@article{fdi:010035635,
  title = {{E}vidence of a 2-day periodicity of striae formation in the tropical scallop {C}omptopallium radula using calcein marking},
  author = {{T}h{\'e}bault, {J}ulien and {C}hauvaud, {L}. and {C}lavier, {J}. and {F}ichez, {R}enaud and {M}orize, {E}ric},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he periodicity of striae formation in the tropical scallop {C}omptopallium radula ({I}ndo-{W}est {P}acific {O}cean) was investigated with an in situ marking technique, using the calcein fluorochrome. {T}o minimize scallop stress caused by excessive handling, in situ benthic chambers were used for marking experiments. {O}nce marked, scallops (shell height range: 38.4-75.8 mm) remained on site in a large benthic enclosure and were collected at regular time intervals to count new striae formed after marking, over a period of 3 months. {A} 3-h exposure period with calcein (150 mg l(-1)) was sufficiently long to create a detectable mark in nearly shells. {I}t was, however, impossible to count the striae in 48.2% of the shells (mainly large specimens) because of a very small growth after marking. {L}ack of significant mortality during the experiments indicated that tested calcein concentrations were not lethal. {A} decrease in shell growth rate was observed after marking but the respective impacts of calcein toxicity and changes in environmental conditions could not be discriminated. {O}ur results suggest that in situ calcein marking inside benthic chambers is suitable for shell growth studies of scallops, provided the latter are not too old. {A}fter marking, the juvenile {C}. radula formed an average of one stria every 2.1 days in summer. {R}eports of 2-day periodicity in biological rhythms are rare. {S}triae formation in {C}. radula may be controlled by an endogenous oscillator, synchronized by an environmental cue acting as a zeitgeber, such as seawater temperature or sea level pressure, both of which exhibit 2-day variations in the {P}acific {O}cean. {A}s in many other scallop species, {C}. radula forms striae periodically under natural conditions, but this study shows that in pectinid juveniles, this periodicity can deviate from a daily cycle. {T}hese results suggest that {C}. radula shells have tremendous potential for recording environmental conditions during periods ranging from months to a few years and with a resolution of 2 days.},
  keywords = {},
  booktitle = {},
  journal = {{M}arine {B}iology},
  volume = {149},
  numero = {2},
  pages = {257--267},
  ISSN = {0025-3162},
  year = {2006},
  DOI = {10.1007/s00227-005-0198-8},
  URL = {https://www.documentation.ird.fr/hor/fdi:010035635},
}