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Cd, Pb AND ORGANOCHLORINE PESTICIDES OF MYTELLA STRIGATA (PELECYPODA: MYTILIDAE) OF SIX COASTAL LAGOONS OF NW MEXICO
Osuna-López,José I.; Frías-Espericueta,Martín G.; López-López,Gabriel; Zazueta-Padilla,Héctor M.; Izaguirre-Fierro,Gildardo; Páez-Osuna,Federico; Ruiz-Fernández,Ana C.; Voltolina,Domenico;
Boletín de Investigaciones Marinas y Costeras - INVEMAR , 2009,
Abstract: los contenidos de cd y pb de los tejidos blandos de los mejillones de mangle mytella strigata colectados en 1996, en seis lagunas costeras del noroeste de méxico variaron entre 0.73 y 1.9 μg g-l y entre 8.3 y 17.1 μg g-l, respectivamente; los valores de ddd variaron entre 4.5 y 119 ng g-l los de dde desde menos del límite de detección (
Análise dos indicadores bacterianos de polui??o dos rios Anil e Bacanga, na Ilha de S?o Luís, Estado do Maranh?o, Brasil
Lee Liao,Po-Shiang Deborah; Bezerra,José de Macêdo; Bastos,Othon de Carvalho; Barreto,Gilda Maira de Carvalho;
Revista de Saúde Pública , 1984, DOI: 10.1590/S0034-89101984000400003
Abstract: sampling of liquids was carried out monthly at both high and low tide, for one year, at 5 sites on the anil river and at 3 sites on the bacanga river, for bacteriological pollution study. total viable bacteria/100ml, mpn (most probable numbers) of coliforms/100ml and mpn fecal coliforms/100ml were determined by the use of nutrient agar, lactose broth, brilliant green - lactose bile broth and e c broth. the results indicated that both rivers contained a higher bacterial concentration at the sources and showed a seasonal bacteriological pollution variation directly related to the tidal phases. according to the brazilian ministry of the interior's standards, the water of both rivers presented a high degree of microbial pollution.
A new occurrence of Limnoperna fortunei (Dunker 1856) (Bivalvia, Mytilidae) in the State of S?o Paulo, Brazil
Avelar, W. E. P.;Martim, S. L.;Vianna, M. P.;
Brazilian Journal of Biology , 2004, DOI: 10.1590/S1519-69842004000500002
Abstract: the freshwater mussel limnoperna fortunei (dunker 1856) (bivalvia, mytilidae) has been found in the paraná river, near rosana, s?o paulo. this is the first record of this specie in s?o paulo state. this population of limnoperna fortunei seems to be young and in a colonization process.
Anatomia funcional de Perna perna (Linné) (bivalvia, Mytilidae)
Narchi, Walter;Galv?o-Bueno, Mario Sérgio;
Revista Brasileira de Zoologia , 1997, DOI: 10.1590/S0101-81751997000100014
Abstract: perna perna (linné, 1758) occurs on the atlantic littoral from venezuela to uruguay. the main organ systems were studied in the living animais, particular attention being paid to the ciliary feeding and cleansing mechanisms in the mantle cavity. the anatomy, functioning of the stomach and the ciliary sorting mechanisms are described. the siphons belong to type a (yongf. 1948b), the ctenidia to type b( 1) (atkins 1936c) and the stomach is of type iii (purchon 1957) or section i (dinamani 1967) with sorting mecanisms of type a and b (reid 1965). a general comparison was made between the genera of the mytilidae known and some features of mytella soot-ryen, 1955.
istribution of natural beds and stocks estimate of Genera Mytella in the Cananéia estuary, S o Paulo State, Brazil. istribution of natural beds and stocks estimate of Genera Mytella in the Cananéia estuary, S o Paulo State, Brazil.
O. M. Pereira,M. S. N. Galv?o,C. M. Pimentel,M. B. Henriques
Brazilian Journal of Aquatic Science and Technology , 2007,
Abstract: The purpose of this study was to determine the distribution and size of natural stocks of the mussels Mytella guyanensis (Lamarck, 1819) and M. falcata (d’Orbigny, 1846) in the Cananéia–Iguape–Ilha Comprida lagoon estuarine system. Samples of mussels and related information were collected in four areas distributed along Cubat o Sea (I), Trapandé Bay (II), Ararapira Channel (III) and Cananéia Sea (IV) from June 2004 to June 2005. Each area was subdivided in plots that represented the mussels natural banks. The total area occupied by the mussels was estimated. From each one of the 48 delimited plots, 120 samples were collected along 2 transects, summing up 5.760 samples. The animals were counted, measured for length and weight. It was impossible to estimate the stock of M. falcata, due the very low number of individuals. The data presented are from M. guyanensis. The bivalves’ density (no/m2) ranged from 0.64 to 188.35, showing a heterogeneous distribution among plots. The total area occupied by the bivalves was 438.824 m2, with an estimated population of 18.646.453 mussels. Within this population 44.5% were of commercial size (> 40 mm). The maximum length observed was 72 mm. The most appropriate sites for mussel extraction are located in Cubat o Sea (I) and Cananéia Sea (IV) as these had higher biomass and greater numbers of individuals of commercial size. The results of this research shall contribute to a rational extraction policy. The purpose of this study was to determine the distribution and size of natural stocks of the mussels Mytella guyanensis (Lamarck, 1819) and M. falcata (d’Orbigny, 1846) in the Cananéia–Iguape–Ilha Comprida lagoon estuarine system. Samples of mussels and related information were collected in four areas distributed along Cubat o Sea (I), Trapandé Bay (II), Ararapira Channel (III) and Cananéia Sea (IV) from June 2004 to June 2005. Each area was subdivided in plots that represented the mussels natural banks. The total area occupied by the mussels was estimated. From each one of the 48 delimited plots, 120 samples were collected along 2 transects, summing up 5.760 samples. The animals were counted, measured for length and weight. It was impossible to estimate the stock of M. falcata, due the very low number of individuals. The data presented are from M. guyanensis. The bivalves’ density (no/m2) ranged from 0.64 to 188.35, showing a heterogeneous distribution among plots. The total area occupied by the bivalves was 438.824 m2, with an estimated population of 18.646.453 mussels. Within this population 44.5% were of commercial size
EROSIVE PROCESSES AT BACANGA STATE PARK AREA
Francicléia Vieira Ribeiro,Marcia Silva Furtado,Neilianne de Fátima Costa Lima,Lenir Cardoso Brito
Revista Sociedade & Natureza , 2005,
Abstract: The conservation measures of the areas reached by irrational way of exploration were adopted in the attempt to preserve the Brazilian ecosystems. There are many Conservation Units, where (theorically) the nature has larger possibilities to resist the human aggressions.In Maranh o there are 10 Conservation Units, two Federal ones and 8 State ones. The state park of Bacanga, which is the object of this work, is a State Conservation Unit located in Maranh o Island founded in 1980 and its objective is to preserve the flora, the fauna and the local springs.Despite the importance of the local ecosystem and the supervision of the responsible institutions, the real predatory actions in the area reflect the lack of ecologic conscience from who attacks the Nature extracting in a criminal way its natural resources.The environment degradation is evident when the erosive processes intensified by the human activities are observed in the local like: removal of the vegetation, the use of the agricultural practice, the urbanism, among others. Those acellerated erosive processes have reached specially the geomorphology of the Park. The silting of the river, the gullies and ravines have standed out in this sceneny of degradation of the soils.This work deals with enviromental problems caused by the human interference that influence directly in the equilibrium of local ecosystem.
Seasonal variation in larval density of Limnoperna fortunei (Bivalvia, Mytilidae) in the Igua?u and Paraná rivers, in the region of Foz do Igua?u, Paraná, Southern Brazil
Pestana, Débora;Pie, Marcio Roberto;Ostrensky, Antonio;Boeger, Walter Antonio;Andreoli, Cleverson;Franceschi, Francisco;Lagos, Patrícia;
Brazilian Archives of Biology and Technology , 2008, DOI: 10.1590/S1516-89132008000300023
Abstract: the larval density of the invasive mussel limnoperna fortunei (bivalvia, mytilidae) was monitored from january 2005 to february 2006 at two points along the paraná and the igua?u rivers, near foz do igua?u, pr, brazil. the results indicated two density peaks in the paraná river: a lower peak between march and june and a higher peak in october. in the igua?u river, the values were much lower, yet they also showed a peak between september and october. a reduction in the reproductive activity was observed in both the rivers between july and august. the average larval density at the collection point in the paraná reached 948.5 larvae/m3, with a peak of 2,999.5 larvae/m3 in october. the present study represented the first quantification of the larval density of l. fortunei in the lower reaches of the igua?u river, downstream of the igua?u falls.
Larval development of Brachidontes solisianus (Bivalvia, Mytilidae): with notes on differences between its hinge system and that of the mollusk Perna perna
Monteiro-Ribas, W.;Rocha-Miranda, F.;Romano, R. C.;Quintanilha, J.;
Brazilian Journal of Biology , 2006, DOI: 10.1590/S1519-69842006000100014
Abstract: this work, which is part of a study program on meroplankton larvae, aims to gain more in-depth knowledge about planktonic larvae. this study began with the mollusk brachidontes solisianus (bivalvia - mytilidae), which is abundant on the rocky shores of the cabo frio region (state of rio de janeiro, brazil). brachidontes solisianus larvae were grown under controlled conditions for a period of 26 days and were fed with isochrysis galbana and tetraselmis chui. the temperature was kept at 26 °c and the saltiness at 28?. images of the larvae were taken daily with a light camera and measured with a micrometric lens until settlement occurred. the average size of the first d-shaped veliger stage was 90 μm in length and 70 μm in height, while the size in the last stage before settlement (pediveliger) was 273 μm in length and 257 μm in height. the comparative study of the hinge system involved the most abundant intertidal species of the study area: brachidontes solisianus and perna perna. the b. solisianus species were found to have more visible denticles at the extremities of the provinculum, whereas the denticles of the p. perna species occur along the entire provinculum.
Terpenoids and Flavones from Achillea falcata (Asteraceae)  [cached]
Maurizio Bruno,Sergio Rosselli,Rosa Angela Raccuglia,Antonella Maggio
Revista de la Sociedad Química de México , 2003,
Abstract: El análisis químico de las partes aéreas de Achillea falcata permitió la caracterización de los monoterpenos 3,7-dihidroxi-3,7- dimetil-1,5-octadieno y 3,6-dihidroxi-3,7-dimetil-1,7-octadieno, la lactona sesquiterpénica sintenina y los flavonoides 5-hidroxi-6,7,3′,4′- tetrametoxi-flavona (6,7,3′,4′-tetrametil éter de 6-hidroxi-luteolina) y 5-hidroxi-6,7,8,3′,4′-pentametoxiflavona (desmetoxinobiletina).
Using microsatellite (SSR) and morphological markers to assess the genetic diversity of 12 falcata (Medicago sativa spp. falcata) populations from Eurasia
P Li, Y Wang, X Sun, J Han
African Journal of Biotechnology , 2009,
Abstract: Falcata (Medicago sativa spp. falcata L.), with its high resistance to cold weather, drought and disease, plays an important role in alfalfa breeding. The aim of this study was to assess the genetic diversity of the 12 falcata populations in Eurasia using SSR markers and morphological traits. Regressions for genetic distance, phenotypic distance and geographic distance were also computed to study whether the origin of these populations influenced their genetic or morphological behavior. A total of 22 SSR alleles were detected in 12 populations, and the average genetic diversity of each population ranged from 0.2517 to 0.4965, indicating substantial variation within populations. Among the 12 populations, three had flowers of colors other than yellow, indicating introgression before seed collection. These three populations grew in a more erect manner and clustered into a sub-group for phenotypic distance. Regression analysis showed no relationship between genetic distance and phenotypic distance. Latitude, longitude and altitude of origin were not correlated with genetic distance among populations, while altitude had a correlation with phenotypic distance among these populations (p < 0.0001).
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