Rosario Domínguez-Petit

Instituto Español de Oceanografia | IEO · Centro Oceanográfico de Vigo

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...