The Ecology of Larval and Metamorphosing Lampreys

Dawson, Heather A.; Quintella, Bernardo R.; Almeida, Pedro R.; Treble, Andrew J.; Jolley, Jeffrey C.

doi:10.1007/978-94-017-9306-3_3

Cited by 117 publications

(177 citation statements)

References 201 publications

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“…Ammocoetes were collected from fine-grained substrates (Dawson et al, 2015) in a pool formed behind a downed tree at the Clear Fork River and along the margins of the Pigeon River. Areas were sampled because they appeared suitable for ammocoetes and were within ~50 m of all other collected sample types.…”

Section: Field Samplingmentioning

confidence: 99%

Radioisotope and stable isotope ratios (Δ¹⁴C, δ¹⁵N) suggest larval lamprey growth is dependent on both fresh and aged organic matter in streams

Evans

Bellamy

Bauer

2018

Ecology of Freshwater Fish

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Lampreys have a complex life cycle which includes a multi‐year infaunal larval stage (ammocoete). Gut content analysis has generally identified detritus (i.e., unidentifiable organic matter) as the major dietary component to ammocoetes, though algae can also be important. However, gut content preserves only a snapshot of the animal's diet and does not reflect assimilated material. In order to better characterise the nutritional sources supporting ammocoete growth, we analysed ammocoete body tissue and potential dietary sources at two streams using natural Δ14C and δ15N to estimate time‐integrated nutritional support. Bayesian isotope mixing models revealed differences in the importance of sources supporting ammocoetes between sites. Ammocoetes from a stream in a mixed land usage area (~50% agriculture, ~40% forest and ~10% developed) were primarily supported (mean: ~50%) by fresh terrestrial organic matter but were also supported by substantial contributions (mean: ~30%) by aged organic matter (AOM) and autochthonous material (algae; mean ~20%). In a predominantly forested (~90%) headwater stream, different modelling scenarios (uninformed or informed priors) suggested that algal support of ammocoete nutrition ranged from 7% to 45%. However, the model relying on informed priors developed from gut content analysis produced the low estimates, suggesting these were more reliable. When algae were a minor component of the nutrition at the forested site, ammocoetes were highly dependent on AOM (83 ± 26%; mean ± SD). Based on these findings, ammocoete growth and development are predicted to be strongly influenced by both land use and the availability of allochthonous and autochthonous materials of varying ages within streams.

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Section: Field Samplingmentioning

confidence: 99%

Radioisotope and stable isotope ratios (Δ¹⁴C, δ¹⁵N) suggest larval lamprey growth is dependent on both fresh and aged organic matter in streams

Evans

Bellamy

Bauer

2018

Ecology of Freshwater Fish

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“…The larval-released migratory cue appears to consist of unspecialized metabolites that are conserved among lamprey species Fine et al, 2004;Robinson et al, 2009;Yun et al, 2011;Buchinger et al, 2013). Similar habitat preferences for rearing and spawning conceivably preclude strong selective pressure for a species-specific migratory cue (Dawson et al, 2015;Johnson et al, 2015). Frequent observations of heterospecific spawning indicate that unknown components of the male mating pheromone blend may be partially shared among species (Cochran et al, 2008;Johnson et al, 2015), but the species specificity of the mating pheromone remains unknown.…”

Section: Introductionmentioning

confidence: 99%

Evidence for partial overlap of male olfactory cues in lampreys

Buchinger

Huertas

et al. 2016

Journal of Experimental Biology

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Animals rely on a mosaic of complex information to find and evaluate mates. Pheromones, often consisting of multiple components, are considered to be particularly important for species-recognition in many species. Although the evolution of species-specific pheromone blends is well described in many insects, very few vertebrate pheromones have been studied in a macro-evolutionary context. Here, we report a phylogenetic comparison of multi-component male odours that guide reproduction in lampreys. Chemical profiling of sexually mature males from eleven species of lamprey, representing six of ten genera and two of three families, indicated that the chemical profiles of sexually mature male odours are partially shared among species. Behavioural assays conducted with four species sympatric in the Laurentian Great Lakes indicated asymmetric female responses to heterospecific odours, where Petromyzon marinus were attracted to male odour collected from all species tested, but other species generally preferred only the odour of conspecifics. Electro-olfactogram recordings from P. marinus indicated that although P. marinus exhibited behavioural responses to odours from males of all species, at least some of the compounds that elicited olfactory responses were different in conspecific male odours compared with heterospecific male odours. We conclude that some of the compounds released by sexually mature males are shared among species and elicit olfactory and behavioural responses in P. marinus, and suggest that our results provide evidence for partial overlap of male olfactory cues among lampreys. Further characterization of the chemical identities of odour components is needed to confirm shared pheromones among species.

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“…In their natural environment, lampreys are likely to encounter taurocholic acid that has been excreted in teleost bile. As teleosts predate on larval and metamorphic sea lampreys (Dawson et al, 2015), taurocholic acid may signal escape behaviour during these stages. As parasitic adult sea lampreys predate on teleosts (Smith and Tibbles, 1980), taurocholic acid may stimulate behaviour associated with predation during this life stage.…”

Section: Discussionmentioning

confidence: 99%

Odorant organization in the olfactory bulb of the sea lamprey

Green

Boyes

McFadden

et al. 2017

Journal of Experimental Biology

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Olfactory sensory neurons innervate the olfactory bulb, where responses to different odorants generate a chemotopic map of increased neural activity within different bulbar regions. In this study, insight into the basal pattern of neural organization of the vertebrate olfactory bulb was gained by investigating the lamprey. Retrograde labelling established that lateral and dorsal bulbar territories receive the axons of sensory neurons broadly distributed in the main olfactory epithelium and that the medial region receives sensory neuron input only from neurons projecting from the accessory olfactory organ. The response duration for local field potential recordings was similar in the lateral and dorsal regions, and both were longer than medial responses. All three regions responded to amino acid odorants. The dorsal and medial regions, but not the lateral region, responded to steroids. These findings show evidence for olfactory streams in the sea lamprey olfactory bulb: the lateral region responds to amino acids from sensory input in the main olfactory epithelium, the dorsal region responds to steroids (taurocholic acid and pheromones) and to amino acids from sensory input in the main olfactory epithelium, and the medial bulbar region responds to amino acids and steroids stimulating the accessory olfactory organ. These findings indicate that olfactory subsystems are present at the base of vertebrate evolution and that regionality in the lamprey olfactory bulb has some aspects previously seen in other vertebrate species.

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The Ecology of Larval and Metamorphosing Lampreys

Cited by 117 publications

References 201 publications

Radioisotope and stable isotope ratios (Δ¹⁴C, δ¹⁵N) suggest larval lamprey growth is dependent on both fresh and aged organic matter in streams

Radioisotope and stable isotope ratios (Δ¹⁴C, δ¹⁵N) suggest larval lamprey growth is dependent on both fresh and aged organic matter in streams

Evidence for partial overlap of male olfactory cues in lampreys

Odorant organization in the olfactory bulb of the sea lamprey

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The Ecology of Larval and Metamorphosing Lampreys

Cited by 117 publications

References 201 publications

Radioisotope and stable isotope ratios (Δ14C, δ15N) suggest larval lamprey growth is dependent on both fresh and aged organic matter in streams

Radioisotope and stable isotope ratios (Δ14C, δ15N) suggest larval lamprey growth is dependent on both fresh and aged organic matter in streams

Evidence for partial overlap of male olfactory cues in lampreys

Odorant organization in the olfactory bulb of the sea lamprey

Contact Info

Product

Resources

About

Radioisotope and stable isotope ratios (Δ¹⁴C, δ¹⁵N) suggest larval lamprey growth is dependent on both fresh and aged organic matter in streams

Radioisotope and stable isotope ratios (Δ¹⁴C, δ¹⁵N) suggest larval lamprey growth is dependent on both fresh and aged organic matter in streams