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Early development and allometric growth in the armoured catfish Corydoras aeneus (Gill, 1858)

Frank Huysentruyt, Beatrijs Moerkerke UGent, Stijn Devaere UGent and Dominique Adriaens UGent (2009) HYDROBIOLOGIA. 627(1). p.45-54
abstract
An ontogenetic series of in-captivity bred Corydoras aeneus was used, in order to study the developmental changes in the external morphology. Allometric growth of several body parts was studied, attempting to reveal important steps in the species' early life history. Based on the external morphology, the different stages during early development of C. aeneus were identified, according to Balon (Journal of the Fisheries Research Board of Canada 32: 1663 1670, 1975). After hatching, at a SL of 3.5 mm, the developmental state corresponded to an eleutherembryonic phase, followed by the protopterygiolarval phase (4.4-5.7 mmSL), the pterygiolarval phase (5.7-14.0 mm SL) and the juvenile period. In addition, an overall growth curve and inflexion points were determined. As such, ontogenetic changes in growth coefficients k (in SL = b age(k)) were determined. Log transformed data were used for a piecewiselinear regression method, as per regression spline smoothing procedures. This way, the growth curve could be divided into six different intervals of growth rate. Initially, the slope was 0.05 until 0.7 dph, then increasing to 0.18 until 4 dph, and 0.36 until 10 dph. After this, growth rate reached a maximumof 0.76 until 24 dph, slowed down to 0.47 until 37 dph and then finally again slowed down to 0.36. A similar growth analysis was also done on the different body parts and these results were compared to both morphological and data from literature. This led to the conclusion that the inflexion points found during the early development of C. aeneus matched the different key-events known in teleost early life history and development. The transition from endo- to exogenous feeding, at the moment a functional branchial respiratory system becomes increasingly important, was the first point at which allometries changed together with functional demands. A second, similar congruence occurred at the transition to the pterygiolarval phase, when priorities shift towards locomotory needs. Finally, our results also indicated a transition to a carangiform swimming mode at approximately 8 mm SL.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
Early life history, Callichthyidae, Ontogeny, PISCES, BEHAVIOR, PATTERNS, EVOLUTION, SILURIFORMES, CALLICHTHYIDAE, DNA CONTENT, FISH LARVAE, AERIAL RESPIRATION, Larval development, Allometry, Loricarioidea
journal title
HYDROBIOLOGIA
Hydrobiologia
volume
627
issue
1
pages
45 - 54
publisher
Springer
place of publication
Dordrecht ; NETHERLANDS
Web of Science type
Article
Web of Science id
000266007800004
JCR category
MARINE & FRESHWATER BIOLOGY
JCR impact factor
1.754 (2009)
JCR rank
27/88 (2009)
JCR quartile
2 (2009)
ISSN
0018-8158
DOI
10.1007/s10750-009-9714-z
language
English
UGent publication?
yes
classification
A1
id
692058
handle
http://hdl.handle.net/1854/LU-692058
date created
2009-06-12 01:06:47
date last changed
2017-01-02 09:56:41
@article{692058,
  abstract     = {An ontogenetic series of in-captivity bred Corydoras aeneus was used,
 in order to study the developmental changes in the external morphology.
Allometric growth of several body parts was studied, attempting to reveal important steps in the species' early life history. Based on the external morphology, the different stages during early development of C. aeneus were identified, according to Balon (Journal of the Fisheries
Research Board of Canada 32: 1663 1670, 1975). After hatching, at a SL
   of 3.5 mm, the developmental state corresponded to an eleutherembryonic phase, followed by the protopterygiolarval phase (4.4-5.7 mmSL), the pterygiolarval phase (5.7-14.0 mm SL) and the juvenile period. In addition, an overall growth curve and inflexion points were determined.  As such, ontogenetic changes in growth coefficients k (in SL = b age(k)) were determined. Log transformed data were used for a piecewiselinear regression method, as per regression spline smoothing procedures. This way, the growth curve could be divided into six different intervals of growth rate. Initially, the slope was 0.05 until
   0.7 dph, then increasing to 0.18 until 4 dph, and 0.36 until 10 dph.
   After this, growth rate reached a maximumof 0.76 until 24 dph, slowed
   down to 0.47 until 37 dph and then finally again slowed down to 0.36. A
   similar growth analysis was also done on the different body parts and
   these results were compared to both morphological and data from
   literature. This led to the conclusion that the inflexion points found
   during the early development of C. aeneus matched the different
   key-events known in teleost early life history and development. The
   transition from endo- to exogenous feeding, at the moment a functional
   branchial respiratory system becomes increasingly important, was the
   first point at which allometries changed together with functional
   demands. A second, similar congruence occurred at the transition to the pterygiolarval phase, when priorities shift towards locomotory needs.
   Finally, our results also indicated a transition to a carangiform
   swimming mode at approximately 8 mm SL.},
  author       = {Huysentruyt, Frank and Moerkerke, Beatrijs and Devaere, Stijn and Adriaens, Dominique},
  issn         = {0018-8158},
  journal      = {HYDROBIOLOGIA},
  keyword      = {Early life history,Callichthyidae,Ontogeny,PISCES,BEHAVIOR,PATTERNS,EVOLUTION,SILURIFORMES,CALLICHTHYIDAE,DNA CONTENT,FISH LARVAE,AERIAL RESPIRATION,Larval development,Allometry,Loricarioidea},
  language     = {eng},
  number       = {1},
  pages        = {45--54},
  publisher    = {Springer},
  title        = {Early development and allometric growth in the armoured catfish Corydoras aeneus (Gill, 1858)},
  url          = {http://dx.doi.org/10.1007/s10750-009-9714-z},
  volume       = {627},
  year         = {2009},
}

Chicago
Huysentruyt, Frank, Beatrijs Moerkerke, Stijn Devaere, and Dominique Adriaens. 2009. “Early Development and Allometric Growth in the Armoured Catfish Corydoras Aeneus (Gill, 1858).” Hydrobiologia 627 (1): 45–54.
APA
Huysentruyt, F., Moerkerke, B., Devaere, S., & Adriaens, D. (2009). Early development and allometric growth in the armoured catfish Corydoras aeneus (Gill, 1858). HYDROBIOLOGIA, 627(1), 45–54.
Vancouver
1.
Huysentruyt F, Moerkerke B, Devaere S, Adriaens D. Early development and allometric growth in the armoured catfish Corydoras aeneus (Gill, 1858). HYDROBIOLOGIA. Dordrecht ; NETHERLANDS: Springer; 2009;627(1):45–54.
MLA
Huysentruyt, Frank, Beatrijs Moerkerke, Stijn Devaere, et al. “Early Development and Allometric Growth in the Armoured Catfish Corydoras Aeneus (Gill, 1858).” HYDROBIOLOGIA 627.1 (2009): 45–54. Print.