| Author(s): |
Total Authors: 3
|
| Affiliation: | [1] Univ Fed Sao Carlos, Dept Biol, BR-18052780 Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Inst Biociencias, Dept Zool, BR-05422970 Sao Paulo - Brazil
[3] Nat Hist Museum, Dept Life Sci, London SW7 5BD - England
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Ichthyological Exploration of Freshwaters; v. 25, n. 2, p. 103-158, SEP 2014. |
| Web of Science Citations: | 15 |
| Abstract | |
Ontogenetic data for Neotropical Characiformes, Siluriformes and Gynmotiformes is still poorly explored and information on their skeletal development is lacking entirely. We herein studied the skeletal development of the basal characid Salminus brasiliensis to provide an ontogenetic approach that can be used in further comparative investigations. Our study was based on 153 specimens (3.2 mm NL to 27.5 mm SL) covering approximately 30 days post-hatching and included 147 bones. Specimens were cleared and double stained and the presence of a bone was scored whenever mineralization was detected. First ossifications start at 5.0 ram (cleithrum, and tooth plates of pharyngobranchial 4 and ceratobranchial 5). Ossification continues with the opercle (5.1 mm) and remaining tooth bearing bones (premaxilla and dentary at 5.1 mm, maxilla at 5.6 mm). The first bones to ossify in the neurocranium are the parasphenoid and basioccipital (7.4 mm), exoccipital (8.7 mm) and frontal (11.9 mm). The hyopalatine arch begins ossification with the quadrate (7.8 mm) and hyomandibular (8.1 mm). Branchial arches commence their ossification with ceratobranchials (8.5 mm), followed by epibranchials (10.4 mm) and pharyngobranchials (11.8 mm). The infraorbital series is the last skeletal complex to ossify starting with the antorbital (16.8 mm). The first ossifications of the axial skeleton are the vertebral centra (9.9 mm) followed by neural (11.1 mm) and haemal arches (12.0 mm). Weberian apparatus ossification starts with the vertebral centra (9.9 mm), neural arches (11.1 mm), intercalarium and scaphium (12.4 mm). Fin rays form first in the caudal fin (8.6 mm), followed by dorsal-, anal-, pectoral-and pelvic-fin rays (9.9, 10.4, 15.7, 16.8 mm, respectively). The endoskeletal fin supports begin to ossify with the proximal-middle radials of the anal and dorsal fins (12.5 and 12.7 mm, respectively), pelvic bone and scapula (17.5 mm). Diagrams of the sequences of ossification are provided. (AU) | |
| FAPESP's process: | 12/01075-1 - Proposal of research internship abroad associated with the pos-doc project Phylogenetic Study of Priocharax Weitzman & Vari (Teleostei, Characiformes, Characidae) in the Ontogenetic Context: an Approach of the Miniaturization Process |
| Grantee: | George Mendes Taliaferro Mattox |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |