Determinação da maturidade sexual de Ucides cordatus (Crustacea, Brachyura, Ucididae) em duas áreas de manguezal do litoral sul de Pernambuco, Brasil

Este estudo foi desenvolvido com o objetivo de determinar o tamanho da maturidade morfológica e fisiológica de machos e fêmeas em duas populações de Ucides cordatus (Linnaeus, 1763) de Tamandaré, Pernambuco, Brasil. Os caranguejos foram coletados mensalmente (abril/2008 a março/2009) nos manguezais dos rios Ariquindá e Mamucabas, por um catador, através da técnica de braceamento, durante a maré baixa em três áreas distintas de 25 m² cada. Os caranguejos capturados foram separados por sexo e medidos (largura da carapaça, comprimento do própodo do quelípodo dos machos e largura do 5º somito abdominal das fêmeas). Além disso, os caranguejos foram caracterizados em relação ao estágio de desenvolvimento gonadal. Os caranguejos com gônadas imaturas e rudimentares foram considerados jovens, enquanto os demais foram classificados como adultos (gônada em desenvolvimento, desenvolvida, avançada ou esgotada). O tamanho da largura da carapaça no qual 50% da população de U. cordatus foi considerada madura morfologicamente foi de 38,0 mm (machos) e 35,4 mm (fêmeas) em Ariquindá, enquanto para Mamucabas estes valores foram de 37,3 e 32,9 mm, respectivamente. Na determinação da maturidade sexual fisiológica, os machos e fêmeas de Ariquindá foram considerados maduros com 38,5 e 37,8 mm, respectivamente, enquanto em Mamucabas os tamanhos obtidos foram de 36,2 e 35,8 mm. A maturidade morfológica dos machos ocorreu com tamanho superior ao das fêmeas, provavelmente devido ao seu maior investimento em crescimento somático, enquanto as fêmeas investem mais no processo reprodutivo. Os caranguejos provenientes do manguezal de Mamucabas atingiram a maturidade sexual com tamanhos inferiores aos de Ariquindá, provavelmente devido ao maior impacto verificado para este manguezal.

Flore des serres et des jardins de l'Europe :ou descriptions et figures des plantes les plus rares et les plus méritantes, nouvellement introduites sur le continent ou en Angleterre ...

v.14 (1859-1861)

Escarabeíneos copro-necrófagos (Coleoptera, Scarabaeidae, Scarabaeinae) de fragmentos de Mata Atlântica em Silveira Martins, Rio Grande do Sul, Brasil

A fauna de Scarabaeinae (Coleoptera: Scarabaeidae) foi amostrada através de armadilhas de queda iscadas com excremento humano e peixe apodrecido em fragmentos florestais de Silveira Martins, Rio Grande do Sul, Brasil, de novembro de 2010 a janeiro de 2011. Foi coletado um total de 1.611 indivíduos, pertencentes a seis tribos, 11 gêneros e 28 espécies. As espécies mais abundantes foram Canthon latipes Blanchard, 1845 (49,9%), C. chalybaeus Blanchard, 1845 (13,9%), Deltochilum sculpturatum Felsche, 1907 (4,9%) e Eurysternus caribaeus (Herbst, 1789) (4,3%), que juntas representaram 73% do total de indivíduos capturados. As armadilhas iscadas com excremento humano capturaram maior número de espécies do que as iscadas com peixe apodrecido. Não houve diferença estatística significativa entre os tipos de iscas utilizados em relação à abundância de Scarabaeinae. A maior parte da comunidade de Scarabaeinae capturada foi representada por espécies de hábito alimentar generalista e comportamento escavador. A comunidade amostrada segue os padrões gerais de estrutura trófica e comportamental de Scarabaeinae encontrados por toda a região Neotropical.

Transactions of the Highland and Agricultural Society of Scotland.

ser. 4 vol. 11

Width-weight relationship and condition factor of Ucides cordatus (Crustacea, Decapoda, Ucididae) at tropical mangroves of Northeast Brazil

The present contribution aims at evaluating the carapace width vs. humid weight relationship and the condition factor of Ucides cordatus (Linnaeus, 1763), in the mangrove forests of the Ariquindá and Mamucabas rivers, state of Pernambuco, Brazil. These two close areas present similar characteristics of vegetation and substrate, but exhibit different degrees of environmental conservation: the Ariquindá River is the preserved area, considered one of the last non-polluted of Pernambuco, while the Mamucabas River suffers impacts from damming, deforestation and deposition of waste. A total of 1,298 individuals of U. cordatus were collected. Males were larger and heavier than females, what is commonly observed in Brachyura. Ucides cordatus showed allometric negative growth (p < 0.05), which is probably related to the dilatation that this species develops in the lateral of the carapace, which stores six pairs of gills. The values of b were within the limit established for aquatic organisms. Despite of the condition factor being considered an important feature to confirm the reproductive period, since it varies with cyclic activities, in the present study it was not correlated to the abundance of ovigerous females. However, it was considered a good parameter to evaluate environmental impacts, being significantly lower at the impacted area.

Temporal and spatial variation of rocky shores intertidal benthic communities in Southeast Brazil

The relationships between environmental factors and temporal and spatial variations of benthic communities of three rocky shores of the state of Espírito Santo, Southeast Brazil, were studied. Sampling was conducted every three months, from August 2006 to May 2007, using intersection points. Chthamalus bisinuatus (Pilsbry, 1916) (Crustacea) and Brachidontes spp. (Mollusca) were the most abundant taxa, occupying the upper level of the intertidal zone of the rocky shore. The species richness was higher at the lower levels. The invasive species Isognomon bicolor (C. B. Adams, 1845) (Mollusca) occurred at low densities in the studied areas. The clustering analysis dendrogram indicated a separation of communities based on exposed and sheltered areas. According to the variance analyses, the communities were significantly different among the studied areas and seasons. The extent of wave exposure and shore slope influenced the species variability. The Setibão site showed the highest diversity and richness, most likely due to greater wave exposure. The communities showed greater variation in the lower levels where environmental conditions were less severe, relative to the other levels.

Plantarum brasiliensium :decas prima [-tertia]

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Plantarum brasiliensium :decas prima [-tertia]

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Plantarum brasiliensium :decas prima [-tertia]

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Brehms Tierleben. Allgemeine kunde des Tierreichs. Mit etwa 2000 Abbildungen im Text, über 500 Tafeln in Farbendruck, Kupferätzung und Holzschnitt und 13 Karten

Bd. 1

Brehms Tierleben. Allgemeine kunde des Tierreichs. Mit etwa 2000 Abbildungen im Text, über 500 Tafeln in Farbendruck, Kupferätzung und Holzschnitt und 13 Karten

Bd. 2

Cytochemical characterization of gill and hepatopancreatic cells of the crab Ucides cordatus (Crustacea, Brachyura) validated by cell metal transport

Ucides cordatus (Linnaeus, 1763) is a hypo-hyper-regulating mangrove crab possessing gills for respiratory and osmoregulatory processes, separated in anterior and posterior sections. They also have hepatopancreas, which is responsible for digestion and absorption of nutrients and detoxification of toxic metals. Each of these organs has specific cells that are important for in vitro studies in cell biology, ion and toxic metals transport. In order to study and characterize cells from gills and hepatopancreas, both were separated using a Sucrose Gradient (SG) from 10 to 40% and cells in each gradient were characterized using the vital mitochondrial dye DASPEI (2-(4-dimethylaminostyryl)-N- ethylpyridinium iodide) and Trichrome Mallory's stain. Both in 20 and 40% SG for gill cells and 30% SG for hepatopancreatic cells, a greater number of cells were colored with DASPEI, indicating a larger number of mitochondria in these cells. It is concluded that the gill cells present in 20% and 40% SG are Thin cells, responsible for respiratory processes and Ionocytes responsible for ion transport, respectively. For hepatopancreatic cells, the 30% SG is composed of Fibrillar cells that possess larger number of membrane ion and nutrient transporters. Moreover, the transport of toxic metal cadmium (Cd) by isolated hepatopancreatic cells was performed as a way of following cell physiological integrity after cell separation and to study differences in transport among the cells. All hepatopancreatic cells were able to transport Cd. These findings are the first step for further work on isolated cells of these important exchange epithelia of crabs, using a simple separation method and to further develop successful in vitro cell culture in crabs.