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  1. Artikel: Never forget where you came from: Microhabitat of origin influences boldness and exploration in the hermit crab Clibanarius symmetricus (Diogenidae)

    Garcia, Frederico Alekhine Chaves / Moura, Rafael Rios / Ogawa, Cynthia Yuri / Zanette, Lorenzo Roberto Sgobaro / Silva, José Roberto Feitosa / Rezende, Carla Ferreira

    Journal of experimental marine biology and ecology. 2020 June, v. 527

    2020  

    Abstract: Behavioral traits can differ between individuals in a population and affect their fitness if they differentially influence survivorship in a microhabitat scale. This may occur when individuals experience different predation risks between microhabitats. ... ...

    Abstract Behavioral traits can differ between individuals in a population and affect their fitness if they differentially influence survivorship in a microhabitat scale. This may occur when individuals experience different predation risks between microhabitats. In this study, we investigated boldness, exploration, and their correlation depending on the microhabitat of origin in the hermit crab Clibanarius symmetricus. Individuals of both sexes were collected from four microhabitats with different levels of predation exposure within the intertidal zone of a mangrove. We conducted experiments introducing the hermit crabs to a new standard environment and simulated predation attempts to assess exploration and boldness. Latency to re-emerge from the shell (boldness) was consistent and not affected by size, sex, or microhabitat type, but was slightly different between years. Exploration, in turn, varied only according to the microhabitat from which individuals were collected. Hermit crabs from the less risky environments explored the experimental arena for longer than individuals from the microhabitat most exposed to predators. This behavioral consistency in exploration activity can influence microhabitat choice in C. symmetricus. In addition, boldness and exploration were weakly correlated in a behavioral syndrome. Therefore, predation exposure can be a source of variation in exploration-avoidance personalities and can indirectly influence the expression of boldness in C. symmetricus. We conclude that personality traits can coevolve and have implications for habitat choice, but traditional theories of individual behavioral consistency still lack a unified theoretical background linking animal personality to niche specialization with empirical support.
    Schlagwörter Clibanarius ; animals ; littoral zone ; microhabitats ; personality ; predation ; survival rate
    Sprache Englisch
    Erscheinungsverlauf 2020-06
    Erscheinungsort Elsevier B.V.
    Dokumenttyp Artikel
    Anmerkung NAL-AP-2-clean
    ZDB-ID 410283-6
    ISSN 0022-0981
    ISSN 0022-0981
    DOI 10.1016/j.jembe.2020.151365
    Datenquelle NAL Katalog (AGRICOLA)

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  2. Artikel ; Online: Does food partitioning vary in leaf-eating crabs in response to source quality?

    Pereira, Tamara Maciel / Nóbrega, Gabriel Nuto / Ferreira, Tiago Osório / Ogawa, Cynthia Yuri / de Camargo, Plínio Barbosa / Feitosa Silva, José Roberto / Rezende, Carla Ferreira

    Marine environmental research

    2018  Band 144, Seite(n) 72–83

    Abstract: Mangroves have a relevant ecosystem function due to their efficiency in blue carbon sequestration. Autotrophic carbon conservation in mangroves remains controversial. In this sense, autotrophic nutrient assimilation by crabs can highlight their ecosystem ...

    Abstract Mangroves have a relevant ecosystem function due to their efficiency in blue carbon sequestration. Autotrophic carbon conservation in mangroves remains controversial. In this sense, autotrophic nutrient assimilation by crabs can highlight their ecosystem function. This study aims to identify the relationship between quality sources and food partitioning in two leaf-eating crabs, Ucides cordatus and Goniopsis cruentata. Quantification of the litterfall biomass, analysis of the soil, the C/N ratio and stable isotopes (δ
    Mesh-Begriff(e) Animals ; Avicennia ; Brachyura ; Brazil ; Carbon Isotopes/analysis ; Food Chain ; Invertebrates ; Nitrogen Isotopes/analysis ; Plant Leaves ; Rhizophoraceae ; Rivers ; Wetlands
    Chemische Substanzen Carbon Isotopes ; Nitrogen Isotopes
    Sprache Englisch
    Erscheinungsdatum 2018-12-24
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 1502505-6
    ISSN 1879-0291 ; 0141-1136
    ISSN (online) 1879-0291
    ISSN 0141-1136
    DOI 10.1016/j.marenvres.2018.12.005
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: Species Composition, Reproduction, and Body Size of Mud Crabs, Scylla spp., Caught in Urado Bay, Japan

    Ogawa, Cynthia Yuri / Hamasaki, Katsuyuki / Dan, Shigeki / Obata, Yasuhiro / Kitada, Shuichi

    Journal of crustacean biology

    Band v. 32,, Heft no. 5

    Abstract: Species composition, reproduction and body size of mud crabs, genus Scylla de Haan, 1833, were investigated using gill nets from October 2008 to October 2009 in Urado Bay, Japan. Three mud crab species were identified in the area, with S. paramamosain ... ...

    Abstract Species composition, reproduction and body size of mud crabs, genus Scylla de Haan, 1833, were investigated using gill nets from October 2008 to October 2009 in Urado Bay, Japan. Three mud crab species were identified in the area, with S. paramamosain Estampador, 1949 being the dominant species (74% of the catch), followed by S. serrata (Forskål, 1775) (23%) and S. olivacea (Herbst, 1796) (3%). We found temporal changes in species composition with abundances of S. serrata increasing towards the summer season. Ovigerous females of S. paramamosain and S. olivacea occur between January and October, peaking in the warm (May-July) and rainy (June-July) seasons, but we found no berried females of S. serrata. The female-biased sex ratios of S. paramamosain and S. serrata, and the larger body size of females during the period from autumn (November) to early spring (April), suggest that large gravid females may have migrated offshore before the spawning season. The mean body size of females and males of S. paramamosain and S. serrata tended to increase and the mating activity was high between May and October, showing the moulting and growth season.
    Schlagwörter gillnets ; gravid females ; males ; body size ; sex ratio ; reproduction ; spawning ; spring ; temporal variation ; autumn ; summer ; Scylla ; molting ; crabs ; species diversity
    Sprache Englisch
    Dokumenttyp Artikel
    ISSN 0278-0372
    Datenquelle AGRIS - International Information System for the Agricultural Sciences and Technology

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