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(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.)

Comparative reproductive biology of two southwestern Atlantic populations of the hermit crab Pagurus exilis (Crustacea: Anomura: Paguridae)

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Autor(es):
Terossi, Mariana [1, 2] ; Torati, Lucas S. [1, 2] ; Miranda, Ivana [1, 2] ; Scelzo, Marcelo A. [3] ; Mantelatto, Fernando L. [1, 2]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Lab Bioecol & Crustacean Systemat, Dept Biol, Fac Philosophy Sci & Letters Ribeirao Preto FFCLR, BR-14040901 Ribeirao Preto, SP - Brazil
[2] Univ Sao Paulo, Postgrad Program Comparat Biol, Dept Biol, Fac Philosophy Sci & Letters Ribeirao Preto FFCLR, BR-14040901 Ribeirao Preto, SP - Brazil
[3] Univ Nacl Mar del Plata, CONICET, Dept Ciencias Marinas, Fac Ciencias Exactas & Nat, Mar Del Plata, Buenos Aires - Argentina
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: MARINE ECOLOGY-AN EVOLUTIONARY PERSPECTIVE; v. 31, n. 4, p. 584-591, DEC 2010.
Citações Web of Science: 19
Resumo

Pagurus exilis (Benedict, 1892) is an endemic South Atlantic hermit crab with a distribution ranging from Rio de Janeiro State, Brazil, to Buenos Aires Province, Argentina. The present study analyzed the reproduction of two populations at the extremes of this geographical distribution, and compared their reproductive period, fecundity, and changes in egg size and egg volume during the incubation period in order to assess the variability over this latitudinal range. Hermit crabs were collected monthly over a 2-year period. In total, 108 females were analyzed for Brazil (44 non-ovigerous and 64 ovigerous), and 141 for Argentina (87 non-ovigerous and 54 ovigerous). Reproduction in Brazil occurs year-round, with peaks in the fall and winter seasons; in Argentina reproduction occurs only in spring and summer. The Brazilian ovigerous females were significantly larger than the Argentina ones (Brazil: SL = 5.33 +/- 1.45 mm; Argentina: SL = 4.15 +/- 0.52 mm; P < 0.001). The fecundity was 1447 +/- 831 eggs (317 to 2885) in Brazil and 987 +/- 711 eggs (114 to 2665) in Argentina, with a trend towards higher fecundity in Brazil. Eggs in the Argentina population were larger than those in Brazil for all the three stages investigated, and no changes in egg volume were found during egg development for both populations. The reproductive traits of the two populations showed some important differences, which may reflect adaptations to local environmental conditions, demonstrating a high plasticity of reproductive features of the species in Brazilian and Argentine waters. The strategy adopted by the Argentina population involves a lower production of larger eggs compared to the population in Brazil; this lower production is associated with reproduction in cold-water regions. (AU)

Processo FAPESP: 07/51018-6 - Revisão taxonômica das espécies brasileiras de Potimirim Holthuis,1954 e filogenia do grupo baseado em dados moleculares
Beneficiário:Lucas Simon Torati
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 06/61771-0 - Status taxonômico e biológico de duas espécies do gênero Hippolyte Leach, 1814 (Decapoda: Hippolytidae) no Atlântico americano
Beneficiário:Mariana Terossi Rodrigues Mariano
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 98/07090-3 - Biodiversidade marinha bêntica no Estado de São Paulo
Beneficiário:Antonia Cecília Zacagnini Amaral
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático