Resumo em Inglês:
The post-embryonic development of the crab from the north coast of São Paulo State, Eriphia gonagra (Fabricius) was studied in laboratory. The experiments were performed in a climatically controlled room at 24±1ºC at a salinity of 36‰ and the animals were fed with newly hatched Artemia salina nauplii. The larval development of E. gonagra comprises 4 stages of zoea and one megalopa. All larval stages are illustrated and described in detail. The main morphological characters that allow the Identification of the zoeae and megalopae of E. gonagra are analyzed with respect to other Brasilian species of the family Xanthidae.Resumo em Inglês:
All the larval stages of the hermit crab Pagurus brevidactylus were studied in the laboratory, with special emphasis on external morphology and on the duration of each stage. The larvae were kept in individual containers, with water of 35‰ salinity and fed on nauplii of Artemia salina; room temperature was maintained at 24±1ºC. The post-embryonic development includes four stages of zoea and one of megalopa. All the larval stages are drawn and described in detail.Resumo em Inglês:
Randomly sampled oothecae of a natural population of Gratiana spadicea from the outskirts of Porto Alegre, RS, were dissected. The overlapping of the egg membranes makes possible to enumerate the eggs in a batch and therefore to relate mortality to position in the ootheca. The ootheca of this cassid provides a spatial refuge for some of its eggs. Successful eggs of G. spadicea amounted to less than one fifth of the total in each batch. Parasitoids and predators were responsible for a high mortality of eggs whatever the size of the ootheca. The main cause of mortality was the eulophid wasp Emersonella ooecia De Santis, 1983. A large proportion of eggs were sucked dry by the mirid Tupiocoris cincticornis (Stal, 1860). The sucked eggs could have contained either the embryo of G. spadicea or the parasitoid in the pre-emergence stages.Resumo em Inglês:
Four spittlebugs belonging to the Ischnorhinini (Hom., Auchenorhyncha), occurring in Rio Grande do Sul (Brazil), with respective synonymy and distribution, are characterized in the present paper. Also keys for the distinction of Brazilian tribes, genera and species are presented.Resumo em Português:
Os, caracteres morfo-anatômicos do sistema genital e glândula pediosa de Phyllocaulis soleiformis são redescritos após exame de 30 espécimes provenientes de Porto Alegre e arredores. Dados biométricos, média e intervalo de cada caráter são também incluídos. Após análise estatística, propõem-se índices de proporção dos característicos descritivos válidos para a espécie.Resumo em Inglês:
The morpho-anatomical characters of the genital system and pedal gland of Phyllocaulis soleiformis are redescribed after a study of 30 specimens from Porto Alegre and surroundings. Biometric data, average and interval of each character are also included. After the statistical analysis we propose proportion indexes of those descriptive characteristic as valid for this species.Resumo em Inglês:
The growth of body proportions of Sardinella brasiliensis was not homogeneous in the study area, between Macaé (RJ) and Santa Catarina Island (SC); the growth rates (K) of the von Bertalanffy growth curve were greater than growth rates for another áreas. In this area the biomass estimates for pelagic fish is poor, and near Cabo Frio occurs an upwelling zone. These facts permit the sardines to attain large lengths in this area. Between Rio de Janeiro and Florianópolis the growth rates were lower than in the northern part and Paranaguá Bay. On the other hand the biomass estimates for pelagic fish in Rio de Janeiro-Florianópolis region was very high, and in this zone the population density is high and the growth rates are small. Paranaguá Bay is a particular region because of its geographical and oceanographic conditons; this is a shelter region with different features and the sardines living there attain small length. In this area the growth rates are intermediary among growth rates for fishes from Macaé-Cabo Frio and Rio de Janeiro-Florianópolis regions. Therefore, the growth rates for sardines in southeast Brazilian proves to be dependent of the population density, food and oceanographic conditions.