Lifetime reproductive potential of female blue crabs Callinectes sapidus in North Carolina, USA

Published

Journal Article

We examined lifetime clutch production and size at maturity for blue crabs Callinectes sapidus Rathbun in North Carolina, USA. Female crabs were collected at terminal molt and confined individually in the field for the duration of their lifetime. Crabs were monitored weekly for the presence of eggs. Clutch quality and larval viability were assessed for each clutch. Crabs produced up to 7 clutches over 1 to 2 spawning seasons and survived up to 394 d after the terminal molt. Time to first clutch and time between clutches were positively correlated with carapace width and best described by degree-days, physiological time calculated as a thermal integral. Size at maturity was negatively correlated with water temperature on the day of the terminal molt. Egg lipid content (mean = 79.2 % of dry mass), egg diameter (mean = 267.5 um), larval carapace width (mean = 278.4 um), and larval survival time without food (mean = 3.4 d) were similar for all clutches. The percentage of embryos developing normally decreased 40% from Clutch 1 to 4, and clutch volume decreased 50% from Clutch 1 to 5. Thus, most of a crab's reproductive output is from the first few clutches. Realistic estimates of fecundity and reproductive potential are essential for accurate spawning stock assessment and population modeling. © Inter-Research 2009.

Full Text

Duke Authors

Cited Authors

  • Darnell, MZ; Rittschof, D; Darnell, KM; McDowell, RE

Published Date

  • December 17, 2009

Published In

Volume / Issue

  • 394 /

Start / End Page

  • 153 - 163

International Standard Serial Number (ISSN)

  • 0171-8630

Digital Object Identifier (DOI)

  • 10.3354/meps08295

Citation Source

  • Scopus