Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Is there host-associated differentiation in marine herbivorous amphipods?

Full text
Author(s):
Peres, Pedro A. [1, 2] ; Azevedo-Silva, Marianne [1] ; Andrade, Sonia C. S. [3] ; Leite, Fosca P. P. [1]
Total Authors: 4
Affiliation:
[1] Univ Campinas UNICAMP, Inst Biol, Dept Anim Biol, Campinas, SP - Brazil
[2] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto FFCLR, Dept Biol, Ave Bandeirantes 3900, BR-14040901 Ribeirao Preto - Brazil
[3] Univ Sao Paulo, Inst Biosci, Dept Genet & Evolutionary Biol, Ribeirao Preto - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Biological Journal of the Linnean Society; v. 126, n. 4, p. 885-898, APR 2019.
Web of Science Citations: 0
Abstract

Plant-herbivore interactions play an important role in the evolution of small terrestrial and marine herbivores. Some authors consider marine herbivorous amphipods to be ecologically equivalent to terrestrial insects, in that both are small relative to larger host plants, and host choices are often chemically mediated. Different host species provide distinct selective pressures for their associated animal populations, which may act as divergent selection pressure towards adaptive traits related to each host. This phenomenon, termed host-associated differentiation (HAD), has been documented in insects, and can lead to local adaptation, or even ecological speciation. However, whether HAD occurs within marine amphipod species remains unexplored. Here, Cymadusa filosa (Amphipoda, Ampithoidae) and its host macroalgae were used as models to test whether amphipods from different host macroalgae are genetically or morphologically differentiated. Furthermore, we tested for differentiation among geographically separated populations resulting from dispersal limitation. Ten microsatellite loci were used to assess genetic diversity, along with geometric morphometric analyses for morphology. The results indicate that there was no HAD with regard to genetic and morphological features. Individuals seem to be highly mobile on local scales or to disperse as juveniles, and they seem capable of dispering among sites. Two distinct morphological groups were formed, probably related to the environmental conditions at those sites. HAD in marine environments is probably context-dependent, and should be explored for different species and scales to better appraise marine plant-herbivore interactions. (AU)

FAPESP's process: 14/23141-1 - Ecology of interactions, behavioral ecology, and genetics of neotropical ant populations
Grantee:Paulo Sergio Moreira Carvalho de Oliveira
Support Opportunities: BIOTA-FAPESP Program - Regular Research Grants
FAPESP's process: 14/15614-7 - Herbivorous amphipods and algae interactions: does the identity of the host algae influences on the populations genetic structure?
Grantee:Pedro Augusto da Silva Peres
Support Opportunities: Scholarships in Brazil - Master