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| Abrunhosa,Fernando A.; Simith,Darlan J.B.; Monteiro,Joely R.C.; Souza Junior,Antonio N. de; Oliva,Pedro A.C.. |
| Feeding is an important factor for the successful rearing of larvae of the crab species. Further information on the morphological features of the foregut may to reveal larval feeding behaviour and or/whether there is a lecithotrophy in some or even in all stages of the larval cycle. In the present study, the structural development of the foregut and their digestive functions were examined in larvae of two brachyurans, Uca vocator and Panopeus occidentalis, reared in the laboratory. During larval development, the foreguts of the larvae in the first and last zoeal stages and in the megalopa stage were microscopically examined, described and illustrated. The zoeal foreguts of both species were well developed, showing specialization with a functional... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestive system; Megalopa; Panopeus occidentalis; Stomach; T/ca vocator; Zoea. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400014 |
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| Abrunhosa,Fernando A.; Simith,Darlan J.B.; Palmeira,Carlos A.M.; Arruda,Danielle C.B.. |
| Food supply is considered critical for a successful culturing of decapod larvae. However, some species may present yolk reserve sufficient to complete their larval development without external food supply (known as lecithotrophic larval development). In the present study, two experiments were carried out in order to verify whether the callianassid Lepidophthalmus siriboia have lecithotrophic behaviour or, if they need external food for their larval development: Experiment 1, larvae submitted to an initial feeding period and Experiment 2, larvae submitted to an initial starvation period. High survival rate was observed in both experiments, in which only 2 megalopae and 1 zoea III died. These results strongly suggest that larvae of L. siriboia are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behaviour; Callianassidae; Larval development; Lecithotrophy; Lepidophthalmus siriboia; Starvation. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000400005 |
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| Abrunhosa,Fernando A.; Arruda,Danielle C.B.; Simith,Darlan J.B.; Palmeira,Carlos A.M.. |
| The present study investigated whether the callianassid Callichirus major shows a lecithotrophic behaviour during larval development. Two experiments were carried out. In the first experiment, larvae were subjected to an initial period of feeding, while in the second they were subjected to an initial period of starvation. In Experiment 1, 80% of C. major larvae succeeded moulting to juvenile stage in treatment with larvae fed every day. In the treatments with larvae fed for 1, 2 and 3 days there was total mortality before they reached the megalopal stage. In Experiment 2, zoea larvae showed more resistance when subjected to an initial period of starvation in which larvae starved for 1, 2 and 3 days and had survival rates of 100, 60 and 80%, respectively.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Callichirus major; Callianassidae; Feeding; Lecithotrophic behaviour; Starvation. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000300006 |
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