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Navegando por Autor "PIRES, Marcus Alexandre Borges"

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    Early larval development in the laboratory of Alpheus estuariensis (Crustacea: Caridea) from the Amazon Region
    (2008-06) PIRES, Marcus Alexandre Borges; ABRUNHOSA, Fernando Araujo; MACIEL, Cristiana Ramalho
    Here we describe and illustrate in detail four early zoeal stages of Alpheus estuariensis Christoffersen, 1984 from larvae reared in the laboratory. Two ovigerous females were collected in the tidal creek of the Bragança estuary, state of Pará, northeastern Brazil. After hatching, the larvae were placed in small containers (with 10 larvae in each). Females were deposited in the Museu Paraense Emilio Goeldi (MPEG 0803) and the larvae of each larval stage in the Zoological Museum of São Paulo University (MUSP18452). Ten larvae and exuviae were dissected with fine needles under an ocular microscope. Morphological comparisons with previous studies on larval development of the Alpheus species are briefly discussed.
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    Larval development of Lepidophthalmus siriboia Felder & Rodrigues, 1993 (Decapoda: Thalassinidea) from the Amazon region, reared in the laboratory
    (Instituto Nacional de Pesquisas da Amazônia, 2005) ABRUNHOSA, Fernando Araujo; PIRES, Marcus Alexandre Borges; LIMA, Jô de Farias; COELHO FILHO, Petrônio Alves
    The complete larval development of the ghost shrimp Lepidophthalmus siriboia Felder & Rodrigues, 1993 was described and illustrated in detail from specimens reared in the laboratory. Ovigerous females were collected at Canela Island in the northeastern region of the State of Pará. The larvae hatch as a prezoea, in which they persist for less than 3 hours. The larval development consists of three zoeal stages and a megalopa. The zoeal development averaged from 69 to 111 hours. The period in the megalopa stage was about 185 hours (about 8 days). The percentage of individuals succeeding in molt into juvenile stage was 91,8%. The first juvenile stage was reached 254 hours (about 10 days) after hatching. Morphological comparisons and their relationship with larvae of congeneric species are briefly discussed.
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    A note on the occurrence of praniza larvae of Gnathiidae (Crustacea, Isopoda) on fishes from Northeast of Pará, Brazil
    (2008-12) DINIZ, Daniel Guerreiro; VARELLA, Jamille Elzira de Almeida; HOSHINO, Maria Danielle Figueiredo Guimarães; SANTOS, Arthur Felipe Lima dos; FUJIMOTO, Rodrigo Yudi; MONFORT, Karla Cibele Fragoso; PIRES, Marcus Alexandre Borges; MARTINS, Maurício Laterça; EIRAS, Jorge Costa
    The infection of the estuarine teleost fishes Mugil gaimardianus Desmarest, 1831 (Mugilidae), Arius phrygiatus Valenciennes, 1839 (Ariidae), Conodon nobilis Linnaeus, 1759 (Haemulidae), Cetengraulis edentulus Cuvier, 1829 (Engraulidae), and Anableps anableps Linnaeus, 1758 (Anablepidae) by praniza larvae of Gnathiidae (Crustacea, Isopoda) was studied in specimens fished off the Atlantic Ocean in Northeast of Pará State, near Bragança, Brazil. The highest infection prevalence value was found in Anableps anableps (42.3%) and the lowest in Conodon nobilis (9.1%). The mean intensity varied from 1 parasitein Conodon nobilis to 19.5 in Arius phrygiatus. A description of the larvae is provided. The morphology of the mouthparts is related to the blood sucking activity, and is compared with the characteristics of other gnathiidae species.
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    Occurrence of Cymbasoma longispinosum Bourne, 1890 (Copepoda: Monstrilloida) in the Curuçá River estuary (Amazon Littoral)
    (2010-09) LEITE, Natália da Rocha; PEREIRA, Luci Cajueiro Carneiro; ABRUNHOSA, Fernando Araujo; PIRES, Marcus Alexandre Borges; COSTA, Rauquírio André Albuquerque Marinho da
    The present work was carried out to verify the occurrence and distribution of Cymbasoma longispinosum Bourne, 1890 in a tropical Amazon estuary from North Brazil. Samplings were performed bimonthly from July/2003 to July/2004 at two different transects (Muriá and Curuçá rivers) situated along the Curuçá estuary (Pará, North Brazil). Samples were collected during neap tides via gentle (1 to 1.5 knots) 200 μm-mesh net tows from a small boat. Additional subsurface water samples were collected for the determination of environmental parameters. Males and females of Cymbasoma longispinosum were only observed during September and November/2003. The highest number of organisms was found in September/2003 at the Muriá River transect. The presence of C. longispinosum in samples obtained during September and November/2003 could probably be related to the reproductive period of this species in the studied estuary, which is directly related to the dry period in the region. The highest salinity values and the highest number of individuals observed in September/2003 corroborate with the previous assumption, since no C. longispinosum was found during the months comprising the rainy period (January to June).
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    The early larval development of the tropical reef lobster Enoplometopus antillensis Lütken (Astacidea, Enoplometopidae) reared in the laboratory
    (2007-06) ABRUNHOSA, Fernando Araujo; SANTANA, Max William de Pinho; PIRES, Marcus Alexandre Borges
    The early stages of the tropical reef lobster Enoplometopus antillensis Lütken, 1865 were described and illustrated in detail from specimens reared in the laboratory. Ovigerous females were captured in their habitat, at a depth of about 15 meters and transported to the laboratory. The larvae were reared in a recirculation water tank for approximately 15 days and then transferred to four 10 liters aquariums. The larvae were fed on Artemia sp. nauplii. Microalgae Dunaliella viridis was added daily to the culture. The larvae moulted seven times progressing through the zoea VIII. Megalopa stage was not achieved. The intermoulting period of each stage averaged from eight to 12 days. Morphological comparisons with previous reports are briefly discussed.
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