A model of zooplankton diel vertical migration off the Canary Islands: implication for active carbon flux

2005 ◽  
Vol 53 (4) ◽  
pp. 213-222 ◽  
Author(s):  
S. Putzeys ◽  
S. Hernández-León
2019 ◽  
Vol 86 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Airam Guerra-Marrero ◽  
Vicente Hernández-García ◽  
Airam Sarmiento-Lezcano ◽  
David Jiménez-Alvarado ◽  
Angelo Santana-del Pino ◽  
...  

Abstract Abralia veranyi and Abraliopsis morisii were the most abundant cephalopods caught during epipelagic and mesopelagic surveys off the Canary Islands and accounted for 26% and 35% of the cephalopod catch, respectively. Diel vertical migration patterns were observed in both species. At night, A. veranyi was recorded at depths as shallow as 38–90 m, whereas Abraliopsis morisii occurred at depths of 98–219 m. As individuals grow in mantle length, their diet changes substantially. Abraliopsis morisii showed ontogenetic shifts at 22.9 mm and 35.3 mm dorsal mantle length (DML), while A. veranyi showed ontogenetic shifts at 20.5 mm and 30.9 mm DML. Prior to the first ontogenic shift, both species fed mainly on copepods and mysids. After this shift they fed on larger prey, such as decapods and fish; the diets of larger individuals also contained cephalopods.


Author(s):  
Ruping Ge ◽  
Hongju Chen ◽  
Guangxing Liu ◽  
Yanzhong Zhu ◽  
Qiang Jiang

2002 ◽  
Vol 46 ◽  
pp. 1061-1066 ◽  
Author(s):  
Youichi TAKEMOTO ◽  
Katsuhiro FURUMOTO ◽  
Akihide TADA

2015 ◽  
Vol 34 (5) ◽  
pp. 68-74 ◽  
Author(s):  
Huiwu Wang ◽  
Hongxia Chen ◽  
Liang Xue ◽  
Na Liu ◽  
Yanliang Liu

1996 ◽  
Vol 41 (2) ◽  
pp. 224-233 ◽  
Author(s):  
Craig E. Williamson ◽  
Robert W. Sanders ◽  
Robert E. Moeller ◽  
Paul L.> Stutzman

Author(s):  
Emma Bloomfield

Invasive predators are a large and growing threat to species diversity and human well-being. One of the reasons invasive predators have a negative impact is that native prey species do not possess appropriate anti-predator defenses. However, rapid evolution may allow prey species to respond adaptively to introduced predators. When this occurs the impacts of invasive predators are mitigated. An invasive predator that is of concern in North America is the spiny water flea, Bythotrephes longimanus. It disrupts freshwater ecosystems through voracious consumption of zooplankton. Declines in zooplankton abundance and richness reduce water quality and recreational fishing opportunities. However, a species of zooplankton, Daphnia mendotae has been found to adaptively respond to B. longimanus. This adaptation is diel vertical migration, the behavioral change of occupying a lower position in the water column during the day to reduce predation risk. Despite the ecological and economic implications of this behavior in response to B. longimanus, it has only been studied in a few lakes. This study investigated adaptive diel vertical migration in D. mendotae from multiple lakes. This was done by measuring the vertical position of D. mendotae in artificial water columns. It was hypothesized that D. mendotae from lakes that have been invaded by B. longimanus will exhibit diel vertical migration in the presence of B. longimanus. If this hypothesis is supported, rapid evolution of diel vertical migration can be established as a widespread response. This would strengthen understanding of rapid evolution and allow lakes more vulnerable to B.longimanus to be identified.


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