Estimating growth of the Florida spiny lobster, Panulirus argus, from molt frequency and size increment data derived from tag and recapture experiments

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Abstract

Molting schedules and growth per molt of Panulirus argus were deduced by gender from size at tag and recapture of 3481 females and 3330 males released off the Florida coast during 1967-2003. Functional relationships were estimated for the intermolt period from premolt carapace length (CL) and for growth increment from premolt and postmolt CL. Starting at 5 mm CL stepwise growth functions were derived by repeatedly applying these two functions in succession. Growth curves were simulated for each sex to 30 years maximum age. At maximum age females reach a CL of 151 mm and males reach 220 mm. Significant slowdown of growth is expressed by an abrupt change in the intermolt period at the onset of maturity, while there is no evidence of a change in slope of the postmolt and premolt functions at that time. The segmented growth characterizations differ very significantly from all of the von Bertalanffy-type functions estimated for the species from indirect ageing procedures.

Original languageEnglish
Pages (from-to)332-337
Number of pages6
JournalFisheries Research
Volume93
Issue number3
DOIs
StatePublished - Sep 28 2008

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Panulirus argus
molt
lobster
lobsters
molting
experiment
gender
growth curve
coasts
coast

Keywords

  • Assessment
  • Fishery
  • Florida
  • Growth
  • Spiny lobster
  • Tagging

ASJC Scopus subject areas

  • Aquatic Science

Cite this

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title = "Estimating growth of the Florida spiny lobster, Panulirus argus, from molt frequency and size increment data derived from tag and recapture experiments",
abstract = "Molting schedules and growth per molt of Panulirus argus were deduced by gender from size at tag and recapture of 3481 females and 3330 males released off the Florida coast during 1967-2003. Functional relationships were estimated for the intermolt period from premolt carapace length (CL) and for growth increment from premolt and postmolt CL. Starting at 5 mm CL stepwise growth functions were derived by repeatedly applying these two functions in succession. Growth curves were simulated for each sex to 30 years maximum age. At maximum age females reach a CL of 151 mm and males reach 220 mm. Significant slowdown of growth is expressed by an abrupt change in the intermolt period at the onset of maturity, while there is no evidence of a change in slope of the postmolt and premolt functions at that time. The segmented growth characterizations differ very significantly from all of the von Bertalanffy-type functions estimated for the species from indirect ageing procedures.",
keywords = "Assessment, Fishery, Florida, Growth, Spiny lobster, Tagging",
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T1 - Estimating growth of the Florida spiny lobster, Panulirus argus, from molt frequency and size increment data derived from tag and recapture experiments

AU - Ehrhardt, Nelson M

PY - 2008/9/28

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N2 - Molting schedules and growth per molt of Panulirus argus were deduced by gender from size at tag and recapture of 3481 females and 3330 males released off the Florida coast during 1967-2003. Functional relationships were estimated for the intermolt period from premolt carapace length (CL) and for growth increment from premolt and postmolt CL. Starting at 5 mm CL stepwise growth functions were derived by repeatedly applying these two functions in succession. Growth curves were simulated for each sex to 30 years maximum age. At maximum age females reach a CL of 151 mm and males reach 220 mm. Significant slowdown of growth is expressed by an abrupt change in the intermolt period at the onset of maturity, while there is no evidence of a change in slope of the postmolt and premolt functions at that time. The segmented growth characterizations differ very significantly from all of the von Bertalanffy-type functions estimated for the species from indirect ageing procedures.

AB - Molting schedules and growth per molt of Panulirus argus were deduced by gender from size at tag and recapture of 3481 females and 3330 males released off the Florida coast during 1967-2003. Functional relationships were estimated for the intermolt period from premolt carapace length (CL) and for growth increment from premolt and postmolt CL. Starting at 5 mm CL stepwise growth functions were derived by repeatedly applying these two functions in succession. Growth curves were simulated for each sex to 30 years maximum age. At maximum age females reach a CL of 151 mm and males reach 220 mm. Significant slowdown of growth is expressed by an abrupt change in the intermolt period at the onset of maturity, while there is no evidence of a change in slope of the postmolt and premolt functions at that time. The segmented growth characterizations differ very significantly from all of the von Bertalanffy-type functions estimated for the species from indirect ageing procedures.

KW - Assessment

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KW - Florida

KW - Growth

KW - Spiny lobster

KW - Tagging

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