:Sea lamprey (SL; Petromyzon marinus), one of the oldest living vertebrates, have a complex metamorphic life cycle. Following hatching, SL transition into a microphagous, sediment burrowing larval stage, and after 2-10+ years, the larvae undergo a dramatic metamorphosis, transforming into parasitic juveniles that feed on blood and bodily fluids of fishes; adult lamprey cease feeding, spawn, and die. Since gut microbiota are critical for the overall health of all animals, we examined the microbiota associated with SLs in each life history stage. We show that there were significant differences in the gut bacterial communities associated with the larval, parasitic juvenile, and adult life stages. The transition from larval to the parasitic juvenile stage was marked with a significant shift in bacterial community structure and reduction in alpha diversity. The most abundant SL-associated phyla were Proteobacteria, Fusobacteria, Bacteroidetes, Verrucomicrobia, Actinobacteria, and Firmicutes, with their relative abundances varying among the stages. Moreover, while larval SL were enriched with unclassified Fusobacteriaceae, unclassified Verrucomicrobiales and Cetobacterium, members of the genera with fastidious nutritional requirements, such as Streptococcus, Haemophilus, Cutibacterium, Veillonella, and Massilia, were three to four orders of magnitude greater in juveniles than in larvae. In contrast, adult SLs were enriched with Aeromonas, Iodobacter, Shewanella, and Flavobacterium. Collectively, our findings show that bacterial communities in the SL gut are dramatically different among its life stages. Understanding how these communities change over time within and among SL life stages may shed more light on the role that these gut microbes play in host growth and fitness.
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Push and pull of downstream moving juvenile sea lamprey (Petromyzon marinus) exposed to chemosensory and light cues
Conservation Physiology, 2019Co-Authors: Nicholas S Johnson, Scott M. Miehls, Alex Haro, Michael WagnerAbstract:Visual and olfactory stimuli induce behavioural responses in fishes when applied independently, but little is known about how simultaneous exposure influences behaviour, especially in downstream migrating fishes. Here, downstream moving juvenile sea lamprey (Petromyzon marinus) were exposed to light and a conspecific chemosensory alarm cue in a flume and movement were monitored with overhead cameras and nets. When exposed to light, sea lamprey were more likely to be captured in a net closest to the light array. When exposed to the alarm cue, sea lamprey transit rate through the flume increased, but sea lamprey did not avoid the alarm cue plume by moving perpendicular to flow. When the alarm cue and light were applied simultaneously in a push and pull configuration, the alarm cue still triggered enhanced downstream movement (push downstream) and more sea lamprey was still captured in the net nearest the light (pull to the side), resulting in twice as many sea lamprey being captured in the lighted net relative to controls. To our knowledge, this is the first study using multiple sensory cues in a push-pull configuration to modulate fish outmigration. Push and pull of juvenile sea lamprey with sensory cues could be useful to reduce turbine entrainment where native and enhance trap catch where invasive.
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evaluating potential artefacts of photo reversal on behavioural studies with nocturnal invasive sea lamprey Petromyzon marinus
Canadian Journal of Zoology, 2016Co-Authors: M Barnett, C M Wagner, Nicholas S Johnson, Istvan Imre, R T Di Rocco, Grant E BrownAbstract:Sea lampreys (Petromyzon marinus L., 1758) are nocturnal, so experiments evaluating their behaviour to chemosensory cues have typically been conducted at night. However, given the brief timeframe each year that adult P. marinus are available for experimentation, we investigated whether P. marinus exposed to a 12 h shifted diurnal cycle (reversed photoperiod) could be tested in a darkened arena during the day and show the same response to chemosensory cues as natural photoperiod P. marinus that were tested during the night. Ten replicates of 10 P. marinus, from each photoperiod, were exposed to deionized water (negative control), 2-phenylethylamine hydrochloride (PEA HCl, putative predator cue), or P. marinus whole-body extract (conspecific alarm cue). All P. marinus demonstrated a significant avoidance response to both cues. No significant differences were found in avoidance to PEA HCl between photoperiods. Avoidance of P. marinus whole-body extract was significantly stronger in natural compared with reve...
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application of a putative alarm cue hastens the arrival of invasive sea lamprey Petromyzon marinus at a trapping location
Canadian Journal of Fisheries and Aquatic Sciences, 2015Co-Authors: John B Hume, Thomas M Luhring, Michael J Siefkes, Nicholas S Johnson, Trevor D Meckley, Michael C WagnerAbstract:The sea lamprey Petromyzon marinus is an invasive pest in the Laurentian Great Lakes basin, threatening the persistence of important commercial and recreational fisheries. There is substantial interest in developing effective trapping practices via the application of behavior-modifying semiochemicals (odors). Here we report on the effectiveness of utilizing repellent and attractant odors in a push–pull configuration, commonly employed to tackle invertebrate pests, to improve trapping efficacy at permanent barriers to sea lamprey migration. When a half-stream channel was activated by a naturally derived repellent odor (a putative alarm cue), we found that sea lamprey located a trap entrance significantly faster than when no odor was present as a result of their redistribution within the stream. The presence of a partial sex pheromone, acting as an attractant within the trap, was not found to further decrease the time to when sea lamprey located a trap entrance relative to when the alarm cue alone was appli...
Michael C Wagner - One of the best experts on this subject based on the ideXlab platform.
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application of a putative alarm cue hastens the arrival of invasive sea lamprey Petromyzon marinus at a trapping location
Canadian Journal of Fisheries and Aquatic Sciences, 2015Co-Authors: John B Hume, Thomas M Luhring, Michael J Siefkes, Nicholas S Johnson, Trevor D Meckley, Michael C WagnerAbstract:The sea lamprey Petromyzon marinus is an invasive pest in the Laurentian Great Lakes basin, threatening the persistence of important commercial and recreational fisheries. There is substantial interest in developing effective trapping practices via the application of behavior-modifying semiochemicals (odors). Here we report on the effectiveness of utilizing repellent and attractant odors in a push–pull configuration, commonly employed to tackle invertebrate pests, to improve trapping efficacy at permanent barriers to sea lamprey migration. When a half-stream channel was activated by a naturally derived repellent odor (a putative alarm cue), we found that sea lamprey located a trap entrance significantly faster than when no odor was present as a result of their redistribution within the stream. The presence of a partial sex pheromone, acting as an attractant within the trap, was not found to further decrease the time to when sea lamprey located a trap entrance relative to when the alarm cue alone was appli...
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application of a putative alarm cue hastens the arrival of invasive sea lamprey Petromyzon marinus at a trapping location
Canadian Journal of Fisheries and Aquatic Sciences, 2015Co-Authors: John B Hume, Thomas M Luhring, Michael J Siefkes, Nicholas S Johnson, Trevor D Meckley, Michael C WagnerAbstract:The sea lamprey Petromyzon marinus is an invasive pest in the Laurentian Great Lakes basin, threatening the persistence of important commercial and recreational fisheries. There is substantial inte...
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coastal movements of migrating sea lamprey Petromyzon marinus in response to a partial pheromone added to river water implications for management of invasive populations
Canadian Journal of Fisheries and Aquatic Sciences, 2014Co-Authors: Trevor D Meckley, Michael C Wagner, Eliezer GurarieAbstract:How sea lampreys (Petromyzon marinus) search for and select reproductive habitat is poorly understood. Manual tracking of acoustically tagged migrants confirms the hypothesis that sea lampreys tran...
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a synthesized mating pheromone component increases adult sea lamprey Petromyzon marinus trap capture in management scenarios
Canadian Journal of Fisheries and Aquatic Sciences, 2013Co-Authors: Nicholas S Johnson, Michael J Siefkes, Todd B Steeves, Michael C Wagner, Heather A Dawson, Huiyong Wang, Michael B Twohey, Weiming LiAbstract:Application of chemical cues to manipulate adult sea lamprey (Petromyzon marinus) behavior is among the options considered for new sea lamprey control techniques in the Laurentian Great Lakes. A male mating pheromone component, 7,12,24-trihydroxy-3-one-5-cholan-24-sulfate (3kPZS), lures ovulated female sea lamprey upstream into baited traps in exper- imental contexts with no odorant competition. A critical knowledge gap is whether this single pheromone component influ- ences adult sea lamprey behavior in management contexts containing free-ranging sea lampreys. A solution of 3kPZS to reach a final in-stream concentration of 10−12 mol·L−1 was applied to eight Michigan streams at existing sea lamprey traps over 3 years, and catch rates were compared between paired 3kPZS-baited and unbaited traps. 3kPZS-baited traps captured significantly more sexually immature and mature sea lampreys, and overall yearly trapping efficiency within a stream averaged 10% higher during years when 3kPZS was applied. Video analysis of a trap funnel showed that the likelihood of sea lamprey trap entry after trap encounter was higher when the trap was 3kPZS baited. Our approach serves as a model for the development of similar control tools for sea lamprey and other aquatic invaders. Resume : L'utilisation de signaux chimiques pour manipuler le comportement de lamproies marines (Petromyzon marinus) adultes est une des options examinees parmi les nouvelles techniques de controle des lamproies dans les Grands Lacs lauren- tiens. Un compose pheromonal d'accouplement mâle, le 7,12,24-trihydroxy-3-one-5-cholan-24-sulfate (3kPZS), attire les lamproies femelles ovulees vers l'amont dans des cages appâtees en contexte experimental sans concurrence olfactive. Une lacune critique sur le plan des connaissances consiste asavoir si ce seul compose pheromonal influence le comportement des lamproies marines adultes dans des contextes de gestion contenant des lamproies marines en liberte. Une solution de 10−12 mol·L −1 3kPZS a ete appliquee ahuit cours d'eau du Michigan en des endroits ou sont disposees de cages alamproies sur une periode de trois ans, et une comparaison des taux de prises de cages appâtees au 3kPZS et non appâtees jumelees a ete effectuee. Des nombres significativement plus grands de lamproies sexuellement immatures et matures ont ete capturees dans les cages appâtees, et l'efficacite annuelle globale des cages dans un cours d'eau donne etait en moyenne 10 % plus elevee durant les annees ou du 3kPZS avait ete applique. L'analyse video de la goulotte d'une cage a demontre que la probabilite qu'une lamproie entre dans une cage apres avoir decele sa presence etait plus elevee quand la cage etait appâtee avec du 3kPZS. Notre approche constitue un modele pour la mise au point d'outils de controle semblables des lamproies marines et autres especes aquatiques envahissantes. (Traduit par la Redaction)
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a synthesized mating pheromone component increases adult sea lamprey Petromyzon marinus trap capture in management scenarios
Canadian Journal of Fisheries and Aquatic Sciences, 2013Co-Authors: Nicholas S Johnson, Michael J Siefkes, Todd B Steeves, Michael C Wagner, Heather A Dawson, Huiyong Wang, Michael B TwoheyAbstract:Application of chemical cues to manipulate adult sea lamprey (Petromyzon marinus) behavior is among the options considered for new sea lamprey control techniques in the Laurentian Great Lakes. A ma...
Peter W Sorensen - One of the best experts on this subject based on the ideXlab platform.
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olfactory mediated stream finding behavior of migratory adult sea lamprey Petromyzon marinus
Canadian Journal of Fisheries and Aquatic Sciences, 2011Co-Authors: Lance A Vrieze, Peter W Sorensen, Roger Bergstedtr A A BergstedtAbstract:Stream-finding behavior of adult sea lamprey (Petromyzon marinus), an anadromous fish that relies on pheromones to locate spawning streams, was documented in the vicinity of an important spawning river in the Great Lakes. Untreated and anosmic migrating sea lampreys were implanted with acoustic transmitters and then released outside the Ocqueoc River. Lampreys swam only at night and then actively. When outside of the river plume, lampreys pursued relatively straight bearings parallel to the shoreline while making frequent vertical excursions. In contrast, when within the plume, lampreys made large turns and exhibited a weak bias towards the river mouth, which one-third of them entered. The behavior of anosmic lampreys resembled that of untreated lampreys outside of the plume, except they pursued a more northerly compass bearing. To locate streams, sea lampreys appear to employ a three-phase odor-mediated strategy that involves an initial search along shorelines while casting vertically, followed by river-...
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synthesis and olfactory activity of unnatural sulfated 5β bile acid derivatives in the sea lamprey Petromyzon marinus
Steroids, 2011Co-Authors: Aaron C Burns, Peter W Sorensen, Thomas R HoyeAbstract:Abstract A variety of unnatural bile acid derivatives ( 9a – 9f ) was synthesized and used to examine the specificity with which the sea lamprey ( Petromyzon marinus ) olfactory system detects these compounds. These compounds are analogs of Petromyzonol sulfate (PS, 1 ), a component of the sea lamprey migratory pheromone. Both the stereochemical configuration at C5 (i.e., 5α vs. 5β) and the extent and sites of oxygenation (hydroxylation or ketonization) of the bile acid derived steroid skeleton were evaluated by screening the compounds for olfactory activity using electro-olfactogram recording. 5β-Petromyzonol sulfate ( 9a ) elicited a considerable olfactory response at sub-nanomolar concentration. In addition, less oxygenated systems (i.e., 9b – 9e ) elicited olfactory responses, albeit with less potency. The sea lamprey sex pheromone mimic 9f (5β-3-ketoPetromyzonol sulfate) was also examined and found to produce a much lower olfactory response. Mixture studies conducted with 9a and PS ( 1 ) suggest that stimulation is occurring via similar modes of activation, demonstrating a relative lack of specificity for recognition of the allo-configuration (i.e., 5α) in sea lamprey olfaction. This attribute could facilitate design of pheromone analogs to control this invasive species.
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importance of the olfactory sense to migratory sea lampreys Petromyzon marinus seeking riverine spawning habitat
Journal of Fish Biology, 2010Co-Authors: Lance A Vrieze, Rickard Bjerselius, Peter W SorensenAbstract:This study tested the hypothesis that the sea lamprey Petromyzon marinus, a diadromous species of fish, relies on innately discerned odours, including pheromones, to locate riverine spawning habitat. Migratory, sexually immature P. marinus were captured as they entered streams flowing into the Great Lakes, and their olfactory systems were occluded or not by injecting either innocuous dental impression material or a saline control into their nasopores. Animals were then released back into lakes or streams and their recapture rates in stream traps noted. When released into Lake Huron, P. marinus with intact (functional) olfactory systems were very successful in locating rivers (recapture rates ranged up to 65%), while animals with occluded nasopores were virtually unable to do so and had recapture rates five to 20 times lower than intact animals. With few exceptions, intact fish entered the stream closest to their release point within a few days, irrespective of where they had been originally captured; their ability to locate streams is apparently innate and well developed. In contrast, when released within streams, both intact and occluded P. marinus successfully swam upstream to traps for several days although the ability of the former exceeded that of the latter after this period. Migratory P. marinus rely heavily on olfactory cues, of which a larval pheromone is presumably one, to locate river mouths and to a lesser extent to promote upstream movement within rivers.
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a field test verifies that pheromones can be useful for sea lamprey Petromyzon marinus control in the great lakes
Canadian Journal of Fisheries and Aquatic Sciences, 2006Co-Authors: Michael C Wagner, Michael L Jones, Michael B Twohey, Peter W SorensenAbstract:Pheromone-baited traps have proven highly effective for managing insect pests by selectively removing reproductively active adults prior to mating. Here, we report a field test of two pheromones produced by the sea lamprey, Petromyzon marinus, which may be useful for controlling pest populations in the Laurentian Great Lakes. In the Trout River, Michigan, we demonstrated that (i) 90% of actively migrating sea lampreys could be drawn into streams treated with a migratory pheromone and (ii) lampreys were three times more likely to enter a barrier-integrated trap in a treated stream when pheromone was discharged directly through that trap (vs. an adjacent, unbaited trap). In a second experiment, we baited three traps with spermiating males (that are known to release a sex pheromone) to investigate how the quantity and spatial distribution of multiple pheromone signals would affect our ability to trap ovulating females. We found that mature females showed a strong tendency to select traps with multiple males ...
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direct behavioral evidence that unique bile acids released by larval sea lamprey Petromyzon marinus function as a migratory pheromone
Canadian Journal of Fisheries and Aquatic Sciences, 2000Co-Authors: Rickard Bjerselius, James G Seelye, John H Teeter, Peter B Johnsen, Peter J Maniak, Gerold C Grant, Christine N Polkinghorne, Peter W SorensenAbstract:Four behavioral experiments conducted in both the laboratory and the field provide evidence that adult sea lamprey (Petromyzon marinus) select spawning rivers based on the odor of larvae that they ...