Distribution of decapod larvae in the surface layer of an isolated equatorial oceanic archipelago: the cases of benthic Grapsus grapsus (Brachyura: Grapsidae) and pelagic Sergestes edwardsi (Dendrobranchiata: Sergestidae)

Autor(es)

Brandao, Manoela Costa ^[1] ; Koettker, Andrea Green ^[2] ; Freire, Andrea Santarosa ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Santa Catarina, Dept Ecol & Zool, BR-88010970 Florianopolis, SC - Brazil

^[2] Univ Sao Paulo, Inst Oceanog, BR-05508120 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: HELGOLAND MARINE RESEARCH; v. 67, n. 1, p. 155-165, MAR 2013.
• Citações Web of Science: 6

Resumo

Two different decapod larval assemblages inhabit the marine environment of Saint Paul's Rocks, differentiating the inlet from the surrounding oceanic waters. Larvae of the crab Grapsus grapsus and of the holopelagic shrimp Sergestes edwardsi are abundant in superficial waters of the archipelago and have previously been shown to be good indicators of the inlet and adjacent oceanic waters, respectively. We investigated the horizontal, diel and temporal distribution of these species at Saint Paul's Rocks. Horizontal surface hauls were conducted from 2003 to 2005, in the inlet and at four increasing distances from the archipelago, in the morning and at night, using a 200-mu m mesh net. Larvae of G. grapsus were identified in samples from all expeditions and abundance was found significantly higher at night in the inlet site. Only larvae in the first zoeal stage were found in samples, highlighting the importance of the area for this species reproduction. On the contrary, the distribution of larvae of S. edwardsi was typical of a holopelagic species, which are permanent residents of the water column and spawn in oceanic areas, indicating that the islands are of little influence to them. (AU)

• Processo FAPESP: 05/58085-5 - Composição, densidade e variação espaço-temporal de larvas de decápodes e estomatópodes do arquipélago de São Pedro e São Paulo, Brasil
• Beneficiário: Andréa Green Koettker
• Linha de fomento: Bolsas no Brasil - Mestrado