Neil Duncan

Institute for Research and Technology in Food and Agriculture

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Sandra Ramos-Júdez

Institute for Research and Technology in Food and Agriculture

Alicia Estévez

Institute for Research and Technology in Food and Agriculture

Zohar Ibarra‐Zatarain

Universidad Tecnológica de Nayarit

Elvira Fatsini

University of Algarve

Ignacio Carazo

Pontificia Universidad Católica del Ecuador

Sonia Rey

University of Stirling

Ignacio Giménez

Instituto Valenciano de Investigaciones Agrarias

Joan Cerdà

Institut de Ciències del Mar

Fernando Norambuena

University of Aberdeen

WÁ

Wendy Ángela González-López

Institute for Research and Technology in Food and Agriculture

Cooperative Institutions

Institute for Research and Technology in Food and Agriculture

Consejo Superior de Investigaciones Científicas

Hellenic Centre for Marine Research

University of Stirling

Centre National de la Recherche Scientifique

Centro de Investigación en Alimentación y Desarrollo

Cultura

University of Crete

Institut de Ciències del Mar

University of Algarve

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The cleaner fish Elacatinus figaro can control the monogenean Neobenedenia melleni, an ectoparasite of Lebranche mullet Mugil liza and does not decrease the hematological response

Journal of Parasitic Diseases (2024)

Maurício Laterça Martins Ana Paula de Souza João Gabriel Miranda Lessa Elenice Martins Brasil Neil Duncan

Mullet

Mugil

Mean corpuscular hemoglobin

10.1007/s12639-024-01775-y

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Changes in the Breeding Biology of the Herring Gull (Larus argentatus) Induced by Reduction in the Size and Density of the Colony

Journal of Animal Ecology (1982)

J. C. Coulson Neil Duncan Callum Thomas

Herring gull

10.2307/4002

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Citations (165)

Paired spawning with male rotation of meagre Argyrosomus regius using GnRHa injections, as a method for producing multiple families for breeding selection programs

Aquaculture (2018)

Neil Duncan Constantinos C. Mylonas Edwards Milton Sullon Dimitris Karamanlidis Maria Claudia França Nogueira

10.1016/j.aquaculture.2018.06.017

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Citations (17)

Toward developing recombinant gonadotropin-based hormone therapies for increasing fertility in the flatfish Senegalese sole

PLoS ONE (2017)

François Chauvigné Judith Ollé Wendy González Neil Duncan Ignacio Giménez

Captive flatfishes, such as the Senegalese sole, typically produce very low volumes of sperm. This situation is particularly prevalent in the first generation (F1) of reared sole males, which limits the development of artificial fertilization methods and the implementation of selective breeding programs. In this study, we investigated whether combined treatments with homologous recombinant follicle-stimulating (rFsh) and luteinizing (rLh) hormones, produced in a mammalian host system, could stimulate spermatogenesis and enhance sperm production in Senegalese sole F1 males. In an initial autumn/winter experiment, weekly intramuscular injections with increasing doses of rFsh over 9 weeks resulted in the stimulation of gonad weight, androgen release, germ cell proliferation and entry into meiosis, and the expression of different spermatogenesis-related genes, whereas a subsequent single rLh injection potentiated spermatozoa differentiation. In a second late winter/spring trial corresponding to the sole's natural prespawning and spawning periods, we tested the effect of repeated rLh injections on the amount and quality of sperm produced by males previously treated with rFsh for 4, 6, 8 or 10 weeks. These latter results showed that the combination of rFsh and rLh treatments could increase sperm production up to 7 times, and slightly improve the motility of the spermatozoa, although a high variability in the response was found. However, sustained administration of rFsh during spawning markedly diminished Leydig cell survival and the steroidogenic potential of the testis. These data suggest that in vivo application of rFsh and rLh is effective at stimulating spermatogenesis and sperm production in Senegalese sole F1 males, setting the basis for the future establishment of recombinant gonadotropin-based hormone therapies to ameliorate reproductive dysfunctions of this species.

Gonadotropin

10.1371/journal.pone.0174387

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Citations (36)

Hormonal control of reproduction in Senegalese sole (Solea senegalensis)

Evaristo L. Mañanós José M. Guzmán Neil Duncan J.B. Peleteiro-Alonso M.O. Chereguini-Fernández-Maquieira

Trabajo presentado en el V Workshop The cultivation of the Soles, celebrado en Faro (Portugal) del 5 al 7 de abril de 2011.

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Aquaculture production of meagre ( Argyrosomus regius ): hatchery techniques, ongrowing and market

Elsevier eBooks (2013)

Neil Duncan Alicia Estévez H. Fernández‐Palacios Ignasi Gairín C.M Hernández-Cruz

Hatchery

Broodstock

Production cycle

Captivity

10.1533/9780857097460.3.519

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Citations (63)

Permanent Genetic Resources added to Molecular Ecology Resources Database 1 April 2010 – 31 May 2010

Molecular Ecology Resources (2010)

Karl B. Andrée Jan Axtner Mark J. Bagley E. J. BARLOW Trevor J. C. Beebee

This article documents the addition of 396 microsatellite marker loci to the Molecular Ecology Resources Database. Loci were developed for the following species: Anthocidaris crassispina, Aphis glycines, Argyrosomus regius, Astrocaryum sciophilum, Dasypus novemcinctus, Delomys sublineatus, Dermatemys mawii, Fundulus heteroclitus, Homalaspis plana, Jumellea rossii, Khaya senegalensis, Mugil cephalus, Neoceratitis cyanescens, Phalacrocorax aristotelis, Phytophthora infestans, Piper cordulatum, Pterocarpus indicus, Rana dalmatina, Rosa pulverulenta, Saxifraga oppositifolia, Scomber colias, Semecarpus kathalekanensis, Stichopus monotuberculatus, Striga hermonthica, Tarentola boettgeri and Thermophis baileyi. These loci were cross-tested on the following species: Aphis gossypii, Sooretamys angouya, Euryoryzomys russatus, Fundulus notatus, Fundulus olivaceus, Fundulus catenatus, Fundulus majalis, Jumellea fragrans, Jumellea triquetra Jumellea recta, Jumellea stenophylla, Liza richardsonii, Piper marginatum, Piper aequale, Piper darienensis, Piper dilatatum, Rana temporaria, Rana iberica, Rana pyrenaica, Semecarpus anacardium, Semecarpus auriculata, Semecarpus travancorica, Spondias acuminata, Holigarna grahamii, Holigarna beddomii, Mangifera indica, Anacardium occidentale, Tarentola delalandii, Tarentola caboverdianus and Thermophis zhaoermii.

Fundulus

10.1111/j.1755-0998.2010.02898.x

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Citations (81)

Reproductive behaviour and fertilized spawns in cultured Solea senegalensis broodstock co-housed with wild breeders during their juvenile stages

General and Comparative Endocrinology (2024)

Wendy Ángela González-López Sandra Ramos-Júdez Neil Duncan

Broodstock

10.1016/j.ygcen.2024.114546

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Citations (4)

Low sperm to egg ratio required for successful in vitro fertilisation in a pair-spawning teleost, Senegalese sole (Solea senegalensis)

bioRxiv (Cold Spring Harbor Laboratory) (2020)

Sandra Ramos-Júdez Wendy Ángela González-López Jhons Huayanay Ostos Noemí Cota Mamani Carlos Marrero Alemán

Abstract Cultured Senegalese sole ( Solea senegalensis ) breeders fail to spawn fertilised eggs and this bottleneck could be solved with the implementation of large-scale in vitro fertilisation protocols. However, low production of poor-quality sperm has frustrated the development of in vitro fertilisation protocols. Cultured females were induced to ovulate with a 5 µg kg -1 single injection of gonadotropin releasing hormone agonist (GnRHa) and good quality eggs (82.6 ± 9.2% fertilisation) were stripped 41:57 ± 1:46 h after the injection. Sperm was collected from cultured males, diluted in modified Leibovitz and used fresh to fertilise the eggs. A non-linear regression, an exponential rise to a maximum (R = 0.93, P < 0.0001) described the number of motile spermatozoa required to fertilise a viable egg and 1617 motile spermatozoa were sufficient to fertilise 99 ± 12% (± 95% CI) of viable eggs. Similar, spermatozoa egg -1 ratios of 592 ± 611 motile spermatozoa egg -1 were used in large-scale in vitro fertilisations with 190,512 ± 38,471 eggs. The sperm from a single male (145 ± 50 µL or 8.0 ± 6.8 × 10 8 spermatozoa) was used to fertilise the eggs. The mean hatching rate of the large-scale in vitro fertilisations was 70 ± 14 % to provide 131,540 ± 34,448 larvae per fertilisation. When unfertilised eggs were stored at room temperature the percentage of viable eggs decreased gradually and indicated the sooner eggs were fertilised after stripping the higher the viability of the eggs. The collection of sperm directly into a syringe containing modified Leibovitz significantly increased the percentage of motile spermatozoa (33.4 ± 12.2 %) compared to dilution in modified Leibovitz immediately after collection (6.6 ± 4.9 %). Senegalese sole have a pair-spawning reproductive behaviour characterised by external gamete fertilisation in close proximity with no sperm competition. The low spermatozoa egg -1 ratio required for maximum fertilisation was consistent with this reproductive behaviour and strategy. The provision of a large-scale in vitro fertilisation protocol (200 µL of sperm per 100 mL of eggs) will enable the industry to operate sustainably and implement breeding programs to improve production.

Fertilisation

Spawn (biology)

Milt

10.1101/2020.08.26.267740

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Reproductive biology of captive bullseye puffer (Sphoeroides annulatus), LHRHa induced spawning and egg quality

Fish Physiology and Biochemistry (2003)

Neil Duncan Noemí García-Aguilar G. Rodríguez-M. de O.Marie Bernadet Carlos Cristian Martínez‐Chávez

Spawn (biology)

Captivity

Yolk

10.1023/b:fish.0000030642.77253.0b

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Citations (9)