Continuous reproduction and episodic recruitment in nine shrimp species inhabiting a tropical seagrass meadow

1989 ◽  
Vol 127 (2) ◽  
pp. 175-187 ◽  
Author(s):  
Raymond T. Bauer
Keyword(s):  
Seagrass Meadow ◽  
Shrimp Species ◽  
Continuous Reproduction ◽  
Episodic Recruitment

scholarly journals Novel Allergen Discovery through Comprehensive De Novo Transcriptomic Analyses of Five Shrimp Species

2020 ◽  
Vol 22 (1) ◽  
pp. 32
Author(s):  
Shaymaviswanathan Karnaneedi ◽  
Roger Huerlimann ◽  
Elecia B. Johnston ◽  
Roni Nugraha ◽  
Thimo Ruethers ◽  
...  
Keyword(s):  
De Novo ◽  
Penaeus Monodon ◽  
Clinical Importance ◽  
Major Allergen ◽  
Cross Reactivity ◽  
Multiple Sequence ◽  
Alpha Tubulin ◽  
Shrimp Species ◽  
Allergen Sources ◽  
Shellfish Allergy

Shellfish allergy affects 2% of the world’s population and persists for life in most patients. The diagnosis of shellfish allergy, in particular shrimp, is challenging due to the similarity of allergenic proteins from other invertebrates. Despite the clinical importance of immunological cross-reactivity among shellfish species and between allergenic invertebrates such as dust mites, the underlying molecular basis is not well understood. Here we mine the complete transcriptome of five frequently consumed shrimp species to identify and compare allergens with all known allergen sources. The transcriptomes were assembled de novo, using Trinity, from raw RNA-Seq data of the whiteleg shrimp (Litopenaeus vannamei), black tiger shrimp (Penaeus monodon), banana shrimp (Fenneropenaeus merguiensis), king shrimp (Melicertus latisulcatus), and endeavour shrimp (Metapenaeus endeavouri). BLAST searching using the two major allergen databases, WHO/IUIS Allergen Nomenclature and AllergenOnline, successfully identified all seven known crustacean allergens. The analyses revealed up to 39 unreported allergens in the different shrimp species, including heat shock protein (HSP), alpha-tubulin, chymotrypsin, cyclophilin, beta-enolase, aldolase A, and glyceraldehyde-3-phosphate dehydrogenase (G3PD). Multiple sequence alignment (Clustal Omega) demonstrated high homology with allergens from other invertebrates including mites and cockroaches. This first transcriptomic analyses of allergens in a major food source provides a valuable resource for investigating shellfish allergens, comparing invertebrate allergens and future development of improved diagnostics for food allergy.

Episodic recruitment in the saguaro cactus is driven by multidecadal periodicities

Ecology ◽  
2021 ◽  
Author(s):  
Ricardo E. Félix‐Burruel ◽  
Eugenio Larios ◽  
Edgar J. González ◽  
Alberto Búrquez
Keyword(s):  
Episodic Recruitment

Distinctive genetic signatures of two fairy shrimp species with overlapping ranges in Iberian temporary ponds

2021 ◽  
Author(s):  
Regina Lopes da Cunha ◽  
Jordi Sala ◽  
Margarida Machado ◽  
Dani Boix ◽  
Celine Madeira ◽  
...  
Keyword(s):  
Temporary Ponds ◽  
Fairy Shrimp ◽  
Shrimp Species ◽  
Genetic Signatures

Seagrass surveys in Shwe Thaung Yan coastal areas, the southern part of Rakhine Coastal Region, Myanmar: biodiversity, coverage and biomass

2019 ◽  
Vol 8 (3) ◽  
pp. 105-112
Author(s):  
Thu- Rein
Keyword(s):  
Seasonal Variations ◽  
Seagrass Meadow ◽  
Monsoon Season ◽  
Coastal Region ◽  
Coastal Areas ◽  
Dry Season ◽  
Percent Cover ◽  
Study Sites ◽  
Seagrass Coverage

Studies on percent cover and biomass of seagrasses from Shwe Thaung Yan coastal areas (Inn Din Gyi, Kyauk Nagar and Phoe Htaung Gyaing), the Southern parts of Rakhine Coastal Region, were carried out between March and August, 2018. A total of 8 species of seagrasses, namely Syringodiumisoetifolium (Ascherson) Danty, Halodulepinifolia (Miki) den Hartog, Haloduleuninervis (Forsskal) Ascherson, Cymodocearotundata Ehrenberg et Hemprich ex Ascherson, C. serrulata (R. Brown) Ascherson et Magnus, Thalassiahemprichii(Ehrenberg) Ascherson, Halophila major (Zoll.) Miquel and Enhalusacoroides (Linnaeus f.) Royle, were recorded in three study sites. Seagrass meadow in this study showed seasonal variations in both percent cover and biomass. Total seagrass coverage and biomass were higher in the dry season than in the monsoon season. Total seagrass coverage ranged between 8% and 75% in Phoe Htaung Gyaing, between 10% and 42% in Kyauk Nagar, and between 15% and 43% in Inn Din Gyi. Total seagrass mean biomass was 50.2413-259.846gdry.wtm-2 in Phoe Htaung Gyaing, 63.0194 -321.535gdry.wtm-2 in Kyauk Nagar, and 98.6819-416.237gdry.wtm-2 in Inn Din Gyi.

DNA barcoding and phylogenetic relationship of shrimps (Crustacea: Decapoda) of Bangladesh

2021 ◽  
Vol 7 (1) ◽  
pp. 941-946
Author(s):  
Md Sagir Ahmed ◽  
Sumaiya Salam ◽  
Sayeda Sabrina Sarwar Rumana ◽  
Anindita Barua
Keyword(s):  
Dna Barcoding ◽  
Genetic Divergence ◽  
New Records ◽  
Coi Gene ◽  
Identification System ◽  
Taxonomic Rank ◽  
Macrobrachium Nipponense ◽  
Shrimp Species ◽  
The Mean ◽  
Relationship Of

We adopted DNA barcoding technique using a 658-bp fragment of the mitochondrial cytochrome c oxidase I (COI) gene to identify shrimp species collected from the different areas of Bangladesh. A total of 24 sequences were generated belonging to 14 species including four new records- Macrobrachium nipponense, Macrobrachium kistnense, Exopalaemon carinicauda and Alpheus malleator. Genetic distance measured with Kimura 2 parameter showed that genetic divergence increased with higher taxonomic rank. The mean genetic divergence was evaluated and found to be 0.935%, 22.67% and 30.92% within species, genus and family, respectively. In addition to the barcode-based species identification system, phylogenetic relationships were established where individuals belonging to the same species were grouped under the same clade. Maximum likelihood (ML) was preferred as the statistical method and as expected, the phylogenetic tree complemented and ensured the conventional taxonomy. The present study evidently showed that DNA barcoding can be served as an effective tool to discriminate the shrimp species and this will enhance the understanding on evolution and conservation biology. Bioresearch Commu. 7(1): 941-946, 2021 (January)

scholarly journals Reproductive features of the swimming crab Callinectes danae(Crustacea, Portunoidea) on the subtropical coast of Brazil: a sampling outside the estuary

2015 ◽  
Vol 75 (3) ◽  
pp. 692-702 ◽  
Author(s):  
LS Andrade ◽  
M Antunes ◽  
PA Lima ◽  
M Furlan ◽  
IF Frameschi ◽  
...  
Keyword(s):  
Sexual Maturity ◽  
Temporal Distribution ◽  
Reproductive Pattern ◽  
Swimming Crab ◽  
Exposed Area ◽  
Continuous Reproduction ◽  
Spatio Temporal ◽  
Marine Areas ◽  
Reproductive Females ◽  
Callinectes Danae

AbstractThe life cycle of the crab Callinectes danae is estuarine-dependent, and studies on aspects of their biology should also cover marine areas. The present study investigated the sexual maturity, as well as habitat preference by adults in different gonadal stages, and the crabs’ reproductive periodicity outside the estuary. Three bays on the subtropical southeastern coast of Brazil were sampled monthly for two years. For each bay, six transects were established, four of them parallel to the beach line (5, 10, 15 and 20 m depth), as well as one transect in an exposed area, and another sheltered from the action of waves. The results showed that the pattern of spatio-temporal distribution of adults C. danae was similar in three bays, although the highest abundance was found in Ubatumirim. Females with developed gonads/ovigerous females were found in greater abundance than females with rudimentary/developing gonads, mainly in deeper transects. Although the areas sampled have different environmental characteristics, the reproductive pattern of the species did not change, showing continuous reproduction throughout, with more abundance of reproductive females on spring and summer. Males reached maturity at larger sizes than females in all three bays.

scholarly journals COMPORTAMENTO FENOLÓGICO DE Emmotum nitens (Benth.) Miers (METTENIUSACEAE) EM FRAGMENTO DE CERRADÃO

Nativa ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 33
Author(s):  
Patrícia Oliveira da Silva
Keyword(s):  
Rainy Season ◽  
Reproductive Phenology ◽  
Fruit Maturation ◽  
Ripe Fruit ◽  
Flower Bud ◽  
Circular Statistic ◽  
Immature Fruit ◽  
Temperature And Precipitation ◽  
Continuous Reproduction ◽  
Reproductive Events

Emmotum nitens é uma espécie bem conhecida em termos de florística e fitossociologia, entretanto, há poucos trabalhos que tratam-se de sua fenologia. Este estudo buscou avaliar a fenologia reprodutiva de uma população de E. nitens no Município de Rio Verde, Goiás. Observou-se mensalmente as fenofases reprodutivas (botão, antese, fruto imaturo e maduro) de 15 indivíduos. Para a coleta dos dados utilizou-se o método de Fournier e presença/ausência, e para analisar os mesmos utilizou-se a estatística circular e correlação com as variáveis meteorológicas (temperatura e precipitação). E. nitens produziu botões e flores de modo irregular ao longo do estudo, no entanto se correlacionaram positivamente com a temperatura. Durante todo estudo registrou-se frutos imaturos, embora as maiores concentrações ocorreram na transição do período seco-chuvoso e durante as chuvas, correlacionando-se positivamente com a precipitação. A maturação dos frutos iniciou-se no final da estação das chuvas, com maiores intensidades no período seco. Para E. nitens é mais vantajoso apresentar reprodução continua já que a mesma não é fortemente limitada pelas variáveis climáticas da área de estudo, do que seguir um padrão sazonal.Palavra-chave: fenologia, espécie de cerrado, eventos reprodutivos, correlação com metereologia. PHENOLOGICAL BEHAVIOR OF EMMOTUM NITENS (BENTH.) MIERS (METTENIUSACEAE) ON CERRADÃO FRAGMENT ABSTRACT:Emmotum nitens is a well-known species in terms of floristic and phytosociology, however, there are few studies that deal with its phenology. The objective of this study was to evaluate the reproductive phenology of a population of E. nitens in the municipality of Rio Verde, Goiás. The reproductive phenomena (flower bud, anthesis, immature fruit and ripe fruit) were observed monthly in 15 individuals. Fournier method and presence/absence were used to collect the data, and to analyze them, the circular statistic and correlation with the meteorological variables (temperature and precipitation) were used. E. nitens produced flower bud and flowers irregularly throughout the study, however they correlated positively with temperature. During the whole study immature fruits were recorded, although the highest concentrations occurred in the transition from the dry-rainy season and during the rains, correlating positively with the precipitation. Fruit maturation began at the end of the rainy season, with higher intensities in the dry season. For E. nitens it is more advantageous to present continuous reproduction since it is not strongly limited by the climatic variables of the study area, rather than following a seasonal pattern.Keywords: phenology, species of cerrado, reproductive events, correlation with meteorology. DOI:

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