Influence of the flood pulse on reproduction and growth of Anodontites trapesialis (Lamarck, 1819) (Bivalvia: Mycetopodidae) in the Pantanal wetland, Brazil

Determining how, when, and why energy allocation occurs based on different life history traits, provides core knowledge for understanding evolution, ecology, and conservation of populations. We assumed that, in seasonal environments, Anodontites trapesialis , a common freshwater mussel in the Pantan...

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Bibliographic Details
Published in:Hydrobiologia 2018-03, Vol.810 (1), p.433-448
Main Authors: Callil, Cláudia T., Leite, Marilene C. S., Mateus, Lúcia A. F., Jones, Jess W.
Format: Article
Language:English
Subjects:
Analysis
Biomedical and Life Sciences
Breeding
Ecology
Evolution (Biology)
Evolutionary conservation
Flood predictions
Floods
Freshwater
Freshwater & Marine Ecology
Freshwater Bivalves
Freshwater molluscs
Gametes
Growth
Growth patterns
Hermaphroditism
Incubation
Incubation period
Inland water environment
Larvae
Life history
Life Sciences
Maturation
Mollusks
Reproductive cycle
River channels
Rivers
Seasonal variations
Seasonality
Spawning
Wetlands
Zoology
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Summary:Determining how, when, and why energy allocation occurs based on different life history traits, provides core knowledge for understanding evolution, ecology, and conservation of populations. We assumed that, in seasonal environments, Anodontites trapesialis , a common freshwater mussel in the Pantanal wetland, has to time its maturation, its larvae incubation time, and adjusts its breeding strategy seasonally. From histological analyses of gametes, larval count, and marginal increment of the shell rings, we present information about phenology and growth strategies to investigate the influence of environment and reproductive period on growth. We determined for the first time, asymptotic maximum size and longevity for this mussel. This species is a functional hermaphrodite, with maturation and spawning starting at the end of the flood period, when the water begins to recede and fishes return to the main river channel. The larvae, lasidium in this case, disperse on host fishes at this time. As we predicted, the flood pulse is the main regulatory factor to the growth patterns and reproductive period establishment. The species’ life history traits are discussed in the context of life history theory as adaptive responses to the dynamic balance imposed by the seasonality of the Pantanal.
ISSN:0018-8158
1573-5117
DOI:10.1007/s10750-017-3097-3