Skip to main content

Free Content Ontogenetic Changes in Natural Mortality Rate of Queen Conch, Strombus Gigas (Mollusca: Mesogastropoda)

Download Article:
(PDF 476.2 kb)


The relationship between instantaneous rate of natural mortality (M) and age (t) in queen conchs was modeled using a Weibull hazard function. Data were obtained from the literature. The resulting relationship,

M = 4.001t0.0774–1,

was highly significant, accounting for over 90% of the variability in the data. The model predicts that mortality rate decreases substantially with age until the onset of sexual maturity. Some implications of the model on assessments in fisheries and mariculture are as follows: (1) in yield-per-recruit analyses, models that allow for variable mortality are preferable, and results of previous analyses are questionable; (2) predictions of mortality for unprotected juveniles can be made and used to design and assess possible mariculture grow-out strategies; and, as an example of the latter, (3) the high rates of mortality noted in field-release experiments using laboratory-reared juveniles are consistent with the model, thus confirming that those release methodologies do not represent viable grow-out strategies.

Document Type: Research Article

Publication date: March 1, 1988

More about this publication?
  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more