Age,growth and mortality in the giant snail Adelomelon beckii (Broderip 1836) on the Argentinean shelf     

Florencia Arrighetti  Thomas Brey  Andreas Mackensen  Pablo E. Penchaszadeh 《Journal of Sea Research》2011,65(2):219-223

The marine subtidal volutid snail Adelomelon beckii was studied in order to obtain their population dynamics, particularly on growth, age, mortality and production. Stable oxygen isotope ratios confirmed semiannual formation of internal growth marks. A von Bertalanffy growth model fitted 308 size-at-age data pairs. A. beckii potential lifespan in Mar del Plata (Argentina) region is 29 years, being rather long lived compared to other large gastropods. Total mortality Z and natural mortality M were calculated to be 0.210 y^?1 and 0.081 y^?1 respectively. Fishing mortality F amounts to 0.129 y^?1 corresponding to an exploitation rate E of 0.614, a value much beyond the optimum rate of 0.427. The current exploitation regime will be unsustainable in the long run unless a proper management approach establishes.  相似文献   

On the efficiency and effectiveness of automatic deep drainage systems during an extreme rainfall event: the Mendatica landslide case study (western Liguria,Italy)     

Pepe  Giacomo  Cevasco  Andrea  Piazza  Michele  Macciò  Roberto  Arrighetti  Fabio  Casagli  Nicola 《Landslides》2021,18(12):3799-3820

Landslides - This study presents the employment of automatic deep drainage systems to stabilize the Mendatica landslide, one of the largest relict landslides of western Liguria (north-western...  相似文献