Observations on the life history of a rare shrimp, Salmoneus carvachoi (Crustacea: Caridea: Alpheidae), a possible simultaneous hermaphrodite

2015 ◽  
Vol 8 ◽  
Author(s):  
M.V. Oliveira ◽  
A.C. Costa-Souza ◽  
F.J. Guimarães ◽  
A.O. Almeida ◽  
J.A. Baeza
Keyword(s):  
Life History ◽  
Sampling Period ◽  
Simultaneous Hermaphrodite ◽  
Intertidal Flat ◽  
Western Atlantic ◽  
Generalist Species ◽  
Eastern Brazil ◽  
North Eastern ◽  
History Of ◽  
Snapping Shrimps

This study reports on the life history of a rare alpheid shrimp,Salmoneus carvachoi, in the tropical western Atlantic. At an intertidal flat in Pontal Bay, Ilhéus, Bahia, north-eastern Brazil,S. carvachoiwas collected from within burrows of the axianassid mud shrimpAxianassa australisand the caridean snapping shrimpsAlpheus estuariensisandAlpheus chacei. These and earlier studies that reportedS. carvachoiin dwellings constructed by other larger burrowing crustaceans suggest thatS. carvachoiis a generalist species that establishes facultative symbiotic partnerships with larger burrowing decapods. We collected a total of 52 individuals during the sampling period (1 year); 19 (36.5%) of these shrimps carried embryos underneath the abdomen. The mean ± SD carapace length was 4.7 ± 0.7 and 5.5 ± 0.3 mm in non-brooding and brooding shrimps, respectively. All collected specimens, whether or not brooding embryos, bear appendices masculinae on the endopods of the second pleopods. Burrows harboured only one or two shrimps and never three or more shrimps. Pairs of shrimp that inhabited burrows consisted of two brooding shrimps (N = 3 pairs), two non-brooding shrimps (N = 3), or one brooding and one non-brooding shrimp (N = 1). The presence of appendices masculinae in all collected shrimps, whether or not brooding embryos, and the pairing of brooding shrimp within host burrows suggest thatS. carvachoiis a simultaneously hermaphroditic species.

A new species of Thorecta (Porifera: Demospongiae) from the western Atlantic, with remarks on the taxonomy of the genus

2010 ◽  
Vol 90 (4) ◽  
pp. 775-782 ◽  
Author(s):  
Josivete P. Santos ◽  
Suzane M. da Silva ◽  
Paulo H.O. Bonifácio ◽  
Eduardo L. Esteves ◽  
Ulisses S. Pinheiro ◽  
...  
Keyword(s):  
New Species ◽  
Valid Species ◽  
Northern Coast ◽  
Western Atlantic ◽  
Eastern Brazil ◽  
Potiguar Basin ◽  
The Family ◽  
North Eastern ◽  
History Of ◽  
A New Species

The family Thorectidae includes 23 valid genera and 130 species, characterized by the presence of laminated fibres and diplodal choanocytye chambers. Currently the genus Thorecta comprises approximately 20 valid species, distributed mainly in the Indo-Pacific. We describe here a new species of Thorecta that is the only valid species of the genus described in the Atlantic Ocean so far. Samples were collected by trawling on board of the RV ‘Astro Garoupa’ in Potiguar Basin, on the northern coast of Rio Grande do Norte State, north-eastern Brazil. Thorecta atlantica sp. nov. is greyish-brown to dark brownish-grey and presents a distinctive globular or clavulate shape, with 1–2 large apical oscules that open to deep atria. It was found between 61 and 160 m depth. A literature survey suggests that many species referred to Thorecta should be relocated to different genera due to absence of diagnostic characters, and that the genus Thorecta should group only 11 species: T. carteri, T. marginalis, T. prima, T. lata, T. farlovi, T. meandrina, T. polygona, T. reticulata, T. tuberculata, T. vasiformis and T. atlantica sp. nov. The tortuous history of the genus is an example of the damage that poorly-described species can cause to classification. Detailed descriptions of fresh material, well illustrated by photographs and including as many characters as possible, are essential tools for the clarification of the systematics of Thorecta in the future.

Taxonomy of Nystiellidae (Caenogastropoda, Epitonioidea) from Brazil, with description of three new species from the South-western Atlantic

2017 ◽  
Vol 98 (7) ◽  
pp. 1619-1644 ◽  
Author(s):  
Alexandre Dias Pimenta ◽  
Bruno Garcia Andrade ◽  
Ricardo Silva Absalão
Keyword(s):  
Rio Grande ◽  
Taxonomic Revision ◽  
South Atlantic ◽  
Shell Morphology ◽  
The South ◽  
Western Atlantic ◽  
North East ◽  
The North ◽  
Eastern Brazil ◽  
North Eastern

A taxonomic revision of the Nystiellidae from Brazil, including samples from the Rio Grande Rise, South Atlantic, was performed based on shell morphology. Five genera and 17 species were recognized. For the richest genus,Eccliseogyra, the three species previously recorded from Brazil were revised:E. brasiliensisandE. maracatu, previously known only from their respective type series, were re-examined. Newly available material ofE. maracatuexpanded the known geographic range of this species to off south-east Brazil.Eccliseogyra nitidais now recorded from north-eastern to south-eastern Brazil, as well as from the Rio Grande Rise. Three species ofEccliseogyraare newly recorded from the South Atlantic:E. monnioti, previously known from the north-eastern Atlantic, occurs off eastern Brazil and on the Rio Grande Rise; its protoconch is described for the first time, confirming its family allocation.Eccliseogyra pyrrhiasoccurs off eastern Brazil and on the Rio Grande Rise, andE. folinioff eastern Brazil. The genusIphitusis newly recorded from the South Atlantic.Iphitus robertsiwas found off northern Brazil, although the shells show some differences from the type material, with less-pronounced spiral keels. Additional new finds showed thatIphitus cancellatusranges from eastern Brazil to the Rio Grande Rise, and Iphitusnotiossp. nov. is restricted to the Rio Grande Rise.Narrimania, previously recorded from Brazil based on dubious records, is confirmed, including the only two living species described for the genus:N. azelotes, previously only known from the type locality in Florida, andN. concinna, previously known from the Mediterranean. A third species,Narrimania raquelaesp. nov. is described from eastern Brazil, diagnosed by its numerous and thinner cancellate sculpture. To the three species ofOpaliopsispreviously known from Brazil, a fourth species,O. arnaldoisp. nov., is added from eastern Brazil, and diagnosed by its very thin spiral sculpture, absence of a varix, and thinner microscopic parallel axial striae.Papuliscala nordestina, originally described from north-east Brazil, is recorded off eastern Brazil and synonymized withP. elongata, a species previously known only from the North Atlantic.

scholarly journals Life history of Tanais dulongii (Tanaidacea: Tanaidae) in an intertidal flat in the southwestern Atlantic

2012 ◽  
Vol 32 (6) ◽  
pp. 891-898 ◽  
Author(s):  
Carlos E. Rumbold ◽  
Eduardo D. Spivak ◽  
Sandra M. Obenat
Keyword(s):  
Life History ◽  
Intertidal Flat ◽  
Southwestern Atlantic ◽  
History Of

Life history and reproductive dynamics of the cryptogenic calcareous sponge Sycettusa hastifera (Porifera, Calcarea) living in tropical rocky shores

2016 ◽  
Vol 98 (3) ◽  
pp. 505-514 ◽  
Author(s):  
Emilio Lanna ◽  
Michelle Klautau
Keyword(s):  
Life History ◽  
Seawater Temperature ◽  
Body Part ◽  
Minimum Size ◽  
Rocky Shores ◽  
Western Atlantic ◽  
High Fecundity ◽  
Calcareous Sponge ◽  
History Of ◽  
Wet Weight

Life history accounts for the chance of survival and reproductive success of a species, considering, for example, when, how often and how much a species reproduces. Consequently, it is directly related to the success or failure of bioinvasions. Here, we investigated some aspects of the life history of the cryptogenic calcareous sponge Sycettusa hastifera. A population from Arraial do Cabo, Brazil (south-western Atlantic) was investigated from September 2008 to December 2009 by monthly collections and histological analyses. We observed that S. hastifera reproduced continuously throughout the year without seasonality and presented high fecundity. The fecundity was not different depending on the sponge body part (top or base), but it was related to the wet weight of the sponge (although a minimum size was not required for reproduction). Reproduction could not be predicted by the seawater temperature. The reproductive characteristics of S. hastifera were similar to those of other previously studied calcareous sponges. Sycettusa hastifera shows traits of an invasive species, such as high fecundity, short life cycle, early sexual maturity and the ability to use pioneer habitats. Consequently, it possesses several characteristics that would allow it to invade new areas.

scholarly journals A new cryptic species of Pithecopus (Anura, Phyllomedusidae) in north-eastern Brazil

2020 ◽  
Vol 723 ◽  
pp. 108-134
Author(s):  
Felipe Silva De Andrade ◽  
Isabelle Aquemi Haga ◽  
Johnny Sousa Ferreira ◽  
Shirlei Maria Recco-Pimentel ◽  
Luís Felipe Toledo ◽  
...  
Keyword(s):  
Cryptic Species ◽  
Evolutionary History ◽  
Small Body ◽  
Head Width ◽  
The Andes ◽  
Eastern Brazil ◽  
Sister Clade ◽  
North Eastern ◽  
Geographical Barrier ◽  
History Of

The genus of Neotropical frogs Pithecopus includes 11 species occurring east of the Andes from southern Venezuela to northern Argentina. Recent genetic approaches pointed out an unusual genetic diversity among populations from localities in north-eastern Brazil recognized as P. nordestinus. In fact, one of these studies confirmed the hypothesis that the São Francisco River acted as an effective geographical barrier during vicariant events in the evolutionary history of P. nordestinus, resulting in two principal, highly divergent clades. Herein we formally describe this divergent clade as a new cryptic species of Pithecopus from north-eastern Brazil, the sister clade of P. nordestinus. It differs from other species of Pithecopus, except for P. azureus and P. nordestinus, by its small body size, lack of the reticulate pattern on flanks, smaller head width, and advertisement calls generally composed of a three-pulsed core.

scholarly journals NOTES ON SOME SPECIES OF MELOE OCCURRING IN TEMPERATE NORTH-EASTERN AMERICA

1877 ◽  
Vol 9 (4) ◽  
pp. 75-80
Author(s):  
F. B. Caulfield
Keyword(s):  
Life History ◽  
North Eastern ◽  
History Of

The life history of Meloe, as given by the Editor in the December No. of this journa1, agreeing very closely with that of M. angusticollis Say, as far as my knowledge of its habits will permit me to judge, it occurred to me on reading Mr. Brodie's very interesting notes in the January No., that unless we have in this country a double brooded Meloe, some one must be referring another species to Say's angusticollis.

scholarly journals Early life ecology of the invasive lionfish (Pterois spp.) in the western Atlantic

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0243138
Author(s):  
Jason Mostowy ◽  
Estrella Malca ◽  
Leif Rasmuson ◽  
Lourdes Vásquez-Yeomans ◽  
Trika Gerard ◽  
...  
Keyword(s):  
Life History ◽  
Early Life ◽  
Generalized Additive Models ◽  
Larval Growth ◽  
Early Life History ◽  
Additive Models ◽  
Control Mechanisms ◽  
Ecological Stability ◽  
Western Atlantic ◽  
History Of

The invasion of the western Atlantic by the Indo-Pacific lionfish (Pterois volitans/miles) is a serious threat to the ecological stability of the region. The early life history of the lionfish remains poorly understood despite the important role that larval supply plays reef fish population dynamics. In this study, we characterized patterns in the horizontal and vertical distributions of larval lionfish collected in the western Caribbean, US Caribbean, and the Gulf of Mexico from 19 ichthyoplankton surveys conducted from 2009–2016. Using generalized additive models (GAMs), we assessed the relative effects of spatiotemporal and environmental variation on the distribution of lionfish larvae. We also examined otoliths to determine larval ages and report the first larval growth rate estimates for this species. Lionfish larvae were present at 7.8% of all stations sampled and our model suggests that lionfish presence is related to sea surface temperature and the lunar cycle. Year and location also strongly affected the larval distribution, likely reflecting the ongoing expansion of the species during our sampling timeframe. Much of the variation in larval lionfish presence remained unexplained, and future studies should incorporate additional environmental factors to improve model predictions. This study improves our understanding of the lionfish life cycle and accentuates the need for further research into the early life history of this invasive species. The design and implementation of effective long-term lionfish control mechanisms will require an understanding of their entire life history.

scholarly journals Food and nutrition insecurity: a marker of vulnerability to asthma symptoms

2013 ◽  
Vol 17 (1) ◽  
pp. 14-19 ◽  
Author(s):  
Rita de Cássia Ribeiro-Silva ◽  
Ana Marlúcia Oliveira-Assis ◽  
Samuel Badaró Junqueira ◽  
Rosemeire Leovigildo Fiaccone ◽  
Sandra Maria Chaves dos Santos ◽  
...  
Keyword(s):  
Food Insecurity ◽  
International Study ◽  
Cross Sectional Study ◽  
Phase Iii ◽  
Cross Sectional ◽  
Asthma Symptoms ◽  
Eastern Brazil ◽  
Food And Nutrition ◽  
North Eastern ◽  
History Of

AbstractObjectiveTo evaluate the association between food and nutrition insecurity and asthma in children from Latin America.DesignCross-sectional study.SettingSão Francisco do Conde, Bahia, north-eastern Brazil.SubjectsThe study included 1307 children aged 6–12 years from public elementary schools. Asthma symptoms were collected using a questionnaire that was translated and adapted from the International Study of Asthma and Allergies in Childhood, phase III. The diagnosis of asthma was determined based on reports of wheezing in the previous 12 months. The Brazilian Food Insecurity Scale was used to identify food insecurity. We also obtained demographic, socio-economic and anthropometric information for each participant. We used multivariate logistic regression analyses to assess the associations of interest.ResultsOf the children surveyed, 10·4 % had a history of wheezing and 64·5 % had some degree of food and nutrition insecurity. We found a positive dose–response relationship and statistically significant associations of asthma with moderate (OR = 1·71, 95 % CI 1·01, 2·89) and severe (OR = 2·51, 95 % CI 1·28, 4·93) food and nutrition insecurity.ConclusionsThe results show that moderate and severe food and nutrition insecurity are markers of vulnerability to wheezing. It is important to note that the results of studies in this field have potential implications for social policies that promote food security. Further studies to identify the mechanisms involved in the relationship between food and nutrition insecurity and asthma are needed.

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