Growth models and shell morphometrics of two populations of Melanoides tuberculata (Thiaridae) living in hot springs and freshwater pools

Elkarmi, Ali Z.; Ismail, Naim S.

doi:10.4081/jlimnol.2007.90

Cited by 30 publications

(23 citation statements)

References 14 publications

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“…Environments with greater organic enrichment provide a larger biomass of exotic species, as observed by other authors (Callisto et al 2005, Velho et al 2005, Elkarmi & Ismail 2007, Peso et al 2011, Molozzi et al 2013, which is often determined by anthropic actions (Borja et al 2009, Tafangenyasha & Dube 2008. This is associated with an increase in productivity in those ecosystems, which makes the rise in metabolic rates and lifespan possible, allowing the dominance of some opportunist species.…”

Section: Discussionmentioning

confidence: 79%

Effectiveness of abundance and biomass curves in detecting environmental alterations in semi-arid region reservoirs

et al. 2018

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For mitigation of environmental problems generated by bad water resource management, the first step is to develop methods for effective diagnosis. The potential bioindicator, mainly in the benthic community, in the evaluation of water quality is the structure of the community, associated with magnitude of environmental impact. The aim of the present study was to evaluate the effectiveness of abundance biomass curves (ABC) as tools to estimate ecological quality in reservoirs in the Brazilian semi-arid region. Two reservoirs, Epitácio Pessoa and Argemiro de Figueiredo were selected. These reservoirs are located in the watershed of the Paraíba River, in Northeast Brazil. Sampling was done at 40 sites in the littoral region of each reservoir, during the periods of higher and lower water volume in the reservoirs. ABC for semi-arid region reservoirs showed disparate results for biological and environmental indicators, because they had a better relationship with momentary variables (physical and chemical parameters). This may be related to the high occurrence of exotic species, principally Corbicula largillierti, which has a high biomass, in association with a severe drought period. ABC must thus be used with parsimony and combined with other indicators, for an accurate and coherent characterization.

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Section: Discussionmentioning

confidence: 79%

Effectiveness of abundance and biomass curves in detecting environmental alterations in semi-arid region reservoirs

et al. 2018

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“…Theoretical explanations for the risk associated with the invasion of the freshwater species identified growth and fecundity as major factors for colonisation, establishment and range expansion in the newer geographical regions. Empirical studies on the invasion biol-ogy of the freshwater snails Melanoides tuberculata (Elkarmi, Ismail, 2007); Bellamya chinensis (Stephen et al, 2013), Physa acuta (de Kock, Wolmarans, 2007;Semenchenko et al, 2008;Guo et al, 2009;Ng et al, 2015), Pomacea canaliculata (de Brito, Joshi, 2016) and P. insularum (Conner et al, 2008) suggest that growth and reproduction are crucial indicators for colonisation and establishment in the invaded habitats. As a consequence, evaluation of the growth and reproductive features of the invasive species has been carried out to predict the prospective habitat expansion in the concerned regions.…”

Section: Discussionmentioning

confidence: 99%

“…Evaluation of the fecundity and population of invasive aquatic molluscs facilitates assessment of the risks associated with invasion (Keller et al, 2007). The studies on the demography of the invasive snails such as Melanoides tuberculata (Elkarmi, Ismail, 2007) and Bellamya chinensis (Stephen et al, 2013) substantiate this proposition. Information on the population biology of the invasive snails has been helpful for predicting the possibilities of range expansion as well as the effects on the native biota (Gotoh, Kawata, 2000).…”

Section: Introductionmentioning

confidence: 86%

Life table estimates of the invasive snail Physa acuta Draparnaud, 1805, occurring in India

Saha

Parveen

Chakraborty

et al. 2017

Ekológia (Bratislava)

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The life table characteristics of the invasive snail Physa acuta were assessed in the laboratory using the individuals occurring in a newly colonised area in Burdwan, West Bengal, India. Using the changes in the shell length and the body weight of the snails as surrogate, the population growth of the snails was estimated along with longevity and the fecundity schedule. The cohort of P. acuta lived for a maximum of 22 weeks with a life expectancy (ex) of 7.27 weeks and the age-specific survivorship being 0.825. Increment of the shell length of the snails complied with the von Bertalanffy growth equation, lt = 11.75(1 − exp−0.17(t−0.06)), and the observed and the expected data of the length at time t (lt) did not vary significantly (z score = 0.230; P = 0.818; n=20 pairs). Following attainment of sexual maturity between 28 and 42 days, oviposition continued till 20 weeks time, with 0.1-10 eggs laid by each individual. The eggs present per capsule remained between 01 and 11, whilst the net reproductive rate (R0), intrinsic rate of increase (rm) and the finite rate of increase (λ) were 116.07, 0.1 and 1.11, respectively. The observations are similar to those made earlier on the same species but from African and South American continents. The results of the present observation are pioneer in providing the initial studies about the life history of the invasive snail P. acuta in Indian context. Using the present information as a basis, further studies including long-term population monitoring should be initiated to understand the effects of the invasive snail P. acuta in the freshwater ecosystem of West Bengal, India.

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“…In practice, the interpretation of the exponencial model shows that M. tuberculatus has rapid growth, is well adapted to the eutrophic environment, and probably exerts competitive pressure on other species of molluscs, meeting the requirements of an invasive species (ELKARMI & ISMAIL 2007, EVERETT 2000, POINTIER et al 1993. Previous studies have used these relationships to propose equations for the estimation of the growth rate and/or secondary production of benthic aquatic insects (GENKAI- KATO & MIYASAKA 2007, GONZÁLEZ et al 2002, CRESSA 1999.…”

Section: Discussionmentioning

confidence: 99%

“…The biomass was obtained from the difference between the total dry weight and the weight of the mineral fraction. The results were expressed in milligrams and correlated with the length and shell aperture measurements in millimeters, in order to establish the relationship between weight and length (ELKARMI & ISMAIL 2007).…”

Section: Methodsmentioning

confidence: 99%

Size-mass relationships of Melanoides tuberculatus (Thiaridae: Gastropoda) in a eutrophic reservoir

Neto¹,

Molozzi²,

Callisto³

2010

Zoologia (Curitiba, Impr.)

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ABSTRACT. This study evaluated the relationships of certain allometric measurements in Melanoides tuberculatus Muller, 1774, in order to develop a statistical model to estimate the biomass of this mollusc species. We measured the total length and aperture of 70 shells. These measurements were correlated with the biomass values to construct exponential and power-function models, and both models showed high coefficients of determination. The exponential model was the better biomass predictor, with a coefficient of determination over 93%. These proposed models may be an effective tool to determine the biomass of M. tuberculatus in eutrophic Brazilian reservoirs.

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Growth models and shell morphometrics of two populations of Melanoides tuberculata (Thiaridae) living in hot springs and freshwater pools

Abstract: Two morphologically different populations of snail, Melanoides tuberculata (Muller, 1774)

Cited by 30 publications

References 14 publications

Effectiveness of abundance and biomass curves in detecting environmental alterations in semi-arid region reservoirs

Effectiveness of abundance and biomass curves in detecting environmental alterations in semi-arid region reservoirs

Life table estimates of the invasive snail Physa acuta Draparnaud, 1805, occurring in India

Size-mass relationships of Melanoides tuberculatus (Thiaridae: Gastropoda) in a eutrophic reservoir

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