Abstract:ABSTRACT. This study aimed to describe the species composition and abundance of the porcellanid crabs inhabiting the consolidated sublittoral off an island on the southeastern coast of Brazil. During a sampling program at Vitória Island (23º44'S, 45º01'W), collections were carried out monthly from February 2004 through January 2006. The crabs were hand-caught by SCUBA divers during the daytime. The greatest carapace width (CW) was measured, and the sex and developmental stage were identified for each crab. The… Show more
“…The absence of records of these species until the present is likely due to their cryptic habit, as well as to low collection efforts in the rocky subtidal of this region (e.g., Mantelatto et al, 2004aMantelatto et al, , 2004bCobo, 2006;Alves et al, 2011;Alves et al, 2012). However, the possibility remains that these shrimps crossed this biological filter through accidental transport, such as in ballast water, as previously recorded for other species of decapod crustaceans (e.g., Mantelatto & Dias 1999;Alves et al, 2006;Tavares, 2011).…”
Background: The genus Lysmata includes about 40 described species of which at least 12 species occur in the western Atlantic. The present study records the extension of the southern limit of distribution of two species of Lysmata to the coast of São Paulo. Results: A total of 17 and two individual of Lysmata ankeri and Lysmata cf. intermedia were sampled, respectively. Lysmata ankeri were observed inhabiting crevices and natural burrows formed by rocks from 5 to about 15 m depth, while Lysmata cf. intermedia were found living under a large rocky plate from 8 meters depth. Conclusions: These new records improve our knowledge about the geographical distribution of Lysmata ankeri and Lysmata cf. intermedia. The expansion of the geographical distribution of these species may be caused by two different mechanisms of larval dispersal, either natural or anthropogenic.
“…The absence of records of these species until the present is likely due to their cryptic habit, as well as to low collection efforts in the rocky subtidal of this region (e.g., Mantelatto et al, 2004aMantelatto et al, , 2004bCobo, 2006;Alves et al, 2011;Alves et al, 2012). However, the possibility remains that these shrimps crossed this biological filter through accidental transport, such as in ballast water, as previously recorded for other species of decapod crustaceans (e.g., Mantelatto & Dias 1999;Alves et al, 2006;Tavares, 2011).…”
Background: The genus Lysmata includes about 40 described species of which at least 12 species occur in the western Atlantic. The present study records the extension of the southern limit of distribution of two species of Lysmata to the coast of São Paulo. Results: A total of 17 and two individual of Lysmata ankeri and Lysmata cf. intermedia were sampled, respectively. Lysmata ankeri were observed inhabiting crevices and natural burrows formed by rocks from 5 to about 15 m depth, while Lysmata cf. intermedia were found living under a large rocky plate from 8 meters depth. Conclusions: These new records improve our knowledge about the geographical distribution of Lysmata ankeri and Lysmata cf. intermedia. The expansion of the geographical distribution of these species may be caused by two different mechanisms of larval dispersal, either natural or anthropogenic.
“…We recorded 2 anomuran species with new meridional records. The porcellanid, Petrolisthes amoenus had its distribution extended approximately 135 km to the south; the previously southern record was from Victoria island (Alves et al, 2011). The other anomuran with a new meridional record is Dardanus venosus, which was previously recorded up to the Ubatuba region (Mantelatto et al, 2001).…”
Section: Discussionmentioning
confidence: 99%
“…Decapod crustaceans are one of the most representative groups in species diversity and trophic dynamics in marine environments. In different substrates, such as coral, rocky subtidal, and intertidal zones they are especially abundant (Abele, 1974;Alves et al, 2011;Coelho et al, 2008;Randall, 1967;Terossi et al, 2018). The knowledge of decapod biodiversity along the southeastern Brazilian coast has been increased in the past years .…”
This study represents an unprecedented effort to assess the diversity of rocky infralittoral decapod Brachyura and Anomura from the Laje de Santos Marine State Park, a preserved and protected area along the southeastern Brazilian coast. The samples were carried out quarterly for one year, using the combination of artificial refuge substrate for the passive capture of specimens and SCUBA dive for active capture. Specimens sampled were deposited in the Crustacean Collection of the Department of Biology of FFCLRP, University of São Paulo. The abundance and richness is expressive considering the dimension of the area with a total of 987 individuals distributed into 32 species, 22 genera, and 11 families. The hermit crab Pagurus brevidactylus and the crab Mithraculus forceps were the most abundant species of Anomura and Brachyura, respectively. This is the first study focused on carcinofauna inhabiting the park on and we encourage future works focused in the monitoring of species as well as the construction of new robust checklists contents from different offshore regions in order to build biodiversity parameters to serve as baseline for future management and work plans on Brazilian protected areas since decapod crustaceans are key group on fauna composition in any subtidal ecosystem.
“…The collection point on Grande Beach is located in an exposed region in rocky intertidal and on Itaguá Pier is positioned in a protected region with about 3 meters depth. Pachycheles monilifer is abundant in both localities and use these two substrates as shelter or/and food resource (Pinheiro et al, 1997;Micheletti-Flores and NegreirosFransozo, 1999;Alves et al, 2011;2013;Leone and Mantelatto, 2015).…”
-Differences on reproductive performance between two sampling points of the porcelain crab Pachycheles monilifer from Ubatuba (São Paulo, Brazil), one from Itaguá Beach (living on Schizoporella errata) and the other from Grande Beach (living on Phragmatopoma caudata) has been previously observed. Therefore could be expected a specific behavior in substrate preference to optimize the best biogenic habitat. Considering this premise, our goal was to test the substrate preference of this species when both substrates were simultaneously available. In total, 185 individuals were collected in these same localities and they were submitted to substrate selection experiments. The trials were conducted on containers with quiet seawater at 28 ± 1°C and under dark photoperiod. Specimens were exposed to substrates by 30 min. Trials started with the release of one animal per treatment in the middle of the opposite side to the substrate inside the containers. After the established time, the substrate preference of each porcelain crab was verified. As result, no preference pattern was found and the choices in the experiment were not significantly different from the expected. This lack of preferences may be an indication that porcelain crabs are generalists in habitat use regardless of sex of individuals and potential benefit in fitness. Therefore, the differences on the reproductive aspects of the P. monilifer probably are associated with environment factors not simulated in this study and may indicate the occurrence of plasticity in habitat selection behavior.
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