Evolution of the limpet Patella candei d’Orbigny (Mollusca, Patellidae) in Atlantic archipelagos: human intervention and natural processes

Weber, Laura; Hawkins, Stephen J.

doi:10.1046/j.1095-8312.2002.00102.x

Cited by 42 publications

(48 citation statements)

References 29 publications

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“…Generation of robust morphological data is particularly relevant to the taxonomy of P. candei for which early morphological patterns prompted the description of four geographically distinct subspecies (P. c. gomesi in Azores; P. c. ordinaria in Madeira, P. c. candei in Selvagens, and P. c. crenata in Canaries (Christiaens, 1973). However, subsequent studies have disagreed with various aspects of this taxonomy and it remains controversial (Côrte-Real et al, 1996a,b;Weber and Hawkins, 2002;Sá-Pinto et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Congruent Molecular and Morphological Diversity of Macaronesian Limpets: Insights into eco-evolutionary Forces and Tools for Conservation

Carreira¹,

Shaw

Gonçalves

et al. 2017

Front. Mar. Sci.

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Combined analysis of genetic and morphological variation can provide synergistic insights into eco-evolutionary forces shaping biodiversity, as well as tools for conservation and management. Macaronesian limpets are undergoing severe declines due to overexploitation which calls for an evaluation of the evolutionary significance and taxonomic status of populations. This study details the analysis of genetic (mtDNA sequencing) and morphological (geometric analysis of shell shape) variation among Macaronesian populations of Patella aspera, P. rustica, and P. candei. In the case of P. aspera and P. rustica, this also included analysis of mainland conspecifics. mtDNA revealed distinct phylogeographic patterns for the three species. For both P. aspera and P. rustica Macaronesian and continental samples were reciprocally monophyletic, with shallower, and distinct, phylogeographic structure within both clades. For P. candei, the Macaronesian endemic, three reciprocally monophyletic groups corresponding to (i) the Azores, (ii) Madeira and (iii) Selvagens and Canary Islands were resolved. The different patterns for each species are compatible with independent processes of colonization and demographic processes. Morphological differentiation matched the major phylogeographic groupings (i.e., Macaronesian v Continent for P. aspera and P. rustica; Azores/Madeira/Selvagens and Canary Islands for P. candei) compatible with such variation being shaped by genetic drift associated with distinct demographic histories of lineages as well as historical/recurrent selection pressures. The genetic/morphological congruence supports the formal recognition of at least three described P. candei subspecies. Moreover, the data prompt recommendation of the separate management of limpets from each archipelago. At present management efforts are hampered by illegal harvesting of limpets. From an applied viewpoint, this study confirms that morphology retains useful information on genetic status and thus represents a potentially cheap method applicable to limpet conservation.

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Section: Introductionmentioning

confidence: 99%

Congruent Molecular and Morphological Diversity of Macaronesian Limpets: Insights into eco-evolutionary Forces and Tools for Conservation

Carreira¹,

Shaw

Gonçalves

et al. 2017

Front. Mar. Sci.

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“…Among patellids, which have been subject to genetic investigation, a geographical divergence has also been recognized between archipelagoes but has been given taxonomic recognition at the subspecific rather than the specific level (Coˆrte-Real, Hawkins & Thorpe, 1996a,b;Weber & Hawkins, 2002). Whether the differentiation here recorded in insular Clelandella actually deserves specific status (i.e.…”

Section: Discussionmentioning

confidence: 90%

Geographical Differentiation In Clelandella (Gastropoda: Trochidae) In The Northeastern Atlantic

Gofas¹

2005

Journal of Molluscan Studies

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The trochid genus Clelandella is reviewed, taking into account new material collected on northeastern Atlantic seamounts and archipelagos, and in deep water of the Mediterranean. The type species C. miliaris (Brocchi, 1814) is illustrated with topotypic material, and living representatives are reported ranging from north Norway to West Africa and into the Mediterranean. The insular populations of Clelandella are found to constitute discrete groups, which are treated as new species: Clelandella dautzenbergi n. sp. on the Lusitanian seamounts, C. perforata n. sp. in the Meteor group of the central North Atlantic, C. azorica n. sp. in the Azores and C. madeirensis n. sp. in Madeira. Within such groups, differentiation is not appreciable and variability is continuous notwithstanding distances of the order of 200 km. Between such groups, the geographical isolation of the insular populations has resulted in substantial divergence over distances in the range 300-600 km. A further species, C. myriamae n. sp., was collected on deep-water mud volcanoes of the eastern Mediterranean, and is broadly sympatric with C. miliaris.

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“…The subspecies P. candei gomesii is endemic to the Azores (Titselaar, 1998;Weber and Hawkins, 2002), occurring subtidally and in mid and high shores, especially on boulders (Côrte-Real et al, 1996;Hawkins, et al 2000). Within the Azorean archipelago, this subspecies is morphologically plastic occurring as two habitat morphs: the "smooth limpet" and the "fly limpet".…”

Section: Introductionmentioning

confidence: 99%

The reproductive cycle ofPatella candei gomesiiDrouët, 1858 (Mollusca: Patellogastropoda), an Azorean endemic subspecies

Cúrdia¹,

Rodrigues

Martins

et al. 2005

Invertebrate Reproduction & Development

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SummaryPatella candei gomesii is morphologically plastic comprising two ecomorphs. The "smooth limpet" is characteristic of the eulittoral zone, whereas the "fly limpet" is mainly found higher in the shore, on the splash zone of exposed areas. Their reproductive strategies are poorly understood. This study investigated the reproductive cycles of the ecomorphs using histological techniques. The annual cycles were found to be similar. Both sexes exhibited synchronous patterns and were mature most of the year. In April, significant increases were observed in the relative volume occupied by previtellogenic and vitellogenic cells in females, and by spermatogonia, spermatids and spermatocytes in males. The maximum values for mature oocytes and spermatozoa were observed in July. It is concluded that the breeding season of P. candei gomesii lasts the whole year peaking in the summer (when reproductive condition is highest and the main spawning event must occur). The implications of these findings for the taxonomy and conservation of the subspecies are further discussed.

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Evolution of the limpet Patella candei d’Orbigny (Mollusca, Patellidae) in Atlantic archipelagos: human intervention and natural processes

Cited by 42 publications

References 29 publications

Congruent Molecular and Morphological Diversity of Macaronesian Limpets: Insights into eco-evolutionary Forces and Tools for Conservation

Congruent Molecular and Morphological Diversity of Macaronesian Limpets: Insights into eco-evolutionary Forces and Tools for Conservation

Geographical Differentiation In Clelandella (Gastropoda: Trochidae) In The Northeastern Atlantic

The reproductive cycle ofPatella candei gomesiiDrouët, 1858 (Mollusca: Patellogastropoda), an Azorean endemic subspecies

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