A Noninvasive Technique for Determining Sex of Live Adult North American Sturgeons

Vecsei, Paul; Litvak, Matthew K.; Noakes, David L. G.; Rien, Tom; Hochleithner, M.

doi:10.1023/b:ebfi.0000005732.98047.f3

Cited by 37 publications

(30 citation statements)

References 10 publications

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“…Total length (nearest cm) and wet weight were recorded for each individual (Table 1). Sex was not included as an explanatory variable in any analyses because sex could not be determined for 75 % of acoustic-tagged individuals (North American sturgeon are difficult to sex unless captured in spawning-ready condition [18]). All acoustic-tagged lake sturgeon were captured and released upstream of the Chenal a bot Rond confluence and downstream of Pt.…”

Section: Lake Sturgeon Capture and Taggingmentioning

confidence: 99%

Effects of acoustic tag implantation on lake sturgeon Acipenser fulvescens: lack of evidence for changes in behavior

2015

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Section: Lake Sturgeon Capture and Taggingmentioning

confidence: 99%

Effects of acoustic tag implantation on lake sturgeon Acipenser fulvescens: lack of evidence for changes in behavior

2015

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“…A method was developed to determine the sex of some sturgeon species (A. oxyrinchus, A. brevirostrum, and A. medirostris) by examination of the shape of the external urogenital, the accuracy of which is as high as 82%, but this method is not suitable for other sturgeon species (59). Because there is no external sexual dimorphism in the some sturgeon, for example, the Russian sturgeon, the development of internal gonads is the only biomarker for sex identification.…”

mentioning

confidence: 99%

Discovery and identification of candidate sex-related genes based on transcriptome sequencing of Russian sturgeon (Acipenser gueldenstaedtii) gonads

Chen

Xia²,

Shao

et al. 2016

Physiological Genomics

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Discovery and identification of candidate sex-related genes based on transcriptome sequencing of Russian sturgeon (Acipenser gueldenstaedtii) gonads. Physiol Genomics 48: 464 -476, 2016. First published May 6, 2016 doi:10.1152/physiolgenomics.00113.2015.-As the Russian sturgeon (Acipenser gueldenstaedtii) is an important food and is the main source of caviar, it is necessary to discover the genes associated with its sex differentiation. However, the complicated life and maturity cycles of the Russian sturgeon restrict the accurate identification of sex in early development. To generate a first look at specific sex-related genes, we sequenced the transcriptome of gonads in different development stages (1, 2, and 5 yr old stages) with next-generation RNA sequencing. We generated Ͼ60 million raw reads, and the filtered reads were assembled into 263,341 contigs, which produced 38,505 unigenes. Genes involved in signal transduction mechanisms were the most abundant, suggesting that development of sturgeon gonads is under control of signal transduction mechanisms. Differentially expressed gene analysis suggests that more genes for protein synthesis, cytochrome c oxidase subunits, and ribosomal proteins were expressed in female gonads than in male. Meanwhile, male gonads expressed more transposable element transposase, reverse transcriptase, and transposase-related genes than female. In total, 342, 782, and 7,845 genes were detected in intersex, male, and female transcriptomes, respectively. The female gonad expressed more genes than the male gonad, and more genes were involved in female gonadal development. Genes (sox9, foxl2) are differentially expressed in different sexes and may be important sex-related genes in Russian sturgeon. Sox9 genes are responsible for the development of male gonads and foxl2 for female gonads.

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“…Sexual dimorphism between females and males is very clear for some fish species with differences in body shape, coloration, caudal fin shape, number of genital openings, etc. However, most flatfish do not show any morphological difference between sexes and either cannulation or ovarian biopsy is needed (Vecsei et al, 2003). In this study with P. adspersus the identification of females and males was carried out by cannulation.…”

Section: Discussionmentioning

confidence: 99%

Broodstock management of the fine flounder Paralichthys adspersus (Steindachner, 1867) using recirculating aquaculture systems

Carrera

Cota

Montes

et al. 2013

lajar

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ABSTRACT. The present study describes the methodology used at IMARPE for the capture, acclimation and management of P. adspersus broodstock using recirculating aquaculture systems (RAS). RAS improved the water quality and maintained the environmental parameters during the acclimation period, temperature (17.2±1ºC), oxygen (8.1±0.7 mg L -1 ), pH (7.3±0.2), ammonia (0.004±0.003 mg L -1 ), nitrite (0.52±0.2 mg L -1 ) and nitrate (3.45±2.6 mg L -1 ). Fish began to be fed normally from day 15 post-capture, once or twice a day using live fish (Odonthestes regia regia, Mugil cephalus), crustacean (Emerita analoga), fresh food (Engraulis ringens and Dosidicus gigas) and artificial feed. A significant loss in the weight of the fish was registered during the first days of captivity, followed by a continuous increase in both sexes. The specific growth rate was positive from the third month of captivity, being the relative growth rate 24.5% and 16.2% in August 2010 in males and females, respectively. Different internal and external parasites were detected in the fish, being Entobdella sp. and Philometra sp. the prevailing parasites observed during samplings. Keywords: Paralichthys adspersus, reproduction, recirculating aquaculture system, broodstock management, culture, Peru. Manejo de reproductores del lenguado Paralichthys adspersus (Steindachner, 1867)usando sistemas de recirculación en acuicultura RESUMEN. El presente trabajo, describe la metodología desarrollada en IMARPE para la captura, aclimatación y acondicionamiento de ejemplares adultos de P. adspersus en sistemas de recirculación (SRA), con la finalidad de formar un stock de reproductores. El SRA permitió manejar parámetros medioambientales estables durante el periodo de acondicionamiento, como: temperatura del agua (17,2±1ºC), oxígeno disuelto (8,1±0,7 mg L -1 ), pH (7,3±0,2), amonio (0,004±0,003 mg L -1 ), nitrito (0,52±0,2 mg L -1 ) y nitrato (3,45±2,6 mg L -1 ). Se dio inicio a la alimentación el día 15 post-captura, utilizando alimento vivo (Odonthestes regia regia, Mugil cephalus), crustáceos (Emerita analoga), alimento fresco (Engraulis ringens y Dosidicus gigas) y artificial semihúmedo. Durante los primeros días de acondicionamiento los peces mostraron una disminución en el peso, hasta su adaptación a las condiciones de cultivo, luego de lo cual se produjo un incremento continuo en ambos sexos. La tasa específica de crecimiento fue positiva a partir del tercer mes y la tasa de crecimiento relativo mostró que en agosto 2010, el peso promedio se incrementó 24,5% en machos y 16,2% en hembras. Se realizó un análisis patológico a los ejemplares capturados y se observó la presencia de diferentes parásitos internos y externos, entre ellos predominaron Entobdella sp. y Philometra sp. Latin American Journal of Aquatic ResearchPalabras clave: Paralichthys adspersus, reproducción, sistema de recirculación en acuicultura, manejo de reproductores, cultivo, Perú.

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A Noninvasive Technique for Determining Sex of Live Adult North American Sturgeons

Cited by 37 publications

References 10 publications

Effects of acoustic tag implantation on lake sturgeon Acipenser fulvescens: lack of evidence for changes in behavior

Effects of acoustic tag implantation on lake sturgeon Acipenser fulvescens: lack of evidence for changes in behavior

Discovery and identification of candidate sex-related genes based on transcriptome sequencing of Russian sturgeon (Acipenser gueldenstaedtii) gonads

Broodstock management of the fine flounder Paralichthys adspersus (Steindachner, 1867) using recirculating aquaculture systems

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