Meiosis Maturation in the Marine Clam <i>Anomalocardia brasiliana</i> (Veneridae)

Lavander, Henrique David; Santos, Genialdo Dos; Olivera, Alfredo; Carvalho, Reginaldo de; Guerra, Marcelo; Coimbra, Maria Raquel Moura

doi:10.2983/035.036.0308

Cited by 3 publications

(7 citation statements)

References 29 publications

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“…Another study with A. flexuosa ( Lavander et al, 2017 ) also observed that the highest salinity tested (35 g⋅L −1 ) resulted in better extrusion rates of PB1 and PB2 as compared to 15 and 25 g⋅L −1 , corroborating the hypothesis that salinity interferes with the exit time of polar bodies. On the other hand, under the same conditions of temperature and salinity (26°C and 35 g⋅L −1 ), these authors found higher extrusion rates, such as of 70% for PB1 until the first 10 min and 62.67% for PB2 after 16 min of fertilization.…”

Section: Discussionmentioning

confidence: 57%

“…One of them refers to the possibility of interrupting the meiotic process by inhibiting the extrusion of PB1 or PB2 ( Piferrer et al, 2009 ). For this purpose, the determination of the moment of the exit of 50% of PB1 or PB2 after fertilization is important as a reference for the application of inducers ( Guo et al, 1996 ; Lavander et al, 2017 ; Melo et al, 2015 ). As in GVBD, salinity can also impact post-fertilization processes such as the timing of release or inhibition of polar bodies in bivalve mollusks ( Ma et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

“…The experimental units were thermostat regulated at 26 °C, which was considered as the ideal temperature for meiosis of the species ( Lavander et al, 2017 ). Diluted oocytes were distributed in 100 mL beakers, from which 1 mL aliquot was removed with the aid of a pipette for observation of the progression of GVBD ( Figure 1 ).…”

Section: Methodsmentioning

confidence: 99%

“…The average time to obtain the 50% of PB1 and PB2 extrusions for each treatment were determined as previously recommended ( Melo et al, 2015 ; Lavander et al, 2017 ).…”

Section: Methodsmentioning

confidence: 99%

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Effects of salinity on pre- and post-fertilization developmental events in the clam Anomalocardia flexuosa (Linnaeus, 1767)

et al. 2023

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The knowledge about the effect of salinity on the physiological mechanism of bivalve reproduction is fundamental to improve production strategies in hatcheries. The present work evaluated the influence of different salinity concentrations (15, 20, 25, 30, 35 and 40 g⋅L −1 ) on pre- and post-fertilization development processes in the clam, Anomalocardia flexuosa , oocytes obtained by stripping. Salinity directly interfered with the germinal vesicle breakdown (GVBD) rate and in the cellular stability of unfertilized oocytes. Salinity concentrations between 30 and 35 g⋅L −1 provided better percentages of stable GVBD within 120 min, and incubation of oocytes in the salinity range of 30-35 g⋅L −1 for a time interval of 80-120 min provided > 80% GVBD. In the post-fertilization analysis, salinity affected the rate of the extrusion of the first and second polar bodies (PB1 and PB2). The release of 50% of the PBs was faster at a salinity of 35 g⋅L −1 , with an estimated time of 10 min for PB1 and 30 min for PB2. Thus, chromosome manipulation methodologies aiming triploids should be applied at 35 g⋅L −1 salinity, with application of post-fertilization shock before 10 min for PB1 retention or before 30 min for PB2 retention.

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Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The average time to obtain the 50% of PB1 and PB2 extrusions for each treatment were determined as previously recommended ( Melo et al, 2015 ; Lavander et al, 2017 ).…”

Section: Methodsmentioning

confidence: 99%

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Effects of salinity on pre- and post-fertilization developmental events in the clam Anomalocardia flexuosa (Linnaeus, 1767)

et al. 2023

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“…A despeito de I. brasiliensis se constituir em um dos quatro mais importantes recursos de mariscagem e, em alguns casos, um recurso econômico (CARNEIRO;FARRAPEIRA;SILVA, 2008;FREITAS, 2011;MONTELES;FUNO;CASTRO, 2010;NÓBREGA, 2004;NOGUEIRA, 2012;PEREIRA et al, 2018;RASP, 1999), os resultados dessa revisão evidenciaram a escassez de dados disponíveis na literatura a seu respeito. O oposto ocorre para outros bivalves estuarinos comercialmente explorados como, por exemplo, Anomalocardia brasiliana e Crassostrea rhizophorae que já foram exaustivamente estudados sob os mais diversos aspectos (ARRUDA et al, 2009;AVEIRO;BARRERA-ARELLANO;TRAMONTE, 2009;CORTE;COLEMAN;AMARAL, 2017;DIETRICH et al, 1985;LAVANDER et al, 2017;LENZ;BOEHS, 2009;LITTLEWOOD, 2000;LITTLEWOOD;YOUNG, 1994;LUZ;BOEHS, 2011;NARCHI, 1972a;NASCIMENTO et al, 1986;PORA et al, 1969;SANTOS et al, 2017;VAISMAN;MARINS;LACERDA, 2005;WALLNER-KERSANACH;LOBO;SILVA, 1994). Desde o fi nal do século passado, espécies altamente exploradas e espécies de relevância econômica vêm sendo alvo de medidas de conservação e manejo (REYNOLDS et al, 2001), o que tem, portanto, ampliado o conhecimento a seu respeito.…”

Section: Nº Base De Dadosunclassified

Recursos Pesqueiros de Mariscagem: uma Revisão da Literatura Sobre Iphigenia brasiliensis

Ferreira

Duarte

Silva

2019

Ens Cien C Biol Agra Saúde

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O bivalve estuarino Iphigenia brasiliensis (Lamarck, 1818) é um recurso de mariscagem amplamente explorado nas regiões Norte e Nordeste do Brasil. Embora a espécie apresente relevância socioeconômica para muitas populações tradicionais, poucas informações a seu respeito estão disponíveis na literatura. Este trabalho teve como objetivo recuperar estudos nos quais I. brasiliensis fosse espécie modelo ou um dado direto da pesquisa. Para tanto, foi realizada uma revisão da literatura utilizando-se de quatro bases de dados digitais. Foram recuperadas 132 publicações, as quais foram caracterizadas por uma análise de conteúdo, bem como tiveram seus dados compilados para uma descrição estatística. Das publicações recuperadas, apenas 17 corresponderam a pesquisas diretamente relacionadas à espécie, ou seja, aquelas em que I. brasiliensis foi o objeto de estudo. A maior parte dos trabalhos levantados nesta revisão referiu-se a espécie, principalmente, como uma das capturas incidentais mais abundantes durante a catação de bivalves comercialmente mais rentáveis. Palavras-chave: Bivalve Estuarino. Catação de Moluscos. Captura Incidental. AbstractIphigenia brasliensis (Lamarck, 1818) is an estuarine bivalve used as commercial and subsistence resource by the traditional communities from North and Northeast of Brazil. Although its socioeconomic relevance, the species is poorly studied and information on it is very rare in the academic literature. The main aim of this review was to recover all available information on I. brasiliensis that was scattered among many different sources. For doing that a search was carried out using four digital databases. 132 publications were recovered and characterized by a content analysis, as well as had their data compiled for a statistical description. Of the recovered publications, only 17 corresponded to research directly related to the species, that is, to those in which I. brasiliensis was the object of study. Most of the literature recovered in this review referred to the species only as one of the most abundant bycatch during the exploitation of other commercially profitable bivalves. Keywords: Estuarine Bivalve. Mollusk Gathering. Bycatch.

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Genomes of two indigenous clamsAnomalocardia flexuosa(Linnaeus, 1767) andMeretrix petechialis(Lamarck, 1818)

Law,

Nong,

et al. 2024

Preprint

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Clam digging has a long history in Hong Kong, but unregulated clam digging activities depletes clam populations and threatens the ecosystem. Population genomics is useful to unravel the connectivity of clams at different geographical locations and to provide necessary conservation measures; and yet, only limited number of clams in Hong Kong have genomic resources. Here, we present chromosomal-level genome assemblies for two clams commonly found in Hong Kong, Anomalocardia flexuosa and Meretrix petechialis, using a combination of PacBio HiFi and Omni-C reads. We assembled each genome (~1.04-1.09 Gb) into 19 pseudochromosomes with high sequence continuity (scaffold N50 = 58.5 Mb and 53.5 Mb) and high completeness (BUSCO scores 94.4% and 95.7%). A total of 20,410 and 20,084 gene models were also predicted for A. flexuosa and M. petechialis respectively using transcriptomes generated in this study. The two new genomic resources established in this study will be useful for further study of the biology, ecology, and evolution of clams, as well as setting up a foundation for evidence-informed decision making in conservation measures and implementation.

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Meiosis Maturation in the Marine Clam Anomalocardia brasiliana (Veneridae)

Cited by 3 publications

References 29 publications

Effects of salinity on pre- and post-fertilization developmental events in the clam Anomalocardia flexuosa (Linnaeus, 1767)

Effects of salinity on pre- and post-fertilization developmental events in the clam Anomalocardia flexuosa (Linnaeus, 1767)

Recursos Pesqueiros de Mariscagem: uma Revisão da Literatura Sobre Iphigenia brasiliensis

Genomes of two indigenous clamsAnomalocardia flexuosa(Linnaeus, 1767) andMeretrix petechialis(Lamarck, 1818)

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