Influence of hook barbs on the “through-the-gill” hook removal method for deeply hooked Smallmouth Bass

Cooke, Steven J.; LaRochelle, Luc; Danylchuk, Andy J.; Danylchuk, Sascha Clark; Griffin, Lucas P.

doi:10.1016/j.fishres.2022.106322

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…It does, however, match the coloration and size/shape, of the common North American leech, Macrobdella decora , which is widespread and abundant in eastern North America watersheds and typically feeds on aquatic vertebrates ( Klemm, 1982 ; Munro et al, 1992 ). M. dolomieu , L. fasciola ’s primary host fish, is a generalist predator with a diet of aquatic invertebrates, including leeches, in addition to small fishes ( Clady, 1974 ), and recreational fishers frequently use live and/or artifical leeches as bait to catch this species ( Cooke et al, 2022 ). Based on the available data, it seems that Macrobdella decora may be the best model species candidate for the “worm-like” ( McNichols, 2007 ) L. fasciola mantle lure phenotype, and will hereafter be referred to as the leech phenotype.…”

Section: Resultsmentioning

confidence: 99%

Polymorphism in the aggressive mimicry lure of the parasitic freshwater mussel Lampsilis fasciola

Hewitt,

Johnson,

Buntin

et al. 2024

PeerJ

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Unionoid freshwater mussels (Bivalvia: Unionidae) are free-living apart from a brief, obligately parasitic, larval stage that infects fish hosts, and gravid female mussels have evolved a spectrum of strategies to infect fish hosts with their larvae. In many North American species, this involves displaying a mantle lure: a pigmented fleshy extension that acts as an aggressive mimic of a host fish prey, thereby eliciting a feeding response that results in host infection. The mantle lure of Lampsilis fasciola is of particular interest because it is apparently polymorphic, with two distinct primary lure phenotypes. One, described as “darter-like”, has “eyespots”, a mottled body coloration, prominent marginal extensions, and a distinct “tail”. The other, described as “worm-like”, lacks those features and has an orange and black coloration. We investigated this phenomenon using genomics, captive rearing, biogeographic, and behavioral analyses. Within-brood lure variation and within-population phylogenomic (ddRAD-seq) analyses of individuals bearing different lures confirmed that this phenomenon is a true polymorphism. The relative abundance of the two morphs appears stable over ecological timeframes: the ratio of the two lure phenotypes in a River Raisin (MI) population in 2017 was consistent with that of museum samples collected at the same site six decades earlier. Within the River Raisin, four main “darter-like” lure motifs visually approximated four co-occurring darter species (Etheostoma blennioides, E. exile, E. microperca, and Percina maculata), and the “worm-like” lure resembled a widespread common leech, Macrobdella decora. Darters and leeches are typical prey of Micropterus dolomieui (smallmouth bass), the primary fish host of L. fasciola. In situ field recordings of the L. fasciola “darter” and “leech” lure display behaviors, and the lure display of co-occurring congener L. cardium, were captured. Despite having putative models in distinct phyla, both L. fasciola lure morphs have largely similar display behaviors that differ significantly from that of sympatric L. cardium individuals. Some minor differences in the behavior between the two L. fasciola morphs were observed, but we found no clear evidence for a behavioral component of the polymorphism given the criteria measured. Discovery of discrete within-brood inheritance of the lure polymorphism implies potential control by a single genetic locus and identifies L. fasciola as a promising study system to identify regulatory genes controlling a key adaptive trait of freshwater mussels.

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Section: Resultsmentioning

confidence: 99%

Polymorphism in the aggressive mimicry lure of the parasitic freshwater mussel Lampsilis fasciola

Hewitt,

Johnson,

Buntin

et al. 2024

PeerJ

View full text Add to dashboard Cite

show abstract

Preparing recreational fisheries for the uncertain future: An update of progress towards answering the 100 most pressing research questions

et al. 2023

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Aggressive mimicry lure polymorphisms in the parasitic musselLampsilis fasciolamodel fish or leech host prey and differ in morphology and pigmentation, but not in display behavior

Hewitt,

Johnson,

Buntin

et al. 2023

Preprint

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Unionoid freshwater mussels (Bivalvia: Unionidae) are free-living apart from a brief, obligately parasitic, larval stage that infects fish hosts and gravid female mussels have evolved a spectrum of strategies to infect fish hosts with their larvae. In many North American species, this involves displaying a mantle lure: a pigmented fleshy extension that acts as an aggressive mimic of a host fish prey, thereby eliciting a feeding response that results in host infection. The mantle lure ofLampsilis fasciolais of particular interest because it is apparently polymorphic, with two distinct primary lure phenotypes. One, described as “darter-like”, has “eyespots”, a mottled body coloration, prominent marginal extensions, and a distinct “tail”. The other, described as “worm-like”, lacks those features and has an orange and black coloration. We investigated this phenomenon to 1) confirm that it is a true polymorphism; 2) investigate its ecological persistence; 3) identify the range of putative model species targeted by this mimicry system within a river drainage; 4) determine whether the mantle lure polymorphism includes a behavioral component. Detection of within-brood lure variation and within-population phylogenomic (ddRAD-seq) analyses of individuals bearing different lures confirmed that this phenomenon is a true polymorphism. It appears stable over ecological timeframes: the ratio of the two lure phenotypes in a River Raisin (MI) population in 2017 was consistent with that of museum samples collected at the same site 6 decades earlier. Within the River Raisin, four main “darter-like” lure motifs visually approximated four co-occurring darter species (Etheostoma blennioides, E. exile, E. microperca,andPercina maculata) and the “worm-like” lure resembled a widespread common leech,Macrobdella decora. Darters and leeches are typical prey ofMicropterus dolomieui(smallmouth bass), the primary fish host ofL. fasciola.In situfield recordings were made of theL. fasciola“darter” and “leech” lure display behaviors, in addition to the non-polymorphic lure display of co-occurringL. cardium. Despite having putative models in distinct phyla, bothL. fasciolalure morphs have similar display behaviors that differ significantly from that of sympatricL. cardiumindividuals. We conclude that theL. fasciolamantle lure polymorphism does not include a behavioral component. Discovery of discrete within-brood inheritance of the lure polymorphism implies potential control by a single genetic locus and identifiesL. fasciolaas a promising study system to identify regulatory genes controlling a key adaptive trait of freshwater mussels.

show abstract

Influence of hook barbs on the “through-the-gill” hook removal method for deeply hooked Smallmouth Bass

Cited by 3 publications

References 24 publications

Polymorphism in the aggressive mimicry lure of the parasitic freshwater mussel Lampsilis fasciola

Polymorphism in the aggressive mimicry lure of the parasitic freshwater mussel Lampsilis fasciola

Preparing recreational fisheries for the uncertain future: An update of progress towards answering the 100 most pressing research questions

Aggressive mimicry lure polymorphisms in the parasitic musselLampsilis fasciolamodel fish or leech host prey and differ in morphology and pigmentation, but not in display behavior

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