Avoiding disease vs avoiding predation: testing the trade-off in Panulirus argus
Por:
Lozano-Álvarez E., Cid-González L.N., Candia-Zulbarán R.I., Negrete-Soto F., Barradas-Ortiz C., Briones-Fourzán P.
Publicada:
1 jul 2018
Resumen:
Caribbean spiny lobsters, Panulirus argus (Latreille, 1804), usually
avoid sheltering with conspecifics exhibiting the PaV1 viral disease,
yet commonly cohabit with them in large, low-lying artificial shelters
called ``casitas'' that are deployed in shelter-poor habitats in
certain fisheries. We tested two hypotheses proposed to explain this
finding: (A) that in shelter-poor habitats, healthy lobsters make a
trade-off between avoiding disease and avoiding predation; and (B) that
the large size of casitas allows segregation between healthy and
diseased lobsters. We conducted eight experiments in seawater tanks
fitted with two casitas, one empty and one harboring either a healthy or
a diseased tethered lobster (''resident''), or both harboring a
healthy or a diseased resident. We then introduced six healthy,
free-ranging lobsters (FR-lobsters) into each tank (three replicates per
experiment) and recorded their location after approximately 40 hrs.
Experiments were conducted with and without a predatory triggerfish.
Without predators, FR-lobsters used empty casitas and those harboring
healthy residents, but avoided casitas harboring diseased residents,
preferring to remain in the open. With a predator present, FR-lobsters
used empty casitas and those harboring healthy but also diseased
residents, suggesting that disease avoidance depends to some degree on
availability of alternate shelter and immediacy of predation risk. In
larger casitas deployed in a reef lagoon, co-occurrence of wild diseased
and healthy lobsters was relatively high, but the probability of finding
diseased lobsters segregated from healthy lobsters decreased with
increasing number of lobsters. Overall, the results support both
hypotheses, reflecting the complex but flexible behavior of P. argus
under different ecological contexts.
Filiaciones:
Lozano-Álvarez E.:
Universidad Nacionalautónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica de Sistemas Arrecifales, Puerto Morelos, Quintana Roo, Mexico
Cid-González L.N.:
Universidad Nacionalautónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica de Sistemas Arrecifales, Puerto Morelos, Quintana Roo, Mexico
Candia-Zulbarán R.I.:
Universidad Nacionalautónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica de Sistemas Arrecifales, Puerto Morelos, Quintana Roo, Mexico
Negrete-Soto F.:
Universidad Nacionalautónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica de Sistemas Arrecifales, Puerto Morelos, Quintana Roo, Mexico
Barradas-Ortiz C.:
Universidad Nacionalautónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica de Sistemas Arrecifales, Puerto Morelos, Quintana Roo, Mexico
Briones-Fourzán P.:
Universidad Nacionalautónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica de Sistemas Arrecifales, Puerto Morelos, Quintana Roo, Mexico
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