|
|
|
|
|
| Costa,Paulo V.; Silva,Ubiratã A. T. da; Ventura,Robson; Ostrensky,Antonio; Angelo,Leandro. |
| Fish predation is thought to exert an important influence on the demographical dynamics of larvae and juveniles of estuarine brachyuran crabs but few studies have investigated this phenomenon in nature. In this study, fishes were captured during full moons (in January and February 2005), when many brachyuran species are known to release their larvae. Samples were carried out in the Pinheiros river, Guaratuba Bay, Paraná, Brazil. The stomach contents of collected fishes were surveyed to determine the species that are most likely to prey on brachyuran immature forms in this location. Two techniques were used to capture fishes: manual samplings, using a 5-mm mesh size net (1.8m depth), and bottom trawling with a 20-mm mesh size net. The collected specimens... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crab; Megalopae; Osteichthyes; Predator; Ucides cordatus; Zoeae. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000200005 |
| |
|
|
| Ventura,Robson; Silva,Ubiratã A. T. da; Ostrensky,Antonio; Cottens,Kelly; Perbiche-Neves,Gilmar. |
| Target areas for Ucides cordatus (Linnaeus, 1763) restocking programs are often located far from the laboratory where larval rearing is developed. During translocation, the larvae are submitted to highly stressful conditions due to handling, packing, and transport activities. The aim of the present study was to assess the mortality rates of U. cordatus megalopae caused by different transportation procedures. Megalopae at loading densities of 50, 150, and 300 ind.L-1 were packed in double polyethylene 12 x 25 cm plastic bags with 200 ml of marine water at salinity 30. The bags were filled with oxygen at a proportion of 1:2 parts of water and sealed tightly. The trepidations during transport were simulated by the use of a shaker device (800... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cannibalism; Larvae; Mangrove crab; Stress; Transport. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600001 |
| |
|
| |
|
|
|
