MOLTING DAN PERTUMBUHAN -...
Transcript of MOLTING DAN PERTUMBUHAN -...
MOLTING DAN PERTUMBUHAN
DAUR HIDUP DAN REPRODUKSI
titi doc.2009
Decapoda : crab, lobster, shrimpDecapoda : crab, lobster, shrimp
Sudah mempunyai suatu sistem endokrin yg jelasSudah mempunyai suatu sistem endokrin yg jelas Organ- YOrgan- Y (kelenjar endokrin yang terdapat di(kelenjar endokrin yang terdapat di bagian kepala) menghasilkan hormon moltingbagian kepala) menghasilkan hormon molting ecdysoneecdysone
S IS TE M N E U R OS E K R E TOR I PADA TAN G K A I S IS TE M N E U R OS E K R E TOR I PADA TAN G K A I M ATAM ATA
Organ-X Organ-X : terdiri dari sel-sel neurosekretori, dan mempunyai axon yang menuju ke sinus gland (kelenjar sinus) Kelenjar Sinus tempat pelepasan hormon yang
dihasilkan oleh organ-X : * crustacean hyperglycemic hormone (CHH) * molt-inhibiting hormone (MIH)
* vitellogenesis-inhibiting hormone (VIH)* red pigment-concentrating hormone (RPCH)* pigment-dispersing hormone (PDH) * Pelepasan hormon distimulasi oleh sel-sel
neurosekretori dan dipengaruhi kondisi lingkungan ( a.l suhu, osmolaritas ), stress
Localization of eyestalk hormones that control severalphysiological systems from the sinus gland/X-organ complex of penaeid shrimp.
ENDOCRINE CONTROLENDOCRINE CONTROL
ECDYSIS - MOLTINGECDYSIS - MOLTING
• Exoskeleton separates from epidermis• New exoskeleton forms under old one• Old exoskeleton is shed (molted)• New exoskeleton is soft• Lobster takes on water and swells• Exoskeleton stretches to larger size• Exoskeleton hardens• Excess water is dumped from body
ECDYSIS - MOLTINGECDYSIS - MOLTING
ECDYSIS - MOLTINGECDYSIS - MOLTING
BEHAVIORAL ADAPTATIONSBEHAVIORAL ADAPTATIONS
Burrow into sediments Migrate either into or out of estuaries Migrate to spawn Adults do, young do not tolerate low or
varying salinities Calinectes sapidus (blue crab) Migrate as adults Use estuary as nursery area for juveniles Greater food, refuge (later)
BEHAVIORAL ADAPTATIONSBEHAVIORAL ADAPTATIONS
Terima KasihTerima Kasih
titi doc.2009