Development of Swimming and Feeding Functions in Larval Turbot, Psetta maxima, Reared in the Laboratory
Abstract
Developmental sequences of swimming- and feeding-related structures were examined in laboratory-reared larvae of the turbot, Psetta maxima. The following five swimming and four feeding developmental stages were recognized. Swimming: 1) primitive swimming stage (from hatching to D-13) - no swimming-related characters developed other than pectoral fin supports; 2) caudal fin swimming stage (D-13 to D-17/20) - notochord flexion begin to develop accomplished, and caudal fin rays and fin supports begin to develop; 3) caudal fin + axial swimming stage (D-17/20 to D-25) - vertebrae with haemal and neural arches and spines developed; 4) well-balanced swimming stage (D-25 to D-30) - dorsal and anal fin-ray complements completed; 5) completed stage (beyond D-30) - larvae considered to have acquired juvenile swimming ability. Feeding: 1) basic sucking stage (D-2 to D-9/13) - mouth opens and oral cavity elements (e.g. suspensorium, hyoid arch and opercular bones begin to develop; 2) functional sucking stage (D-9/13 to D-15/17) - further development and initial ossification of oral cavity elements; 3) sucking + biting stage (D-15/17 to D-30) - jaw and pharyngeal teeth increase in number, some degree of ossification in all oral cavity elements; 4) completed stage (beyond D-30) - larvae considered to have acquired juvenile feeding ability. Previously-recognized critical periods for larval turbot, observed at around D-10 to D-20, corresponded to transformation phases from the primitive, basic modes to stable, more functional modes in both swimming and feeding functional development.
Development of Swimming and Feeding Functions in Larval Turbot, Psetta maxima, Reared in the Laboratory
Abstract
Developmental sequences of swimming- and feeding-related structures were examined in laboratory-reared larvae of the turbot, Psetta maxima. The following five swimming and four feeding developmental stages were recognized. Swimming: 1) primitive swimming stage (from hatching to D-13) - no swimming-related characters developed other than pectoral fin supports; 2) caudal fin swimming stage (D-13 to D-17/20) - notochord flexion begin to develop accomplished, and caudal fin rays and fin supports begin to develop; 3) caudal fin + axial swimming stage (D-17/20 to D-25) - vertebrae with haemal and neural arches and spines developed; 4) well-balanced swimming stage (D-25 to D-30) - dorsal and anal fin-ray complements completed; 5) completed stage (beyond D-30) - larvae considered to have acquired juvenile swimming ability. Feeding: 1) basic sucking stage (D-2 to D-9/13) - mouth opens and oral cavity elements (e.g. suspensorium, hyoid arch and opercular bones begin to develop; 2) functional sucking stage (D-9/13 to D-15/17) - further development and initial ossification of oral cavity elements; 3) sucking + biting stage (D-15/17 to D-30) - jaw and pharyngeal teeth increase in number, some degree of ossification in all oral cavity elements; 4) completed stage (beyond D-30) - larvae considered to have acquired juvenile feeding ability. Previously-recognized critical periods for larval turbot, observed at around D-10 to D-20, corresponded to transformation phases from the primitive, basic modes to stable, more functional modes in both swimming and feeding functional development.
Details
| Primary Language | Turkish |
|---|---|
| Journal Section | Articles |
| Authors | |
| Publication Date | December 1, 2000 |
| Published in Issue | Year 2001 Volume: 1 Issue: 2 |