Rosario Domínguez-Petit

Instituto Español de Oceanografia | IEO · Centro Oceanográfico de Vigo

The main aim of the ICES WKMEGRIM benchmark was to standardize, increase transparency, and review the input data of the assessment for three megrim stocks; namely two Lepidorhombus whiffiagonis stocks in divisions 7.b–k, 8.a–b, and 8.d (meg.27.7b-k8abd) and divisions 8.c and 9.a (meg.27.8c9a), as well as L. boscii in divisions 8.c and 9.a (ldb.27.8...

Fish fecundity is one of the most relevant parameters for the estimation of the reproductive potential of fish stocks, used to assess the stock status to guarantee sustainable fisheries management. Fecundity is the number of matured eggs that each female fish can spawn each year. The stereological method is the most accurate technique to estimate f...

Semana de trabajo en línea sobre el desarrollo de software de código abierto utilizando lenguajes de programación R y Python para el tratamiento de datos científicos: datos marinos espaciales y temporales y procesado de datos acústicos submarinos. https://intercoonecta.aecid.es/programaci%C3%B3n-de-actividades/hackaton-en-ciencia-marina-en-espa-ol

Desarrollo de una comunidad virtual de intercambio entre programadores de la región y sentar las bases de conocimientos en lenguajes de programación y entornos de código abierto en datos oceanográficos, marinos y gestión de pesca https://intercoonecta.aecid.es/programaci%C3%B3n-de-actividades/introducci-n-al-uso-de-software-de-c-digo-abierto-aplic...

The oceans are facing increasing pressure related to water warming, acidification, pollution, overex-ploitation and illegal activities, which generate biodiversity loss and ecosystem degradation, placing at risk the provision of goods and services. In order to preserve healthy and resilient marine ecosystems , adaptive scientific tools for the sust...

European hake (Merluccius merluccius) is a commercially important resource in Iberian Atlantic waters. Despite the recovery plan implemented in 2006 and the multiannual management plan for western waters, fishing mortality is still higher than that corresponding to the maximum sustainable yield for the southern European hake stock. The biological p...

Atlantic chub mackerel is a pelagic species present in the Atlantic Ocean that in recent decades has expanded northwards in the eastern Atlantic. Fish samples were collected in scientific surveys and commercial catches between 2011 and 2019. We analysed the geographical variation of the biological parameters (age, length, weight and condition), as...

Daily growth patterns and their relationship with reproduction was analyzed in the European hake from the Galician Shelf, where it shows a very protracted spawning with three spawning peaks. The daily growth analysis was performed in otoliths of adult females on the transversal section of the sagittae otolith. Daily increments were measured from th...

The reproductive success of aquatic animals depends on a complex web of relationships between the environment, the attributes of the reproductive individuals and human-induced selection. All of them are manifested directly or indirectly through parental effects, which can also compensate for certain external impacts. Parental effects refer to the i...

Abstract: The Atlantic chub mackerel (Scomber colias) is one of the main fishing resources for the fisheries targeting small pelagics in NW African waters. This species is expanding its geographical distribution through higher latitudes in southern European Atlantic waters, and it has become an important fishing resource in Iberian Atlantic waters...

La celebración del V SIBECORP en Colombia, fue motivada por el interés de enriquecer la discusión sobre la reproducción en organismos acuáticos y su importancia para las pesquerías de ecosistemas tropicales, lo que ha sido escasamente abordado en pasadas ediciones. Por ello, los talleres temáticos de esta edición se dedicaron a Pesquerías de pequeñ...

O III SIBECORP será constituído por uma programação abrangente, envolvendo 106 Trabalhos (53 pôsteres, 34 apresentações orais e 19 palestras) que versam sobre temas relevantes no Brasil; Argentina; Espanha; Portugal; Colômbia; Chile; Peru e México. Os palestrantes e debatedores convidados são pesquisadores de prestígio no Brasil ou atuantes em dive...

SIBERCORP es uno de los eventos más importantes de la red INVIPESCA que tiene el fin de establecer cada tres años un foro de discusión científico para promover la aplicación del enfoque de ecosistemas en la gestión de las pesquerías iberoamericanas, a partir de la inclusión de aspectos biológicos, ecológicos, ambientales y socioeconómicos en la eva...

Flemish Cap cod collapsed in the early 90’s after facing multiple threats due to climate variability and anthropogenic pressures. A master 35-year cod growth chronology was reconstructed in the present study by using sclerochronology techniques. Three additional chronologies were developed to account for the age-dependent effect of maturity and fis...

The link between the dynamic organization of the ovary and spawning dynamics was investigated in pelagic fishes with indeterminate fecundity. Αn array of laboratory methods and statistical approaches was applied to samples of gonadal material from three commercial NE Atlantic fish species: the sardine, Sardina pilchardus, the horse mackerel, Trachu...

Doce años después de la celebración del I Simposio Iberoamericano de Ecología Reproductiva, Reclutamiento y Pesquerías-SIBECORP y de la creación de la Red Iberoamericana de Investigación Pesquera-Red INVIPESCA tenemos entre manos una publicación que resume y compila los conocimientos compartidos en las cuatro ediciones de SIBECORP celebradas hasta...

The European hake (Merluccius merluccius) is represented as one of the most valuable fisheries in the Galician shelf. We analyzed the distribution, abundance, and environmental conditions of the southern-stock European hake larvae from the Galician shelf during the two main spawning peaks, winter-spring and summer, based on the data from three icht...

The Galician shelf (northwestern Iberian Peninsula) is a highly dynamic area with an important multi-species fisheries industry that exploits resources from several habitats, characterized by being not only highly diverse, rich, and productive but also seasonally and interannually variable. Early life stages of different species are distributed thr...

Citation: Mbaidin, A.; Rábade-Uberos, S.; Dominguez-Petit, R.; Villaverde, A.; Gónzalez-Rufino, M.E.; Formella, A.; Fernández-Delgado, M.; Cernadas, E. STERapp: Semiautomatic Software for Stereological Analysis. Application in the Estimation of Fish Fecundity. Electronics 2021, 10, 1432. https:// Abstract: Stereology is the tridimensional interpret...

The growth pattern and parameters of Atlantic chub mackerel in Northern Iberian waters were analysed for the first time in this study, using otolith analyses (direct age estimation-DAE, back-calculation-BC and otolith marginal analyses) and length frequency analyses (Bhattacharya, SLCA and PROJMAT methods), on a time series of data from 2011 to 201...

Maturity parameters of the megrim (Lepidorhombus whiffiagonis) and the four spot megrim (L. boscii) stocks in Atlantic Iberian waters (Div. 8.c-9.a) and in Celtic Seas and northern Bay of Biscay (Div. 7.b-k, 8.abd) Abstract The maturity ogives of megrim (L whiffiagonis) and four spot megrim (L. boscii) stocks in Atlantic Iberian waters (ICES Div. 8...

Mean weight-at-age of fish species is an indicator of fish growth and physiological condition, as well as a basic parameter for assessing and managing fish stocks. Here, we investigated the temporal trends of the mean weight-at-age for four different commercial species with different life strategy: i) the short-lived pelagic European sardine (Sardi...

Presentation of the INVIPESCA network objectives, activities and history

The assessment of postovulatory follicles (POFs) is of considerable importance when applying the Daily Egg Production Method (DEPM) since it is used to estimate both spawning frequency (S) and batch fecundity (FB), provided that daily cohorts of POFs are discernible. Atlantic sardine (Sardina pilchardus) and Atlantic mackerel (Scomber scombrus), tw...

Maternal attributes may influence the quantity and quality of offspring and hence, their survival. We evaluated the seasonal variability in maternal effects on developing oocytes and larvae of European hake Merluccius merluccius from the southern stock. Females were collected in 10 different years between 1999 and 2017 in the 3 spawning seasons ide...

Detailed guide for otolith reading to determine age for stock assessment of blue whiting (Spanish version of ICES protocols)

Fisheries management has focused on optimizing yield and harvest while ensuring long-term sustainability. However, management has often pragmatically ignored the impact of fishing mortality on stock resilience and the synergetic effect of environmental forces in fitness and resilience, especially if regime shifts have occurred. European hake (Merlu...

The study of biology and population dynamics of fish species requires the estimation of fecundity in individual fish in a routine way in many fisheries laboratories. The traditional procedure used by fisheries research is to count the oocytes manually on a subsample of known weight of the ovary, and to measure few oocytes under a binocular microsco...

Study of follicular atresia occurrence and intensity in fish ovaries are key factors to estimate realized fecundity and hence stock reproductive potential. These structures are the consequence of a rapid degenerative process by which oocytes at different stages are lost from the ovary. They have been classified according to their resorption state i...

European hake (Merluccius merluccius) ovaries have been sampled regularly since 1999 until 2004. Since December 2002 with the Prestige oil spill weekly samples were collected in order to asses the potential impact of the fuel. Maturation proccess, fecundity, energetic reserves dynamic and atresia have been analyzed in females. Changes in the differ...

Potential and batch fecundity has been estimated in european hake (Merluccius merluccius) on Galician coast from 1999 to 2004. It is known that female fish proximate composition may act as determining factor in reproductive success and egg production. Energetic components (lipids, proteins and glycogen) of different body tissues (liver, muscle and...

Length at maturity may be used as an indicator parameter of fish stocks health and of their exploitation degree, since length at maturity decreases have been recorded in highly exploited fish populations. In this study, female maturity ogive has been estimated using histological analysis. A comparative analysis of size at maturity of European hake...

BACKGROUND: Spawning stock biomass (SSB) has been generally used as an indicator of spawning stock production but it is not exact because there are other factors like size, experience or condition that affect capacity of females to produce viable offspring that may eventually recruit to adult population or fishery. This ability is the Stock Reprodu...

Introduction Estimation of individual egg production is a key step to understand the relationship between stock and recruitment or to assess spawning stock biomass using egg production. Here we demonstrate a fecundity method that uses less toxic fixative and is less labour intensive whilst automating the work and improving the accuracy of populatio...

Spawning stock biomass (SSB) has been generally used as an indicator of spawning stock production but it is not exact because there are other factors like size, experience or condition that affect capacity of females to produce viable offspring that may eventually recruit to adult population or fishery. This ability is the Stock Reproductive Potent...

Estimation of fish stock reproductive potential has been of increasing importance in recent years. It involves the estimation of several key parameters in a routine basis, such as potential and/or batch fecundity, spawning fraction, atresia… To achieve this routinely it is highly recommended the use of methodologies that reduce time for estimation,...

A generalized simple bioenergetic model was used to estimate consumption of European hake in both north- and southern stocks for the period 1994-2008. Consumption in biomass was estimated from weight-at-age data and growth parameters and then converted to energy intake in kJ using the prey-preference by size in percentage obtained from stomach cont...

European hake is one of the most important economic resources for South European fleets. Currently it is considered an overexploited stock and consequently, UE has implemented a recovery plan whose main criteria for judging the status of the stock is the spawning stock biomass (SSB). Maturity data are the basic information to estimate SSB as well a...

Ponencia invitada en el seminario final del proyecto MERCAGAL. Dinámica xenética espazo-temporal das poboacións galegas de pescada europea

In the present study, 604 L. boscii females from the Galician Shelf and 204 L. whiffagonis females from the northern North Sea were sampled in the period 2007-2008 and 2011 respectively. L. boscii ranged from 13.6-39.7 cm total length while L. whiffagonis ranged from 30-55 cm. Oocyte density and mean diameter were estimated for both species to calc...

La invasión del pez león en el Atlántico occidental es alarmante no solo por ser la más rápida documentada sino porque amenaza con alterar la estructura y función de varios ecosistemas muy biodiversos como los del Mar Caribe. Parte del éxito del proceso invasivo del pez león (Pterois volitans) está relacionado con su eficiente estrategia reproducti...

Flemish Cap cod collapsed in early 90’s after facing multiple threats due to climate variability and anthropogenic pressures. This study try to disentangling the effect that these and other extrinsic factors (such us prey availability, density dependency and maturity) have on cod growth, analyzing 35-years of growth chronology reconstructed by usin...

The present study contributes to a better understanding of the daily spawning dynamics of southern NEA mackerel (Scomber scombrus) with implications for the estimation of batch fecundity. It shows that there is a time window during the day, mainly in the afternoon, during which the advanced oocyte mode in imminent spawners separates from the remain...

The autodiametric method is a highly streamlined method for estimating fecundity of fish with a determinate oocyte development pattern. Greenland halibut is a deepwater flatfish presenting a very peculiar reproductive strategy, with ovaries showing the simultaneous presence of both a cohort of large vitellogenic oocytes (developing for the current...

The analysis of microscopic images of fish gonad cells (oocytes) is a useful tool to estimate parameters of fish reproductive ecology and to analyze fish population dynamics. The study of oocyte dynamics is needed to understand ovary development and reproductive cycle of fish. Oocytes go through different developmental states in a continuum tempora...

To estimate productivity of a fish stock, the precise determination of fish fecundity is essential. The stereological method accurately estimates fecundity from histological images of a fish gonad. For that purpose, a hexagonal grid is overlaid on the histological image and the number of grid points associated to each oocyte (reproductive cells) ca...

A collection of 4770 histological slides collected in NAFO divisions 3LMN in a depth range from 200 to 1500 m and covering a time period between 2001 and 2015, has been reviewed to obtain information on reproductive biology of Macrourus berglax. Especial attention has been paid in atresia because its potential impact on stock productivity. Spatial...

The 3M redfish assessment is focused on the beaked redfish, regarded as a management unit composed of two populations from two very similar species: the Flemish Cap S. mentella and S. fasciatus. The reason for this approach is the historical dominance of this group in the 3M redfish commercial catch until 2005. However a new golden redfish fishery...

Govocitos is a multi-platform application designed to integrate all processes to estimate the fecundity of fish, a fundamental issue for the management of sustainable fisheries. Govocitos incorporates supervised and unsupervised algorithms to extract oocytes and their features in digitized histological images. Oocytes are classified automatically i...

Fecundity of redfish Sebastes mentella and Sebastes norvegicus in the Irminger Sea and Icelandic waters was analyzed in relation to several maternal features and oocyte developmental stages. The mean potential fecundity in S. norvegicus was estimated to be 123,300 oocytes and relative fecundity averaged 116 oocytes g–1. Mean potential fecundity in...

An Assessment of Beaked Redfish (S. mentella and S. fasciatus) in NAFO Division 3M (at times when natural mortality is driven stock dynamics and fishing mortality reference points are useless to scientific advice) Abstract The 3M redfish assessment is focused on the beaked redfish, regarded as a management unit composed of two populations from two...

The present chapter deals with the estimation of female fecundity in fishes, mostly teleosts. The chapter is organized in three main blocks. The first block is devoted to technical issues of fish fecundity measurements from fixation, preservation and treatment of ovarian material to automatic oocyte counts. The use of certain staining protocols for...

Energy allocation is an important component of life-history variation since it determines the tradeoff between growth and reproduction. In this study we investigated the state-dependent and sex-specific energy allocation pattern and the reproductive investment of a protogynous hermaphrodite fish with parental care. Individuals of Labrus bergylta, a...

The Machaca Brycon guatemalensis is a tropical freshwater fish widely distributed in Central America continental water, and recognized to have potentiality for further fisheries development and recreational fishing opportunities in the Lake Nicaragua. The species presents a protracted spawning season that last 8 months. Both small and large females...

The present chapter deals with the estimation of female fecundity in fishes, mostly teleosts. The chapter is organized in three main blocks. The first block is devoted to technical issues of fish fecundity measurements from fixation, preservation and treatment of ovarian material to automatic oocyte counts. The use of certain staining protocols for...

The 3M redfish assessment is focused on the beaked redfish, regarded as a management unit composed of two populations from two very similar species: the Flemish Cap S. mentella and S. fasciatus. The reason for this approach is the historical dominance of this group in the 3M redfish commercial catch until 2005. However a new golden redfish fishery...

The estimation of fecundity and reproductive cells (oocytes) development dynamic is essential for an accurate study of biology and population dynamics of fish species. This estimation can be developed using the stereometric method to analyse histological images of fish ovary. However, this method still requires specialised technicians and much time...

Spawning stock biomass (SSB) is one of the most common measures of stock status. However recent research on reproductive potential has shown that alternative variables may be an improvement over SSB. In the case of European hake (Merluccius merluccius), it is known that large individuals produce more eggs by unit of body weight, and their quality i...

For many fish populations reproductive patterns remain unknown, which often results in inadequate management strategies. Timing and intraspecific variability in the main reproductive traits of ballan wrasse (Labrus bergylta) were investigated based on microscopic analysis of gonads sampled from NW Spain in 2009-2012. This species displays two main...

Domínguez-Petit, R., Ouellet, P., and Lambert, Y. 2013. Reproductive strategy, egg characteristics and embryonic development of Greenland halibut (Reinhardtius hippoglossoides). – ICES Journal of Marine Science, 70: 342–351. Despite the commercial importance of Greenland halibut (GH), important gaps exist in our knowledge of the reproductive and ea...

In stock-recruitment relationships, spawning stock biomass (SSB) has traditionally been assumed to be equivalent to total egg production (TEP); however, in the last decade a number of studies have indicated the need to include more biological complexity in measures of reproductive potential and advocate the use of TEP instead of SSB. The relationsh...

In stock–recruitment relationships, spawning stock biomass (SSB) has traditionally been assumed to be equivalent to total egg production (TEP); however, in the last decade a number of studies have indicated the need to include more biological complexity in measures of reproductive potential and advocate the use of TEP instead of SSB. The relationsh...

Fish regulate egg production by atresia. Sometimes, oocytes are encapsulated in cystic structures that might remain in the ovary for months, altering female reproductive potential in future spawning seasons. Ovaries of Atlantic cod (Gadus morhua, L.) from the Flemish Cap and European hake (Merluccius merluccius, L.) from the Galician Shelf (NW Spai...

The usefulness and importance of histological techniques in reproductive studies have been widely discussed for gonochoristic fish species. In the case of hermaphroditic fishes, histology is a particularly important tool for the proper identification of sexual pattern (i.e., sequential, simultaneous, or nonfunctional hermaphroditism). We used a his...

Multiple comparison analysis of batch fecundity (BF) and spawning fraction (SF) of European hake (Merluccius merluccius L.) stocks was carried out over two different regions during a 2-year-period. Female specimens caught by commercial fishing vessels were sampled on a monthly basis during the main spawning season from January to June in the Bay of...

European hake is one of the most important economic resources for South European fleets; however, not many studies on its reproductive biology have been carried out. Gonadosomatic and hepatosomatic indices and condition factor were estimated. Proximate composition was analyzed in gonad, liver and muscle as indicators of female condition status; the...

In spite of the economic and ecological importance of hake and the depletion of the European stocks, studies about these species, especially about its reproductive potential, are almost nonexistent. In the present work the relationship between gonad development and female's physiological condition and energy reserves has been studied. Gonadosomatic...

Stock recruitment (SR) relationships aim to predict the recruitment based on a given level of reproductive stock. Though the spawning stock biomass (SSB) is commonly used to fit such SR models, there is increasing evidence that the total egg production (TEP) is a more relevant stock reproductive potential index. Indeed, the TEP takes into account b...

Stock recruitment (SR) relationships aim to predict the recruitment based on a given level of reproductive stock. Though the spawning stock biomass (SSB) is commonly used to fit such SR models, there is increasing evidence that the total egg production (TEP) is a more relevant stock reproductive potential index. Indeed, the TEP takes into account b...

Present study is focused in three demersal species from Galician Shelf with high commercial interest: four-spot megrim (Lepidorhombus boscii), pouting (Trisopterus luscus) and European hake (Merluccius merluccius). Studied area belongs to the Lusitanian ecoprovince (a transition zone between the Temperate North Atlantic and the Tropical Atlantic; S...

Maturity stage is a classification of fish gonads development. Maturity stage is use for to differentiate mature and immature individuals, and therefore for spawning stock biomass (SSB) calculation, spawning season definition, long-term changes in the spawning cycle monitoring, and many other research needs regarding the reproductive fish biology....

Estimation of individual egg production (realized fecundity) is a key step either to understand the stock and recruit relationship or to carry out fisheries-independent assessment of spawning stock biomass using egg production methods. Many fish are highly fecund and their ovaries may weigh over a kilogram; therefore the work time can be consuming...

Estimation of individual egg production (realized fecundity) is a key step either to understand the stock and recruit relationship or to carry out fisheries-independent assessment of spawning stock biomass using egg production methods. Many f ish are highly fecund and their ovaries may weigh over a kilogram; therefore the work time can be consuming...

Pouting, Trisopterus luscus is harvested commercially on the Galician shelf by the Spanish inshore artisanal fleet. In spite of a substantial decrease in pouting catches, fishery regulations are limited to size length restrictions. This study provides biological data including length-at-maturity based on histological methods, seasonal maturation, s...

European hake (Merluccius merluccius) female size at maturity is estimated on an annual basis for Bay of Biscay and Galician coast, which are parts of the distribution of the Northern and Southern stocks, respectively. Clear trends in this reproductive parameter are observed along the time series and the potential factors affecting these trends hav...

1 page.-- Published in: Comptes-Rendus / Proceedings "8th International Symposium on Reproductive Physiology of Fish (ISRPF)", Saint-Malo, France, 3-8 juin 2007, Équipe "Reproduction des Poissons" de l’INRA (éd). To assess annual fecundity accurately it is necessary to identify the reproductive strategy of the fish species under consideration. The...

2 pages, 3 figures.-- Published in: Comptes-Rendus / Proceedings "8th International Symposium on Reproductive Physiology of Fish (ISRPF)", Saint-Malo, France, 3-8 juin 2007, Équipe "Reproduction des Poissons" de l’INRA (éd). Larger hake females have both higher batch fecundity and numbers of developing oocytes, however this is influenced by externa...

Juvenile turbot Scophthalmus maximus were kept in captivity and were fed a prepared food contaminated with 5 levels of seawater-accommodated fuel oil, from 2.4 ± 0.35 to 48.2 ± 2.2 mg/g food. Oil that had been recovered from that released by the tanker 'Prestige' was used. Fish (n = 202) were individually tagged while length and weight were recorde...

The study of biology and population dynamics of fish species requires the routine estimation of fecundity in in-dividual fish in many fisheries laboratories. The traditional procedure used by fisheries research is to count the oocytes manually on a subsample of known weight of the ovary, and to measure few oocytes under a binocular microscope. This...

European Commission RASER project "Reproduction and stock evaluatin for Recovery" (Q5RS-2002-01825). Galicia Government Project XUGA-40201B98 Peer reviewed