|
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
*E-mail: ceamaral@unicamp.br
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
*E-mail: ceamaral@unicamp.br
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
*E-mail: ceamaral@unicamp.br
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
*E-mail: ceamaral@unicamp.br
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
*E-mail: ceamaral@unicamp.br
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
*E-mail: ceamaral@unicamp.br
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
*E-mail: mlsmello@unicamp.br
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.
*E-mail: mlsmello@unicamp.br
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.
*E-mail: vidal@unicamp.br
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
*E-mail: mlsmello@unicamp.br, vidal@unicamp.br
|
