Irece Farina Machado

Avifauna associated to environments subjected to marine influence along Santa Catarina Coast, Brazil

Apesar dos 561,4 km e de aproximadamente 300 praias e varios estuarios ao longo da costa catarinense, informacoes sobre as aves associadas aos ambientes de influencia maritima sao escassos. Durante o periodo de abril/2002 a maio/2003 foram realizados censos trimestrais na avifauna com o objetivo de determinar a composicao e abundância dos agrupamentos, diversidade, equitabilidade e similaridade ao longo do litoral de Santa Catarina. Foram realizados 28 censos, sendo efetuados quatro por sitio e registradas a ocorrencia de 62 especies em bandos mistos, onde as aves marinhas costeiras e algumas limicolas foram as mais frequentes e abundantes.

Estágios de desenvolvimento gonodal e o comprimento médio da primeira maturação das fêmeas do camarão branco (Litopenaeus schimitti - Decapoda, Denaeidae) no extremo sul do Brasil

The stages of gonadal development for the female of white shrimp (Litopenaeus schmitti (Burkenroad, 1936)) were characterized based on histological analysis. Four stages (immature, developing, ripe and spawned) were determined according to the structure and arrangement of cells in the ovary. Each stage corresponds macroscopically to a characteristic color, except stages I (immature) and IV (spawned), in which colors are very similar and can be distinguished only microscopically. The chromatic scale varies from white/translucent (stage I), gray/green (developing), dark green to black (ripe). The mean size of cells was 54.01 μm (±3.5) (stage I), 136.80 μm (±8.8) (stage II) and 199.80 μm (±6.4) (stage III). The size frequency of cells was polymodal, and different cell stages were observed in ripe ovary, suggesting the occurrence of multiple spawning. The smallest ripe female measured 146 mm and the largest 180 mm of the total length. Estimated mean length at first maturity was 152 mm and the length at which 100% of females are mature is 170 mm.