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Mascarenhas CS, Silva RZ, Müller G. Helminth’s assemblage of Trachemys dorbigni (Testudines: Emydidae) in southern Brazil: implications of anthropogenic environments and host’s genders. IHERINGIA. SERIE ZOOLOGIA 2021. [DOI: 10.1590/1678-4766e2021011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
ABSTRACT The assemblage of helminths of Trachemys dorbigni was analyzed according two environments (rural and urban) and according to host’s gender. Thus, the helminths found were: Spiroxys contortus (Rudolphi, 1819), Falcaustra affinis (Leidy, 1856), Camallanus emydidius Mascarenhas & Müller, 2017, Dioctophyme renale (Goeze, 1782) (larvae), Eustrongylides sp. (larvae) (Nematoda), Telorchis corti (Stunkard, 1915), Telorchis achavali Mañé-Garzón & Holcman-Spector, 1973, Telorchis spp. (Digenea), Polystomoides rohdei Mañé-Garzón & Holcman-Spector,1968 and Neopolystoma sp. (Monogenoidea). Parasitological indices suggests that S. contortus, F. affinis, C. emydidius, T. corti and P. rohdei are species common in helminth assemblage of T. dorbigni in southern Brazil. Infection by Dioctophyme renale is typical of the urban area and suggest relation with eutrophication process and feedback of parasitic cycle in the freshwater urban environment. Parasitological indices of Neopolystoma sp. and T. achavali suggest to be occasional infections; whereas infection by Eustrongylides sp. could be considered accidental. About Telorchiidae, there was no co-occurrence of the species of this group for the examined hosts. In relation to host’s gender, it was observed that infections by S. contortus, F. affinis, C. emydidius and T. corti had higher rates in females, showing a more intimate association with the females of T. dorbigni. The results suggest that human impact on the environment could affect the infrapopulacional dynamics of parasite species influencing the presence and rates of infection of helminths or exacerbating heterogeneities related to host’s gender.
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Quintela FM, Lima GP, Silveira ML, Costa PG, Bianchini A, Loebmann D, Martins SE. High arsenic and low lead concentrations in fish and reptiles from Taim wetlands, a Ramsar site in southern Brazil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 660:1004-1014. [PMID: 30743898 DOI: 10.1016/j.scitotenv.2019.01.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 01/04/2019] [Accepted: 01/04/2019] [Indexed: 06/09/2023]
Abstract
The pollution caused by heavy metals and metalloids represent an emerging threat to wetlands worldwide. Herein we examined the concentrations of arsenic (As) and lead (Pb) in fish and aquatic/semi-aquatic reptiles from Taim wetlands, a Ramsar site located at the southernmost Brazilian coastal plain. A total of 82 individuals from six fish and three reptile species from varied trophic levels were analysed through furnace graphite atomic absorption spectrophotometry. Mean As concentrations (μg·g-1 dry weight) were markedly high, ranging from 13.06 ± 3.18 to 19.4 ± 4.04 in fish and 3.51 ± 2.36 to 19.00 ± 10.45 in reptiles. Mean Pb concentrations were low, ranging from 0.00067 ± 0.00060 to 0.0040 ± 0.00045 in fishes and 0.00103 ± 0.0011 to 0.0271 ± 0.0353 in reptiles. The highest As mean level was detected in the herbivore-insectivore fish Astyanax aff. fasciatus, a species of low trophic level among the analysed taxa. The highest Pb mean level was found in the broad-snouted caiman Caiman latirostris, the highest trophic level species analysed. The present study warns for the contamination of As especially in edible fish, which constitute a threat to the communities that use this resource in systems connected to Taim wetlands. As concentrations in reptiles were also higher than those reported in previous studies concerning the groups herein addressed. It is possible that the high As burdens found in the analysed species could be attributed to the use of fertilizers and pesticides in extensive irrigated rice areas located in Taim wetlands surroundings, but natural sources cannot be dismissed.
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Affiliation(s)
- Fernando M Quintela
- Laboratório de Vertebrados, Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, 96203-900 Rio Grande, RS, Brazil
| | - Gilmar Pinto Lima
- Laboratório de Toxicologia, Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, 96203-900 Rio Grande, RS, Brazil
| | - Melise L Silveira
- Laboratório de Vertebrados, Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, 96203-900 Rio Grande, RS, Brazil; Programa de Pós-Graduação em Biologia de Ambientes Aquáticos Continentais, Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, 96203-900 Rio Grande, RS, Brazil
| | - Patrícia Gomes Costa
- Laboratório de Toxicologia, Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, 96203-900 Rio Grande, RS, Brazil
| | - Adalto Bianchini
- Laboratório de Toxicologia, Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, 96203-900 Rio Grande, RS, Brazil
| | - Daniel Loebmann
- Laboratório de Vertebrados, Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, 96203-900 Rio Grande, RS, Brazil
| | - Samantha E Martins
- Laboratório de Toxicologia, Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, 96203-900 Rio Grande, RS, Brazil.
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Lucas PS, Bager A. Contrasting reproductive strategies in a narrow latitude range: the case of D’Orbigny’s slider. AMPHIBIA-REPTILIA 2017. [DOI: 10.1163/15685381-00003122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Reproductive traits and the level of parental investment in offspring varies between individuals and species. These are central issues in life history theory and evolutionary biology. Maternal body size plays an important role in reproduction, and we usually observe variable investment in offspring by females. Thus, optimal egg size may not be reached in some populations or species. In this study, we tested if reproductive traits differed between populations of D’Orbigny’s slider in a specific geographical area in Brazil. We evaluated the relationship between reproductive traits to maternal body size and clutch size to egg size to determine possible trade-offs across populations. At the population level, maternal body size and reproductive traits of D’Orbigny’s slider were different even in geographically nearby areas. Maternal body size had a positive effect on clutch size, but not on egg size, except in the Arroio Grande population. Nevertheless, we did not observe a negative correlation between clutch and egg size in any population. Although maternal body size had effects in the different populations explaining most of the variation of clutch size, variation in egg size may be the result of decreased survival chances in unpredictable environments and possibly morphological constraints. The trade-off between egg size and number was not observed and this could be expected if resource availability and reproductive allocation by females vary greatly among individuals.
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Affiliation(s)
- Priscila Silva Lucas
- Programa de Pós-Graduação em Ecologia Aplicada, Departamento de Biologia, Universidade Federal de Lavras, Campus Universitário, CP 3037, CEP 37200-000, Lavras, MG, Brazil
- Centro Brasileiro de Estudos em Ecologia de Estradas, Universidade Federal de Lavras, Campus Universitário, CP 3037, CEP 37200-000, Lavras, MG, Brazil
| | - Alex Bager
- Programa de Pós-Graduação em Ecologia Aplicada, Departamento de Biologia, Universidade Federal de Lavras, Campus Universitário, CP 3037, CEP 37200-000, Lavras, MG, Brazil
- Centro Brasileiro de Estudos em Ecologia de Estradas, Universidade Federal de Lavras, Campus Universitário, CP 3037, CEP 37200-000, Lavras, MG, Brazil
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Ngo CD, Ngo BV, Hoang TT, Nguyen TT, Dang HP. Feeding ecology of the common sun skink, Eutropis multifasciata(Reptilia: Squamata: Scincidae), in the plains of central Vietnam. J NAT HIST 2015. [DOI: 10.1080/00222933.2015.1021876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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