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Tallas y fecundidad de Juxtafabia muliniarum (Brachyura: Pinnotheridae) asociado con Saccostrea palmula (Bivalvia: Ostreidae), Costa Rica
Cabrera Pe?a,Jorge; Protti Quesada,Maurizio; Urriola Hernández,Mario; Sáenz Vargas,Osvaldo; Alfaro Hidalgo,Rebeca;
Revista de Biología Tropical , 2001,
Abstract: size and fecundity observations of pea crab (juxtafabia muliniarum) from the paleal cavity of!he oyster saccostrea palmula were made from may 1998 to may 1999. infestation frequency was 18.52 % in a sample of 540 oysters. of 136 pea crabs, 36 % were couples, 60 % were single females and 4 % were single males. the mean caparace length of j. muliniarum was 5.6 + 0.74 mm (range 4.0 to 7.6 mm) for females and 2.7 + 0.60 mm (range 1.6 to 4.0 mm) for males. the mean weight was 0.180 + 0.084 g (range 0.06 to 0.4g) for females and 0.011 + 0.003 g (range 0.01 to 0.02 g) for males. ovigerous females (43.75 % of all females) were found in all months. the caparace length - fecundity relationship was f = 3904.6 ln (lc) -4651.1. the caparace length-weight relationship was p = 6 x 10-4 lc3.2122. the mean sex-ratio was 1.0 male: 2.4 females. saccostrea palmula infected only by females was the dominant group (60.78 %). this mollusk is a new host record for the crab
Tallas y fecundidad de Juxtafabia muliniarum (Brachyura: Pinnotheridae) asociado con Saccostrea palmula (Bivalvia: Ostreidae), Costa Rica  [cached]
Jorge Cabrera Pe?a,Maurizio Protti Quesada,Mario Urriola Hernández,Osvaldo Sáenz Vargas
Revista de Biología Tropical , 2001,
Abstract: Se determinaron las tallas, frecuencia de infección y fecundidad de Juxtafabia muliniarum de la cavidad paleal de Saccostrea palmula de mayo de 1998 a mayo de 1999, la frecuencia de infestación fue de un 18.52 % en una muestra de 540 ostras. De los 136 cangrejos, el 36 % fueron parejas, el 60 % hembras solas y el 4 % machos solos. El promedio de la longitud del caparazón fue de 5.6 + 0.74 mm (ámbito entre 4.0 y 7.6 mm) para hembras y 2.71 + 0.60 mm (ámbito entre 1.6 y 4.0 mm) para machos. El peso promedio fue de 0.180 + 0.084 g (ámbito entre 0.06 y 0.4 g) para hembras y 0.011 + 0.003 g (ámbito entre 0.01 y 0.02 g) para machos. La fecundidad de J. muliniarum se rigió por la ecuación F = 3904.6 Ln (Lc) -4651.1. En todos los meses se encontraron hembras ovígeras. La relación longitud del caparazón-peso total para machos y hembras se rigió porla ecuación Pt = 6 X 10-4 Lc3.2122. La proporción sexual fue de 1.0 macho: 2.04 hembras. Se registra a S. palmula como huésped de J. muliniarum Size and fecundity observations of pea crab (Juxtafabia muliniarum) from the paleal cavity of!he oyster Saccostrea palmula were made from May 1998 to May 1999. Infestation frequency was 18.52 % in a sample of 540 oysters. Of 136 pea crabs, 36 % were couples, 60 % were single females and 4 % were single males. The mean caparace length of J. muliniarum was 5.6 + 0.74 mm (range 4.0 to 7.6 mm) for females and 2.7 + 0.60 mm (range 1.6 to 4.0 mm) for males. The mean weight was 0.180 + 0.084 g (range 0.06 to 0.4g) for females and 0.011 + 0.003 g (range 0.01 to 0.02 g) for males. Ovigerous females (43.75 % of all females) were found in all months. The caparace length - fecundity relationship was F = 3904.6 Ln (Lc) -4651.1. The caparace length-weight relationship was P = 6 X 10-4 Lc3.2122. The mean sex-ratio was 1.0 male: 2.4 females. Saccostrea palmula infected only by females was the dominant group (60.78 %). This mollusk is a new host record for the crab
The Histopathology of the Infection of Tilapia rendalli and Hypostomus regani (Osteichthyes) by Lasidium Larvae of Anodontites trapesialis (Mollusca, Bivalvia)
Silva-Souza, ?ngela Teresa;Eiras, Jorge C;
Memórias do Instituto Oswaldo Cruz , 2002, DOI: 10.1590/S0074-02762002000300029
Abstract: it is described the histopathology of the infection of tilapia rendalli (osteichthyes, perciformes, cichlidae) and hypostomus regani (osteichthyes, siluriformes, loricariidae) by lasidium larvae of anodontites trapesialis (mollusca, bivalvia, mycetopodidae). the larvae were encysted within the epidermis of the host, being surrounded by a thin hyaline membrane, 3-6 μm thick, of parasite origin. a proliferative host cell reaction did not occur. the histopathology of the infection shows that the lesions induced by the parasites are minimal. however, the numerous small lesions produced by the release of the larvae may provide optimal conditions for the infection by opportunistic pathogens, namely fungus, which may eventually cause the death of the host.
The Histopathology of the Infection of Tilapia rendalli and Hypostomus regani (Osteichthyes) by Lasidium Larvae of Anodontites trapesialis (Mollusca, Bivalvia)  [cached]
Silva-Souza ?ngela Teresa,Eiras Jorge C
Memórias do Instituto Oswaldo Cruz , 2002,
Abstract: It is described the histopathology of the infection of Tilapia rendalli (Osteichthyes, Perciformes, Cichlidae) and Hypostomus regani (Osteichthyes, Siluriformes, Loricariidae) by lasidium larvae of Anodontites trapesialis (Mollusca, Bivalvia, Mycetopodidae). The larvae were encysted within the epidermis of the host, being surrounded by a thin hyaline membrane, 3-6 μm thick, of parasite origin. A proliferative host cell reaction did not occur. The histopathology of the infection shows that the lesions induced by the parasites are minimal. However, the numerous small lesions produced by the release of the larvae may provide optimal conditions for the infection by opportunistic pathogens, namely fungus, which may eventually cause the death of the host.
Erosion of the prismatic layer by the organic matrix during the formation of the nacre-prism transition layer in the shell of Pinctada fucata (Bivalvia, Mollusca)
XiaoJun Liu,Chang Liu,Juan Sun,YuJuan Zhou,GuiLan Zheng,GuiYou Zhang,HongZhong Wang,LiPing Xie,RongQing Zhang
Chinese Science Bulletin , 2011, DOI: 10.1007/s11434-011-4348-8
Abstract: Three variants of the sequence of formation of the nacre-prism transition layer were observed in Pinctada fucata (Bivalvia, Mollusca) shells. In each case, the layer was formed by the organic matrix secreted by the mantle, together with the interprismatic organic envelope. The continuity of the organic phase throughout the shell was maintained as the new nacreous layer was formed on the nacre-prism transition layer. Changes in the interprismatic organic envelopes on either side of the nacre-prism transition zone indicated that the organic matrix of the nacre-prism transition layer becomes embedded into the organic phase of the prismatic layer. It is concluded that penetration and erosion of the prisms by the organic matrix generates a strong bond between the prismatic and nacreous layers.
Comparative morphology among representatives of main taxa of Scaphopoda and basal protobranch Bivalvia (Mollusca)
Simone, Luiz Ricardo L.;
Papéis Avulsos de Zoologia (S?o Paulo) , 2009, DOI: 10.1590/S0031-10492009003200001
Abstract: this study deals with detailed morphology and anatomy of 4 species of scaphopoda and 5 species of protobranch bivalvia. both classes are traditionally grouped in the taxon diasoma, which has been questioned by different methodologies, such as molecular and developmental. this study is developed under a phylogenetic methodology with the main concern in performing it in an intelligible and testable methodology. the analyzed scaphopoda species came from the brazilian coast and belong to the family dentaliidae [(1) coccodentalium carduus; (2) paradentalium disparile] and gadiliidae; [(3) polyschides noronhensis, n. sp. from fernando de noronha archipelago; (4) gadila braziliensis]. these species represent the main branches of the class scaphopoda. from protobranch bivalves, representatives of the families solemyidae [(5) solemya occidentalis, from florida; s. notialis, n. sp. from s.e. brazil], nuculanidae [(6) propeleda carpentieri from florida], and nuculidae [(7) ennucula puelcha, from south brazil] are included. these species represent the main branches of the basal bivalvia. the descriptions on the anatomy of s. occidentalis and of p. carpentieri are published elsewhere. the remaining are included here, for which a complete taxonomical treatment is performed. beyond these species, representatives of other taxa are operationally included as part of the ingroup (indices are then shared with them), as a procedure to test the morphological monophyly of diasoma. these taxa are: two lamellibranch bivalves [(8) barbatia - arcidae; (9) serratina - tellinidae; both published elsewhere;, and propilidium (10) patellogastropoda, and (11) nautilus, basal cephalopoda, based on basal taxa. the effective outgroups are (12) neopilina (monoplacophora) and (13) hanleya (polyplacophora). the phylogenetic analysis based on morphology revealed that the taxon diasoma is supported by 14 synapomorphies, and is separated from cyrtosoma (gastropoda + cephalopoda). although they are not the m
Exotic molluscs (Mollusca, Gastropoda et Bivalvia) in Santa Catarina State, Southern Brazil region: check list and regional spatial distribution  [PDF]
A. Ignacio Agudo-Padrón
Biodiversity Journal , 2011,
Abstract: A total of twenty-one exotic mollusc taxa were assessed for Santa Catarina State (SC), fifteen Gastropoda andsix Bivalvia (twelve terrestrial, five limnic/freshwater - three gastropods and two bivalves, and four marinebivalves). Of these, fourteen are confirmed as invasive species (nine terrestrial, three limnic/freshwater, andtwo marine).
Perfil de lípidos y ácidos grasos de Perna viridis, mejillón verde (Mollusca: Bivalvia) en el oriente venezolano y la costa oeste de Trinidad
Koftayan,Tamar; Milano,Jahiro; D′Armas,Haydelba; Salazar,Gabriel;
Revista de Biología Tropical , 2011,
Abstract: lipid and fatty acid profile of perna viridis, green mussel (mollusca: bivalvia) in different areas of the eastern venezuela and the west coast of trinidad. the species perna viridis is a highly consumed species, which fast growth makes it an interesting aquaculture alternative for venezuelan and trinidad coasts. with the aim to contribute with its nutritional value information, this study analyzed lipid and fatty acid contents from samples taken in five locations from eastern venezuela and three from trinidad west coast. total lipids were extracted and quantified, from a pooled sample of 100 organisms per location, by standard gravimetric methods, and their identification and quantification was done by tlc/fid (iatroscan system). furthermore, the esterified fatty acids of total lipid, phospholipids and triacylglycerols were identified and quantified by gas chromatography. eastern venezuela samples from los cedros, la brea and chaguaramas showed the highest total lipid values of 7.92, 7.74 and 7.53, respectively, and the minimum values were obtained for la restinga (6.08%). among lipid composition, chacopata samples showed the lowest phospholipid concentration (48.86%) and the maximum values for cholesterol (38.87%) and triacylglycerols (12.26%); besides, la esmeralda and rio caribe samples exhibited maximum phospholipids (88.71 and 84.93 respectively) and minimum cholesterol (6.50 and 4.42%) concentrations. saturated fatty acids represented between 15.04% and 65.55% within total lipid extracts, with maximum and minimum values for la esmeralda and chacopata, respectively. polyunsaturated results resulted between 7.80 and 37.18%, with higher values in la brea and lower values in la esmeralda. for phospholipids, saturated fatty acids concentrations varied between 38.81 and 48.68% for chaguaramas and chacopata samples, respectively. in the case of polyunsaturated fatty acids, these varied between non detected and 34.51%, with high concentrations in los cedros (27.97%)
Comunidad de moluscos asociados al mejillón verde Perna viridis (Mollusca: Bivalvia) y sus relaciones tróficas en la costa norte de la Península de Araya, Estado Sucre, Venezuela
Villafranca,Sioliz; Jiménez,Mayré;
Revista de Biología Tropical , 2006,
Abstract: mollusc communities associated with the green mussel perna viridis (mollusca: bivalvia) and their trophic relations on the north coast of araya peninsula, sucre state, venezuela. perna viridis (linné, 1758) is an indo-pacific bivalve of the intertidal zone that has invaded several ecosystems of the north coast of the sucre state,venezuela. bimonthly samplings were carried out between october 1997 and august 1998 to study the mollusc communities associated with this species and their trophic relationships.studies were conducted on a naturally-occuring bank of mussels two meters deep on the north coast of the peninsula of araya (10°40?n -48°63?w). sample organisms were collected withing areas defined by a quadrat of 0.25 m2, and were identified to the species level using taxonomic keys that also included bibliographic identification of trophic level. a total of 1 235 individuals of p. viridis were collected, along with 3 163 specimens of associated species belonging to the phylum mollusca, including bivalves, gastropods and polyplacophora.the associated mollusc organisms represented 50 species corresponding to 10 orders and 24 families, including 25 gastropod species, 22 bivalves and three polyplacophorans. with regard to trophic level 40% of the 50 species were suspensivores, 26% carnivores, 24% herbivores and the residual 10% represented two categories (suspensivore-detritivore, herbivore-suspensivore). of the suspensivores the most common were: perna perna, musculus lateralis, crassostrea rhizophorae and ostrea equestris. the carnivore group was dominated by the three species of the family columbellidae, mitrella lunata, anachis obesa and nitidella ocellata.the group of herbivores was dominated by two members of the family fisurellidae, diodora cayenensis and d. minuta.two species of suspensivore-detritívore and three species of herbivore-suspensivore were also found in the genus crepidula. the high percentage of suspensivores was thought indicative, inside this ec
Perfil de lípidos y ácidos grasos de Perna viridis, mejillón verde (Mollusca: Bivalvia) en el oriente venezolano y la costa oeste de Trinidad
Tamar Koftayan,Jahiro Milano,Haydelba D′Armas,Gabriel Salazar
Revista de Biología Tropical , 2011,
Abstract: Los lípidos totales fueron extraídos, identificados y cuantificados por gravimetría, mediante TLC/FID (sistema Iatroscan). Los ácidos grasos de los lípidos totales, fosfolípidos y triacilgliceroles fueron identificados y cuantificados por cromatografía de gases. Las mayores concentraciones de lípidos totales se presentaron en las muestras de Los Cedros, La Brea y Chaguaramas con valores de 7.92, 7.74 y 7.53%; respectivamente y los valores mínimos en las de La Restinga (6.08%). En la composición lípidica, las muestras de Chacopata presentaron la menor concentración de fosfolípidos (48.86%) y los máximos valores de colesterol (38.87%) y triacilgliceroles (12.26%), y las muestras de La Esmeralda y Río Caribe exhibieron concentraciones máximas de fosfolípidos (88.71-84.93%, respectivamente) y mínimas de colesterol (6.50-4.42%). En los lípidos totales, los ácidos grasos saturados se encontraron entre 15.04 y 65.55%, con máximos en muestras de La Esmeralda y mínimos en Chacopata y los poliinsaturados estuvieron entre 7.80 y 37.18%, con máximos valores en la Brea y mínimos en la Esmeralda. En los fosfolípidos, la concentración de ácidos grasos saturados estuvo entre 38.81 y 48.68% para las muestras de Chaguaramas y Chacopata, respectivamente; los ácidos grasos poliinsaturados se encontraron entre no detectado y 34.51%, con altas concentraciones en muestras de Los Cedros (27.97%) y Chaguaramas (34.51%). En los triacilgliceroles, la composición de ácidos grasos saturados variaron entre 14.27 y 53.80%, con baja concentración en Chacopata y alta concentración en La Restinga; los ácidos grasos poliinsaturados estuvieron entre 4.66 y 35.55%, con valores menores en las muestras de Chacopata (4.66%) y mayores en Chaguaramas. El consumo frecuente de Perna viridis es recomendable, debido a su alto contenido de fosfolípidos y ácidos grasos insaturados. Lipid and fatty acid profile of Perna viridis, Green Mussel (Mollusca: Bivalvia) in different areas of the Eastern Venezuela and the West coast of Trinidad. The species Perna viridis is a highly consumed species, which fast growth makes it an interesting aquaculture alternative for Venezuelan and Trinidad coasts. With the aim to contribute with its nutritional value information, this study analyzed lipid and fatty acid contents from samples taken in five locations from Eastern Venezuela and three from Trinidad West Coast. Total lipids were extracted and quantified, from a pooled sample of 100 organisms per location, by standard gravimetric methods, and their identification and quantification was done by TLC/FID (Iatroscan s
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