Project 3289: E. Sampaio, J. P. Barreiros, R. Rosa. 2018. A potential new endemism: speciation of the common octopus Octopus vulgaris in the Desertas Islands, Cabo Verde?. Zoologia Caboverdiana. 2 (7):39-47.
Specimen: Octopus vulgaris (University of Cabo Verde/UCV 2019/00011:OCTOCVD3)
View: all animal

Abstract

Cabo Verde is a unique biogeographical region, whereby mixing temperate and tropical characteristics an unusually high number of endemic species are reported. Cephalopods are central pieces of trophic networks worldwide, interacting as predator/ prey and competing with fish for ecological niches. We aimed to assess how the topography, prey availability, and predatory pressure of the Desertas Islands shaped the behaviour and ecology of the existing Octopus vulgaris population. Visual census (both underwater and on tidal rock pools) were performed on Santa Luzia Island (20 days) and Raso Islet (eight days). Octopus vulgaris individuals were found only in intertidal areas, during low tide, and mean population morphometry averaged 35.6 ± 10.4 cm (total length) and 175.0 ± 53 g (wet weight). The markedly reduced size of O. vulgaris, only partly explainable by Bergmann’s rule, and exclusion from subtidal areas, appears to have been mainly driven by severe predatory pressure and strong inter-specific competition for limited habitat niches. The induced behavioural and morphometric alterations may be the product of developmental plasticity, or have arisen from deeper genetic alterations, which would portray a potential speciation phenomenon of octopus’ populations residing on Cabo Verde’s Desertas Islands.


Read the article »

Project DOI: 10.7934/P3289, http://dx.doi.org/10.7934/P3289
This project contains
  • 34 Media
  • 1 Taxon
  • 6 Specimens
Total size of project's media files: 52.72M

Download Project SDD File
Currently Viewing:
MorphoBank Project 3289
  • Creation Date:
    22 October 2018
  • Publication Date:
    28 December 2018
  • Project views: 7421

    Authors' Institutions

    • Universidade de Lisboa

    • Universidade dos Açores



    Members

    member name taxa specimens media
    Eduardo Sampaio
    Project Administrator
    1633


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views7421
    Project overview655
    Bibliography241
    Media views4629Media search (1089 views); M646224 (163 views); M683467 (104 views); M683468 (98 views); M683469 (103 views); M683470 (110 views); M683471 (99 views); M683472 (103 views); M683473 (103 views); M683474 (111 views); M683475 (98 views); M683476 (104 views); M683477 (105 views); M683478 (106 views); M683479 (99 views); M683480 (95 views); M683481 (99 views); M683482 (96 views); M683483 (104 views); M683484 (101 views); M683485 (99 views); M683486 (98 views); M683487 (108 views); M683488 (101 views); M683489 (99 views); M683490 (103 views); M683491 (95 views); M683492 (112 views); M683493 (104 views); M683494 (101 views); M683495 (107 views); M683496 (108 views); M683497 (102 views); M683498 (99 views); M683499 (103 views);
    Views for media list322
    Specimen list1197
    Taxon list376
    Documents list1




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project90
    Project downloads90