Busca avançada
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Asexual reproduction strategies and blooming potential in Scyphozoa

Texto completo
Autor(es):
Schiariti, Agustin [1, 2] ; Morandini, Andre C. [3] ; Jarms, Gerhard [4, 5] ; Paes, Renato von Glehn [3] ; Franke, Sebastian [4, 5] ; Mianzan, Hermes [1, 2]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Inst Nacl Invest & Desarrollo Pesquero INIDEP, Mar Del Plata, Buenos Aires - Argentina
[2] Univ Nacl Mar del Plata, CONICET, Inst Invest Marinas & Costeras IIMyC, RA-7600 Mar Del Plata - Argentina
[3] Univ Sao Paulo, Inst Biociencias, Dept Zool, BR-05508090 Sao Paulo - Brazil
[4] Univ Hamburg, Bioctr Grindel, D-20146 Hamburg - Germany
[5] Univ Hamburg, Zool Museum, D-20146 Hamburg - Germany
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: Marine Ecology Progress Series; v. 510, p. 241-253, 2014.
Citações Web of Science: 11
Resumo

Scyphistomae show different modes of propagation, occasionally allowing the sudden release of great numbers of medusae through strobilation leading to so-called jellyfish blooms. Accordingly, factors regulating asexual reproduction strategies will control scyphistoma density, which, in turn, may influence blooming potential. We studied 11 scyphistoma species in 6 combinations of temperature and food supply to test the effects of these factors on asexual reproduction strategies and reproduction rates. Temperature and food availability increased reproduction rates for all species and observed reproduction modes. In all cases, starvation was the most important factor constraining the asexual reproduction of scyphistomae. Differences in scyphistoma density were found according to the reproductive strategy adopted by each species. Different Aurelia lineages and Sanderia malayensis presented a multi-mode strategy, developing up to 5 propagation modes. These species reached the highest densities, mostly through lateral budding and stolons. Cassiopea sp., Cephea cephea, Mastigias papua and Phyllorhiza punctata adopted a mono-mode reproductive strategy, developing only free-swimming buds. Lychnorhiza lucerna, Rhizostoma pulmo and Rhopilema esculentum also presented a mono-mode strategy, but they only developed podocysts. These 3 species had the lowest reproduction rates and polyp densities; not only their reproduction rates but also the need for a 2-fold set of environmental stimuli to produce new polyps (one for encystment, another for excystment) made this reproduction mode the slowest of those observed to be utilized for propagation. We conclude that blooms may be defined phylogenetically by the specific asexual modes each species develops, which, in turn, is regulated by environmental conditions. (AU)

Processo FAPESP: 10/50174-7 - Sistemática, ciclo de vida e padrões reprodutivos de medusas (Cnidaria: Medusozoa: Cubozoa e Scyphozoa) na Baixada Santista (São Paulo, Brasil): biodiversidade marinha
Beneficiário:André Carrara Morandini
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Regular
Processo FAPESP: 11/50242-5 - Dimensões da vida marinha: padrões e processos de diversificação em cnidários planctônicos e bentônicos
Beneficiário:Antonio Carlos Marques
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático