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Connectivity patterns of anchovy larvae in the Bay of Biscay from a coupled transport-bioenergetic model forced by size-structured zooplankton ArchiMer
Huret, Martin; Vandromme, Pieter; Petitgas, Pierre; Pecquerie, Laure.
Connectivity during early life stages of pelagic fish, defined here by survival probability between spawning and early juvenile habitats, depends on a combination of sufficient food availability and low predator encounter along drift trajectories. For anchovy in the Bay of Biscay, larval transport experiments throughout the spawning season suggest accumulation of early juveniles in the offshore area of the southern Bay, as well as retention over the mid-shelf at mid-latitude. However, late summer-early autumn surveys suggest presence of juveniles only in the former region. From this observation, we set up a bioenergetic individual based model to test for the effect of food availability on survival patterns. The model couples a Lagrangian transport module...
Tipo: Text Palavras-chave: Connectivity; Larval IBM; Bioenergetics; Zooplankton; Bay of Biscay; European anchovy.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00105/21655/19237.pdf
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Decadal evolution of ligurian sea zooplankton linked to environmental fluctuations. From imaging systems to size-based models ArchiMer
Vandromme, Pieter.
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Ano: 2010 URL: http://archimer.ifremer.fr/doc/00070/18172/15731.pdf
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Symbolic Analysis of Plankton Swimming Trajectories: Case Study of Strobilidium sp. (Protista) Helical Walking under Various Food Conditions ArchiMer
Vandromme, Pieter; Schmitt, François G.; Souissi, Sami; Buskey, Edward J.; Strickler, J. Rudi; Wu, Cheng-han; Hwang, Jiang-shiou.
The swimming behavior of the ciliate Strobilidium sp. was recorded using cinematographic techniques. A density of 20 ciliates/ml was used under 4 experimental food conditions: 121, 625, 3025, and 15,125 cells/ml of the dinoflagellate Gymnodinium sp. In total, 100 trajectories per experiment were recorded and analyzed. We classified this ciliate’s swimming trajectories into categories we called “helix”, “non-helix”, and “break”. These swimming states were identified using automated recognition of helices, based on values of swimming trajectory angles. We performed a symbolic analysis of the succession of swimming states which enabled discrimination between food concentration experiments, and provided a more-complete characterization of the swimming...
Tipo: Text Palavras-chave: Protista; Plankton behavior; Swimming states; Symbolic dynamics; Simulation.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00070/18171/15730.pdf
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