Synchronized broadcast spawning by six invertebrates (Echinodermata and Mollusca) in the north-western Red Sea

AbstractOn the evenings of June 11 and 12, 2019, 5 and 6 days before full moon, broadcast spawning by four echinoderm species and two mollusc species was observed on the Marsa Shagra reef, Egypt (25° 14′ 44.2" N, 34° 47′ 49.0" E). Water temperature was 28 °C and the invertebrates were observed at 2–8 m depth. The sightings included a single basket star Astroboa nuda (Lyman 1874), 2 large Tectus dentatus (Forskal 1775) sea snails, 14 individuals of the Leiaster cf. leachi (Gray 1840) sea star and 1 Mithrodia clavigera (Lamarck 1816) sea star, 3 Pearsonothuria graeffei (Semper 1868) sea cucumbers, and 2 giant clams, Tridacna maxima (Röding 1798). The observations presented here provide relevant information on broadcast spawning of non-coral invertebrate taxa in the Red Sea, where spawning is considerably less well documented than in other tropical geographical regions such as the Indo-Pacific and Caribbean.

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Correction to: Synchronized broadcast spawning by six invertebrates (Echinodermata and Mollusca) in the north-western Red Sea

Marine Biology ◽

10.1007/s00227-021-03889-w ◽

2021 ◽

Vol 168 (6) ◽

Author(s):

Alice E. Webb ◽

Aschwin H. Engelen ◽

Jessica Bouwmeester ◽

Inge van Dijk ◽

Esmee Geerken ◽

...

Keyword(s):

Red Sea ◽

Broadcast Spawning ◽

The North ◽

North Western

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Rift development in the Gulf of Suez and the north-western Red Sea: structural aspects and related sedimentary processes

Sedimentation and Tectonics in Rift Basins Red Sea:- Gulf of Aden ◽

10.1007/978-94-011-4930-3_7 ◽

1998 ◽

pp. 97-116 ◽

Cited By ~ 12

Author(s):

C. Montenat ◽

P. Ott d’Estevou ◽

J.-J. Jarrige ◽

J.-P. Richert

Keyword(s):

Red Sea ◽

Gulf Of Suez ◽

Sedimentary Processes ◽

The North ◽

North Western ◽

Structural Aspects

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Prevalence and Molecular Characteristics of Vibrio spp. Isolated from Preharvest Shrimp of the North Western Province of Sri Lanka

Journal of Food Protection ◽

10.4315/0362-028x.jfp-12-115 ◽

2012 ◽

Vol 75 (10) ◽

pp. 1846-1850 ◽

Cited By ~ 15

Author(s):

MADURA SANJEEVANI GONSAL KORALAGE ◽

THOMAS ALTER ◽

DUANGPORN PICHPOL ◽

ECKHARD STRAUCH ◽

KARL-HANS ZESSIN ◽

...

Keyword(s):

Sri Lanka ◽

Penaeus Monodon ◽

Molecular Characteristics ◽

Pathogenic Potential ◽

Western Province ◽

The North ◽

Geographical Regions ◽

Seafood Products ◽

North Western ◽

Vibrio Spp

This study investigated the prevalence and molecular characteristics of Vibrio spp. in farmed shrimp (Penaeus monodon) in Sri Lanka. A total of 170 shrimp samples (100 g of whole shrimp each) taken from individual ponds from 54 farms were collected 1 week prior to harvest from the North Western Province of Sri Lanka. Overall, 98.1% of the farms and 95.1% of the ponds were positive for Vibrio spp. in shrimp; at the pond level, V. parahaemolyticus (91.2%) was most common, followed by V. alginolyticus (18.8%), V. cholerae non-O1/non-O139 (4.1%), and V. vulnificus (2.4%). Multiple Vibrio spp. were detected in 20.6% of the ponds. None of the V. parahaemolyticus isolates (n = 419) were positive for the virulence-associated tdh (thermostable direct hemolysin) and trh (TDH-related hemolysin) genes. V. cholerae was confirmed by the presence of ompW, and all isolates (n = 8) were negative for the cholera toxin (ctxA) gene. V. cholerae isolates were serogrouped by PCR and identified as V. cholerae non-O1/non-O139. All four V. vulnificus strains, isolated from different ponds of two geographical regions, showed pathogenic potential; they belonged to vcgC sequence type, type B 16S rRNA genotype and contained a pilF polymorphism associated with human pathogenicity. The results of this study revealed the ubiquitous nature of vibrios in farmed shrimp. To minimize the potential risk of Vibrio infections due to handling or consumption of raw or undercooked seafood products, good manufacturing practices as well as proper handling and processing should be addressed.

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Transformation of Geosystems of the Northern Part of the Baikal Natural Territory (Research and Mapping)

The Bulletin of Irkutsk State University Series Earth Sciences ◽

10.26516/2073-3402.2021.35.44 ◽

2021 ◽

Vol 35 ◽

pp. 44-56

Author(s):

T. I. Konovalova ◽

◽

Keyword(s):

Far East ◽

Baikal Rift Zone ◽

Diagnostic Features ◽

Structural Dynamic ◽

The North ◽

Geographical Regions ◽

Essential Properties ◽

Definition Of ◽

North Western ◽

Natural Territory

The features of transformation of geosystems of the north-western part of the Baikal natural territory are considered. The transformation of geosystems is considered in the context of changes in their essential properties as a result of the manifestation of transformative dynamics and evolution. It is established that the modification of the geosystems of the region was largely caused by the horizontal compression of the earth's crust, which is characteristic only for this section of the Baikal rift zone. This led to the formation of the Pre-Baikal Depression between the Siberian Platform and the Baikal Ridge. The combination of geodynamic regimes of the weakly active platform and the area of continental rifting caused an ambiguous response of geosystems to climate change. The development of contrasting types of geosystems is revealed-from high-grass fir trees to swampy woodlands of larch with cedar elfin. In the physical and geographical conditions of the area, the strict subordination of geosystems to the higher structure is violated. As a result, unique geosystems are concentrated here. They combine in their composition the components peculiar to the physical and geographical regions of Siberia and the Far East. Plant communities of various formations are represented here. Geosystems at the regional level of the organization are subject to transformations. The basic techniques of mapping the transformation of geosystems are considered. Mapping involves solving three main tasks, which are traditionally defined as the identification, systematization and interpretation of geosystems. They consist in the definition of diagnostic features of geosystems; the synthesis of time and space in a single whole, taking into account regionaltypological specifics, structural-dynamic and evolutionary transformations.

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Stratigraphy of the Egyptian syn-rift deposits: correlations between axial and peripheral sequences of the north-western Red Sea and Gulf of Suez and their relations with tectonics and eustacy

Sedimentation and Tectonics in Rift Basins Red Sea:- Gulf of Aden ◽

10.1007/978-94-011-4930-3_13 ◽

1998 ◽

pp. 211-222 ◽

Cited By ~ 23

Author(s):

J.-C. Plaziat ◽

C. Montenat ◽

P. Barrier ◽

M.-C. Janin ◽

F. Orszag-Sperber ◽

...

Keyword(s):

Red Sea ◽

Gulf Of Suez ◽

The North ◽

North Western

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A statistical study of 238U and 234U/238U distributions in coral samples from the Egyptian shoreline of the north-western Red Sea and in fossil mollusk shells from the Atlantic coast of High Atlas in Morocco: Implications for 230Th/234U dating

Radiochimica Acta ◽

10.1524/ract.2002.90.6.329 ◽

2002 ◽

Vol 90 (6) ◽

Cited By ~ 7

Author(s):

A. Choukri ◽

J.-L. Reyss ◽

O.K. Hakam ◽

J. C. Plaziat

Keyword(s):

Red Sea ◽

Statistical Study ◽

Atlantic Coast ◽

Radiochemical Analysis ◽

Statistical Distributions ◽

The South ◽

High Atlas ◽

Mollusk Shells ◽

The North ◽

North Western

SummaryIn this work, radiochemical analysis results of 126 unrecrystallized coral samples from the Egyptian shoreline of northwestern Red Sea and 120 fossil mollusk shell samples from the Atlantic coast of Moroccan High Atlas at the North of Agadir City in Morocco are presented and discussed. The coral samples were collected in Egypt from the emerged coral reef terraces over 500 km from The Ras Gharib-Ras Shukeir depression (28°10') in the north to Wadi Lahami (north of Ras Banas, 24°10') in the south. The fossil mollusk shells were collected in Morocco from Agadir-Harbour in the south to Tamri village in the north extending over about 50 km. The statistical distributions of results (For corals,For mollusk shells, except for Holocene sea level,

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Porites fontanesii, a new species of hard coral (Scleractinia, Poritidae) from the southern Red Sea, the Gulf of Tadjoura, and the Gulf of Aden, and its phylogenetic relationships within the genus

Zootaxa ◽

10.11646/zootaxa.3447.1.4 ◽

2012 ◽

Vol 3447 (1) ◽

pp. 56 ◽

Cited By ~ 9

Author(s):

FRANCESCA BENZONI ◽

FABRIZIO STEFANI

Keyword(s):

New Species ◽

Red Sea ◽

Scleractinian Coral ◽

Coral Species ◽

Distinct Species ◽

Gulf Of Aden ◽

Hard Coral ◽

The North ◽

North Western ◽

A New Species

A new zooxanthellate reef-dwelling scleractinian coral species, Porites fontanesii sp. nov. (Scleractinia, Poritidae), is de-scribed. The examined material was collected from the Southern Red Sea, the Gulf of Tadjoura, and the Gulf of Aden.Porites fontanesii sp. nov. was most frequently observed along the Yemen south Red Sea and the north-western Gulf ofAden coasts. Although a complete molecular phylogeny of Porites is not available yet, the relationships between P. fon-tanesii sp. nov. and twenty other species of the genus were explored through analysis of the available rDNA sequences.Porites fontanesii sp. nov. was seen to be a distinct species basal to, and well divergent from, one of the two main clades so far identified in the genus rDNA phylogeny.

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