Reproductive Cycle of Quadrula metanevra (Bivalvia: Unionidae) in the Pickwick Dam Tailwater of the Tennessee River

Garner, Jeffrey T.; Haggerty, Thomas M.; Modlin, Richard F.

doi:10.1674/0003-0031(1999)141[0277:rcoqmb]2.0.co;2

Cited by 41 publications

(48 citation statements)

References 15 publications

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“…tachytictic or short-term brooders), while others retain their glochidia for a longer period (bradytictic or long-term brooders). Recent quantitative assessments of unionid reproductive biology suggest that lengths of the gametogenic, spawning, and brooding periods may be related to seasonal timing of these reproductive activities (Haggerty et al, 1995;Garner et al, 1999;Haggerty & Garner, 2000). For example, bradytictic species tend to have relatively short (usually a few weeks) gamete production and spawning periods in late summer and early autumn.…”

Section: Introductionmentioning

confidence: 99%

Reproductive phenology in Megalonaias nervosa (Bivalvia: Unionidae) in Wheeler Reservoir, Tennessee River, Alabama, USA

2005

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Two hundred and sixty-nine specimens of Megalonaias nervosa (Rafinesque, 1820) were collected approximately monthly from the Wheeler Reservoir (Tennessee River mile 298), Alabama, USA, between July 1995 and June 1997. Microscopic and gross examinations of gonadal tissue and marsupia were used to determine the phenology of gamete production, spawning, brooding, and glochidia discharge. In addition, 11 females were collected in October 2001 to obtain estimates of brood size. Little reproductive activity was observed through most of the year, culminating in a bout of activity in late summer and early autumn. In males, spermatozoa were seen only in individuals collected in August and September. In females, oocytes developed and grew quickly during the same period and all oocytes were released to the marsupia over a relatively short period, showing a high degree of spawning synchronicity with males. Glochidia quickly matured and were present in both inner and outer demibranchs until December. The average number of glochidia per female was 740,379 ± 72,854 (95% CI). The reproductive cycle observed differed from those reported for other members of the Ambleminae and was more similar to members of Lampsilinae. This suggests that the lengths of the gametogenic and spawning periods may be related to the timing of fertilization, rather than to the length of the brooding period or to the species phylogeny.

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Section: Introductionmentioning

confidence: 99%

Reproductive phenology in Megalonaias nervosa (Bivalvia: Unionidae) in Wheeler Reservoir, Tennessee River, Alabama, USA

2005

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“…Hermaphrodites generally constitute a small proportion (usually less than 10%) of freshwater mussel populations (Haggerty et al, 1995;Garner et al, 1999;Haag and Staton, 2003). However, we found 17% of Q. cylindrica and 50% of Q. quadrula were hermaphroditic at site 3.…”

Section: Discussionmentioning

confidence: 54%

Effects of reservoir management on abundance, condition, parasitism and reproductive traits of downstream mussels

Galbraith

Vaughn

2011

River Research & Apps

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The large-scale impoundment of rivers has led to global declines in freshwater mussel populations. It is important to understand the mechanisms underlying these declines to initiate an effective recovery strategy. We examined population traits of three Quadrula species (Quadrula pustulosa, Q. cylindrica and Q. quadrula) at three locations that were exposed to two different reservoir management regimes: releases that mimicked natural flow patterns and releases that were higher and colder in summer months than the natural system. We found lower mussel density, higher hermaphroditism and parasitism rates, and reduced body condition downstream of the dam with unnatural flow regimes. Sex ratios varied on a species and site basis. We found more Quadrula cylindrica females than males averaged across all three sampling sites while Q. pustulosa was male biased across all sites and at site 1. We observed approximately equal sex ratios in Quadrula quadrula. Population disturbances downstream of the more naturally-regulated dam were not as severe. Our data indicate that dam operation can have effects on a variety of mussel life history characteristics that may ultimately reduce population viability.

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“…The basic anatomy of unioniform bivalves was studied during the late 19 th and early 20 th centuries, but it is largely ignored today (but see Kraemer 1967, 1984, Smith 1980, 1983, 1986, Haggerty et al 1995, 2005, Garner et al 1999, Haggerty and Garner 2000, Henley et al 2007. A comprehensive overview of the basic anatomy, physiology, and biology of freshwater mussels is provided by McMahon and Bogan (2001).…”

Section: Anatomical and Morphological Researchmentioning

confidence: 99%

Freshwater bivalve (Unioniformes) diversity, systematics, and evolution: status and future directions

Bogan

Roe

2008

Journal of the North American Benthological Society

106

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Freshwater bivalves of the order Unioniformes represent the largest bivalve radiation in freshwater. The unioniform radiation is unique in the class Bivalvia because it has an obligate parasitic larval stage on the gills or fins of fish; it is divided into 6 families, 181 genera, and ∼800 species. These families are distributed across 6 of the 7 continents and represent the most endangered group of freshwater animals alive today. North American unioniform bivalves have been the subject of study and illustration since Martin Lister, 1686, and over the past 320 y, significant gains have been made in our understanding of the evolutionary history and systematics of these animals. Here, the current state of unioniform systematics and evolution is summarized, and suggestions for future research themes are proposed. Advancement in the areas of systematics and evolutionary relationships within the Unioniformes will require a resurgence of survey work and reevaluation of all taxa, especially outside of North America and Western Europe. This work will require collection of animals for shell morphology, comparative anatomy, and molecular analyses. Along with reexamination of described taxa, a renewed emphasis on the natural history, host-fish relationships, ecology, and physiology of these animals is needed. Traditional conchological and anatomical characters should be reevaluated, new character suites should be added, and new morphometric methods should be applied. The fossil record of freshwater bivalves should be carefully reviewed, and phylogenetic hypotheses including fossil taxa must be developed. We will have to expand our set of molecular tools to include or develop additional markers, such as single-copy nuclear genes and microsatellites. Examination of double uniparental inheritance of mitochondrial deoxyribonucleic acid (DNA) is providing new insights into the evolution of this order. Mitochondrial gene order differs among genera but is still to be explored. Expansion of our understanding of the evolutionary relationships and history of unioniform bivalves will provide a solid foundation to study the zoogeography of these rather sessile, obligate freshwater organisms. The unique natural history of unioniform bivalves provides a fertile area for testing and developing evolutionary theories, and, as our understanding of the systematics of these animals improves, a better understanding of the evolution of this expansive radiation in freshwater will develop. Keywords Unioniformes, mussels, bivalves, macroinvertebrates, benthic, clams Abstract. Freshwater bivalves of the order Unioniformes represent the largest bivalve radiation in freshwater. The unioniform radiation is unique in the class Bivalvia because it has an obligate parasitic larval stage on the gills or fins of fish; it is divided into 6 families, 181 genera, and ;800 species. These families are distributed across 6 of the 7 continents and represent the most endangered group of freshwater animals alive today. North American unioniform bivalves hav...

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Reproductive Cycle of Quadrula metanevra (Bivalvia: Unionidae) in the Pickwick Dam Tailwater of the Tennessee River

Cited by 41 publications

References 15 publications

Reproductive phenology in Megalonaias nervosa (Bivalvia: Unionidae) in Wheeler Reservoir, Tennessee River, Alabama, USA

Reproductive phenology in Megalonaias nervosa (Bivalvia: Unionidae) in Wheeler Reservoir, Tennessee River, Alabama, USA

Effects of reservoir management on abundance, condition, parasitism and reproductive traits of downstream mussels

Freshwater bivalve (Unioniformes) diversity, systematics, and evolution: status and future directions

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