Risk factors associated with soft-shelled lobsters (Homarus americanus) in southwestern Nova Scotia, Canada

Krishna K. Thakur, Crawford Revie, Henrik Stryhn, Shannon Scott Tibbetts, Jean Lavallée, Raphaël Vanderstichel

Research output: Contribution to journalArticle

Abstract

Soft-shelled lobsters pose economic challenges to the lobster industry due to low meat yields and survivability during holding and transportation. Our objectives were to describe spatio-temporal patterns of soft-shelled lobsters in southwestern Nova Scotia, and identify environmental and lobster-related factors associated with shell quality. We analyzed data obtained from a broad-scale, intensive monitoring project and remotely sensed water temperatures. Mixed-effect logistic regression and linear regression methods analyzed more than 130 000 samples collected between 2004 and 2014. The annual overall prevalence of soft-shelled lobsters ranged from 9% to 38% and varied significantly among fishing areas. Shell quality was influenced by sex and size, and in the 2 months before the fishing season, lower water temperatures (4–6 weeks prior to sampling) were associated with reduced prevalence of soft-shells. High annual variability of soft-shell prevalence, that water temperature alone could not explain, suggests that adjusting fishing seasons, arbitrarily, in two fishing areas will not improve the overall shell quality of landed lobsters. Further research is needed to evaluate the effects of long-term temperature and ecosystem changes on lobster health in eastern Canada.
LanguageEnglish
Pages15-33
Number of pages19
JournalFACETS
Volume2
Issue number1
DOIs
Publication statusPublished - 18 Jan 2017

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Nephropidae
Nova Scotia
Homarus americanus
lobsters
Canada
risk factors
Temperature
Water
water temperature
Meat
Ecosystem
Linear Models
Industry
Logistic Models
Economics
Health
long term effects
Research
meat
industry

Keywords

  • Atlantic lobster
  • soft shells
  • risk factors
  • spatio-temporal
  • remote sensing
  • sea surface temperature

Cite this

Thakur, Krishna K. ; Revie, Crawford ; Stryhn, Henrik ; Tibbetts, Shannon Scott ; Lavallée, Jean ; Vanderstichel, Raphaël. / Risk factors associated with soft-shelled lobsters (Homarus americanus) in southwestern Nova Scotia, Canada. In: FACETS. 2017 ; Vol. 2, No. 1. pp. 15-33.
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Risk factors associated with soft-shelled lobsters (Homarus americanus) in southwestern Nova Scotia, Canada. / Thakur, Krishna K.; Revie, Crawford; Stryhn, Henrik; Tibbetts, Shannon Scott; Lavallée, Jean; Vanderstichel, Raphaël.

In: FACETS, Vol. 2, No. 1, 18.01.2017, p. 15-33.

Research output: Contribution to journalArticle

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