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Instituto de Biologia Unicamp
Abstracta 2003








P001-03 Spatial distribution of mollusks in sheltered beaches in southeastern of Brazil
Arruda EP, Amaral ACZ*
The spatial distribution of mollusks in the intertidal region was studied monthly from August 1995 through July 1997, in Enseada, Barra Velha and Araçá beaches in southeastern Brazil. One study sector was determined in Enseada and Barra Velha, and two sectors in Araçá. Each sector was divided into three horizontal levels: lower, middle and upper, where the samples were taken with one cylindrical corer of 0.16 m2. The mollusks were distributed in the sectors as follows: Enseada – Olivella minuta (Link, 1807) in the lower level and Tagelus plebeius (Lighfoot, 1786) in the upper level; Araçá I – O. minuta in the lower level, Tellina lineata Turton, 1819 and Anomalocardia brasiliana (Gmelin, 1791) in the middle levels; Araçá II – Cerithium atratum (Born, 1778) in the lower level, O. minuta in the lower and middle levels, A. brasiliana and Corbula caribaea Orbigny, 1842 in the middle level; Barra Velha – Tagelus divisus (Spengler, 1794), Lucina pectinata (Gmelin, 1791) and Tellina versicolor (Lighfoot, 1786) in the lower level, A. brasiliana and Macoma constricta (Brugüìere, 1792) in the upper level. The intertidal region of the study sectors could be divided into two biological zones: the upper zone, where T. plebeius, A. brasiliana and M. constricta were more abundant; and the lower zone, where O. minuta, C. atratum, T. lineata, T. versicolor, C. caribaea, T. divisus and L. pectinata were abundant.
Revista Brasileira de Zoologia 20: 291-300, 2003

P002-03 Articulatia, a new genus of Terebellinae (Polychaeta, Terebellidae) living in brazilian corals
Nogueira JMM, Hutchings PA, Amaral ACZ*
A new genus of terebellid polychaetes is described, from material collected from living colonies of a stony coral (Mussismilia hispida) in the State of São Paulo, southeastern Brazil. This new genus is compared with other terebelline genera, and the phylogenetic analysis previously performed for the group is rerun, determining the position of Articulatia within the subfamily.
Journal of the Marine Biological Association of the United Kingdom 83: 761-770, 2003. IF = 0.716

P003-03 Mollusc Feeding Guilds on Sandy Beaches in São Paulo State, Brazil
Arruda EP, Domaneschi O, Amaral ACZ*
The feeding guilds of four communities of molluscs living in the intertidal zone of Enseada in Caraguatatuba Bay and Barra Velha and Araçá beaches along the São Sebastião Channel were identified. Data were obtained from qualitative analyses of the digestive tract contents and from observations on the feeding behaviour of the gastropod Olivella minuta and the bivalves Tagelus plebeius, Macoma constricta, Tellina lineata and Tellina versicolor. Six feeding guilds were identified. The SDS (suspension feeder, discreetly motile, inhalant siphon and ctenidia) and DDS (deposit feeder, discreetly motile, inhalant siphon and ctenidia) groups were more abundant. The species in the SDS feeding guild tended to occur in areas with lower salinity and moderate- to well-sorted sediments with very fine sand predominating. The distribution of the feeding guilds correlated best with salinity, particle size distribution, and the contents of silt-clay and organic matter in the sediment.
Marine Biology 143: 691-701, 2003. IF = 1.841

P004-03 Intertidal macrofauna in brazilian subtropical tide-dominated sandy beaches
Amaral ACZ, Denadai MR, Turra A, Rizzo AE
An integrated program “Fauna de Praia” (Sandy Beach Fauna) was conducted to investigate the macrofauna of the intertidal sandy beaches in São Sebastião Channel (São Paulo State, Brazil). Ten-meter wide strips with widths corresponding to the tidal range were marked and sampled on each sandy beach. Samples were taken monthly between August 1995 and July 1997, using two corers (0.01 and 0.16 m2). Mean grain size and sorting coefficient, silt, calcium carbonate and organic matter contents, and salinity were recorded to characterize each study site. Six environmental types were recognized among the 13 study sites, grouped in relation to environmental variables and species composition. Polychaetes dominated in richness and abundance, followed by molluscs and crustaceans. Organic enrichment in some areas of São Sebastião Channel was evidenced by the presence of indicator species but the organic matter content was showed to not influence species composition. Higher richness was positively related to higher values of salinity and coarser sand grains, while calcium carbonate content has a positive influence on density. Environmental type identification is an important instrument available for decision-making in São Sebastião Channel and other similar seascapes. However, consistent conservationist proposes should be applied to the entire channel once its circulation pattern integrated these environmental types and may quickly spread local impacts.
Journal of Coastal Research 35: 446-455, 2003. IF = 0.772

P005-03 Sandy Beach Morphodynamic and the Polychaete Fauna in Southeast Brazil
Omena E P, Amaral ACZ*
This study was aimed to examine the influence of beach morphodynamic on polychaete intertidal fauna from protected sandy beaches. The spatial distribution of polychaete from four beaches of different slopes and grain sizes were analyzed at São Sebastião Channel in the northern coast of São Paulo State. The beaches were divided into 3 levels (high, low and middle) across the intertidal zone by 10 meter wide transects. Five random corers (0.01 m2) were collected monthly from August/1995 until December/1997 in an area of 100 m2 for each level. Grain size, organic matter, slope profile and moisture content from the three levels were analyzed. Differences in overall fauna density were observed among the four study sites as well as along the intertidal levels. The higher levels of the beaches had higher faunal density than the middle and lower ones. The numerically dominant species on fine sediment sites, were Laeonereis acuta and Capitella capitata, whereas on coarse ones the spionid Scolelepis squamata predominated. The structural parameters studied here, such as density, diversity and eveness were affected by grain size properties as well as tide range, slope profile and moisture content variation. The results showed that even under sheltered conditions beach morphodynamics can influence intertidal polychaete fauna.
Journal of Coastal Research 35: 431-439, 2003. IF = 0.772

P006-03 Progoniada and Goniadella (Annelida: Polychaeta: Goniadidae) from the outer continental shelf and slope off south-eastern Brazil
Rizzo A E, Amaral ACZ*
Species of the genera Progoniada and Goniadella are recorded from off the Brazilian coast, from depths of 93 to 808 m. The description of Progoniada regularis is complemented with new data on the number of chevrons and micrognaths. Goniadella revizee n. sp. is described; it differs from the five known species of the genus mainly in having acicular chaetae above the dorsal cirrus, together with 20-21 uniramous chaetigers. The proboscideal papillae of both species are illustrated by scanning electron micrographs.
Journal of Marine Biology Ass. U. K. 84: 47-58, 2003. IF = 0.716

P007-03 DNA content, chromatin texture and nuclear morphology in benzo[a]pyrene-transformed human breast epithelial cells after microcell-mediated transfer of chromosomes 11 and 17
Mello MLS*, Vidal BC, Lareef MH, Hu YF, Yang X, Russo J
Since abnormal chromosomes 11 and 17 have been associated with neoplastic progression in benzo[a]pyrene-transformed MCF-10F cells, image analysis was used to assess the effect of inserting normal chromosomes 11 and 17 into MCF-10F tumorigenic cells (BP1-E) by microcell-mediated chromosome transfer assay. A tendency of DNA amount distribution and nuclear size restoration to values typical of non-transformed MCF-10F cells was found especially after the transfer of normal chromosome 17. However, data on chromatin texture indicate that a more complex genome balance is required for the nuclear chromatin to recover its normal supraorganization and expression.
Cytometry 52A: 70-76, 2003. IF = 2.095

P008-03 Experimentally induced heat and cold shock tolerance in adult Panstrongylus megistus (Burmeister)
Garcia SL, Garcia NL, Oliveira LR, Rodrigues VLCC, Mello MLS*
Thermal shock tolerance in domestic male and female adults in comparison to that previously reported for nymphs was studied in P. megistus. The mechanisms that play a role in the cellular protection of this species under sequential temperature shocks were found to loose effectiveness with insect development. When tolerance differed with sex, females showed greater values than males.
Brazilian Journal of Biology 63: 449-455, 2003.

P009-03 Image analysis of dichroism in silver-impregnated collagen fibers
Vidal BC*
Linear dichroism is an important method for quantifying and statistically describing molecular order in collagen bundles at the range of the visible spectrum, since collagen is dichroic only at ? = 190-210 nm. Video image analysis was proved to be accurate and useful for obtaining a lot of complementary data on linear dichroism of collagen fiber bound silver nanoparticles.
Microscopy & Analysis 97: 21-23, 2003.

P010-03 Experimental tendon repair: glycosaminoglycan arrangement in newly synthesized collagen fibers
Mello MLS*, Vidal BC*
Changes in the macromolecular orientation and metachromasy of GAG components in newly synthesized and assembled collagen fibers in rat Achilles tendons after their excision were investigated in toluidine blue-stained tendon sections, based on microspectrophotometric evaluation of linear dichroism (LD) and of unpolarized light absorption. It was found that the normal LD pattern was still not fully attained 110 days after surgical tendon removal. The changes in LD during Achilles tendon repair were attributed to gradual modifications in the composition and macromolecular orientation of GAGs relative to the long axis of the collagen fibers.
Cellular and Molecular Biology 49: 579-585, 2003. IF = 1.153

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