Reproductive Cycle, Management and Conservation of Paxyodon Syrmatophorus (Bivalvia: Hyriidae) From the Tocantins River, Brazil

Beasley, Colin Robert; Túry, E.; Vale, W. G.; Tagliaro, Cláudia Helena

doi:10.1093/mollus/66.3.393

Cited by 25 publications

(16 citation statements)

References 8 publications

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“…The variation of the water depth refers to the fluctuation of the water level of the studied site, and this characteristic associated with the load of suspended solids seems to influence the reproductive period of freshwater bivalves (Beasley et al, 2000), mainly in tropical regions where the water temperature is constant. The hydroperiod, marked for a seasonal flood pulse in the Pantanal (Junk et al, 1989;Junk and Cunha 2005), makes it possible for the lakes to receive a higher amount of organic matter consequently increasing the amount of food available for those bivalves.…”

Section: Discussionmentioning

confidence: 99%

“…Some limiting factors such as temperature (Bauer, 2000;Strayer, 2008;Oliveira et al 2010), food availability and parasite-host interaction, influences directly in the reproductive dynamics of these mussels (Haag and Warren-Junior, 1997;Avelar and Mendonça, 1998;Beasley et al, 2000). To know which environmental factors are most important to each one of the reproduction attributes will depend on the combined effect provided by the environment in which these bivalves occur (Galbraith and Vaughn, 2009).…”

Section: Introdutionmentioning

confidence: 99%

“…The planktonic larvae, called glochidium or lasidium, complete their development cycle as temporary parasites of fish (Fryer, 1970, Mansur et al, 1987. Around 27 days after fixation, they complete metamorphosis and unfasten themselves from the fish and become a benthic organism (Bonetto and Ezcurra, 1962;Castellanos and Landoni, 1990).Some limiting factors such as temperature (Bauer, 2000;Strayer, 2008;Oliveira et al 2010), food availability and parasite-host interaction, influences directly in the reproductive dynamics of these mussels (Haag and Warren-Junior, 1997;Avelar and Mendonça, 1998;Beasley et al, 2000). To know which environmental factors are most important to each one of the reproduction attributes will depend on the combined effect provided by the environment in which these bivalves occur (Galbraith and Vaughn, 2009).…”

mentioning

confidence: 99%

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Variations on the larval incubation of Anodontites trapesialis (Unionoida, Mycetopodidae): Synergetic effect of the environmental factors and host availability

Krinski

Silva

2012

Braz. J. Biol.

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The unionid Anodontites trapesilais (Lamarck, 1819) like most freshwater mussels is a parasite of fish. So it is trivial to assume that the availability of hosts is an important factor for the maintenance of unionoid populations. What seems obvious is not always so easy to demonstrate. This study proposes to investigate the effects of abiotic and biotic variables related to the incubation of larvae in A. trapesialis. For this, we estimate different biological indexes and try to capture the dimensionality of the fish, along with the temporal variation of environmental variables. From the application of a CCA, it was demonstrated that there was a synchronicity among the factors and variables proposed here, and we infer that the flood pulse acts as a synergistic factor in this process.Keywords: reproduction, freshwater mussels, fishes, host relationship, wetlands. Variações na incubação larval de IntrodutionUnionoida mussels have a complex life cycle. After fertilization, the early stages of development occur in the inner demibranch (Bonetto and Ezcurra, 1962;1965). The planktonic larvae, called glochidium or lasidium, complete their development cycle as temporary parasites of fish (Fryer, 1970, Mansur et al., 1987. Around 27 days after fixation, they complete metamorphosis and unfasten themselves from the fish and become a benthic organism (Bonetto and Ezcurra, 1962;Castellanos and Landoni, 1990).Some limiting factors such as temperature (Bauer, 2000;Strayer, 2008;Oliveira et al. 2010), food availability and parasite-host interaction, influences directly in the reproductive dynamics of these mussels (Haag and Warren-Junior, 1997;Avelar and Mendonça, 1998;Beasley et al., 2000). To know which environmental factors are most important to each one of the reproduction attributes will depend on the combined effect provided by the environment in which these bivalves occur (Galbraith and Vaughn, 2009). Few studies have examined the environmental influences in the reproductive dynamics of the population and information is unknown related to the incubation period, elimination of larvae and parasite-host interaction for neotropical species.Anodontites trapesialis (Lamarck, 1819) (Unionoida, Mycetopodidae) is widely geographically distributed and may represent the highest percentage of benthic biomass in rivers, lakes and flood plains (Colle and Callil, 2012). Although on the national list of endangered species, (Brasil, 2004), this species can be found in abundance in farm ponds and fish farming (Guardia-Felipi and Silva-Souza, 2008) and has been considered a species for cultivation and potential source of protein (Tello-Panduro et al., 2003). However being sedentary and excellent filter feeders it has been used as a sentinel organism (Callil, 2003) for studies of environmental monitoring and an effective biomarker of pesticides (Lopes et al., 1992) and heavy metals like mercury (Callil and Junk 1999, 2000), lead and cadmium (Tomazelli et al., 2003).In order to understand the processes related to the larval developme...

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Section: Discussionmentioning

confidence: 99%

Section: Introdutionmentioning

confidence: 99%

mentioning

confidence: 99%

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Variations on the larval incubation of Anodontites trapesialis (Unionoida, Mycetopodidae): Synergetic effect of the environmental factors and host availability

Krinski

Silva

2012

Braz. J. Biol.

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“…This observation supported the outcomes of the present study, indicating a reproduction event occurring during MarchApril in the Pendjari River, a tributary of the Volta River (Figure 6). Moreover, Beasley et al (2000) depicted the spawning of the subtropical freshwater mussel Paxyodon syrmatophorus (Bivalvia: Hyriidae) in the dry season with a major peak occurring in July-August. Therefore, the recruitment period encountered in this study (July) may probably correspond to the major spawning season.…”

Section: Figure 11 Relative Yield Per Recruit (Y /R) and Biomass Per mentioning

confidence: 99%

Population dynamics of freshwater oysterEtheria elliptica(Bivalvia: Etheriidae) in the Pendjari River (Benin-Western Africa)

Akélé

Agadjihouèdé

Mensah

et al. 2015

Knowl. Managt. Aquatic Ecosyst.

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Key-words:Etheria elliptica, freshwater oyster, Bivalvia, population dynamics, Benin Etheria elliptica (Bivalvia: Etheriidae) is the only freshwater oyster occurring in Africa. The current study provides the first data on the population structure, growth, age, mortality and exploitation status of this species in the Pendjari River. E. elliptica length-frequency data were collected monthly from January to December 2009 and analyzed with FiSAT software. Population parameters including the asymptotic length (L ∞ ) and growth coefficient (K) were assessed to evaluate the stock status. The recruitment pattern was modeled with a FiSAT routine. The asymptotic length (L ∞ ) was 14.75 cm, while the growth coefficient (K) was 0.38 year −1 . The growth performance index (ø ) reached 1.92. Specimens of Etheria elliptica reached a mean size of 4.66 cm and 6.41 cm at the end of one year and 1.5 years, respectively. We estimated total mortality (Z), natural mortality (M) and fishing mortality (F) to be 2.90 year −1 , 1.16 year −1 and 1.74 year −1 , respectively. The recruitment pattern was continuous over the year with one major peak event during the rainy season (July). The exploitation rate (E = 0.60) revealed that the freshwater oyster was probably facing overexploitation due to lack of a minimum limit size and also due to an increase in the harvesting effort. Therefore, efficient management methods were urgently required to conserve the species. The return of empty shells into the water to increase the recruitment surface, rotation planning among harvesting sites and the imposition of a minimum limit size were recommendations made in order to ensure the sustainable exploitation of wild stocks. RÉSUMÉDynamique des populations de l'huître d'eau douce Etheria elliptica (Bivalvia : Etheriidae) de la rivière Pendjari (Bénin-Afrique de l'Ouest) Mots-clés :Etheria elliptica, huître d'eau douce, bivalve, Etheria elliptica (Bivalvia : Etheriidae) est la seule espèce d'huître rencontrée dans les eaux douces en Afrique. La présente étude a fourni les premières données sur la structure de la population, la croissance, l'âge, la mortalité et le niveau d'exploitation de l'huître dans la rivière Pendjari (Bénin). Les données de fré-quence de taille de l'huître E. elliptica ont été recueillies chaque mois de janvier 2009 à décembre 2009 et analysées avec le logiciel FiSAT. Les paramètres de la population, y compris la longueur asymptotique (L ∞ ), le coefficient de croissance (K) et le modèle de recrutement ont été estimés pour évaluer l'état du stock.

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“…A fauna de bivalves límnicos tem mostrado um declínio acentuado durante o último século (Watters, 1996;Cosgrove e Hastie, 2001;Villella et al, 2004;Christian et al, 2004;Bogan, 2008), o mesmo vem ocorrendo com a fauna nativa do Brasil (Beasley et al, 2000;Beasley, 2001;Almeida, 2006). O consenso é que a causa mais dramática do declínio e extinção dos bivalves dulcícolas é a modificação e destruição do seu habitat.…”

Section: Introductionunclassified

Reprodução e cultivo de bivalves límnicos ameaçados de extinção: uma estratégia para a conservação do gênero Diplodon (Spix, 1827) (Mollusca, Hyriidae)

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Reproductive Cycle, Management and Conservation of Paxyodon Syrmatophorus (Bivalvia: Hyriidae) From the Tocantins River, Brazil

Cited by 25 publications

References 8 publications

Variations on the larval incubation of Anodontites trapesialis (Unionoida, Mycetopodidae): Synergetic effect of the environmental factors and host availability

Variations on the larval incubation of Anodontites trapesialis (Unionoida, Mycetopodidae): Synergetic effect of the environmental factors and host availability

Population dynamics of freshwater oysterEtheria elliptica(Bivalvia: Etheriidae) in the Pendjari River (Benin-Western Africa)

Reprodução e cultivo de bivalves límnicos ameaçados de extinção: uma estratégia para a conservação do gênero Diplodon (Spix, 1827) (Mollusca, Hyriidae)

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