Population parameters of the sea urchin Arbacia dufresnii (Blainville, 1825) from North Patagonian gulfs invaded by kelp Undaria pinnatifida (Harvey) Suringar, 1873

Undaria pinnatifida, es un alga que ha invadido la costa de Argentina hace más de 20 años y presenta diferentes tiempos de invasión en distintos sitios. Dado que los erizos de mar son herbívoros generalistas que suelen tener un rol relevante en la resistencia a la invasión de algas, y que Arbacia dufresnii es el erizo de mar más abundante en las zonas costeras del norte de la Patagonia, el objetivo de esta trabajo fue relacionar parámetros poblacionales de este equinoideo con la presencia del alga invasora. Durante el año 2012 se realizaron muestreos en diferentes momentos del año, de acuerdo al ciclo de vida del alga, en sitios con una invasión avanzada de U. pinnatifida (Golfo Nuevo), invadidos recientemente (Golfo San José, Punta Tehuelche) y un sitio no invadido (Golfo San José, Zona 39). Los sitios invadidos por U. pinnatifida presentaron mayor densidad del erizo de mar respecto de las zonas desprovistas del alga invasora. A su vez, la densidad de A. dufresnii varió con el ciclo de vida del alga. Esto fue acompañado por variaciones en la distribución de tallas. De esta forma, bajo la hipótesis de que disponibilidad de alimento influencia el tamaño corporal y en la densidad poblacional de los erizos de mar, los cambios comunitarios producidos por la formación de las praderas estacionales de U. pinnatifida y la posibilidad de que sea nueva fuente de alimento estacional para el erizo mar, afectarían los parámetros poblacionales de A. dufresnii. A su vez, la superficie proporcionada por el alga invasora en determinadas épocas del año permitiría el asentamiento o protección a los reclutas del equinoideo.The Asian seaweed Undaria pinnatifida invaded Argentina in 1992 (Golfo Nuevo, Patagonia). Its range has expanded and it has changed the native benthic community. Sea urchins are usually generalist herbivores that have a key role in controlling seaweeds. Arbacia dufresnii is the most abundant sea urchin in the coastal areas of northern Patagonia. The aim of this study was to relate the population parameters of A. dufresnii to the presence of the invasive seaweed. In 2012 we sampled sites with different invasion stages (advanced: Golfo Nuevo, recently invaded: San José Gulf, Punta Tehuelche; no invasion: San José Gulf, Zona 39). Sea urchin density was higher in the invaded sites and varied with the seaweed cycle. In addition, there were variations in the size distribution in the invaded sites. The invasive algae probably affects urchin populations because it is a new source of food that changes environmental structure (it provides microhabitat for new recruits) and affects the native benthic community.Fil: Epherra, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Diversidad y Evolución Austral; ArgentinaFil: Martelli, Antonela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Morsan, Enrique Mario. Universidad Nacional del Comahue. Instituto de Biología Marina y Pesquera Almirante Storni; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rubilar Panasiuk, Cynthia Tamara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Universidad Nacional de la Patagonia; Argentin

Sex and reproductive cycle affect lipid and fatty acid profiles of gonads of Arbacia dufresnii (Echinodermata: Echinoidea)

Analysis of the lipid composition of gonads allows differentiation between energy and structural lipids, which is important for understanding lipid utilization during gametogenesis. Fatty acids, which are frequently used as biomarkers in trophic ecology studies, are also a useful companion to lipid studies and provide a detailed understanding of a species' reproductive cycle. We examined the influence of sex and the reproductive cycle on the lipid and fatty acid profiles of gonads in the sea urchin Arbacia dufresnii. In a population from Nuevo Gulf, Argentina, we found significant changes in total lipid concentration, lipid profile and fatty acid profile throughout the reproductive cycle. Ovaries and testes containing fully mature gametes differed in total lipid concentration (higher in the ovaries), lipid profile (more energy lipids in ovaries and more structural lipids in testes) and fatty acid profile (differed by sex, not only in the variety of fatty acids present but in the degree of unsaturation). Our results show that differences in lipid and fatty acid profiles caused by sex and gonadal reproductive stage need to be considered when these tools are used as biomarkers in ecological studies.Fil: Zárate, Erica. The University of Auckland; Nueva ZelandaFil: Díaz de Vivar, María Enriqueta Adela. Universidad Nacional de la Patagonia; ArgentinaFil: Avaro, Marisa Gladis. Universidad Nacional de la Patagonia; ArgentinaFil: Epherra, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Sewell, Mary A.. The University of Auckland; Nueva Zeland

Phenotypic variation of sea urchin Eucidaris tribuloides (Cidaroida: Cidaridae) along the Reef Corridor of the Southwest Gulf of Mexico

Introduction: Intraspecific morphological variation can be attributed to the result of genetic variation or influence of environmental heterogeneity. In the latter case, organ­isms are exposed to diverse environmental conditions which have an influence on their biological processes and can be seen reflected in the morphological adaptations of species. Indeed, Reef Corridor in the Southwest Gulf of Mexico (CASGM, in its Spanish acronym) is constituted of geographically separated reefs that are exposed to different large-scale oceanographic factors and show their own attributes with multiple environmental variables. Therefore, this can stimulate morphological variations of species populations that are distributed in this corridor. Objective: The aim of this study was to determine the morphological variation of the Aristotle’s lantern of the sea urchin Eucidaris tribuloides along CASGM. Methods: The allometric relation between height of the Aristotle’s lantern and diameter of the test of 104 specimens was analyzed, and we also used a covariance analysis to detect allometric differences between groups. Apart from that, the variation of the shape of a rotule and a demi-pyramid for each sea urchin were analyzed using geometric morphometry. Results: There are allometric differences among reef systems in the north, center and south of Veracruz. The shape of rotula and demi-pyramid of sea urchins of the north zone are different from the central and south area. However, there were no differences in shape between the center and the South area. The centroid size of rotula and demi-pyramid of the sea urchins of the North are larger than those in the center and the South. Conclusions: Along the Corridor of the Southwest of the Gulf of Mexico, specimens of E. tribuloides showed a morphological variation in their ana­lyzed structures, these results can be explained by the geographical and environmental gradients of the CASGM, in addition to the feeding habits of E. tribuloides and the availability of the food resource in the habitat where they are established. As a stimulus to the morphological variation found in this research, the distance among the reef systems and the marine currents patterns are also considered.Fil: Escarcega Quiroga, Pastor. Universidad Veracruzana; MéxicoFil: Granados Barba, Alejandro. Universidad Veracruzana; MéxicoFil: Gonzalez Gandara, Carlos. Universidad Veracruzana; MéxicoFil: Epherra, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Diversidad y Evolución Austral; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Puerto Madryn. Instituto Patagónico del Mar; ArgentinaFil: Marin-Hernandez, Mark. Universidad Veracruzana; MéxicoFil: Crespi-Abril, Augusto César. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Puerto Madryn. Instituto Patagónico del Mar; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentin

Crecimiento del erizo verde Arbacia dufresnii alimentado artificialmente en condiciones de laboratorio

Los erizos de mar en condiciones de baja disponibilidad de alimento realizan una alocación diferencial de recursos, generalmente disminuyendo el crecimiento somático. Arbacia dufresnii es el erizo de mar más abundante en el Golfo Nuevo y se asume se encuentra en un ambiente con disponibilidad de recursos alimentarios limitados. Con el objeto de corroborar la hipótesis que en condiciones de alimento ad libitum hay tanto crecimiento somático como gonadal se analizó el crecimiento en diámetro y peso de A. dufresnii alimentados artificialmente en condiciones de laboratorio.Fil: Deías Spreng, Julia. Universidad Nacional de la Patagonia. Facultad de Ciencias Naturales. Sede Puerto Madryn; ArgentinaFil: Epherra, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Diversidad y Evolución Austral; ArgentinaFil: Rubilar Panasiuk, Cynthia Tamara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina6ta Jornada de Presentación de BecariosPuerto MadrynArgentinaCentro Nacional Patagónic

Communautés subtidales macrobenthiques de la Patagonie du Nord: Accent sur les changements des populations d’échinodermes

The study of benthic communities comprises a valuable resource which can be applied in securinghigh quality environmental knowledge and data. Benthic communities in the Northwest of San Matías Gulf have been studied as the by-catch of commercial fisheries. The phylum Echinodermata is usually found to be a dominant group within these communities, but its diversity and distribution have not been studied in the NW of the San Matías Gulf. The phyla Echinodermata, Mollusca, and Arthropoda were recorded as the main taxa within the El Sótano and Bajo Oliveira benthic communities in both years of study (2011 and 2014). Significant differences were observed between the two years, mainly as regards the number of species (S). Seven species of echinoderms were recorded, and the spatial distribution of the species was patchy, indicating varying degrees of distribution. The size distribution of all species of echinoderms was multi-modal. The observed changes in the two years in the benthic communities analyzed in this study may be a result of natural causes, rather than anthropogenic causes.L’étude des communautés benthiques constitue une ressource précieuse qui peut être utilisée pour obtenir des connaissances et des données environnementales de haute qualité. Les communautés benthiques du Nord-Ouest du golfe de San Matías ont été étudiées en tant que prises accessoires de la pêche commerciale. Le phylum des Echinodermes est généralement considéré comme un groupe dominant au sein de ces communautés, mais sa diversité et sa distribution n’ont pas été étudiées à ce jour dans le NordOuest du golfe de San Matías. Les phylums des Echinodermes, des Mollusques, et des Arthropodes ont été enregistrés comme les principaux taxons au sein des communautés benthiques d’El Sótano et Bajo Oliveira au cours des deux années d’étude (2011 et 2014). Des différences significatives ont été observées entre les deux années, principalement en ce qui concerne le nombre d’espèces (S). Sept espèces d’échinodermes ont été enregistrées, et la distribution spatiale des espèces était parcellaire, indiquant des degrés de distribution variables. La distribution des tailles des espèces d’échinodermes est multimodale. Les changements observés au cours des deux années dans les communautés benthiques analysées dans cette étude peuvent être le résultat de causes naturelles, plutôt que de causes anthropiques.Fil: Lazari, Carolina. Universidad Nacional del Comahue. Escuela de Ciencias Marinas; Argentina. University of California; Estados UnidosFil: Epherra, Lucía. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Morsan, Enrique Mario. Universidad Nacional del Comahue. Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos "Almirante Storni". - Provincia de Río Negro. Ministerio de Agricultura, Ganadería y Pesca. Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos "Almirante Storni". Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Centro Nacional Patagónico. Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos "Almirante Storni"; Argentina. Universidad Nacional del Comahue. Escuela de Ciencias Marinas; ArgentinaFil: Rubilar Panasiuk, Cynthia Tamara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Puerto Madryn. Instituto Patagónico del Mar; Argentin

Reproductive biology and energetics of the brooding sea star anasterias antarctica (Echinodermata: Asteroidea) in the beagle channel, Tierra del Fuego, Argentina

The brooding sea star Anasterias antarctica is distributed from the coast of Patagonia to the northern Peninsula of Antarctica. In the Beagle Channel, the females of A. antarctica brood their eggs for seven months and do not feed during this period. The endoparasite Dendrogaster argentinensis (Crustacea: Ascothoracica) causes castration in several species of Anasterias. We randomly collected four samplings of adults in May, August and October (brooding period) and January (non-brooding period). The gonad (GI) and pyloric caeca index (PCI) were calculated as organ wet weight (g) x 100/total wet weight (g). Each individual was sexed by microscopic examination of the gonads. Sex ratio, brooding females/non-brooding females and mature females/ non-mature females ratios was 1:1. The male GI reached maximum values in January, when most individuals were sexually mature. The GI of non-brooding females reached its maximum during October when it was significantly higher than those from brooding females. The PCI was minimum in October, being lower in brooding females (August and October). During the non-brooding period, mature females had a significantly higher GI than non-mature females. The PCI did not vary neither between males, nor between mature and non mature females. By the end of the brooding period, non-brooding females showed a higher GI than the brooding females. This is explained by proliferation and increase of the oocytes size of non-brooding females. Mature females showed an incremented GI with presence of mature oocytes, while non-mature females exhibited more abundance of previtelogenic oocytes. Males showed synchronicity in reproductive condition. The females that have not brooded presented a process of active gametogenesis, reaching the summer with a high GI, therefore becoming mature females. Females that had brooded were probably lacking energy for new gonadal maturation. The pyloric caeca would be performing the role of a reserve organ in the brooding females, decreasing its size during the brooding period. Prevalence of D. argentinensis in A. antarctica was 11.06%. As this parasite was recorded in sea stars lacking gonads, these infected hosts could have been castrated.Fil: Pérez, Analía Fernanda. Universidad Maimónides. Área de Investigaciones Biomédicas y Biotecnológicas. Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y de Diagnóstico; ArgentinaFil: Fraysse, Cintia Pamela. Universidad Maimónides. Área de Investigaciones Biomédicas y Biotecnológicas. Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y de Diagnóstico; ArgentinaFil: Boy, Claudia Clementina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Epherra, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Diversidad y Evolución Austral; ArgentinaFil: Calcagno, Javier Ángel. Universidad Maimónides. Área de Investigaciones Biomédicas y Biotecnológicas. Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y de Diagnóstico; Argentin

Plásticidad morfológica en la linterna de Aristoteles en Arbacia dufresnii (Phymosomatoida: Arbaciidae) en la costa Patagónica.

The relative size of the Aristotle’s lantern of most sea urchins varies in relation to the food availability and it is often used to infer the availability of food of the environment. The aim of our study was to evaluate the lantern morphology plasticity of Arbacia dufresnii in populations with different environmental characteristics, either mussel beds or disturbed areas, by the invasive alga Undaria pinnatifida along the Patagonian Atlantic coast. The test diameter of the sea urchins along with the weight and height of the lanterns, the jaw lenght and rotula lenght were measured. Classic and geometric morphometric analyses were performed to test differences among populations. The length of the jaw was the best indicator of relative changes in size of the lantern. The largest length of the jaw was measured in individuals from disturbed areas dominated by the invasive algae U. pinnatifida. The rotula shape changed with the increase of the diameter of the sea urchins, it tends to be more elongated with larger sea urchins.   El tamaño relativo de la linterna de Aristóteles en la mayoría de las especies de erizos de mar varía en relación con la disponibilidad de alimentos y se utiliza a menudo para inferir la disponibilidad de alimentos en el medio ambiente en que los erizos de mar habitan. El objetivo de este estudio fue evaluar la plasticidad morfológica de la linterna de Aristóteles de Arbacia dufresnii en poblaciones con diferentes características ambientales, ya sean con bancos de mejillones o áreas modificadas por el alga invasora Undaria pinnatífida, a largo de la costa patagónica atlántica. Se midió el diámetro del caparazón, el peso y el alto de las linternas, la longitud de la semipirámide y la longitud de la rótula. Los datos se analizaron utilizando técnicas de morfometría clásica y geométrica con el objetivo de probar diferencias entre las poblaciones. La longitud de la semipirámide fue el mejor indicador para describir los cambios relativos en el tamaño de la linterna. La mayor longitud de la semipirámide se observó en las poblaciones que habitan áreas dominadas por el alga invasora U. pinnatifida. La forma de la semipirámide no varía entre las poblaciones ni con el tamaño de los erizos de mar, mientras que la forma de la rótula cambia en relación al tamaño de los erizos, siendo más alargada cuando el tamaño de los individuos es mayor. 

Nutrient allocation in the gonads of the sea urchin Arbacia dufresnii in different stages of gonadal development

This study reports nutrient allocation in different stages of gonadal development for two populations of the sea urchin Arbacia dufresnii off the Patagonian coast of Argentina (Nuevo Gulf and San Jorge Gulf). The biochemical composition of gonads was used to assess nutrient allocation by measuring ash, soluble protein, lipid and trichloroacetic acid-soluble carbohydrate concentrations, and absolute contents over a 24-month period. Reproductive output in terms of energy was calculated for females. Results were correlated with histological stage of the gonads. Soluble proteins were the main component for the Nuevo Gulf population while unmeasured organic material (i.e. insoluble proteins and nucleic acids, especially in testes) was prevalent in gonads from San Jorge Gulf. Soluble protein and lipid concentrations followed the gonadal cycle, while carbohydrate concentration was almost negligible, especially in the Nuevo Gulf population. The different patterns in the gonadal cycle in the two populations were reflected in the biochemical composition of gonads. Concentrations and contents of the biochemical components and reproductive output were higher in the population from San Jorge Gulf owing to the larger size of gonads and gametes. These findings contribute to the better understanding of the plasticity of the reproductive biology of A. dufresnii in different environments.Fil: Parra, Micaela. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Rubilar, Tamara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Latorre, Maité. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Epherra, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Gil, Damián. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Comodoro; ArgentinaFil: Díaz de Vivar, María Enriqueta. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentin

Changes in the diet of the native sea urchin Arbacia dufresnii at different scenarios of the Undaria pinnatifida invasion (Patagonia, Argentina)

Undaria pinnatifida is one of the most successful marine invasive species worldwide. Since its first detection in Nuevo Gulf (Argentina), changes in the species richness and diversity of native algae and macrofauna have been reported. Knowledge of the invasive alga-native grazer interaction is key to better understand ecosystem dynamics and the potential effects of Undaria on local food webs. The aim of this study was to compare the diet of the sea urchin Arbacia dufresnii, among different scenarios of invasion of Undaria in two northern Patagonian gulfs. To this end, we determined the relative contribution of kelp to the diet of the sea urchin by comparing the gut content and stable isotopes in different tissues of A. dufresnii from sites where the invasion of Undaria was advanced, relatively recent, or not recorded. Because A. dufresnii has a plastic feeding habit and Undaria represents a high input of algal biomass, our hypothesis was that A. dufresnii feeds on Undaria and that the contribution of the invasive kelp to the diet of the sea urchin will be greater according to the time elapsed since invasion. Our results confirmed that A. dufresnii fed on Undaria and assimilated in gonads and muscle. The contribution of Undaria to the sea urchin diet was related to the stage of invasion. In the site with an advanced stage of invasion, A. dufresnii consumed the kelp both in spring and summer, when sporophytes were mature and senescent, respectively. However, in the recently invaded site, A. dufresnii consumed Undaria only in summer, when the kelp was senescent. Arbacia dufresnii is an omnivore species with the plasticity to adapt its diet to a variety of resources depending on the availability in the environment, prioritizing faunal items. This work reinforces the importance of complementing gut analysis with stable isotope analysis to determine the contribution of items in the diet. Although the impacts of an invasive alga on food webs and ecosystem structure are difficult to evaluate, performing these analyses in different scenarios may allow better understanding the local food web structure and assessing the possible ecological consequences over the invaded habitat.Fil: Castro, Karen Lidia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; ArgentinaFil: Epherra, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Raffo, María Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Morsan, Enrique Mario. Universidad Nacional del Comahue. Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos "Almirante Storni". - Provincia de Río Negro. Ministerio de Agricultura, Ganadería y Pesca. Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos "Almirante Storni". Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Centro Nacional Patagónico. Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos "Almirante Storni"; ArgentinaFil: Rubilar Panasiuk, Cynthia Tamara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Puerto Madryn. Instituto Patagónico del Mar; Argentin

Embryonic and larval development is conditioned by water temperature and maternal origin of eggs in the sea urchin Arbacia dufresnii (Echinodermata: Echinoidea)

Introduction: Embryonic and larval development in sea urchins is highly dependent on maternal nutritionalstatus and on the environmental conditions of the seawater. Objective: To compare the development of Arbaciadufresnii in two different water temperatures and in progeny with varying maternal origins. Methods: Weinduced A. dufresnii females and males from Nuevo Gulf to spawn, collected the eggs of each female individually(progeny), separated them into two seawater temperatures (12 and 17 °C), and fertilized them. We recordedthe percentage of fertilized eggs and embryos per developmental stage according to time, temperature andprogeny. We measured larval growth by total length (TL) and midline body length (M) according to time postfecundation (DPF), temperature, and progeny. Results: Temperature did not affect fertilization, but embryodevelopment was faster and more synchronized in the high temperature treatment. The generalized linear modelsindicate that embryo development depends on a quadruple interaction between the embryonic stage, time (h),seawater temperature and progeny. Larval growth was faster, producing larger larvae at the highest temperature.Larval growth depends on a triple interaction between time (DPF), seawater temperature and progeny.Conclusions: We found a temperature and progeny impact during embryonic and larval development and, inboth cases, these factors generate a synergistic effect on developmental timing and larval size. This probablyprovides a survival advantage as a more rapid speed of development implies a decrease in the time spent in thewater column, where the sea urchins are vulnerable to biotic and abiotic stressors.Fil: Fernandez, Jimena Pía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Chaar, Florencia Belén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Epherra, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Gonzalez Aravena, Jorge Marcelo. Instituto Antartico Chileno; ChileFil: Rubilar Panasiuk, Cynthia Tamara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentin