• Abundancia relativa y distribución de tallas de corvina rubia Micropogonias furnieri y pescadilla de red Cynoscion striatus en la Zona Comun de Pesca Argentino-Uruguaya y en el Rincón. Noviembre, 1994.

      Carozza, C.R.; Cotrina, C.P. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero, 1998)
      The study aims to discriminate juvenile and adult concentration areas of white croacker Micropogonias furnieri and striped weakfish Cynoscion striatus in two different areas: Argentine-Uruguayan Common Fishing Zone (AUCFZ) and El Rincón (Buenos Aires Prov., Argentina). The length structure and the relative abundance of these two species were analyzed with data from a research cruise carried out by R/V Dr.E.L.Holmberg during November 1994. Data of relative abundance in t/nm2 were considered to define distribution and concentration areas. 49 samples of white croaker and 41 striped weakfish from AUCFZ a, inside the area of Río de la Plata and in front of Montevideo coast, at depths lesser than 8 meters, while the adults were located in the northern coast of Uruguay, at depths greater than 20 meters. The density of white croaker oscillated between 0.7 and 8 t/nm2 and juveniles were absent in El Rincón. The most important concentration area of striped weakfish extends from Punta del Este to El Chuy (AUCFZ), with densities from 16 to 97 t/mn2, corresponding to juveniles with bimodal length distribution. In El Rincón, the greater relative abundance was found in front of Bahía Blanca, where 65.3 corresponded to juveniles.
    • Abundancia relativa y rendimiento máximo sostenible de la merluza común (Merluccius hubbsi)

      Otero, H.O. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), 1980)
      The statistics provided by the Argentinean Fishing Vessel and the biological data collected by scientist in the last eleven years, allow us to estimate different aspects of the population dynamics of the common hake (Merluccius hubbsi). This work deals with the relative abundance and the maximal sustainable yield of this species, considering the bonaerense stock of the Southewest Atlantic. Analyzing the effective fishing density, concluding remarks can be made. The high catches of 1967 (more than 600.000 tons.)made by the Russian Fleet, affected the fishing density in 1968. Since 1969, the resource recovered the high density level as a consequence of a decrease in the catches and in the fishing effort, but vulnerability of the stock is shown.
    • Abundancia, reproducción y distribucion de tallas del gatuzo Mustelus schmitti en la Zona Comun de Pesca Argentino-Uruguaya y en el Rincón. Noviembre, 1994

      Cousseau, M.B.; Carozza, C.R.; Macchi, G.J. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero, 1998)
      Relative abundance, length distributions and reproductive condition of Mustelus schmitti are analyzed with samples obtained in the cruise H-13/94. Our results are compared with those obtained in other cruises. The samples were collected in the Argentine-Uruguayan Common Fishing Zone (AUCFZ) and El Rincón (Buenos Aires Prov., Argentina).
    • El aceite de pescado argentino y sus posibilidades de utilización en procesos industriales. Parte 1. Variación estacional de sus propiedades y composición en ácidos grasos

      Cuello, O.M.; Carrizo, J.C.R. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), 1986)
      As a result of preliminary works, it is possible to conclude that the argentine fish oils could be proper raw materials for the preparation of sulfated oils and another industrial products. In this work, the physicochemical properties and the fatty acid composition of twelve samples of fish oils were determined monthly during a year in order to evaluate their seasonal variations and the probable incidence on their potential applications.
    • El aceite de pescado argentino y sus posibilidades de utilización en procesos industriales. Parte II. Obtención de derivados sulfatados para la nutrición de cueros

      Carrizo, J.C.R.; Cuello, O.M. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), 1986)
      Twelve sulfated oils were prepared from Argentine's raw fish oils, and three more from samples previously bleached. The samples were taken montly during a year at a factory in the Mar del Plata (Argentine)zone. Each oil and its sulfated derivative was analyzed in its physico-chemical properties. The hydrophilic and hydrophobic fractions were separated and the fatty acids composition of the latter were determined. From the results obtained, it is possible to conclude that the Argentine's fish oils sulfated will be able to be used in fat-liquoring of leather.
    • Acerca del poder de pesca y capturabilidad en la pesquería de caballa (Scomber japonicus) de Mar del Plata

      Perrotta, R.G. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), 1988)
      Analyzed in this paper is the structure of the fleet applied to mackerel fishing based at Mar del Plata Port (38° LS); an attempt is also made at establishing the best system for measuring the fishing effort; the changes in catch capability (availability and vulnerability)are duly analyzed. Sampling vessels that allow greater data, particulary by in relation to the fishing effort, are available since the 1983/84 fishing season.
    • Acoustic surveys on the southern blue whiting (Micromesistius australis).

      Madirolas, A. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero, 1999)
      Two joint Argentine-British acoustic surveys specifically targeted on the southern blue whiting (Micromesistius australis) were carried out during September 1994 and 1995. The surveys confirmed the existence of a spawning concentration area located south from San Carlos Strait, in waters south of Malvinas Islands, ASW. The obtained point estimates of blue whiting abundance were 84801 t for the 1994 survey and 140953 t for the 1995 survey. The surveys also provided information on the school structure and behavior as well as some clues about the complex migration pattern of the species.
    • Actividad antimicrobiana de diferentes extractos obtenidos a partir de la vieira patagónica (Zygochlamys patagonica)

      Salomone, A.L. (2020)
      El uso excesivo de antibióticos en medicina, producción animal, agricultura y alimentos, ha contribuido a la aparición de patógenos resistentes a los antibióticos convencionales, haciendo necesaria la búsqueda de nuevos compuestos a partir de fuentes naturales y seguras. Ciertos péptidos de bajo peso molecular, con potencial actividad antimicrobiana, poseen alta especificidad para organismos procariotas y baja o nula toxicidad para los eucariotas. Los invertebrados marinos son una fuente posible para su obtención, ya que poseen un sistema inmune innato muy efectivo el cual es la primera línea de defensa frente a bacterias, hongos y virus. Una forma de obtenerlos es mediante la extracción con diferentes tipos de solventes que permiten mantener la función efectora de estas moléculas luego de su aislamiento. En este trabajo, a partir ejemplares de Zygochlamys patagonica se obtuvieron extractos con diferentes solventes y se compararon los rendimientos con el método control para la aislación de péptidos y proteínas. Se evaluó la concentración inhibitoria mínima (CIM) y la actividad antimicrobiana por medio de la determinación del porcentaje de inhibición del crecimiento de todos los extractos obtenidos sobre bacterias Gram positivas y Gram negativas, y se comparó su eficacia con un antibiótico comercial de amplio espectro. La CIM de los extractos provenientes de los tejidos de vieira (sin callos) fue de 2,5 mg ml-1, y la actividad antimicrobiana de los mismos fue comparable a la del antibiótico comercial de amplio espectro. De acuerdo con los resultados obtenidos, se recomienda utilizar etanol como método de extracción debido a su menor toxicidad y casi nula posibilidad de contaminación bacteriana durante el proceso. La identificación de estos péptidos podría contribuir a una futura aplicación biotecnológica.
    • Actividad reproductiva del salmón de mar (Pseudopercis semifasciata) en aguas costeras de la Provincia de Buenos Aires en el período 2012-2014.

      López, S.; Militelli, M.I. (2017)
      The reproductive activity of Argentine sandperch (Pseudopercis semifasciata) in the Buenos Aires Province coastal waters close to the Quequén/Necochea port, Buenos Aires, Argentine sea, was analyzed. The material derived from landing samplings performed by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) in the 2012-2014 period. The study of gonadal maturity stages allowed to determine that the species reproductive time in the area extends from August through February, with a marked increase of the gonadosomatic index and the presence of females in spawning activity or with postovulatory follicles, indicators of recent spawnings. Batch fecundity, that showed a positive relationship with the length and weight of ovary-free females, had a mean value of 93,483 hydrated oocytes. Relative fecundity varied between 18 and 51 oocytes per gram of ovary-free female and showed a negative linear relationship with length and weight. The dry weight and diameter of hydrated oocytes and the oily drop did not relate to the maternal characteristics in a significant way. The largest landings, that took place in March, September and October, showed that the last two months coincided with the time of the highest reproductive activity of the species.
    • Actualización de la estadística pesquera de peces demersales australes en el Atlántico sudoccidental (período 2003-2012)

      Gorini, F.L.; Giussi, A.R.; Wöhler, O.C. (2015)
      Updating of fishery statistics of austral demersal fishes in the Southwest Atlantic (2003-2012 period). The registries of catches of the different fleets that operated in austral demersal fisheries of the Southwest Atlantic between 34°S and 58°S during the 2003-2012 period were analyzed. The main species that integrate said ichthyic group are longtail hake or patagonian hoki (Macruronus magellanicus), southern blue whiting (Micromesistius australis), patagonian toothfish (Dissostichus eleginoides), red cod (Salilota australis), southern hake (Merluccius australis) and ling (Genypterus blacodes). Inconsistencies on the basic original information related to the common names used by fishermen or to the lack of distinction of species of the Merluccius Genus were corrected. Information about annual and monthly volumes caught, fishing grounds, number of vessels participating in the fisheries and landing ports is presented.
    • Age and growth of Whitemouth croaker (Micropogonias furnieri) larvae and juveniles.

      Braverman, M.; Brown, D.R.; Acha, E.M. (2017)
      With the aim of studying the age and daily growth of whitemouth croaker (Micropogonias furnieri) larvae and juveniles, the microstructure of sagittae otoliths of 122 individuals 3-25 mm standard or notochord length (SL or NL) size range and 7-92 days old was analyzed. Specimens derived from the turbidity front of the Río de la Plata area (Argentina) the main spawning zone of the species. Counting and measuring of the increments width along the otolith major radius were performed. The length-at-age data were fitted to the linear model (R2 = 0.875) and that of Laird-Gompertz (R2 = 0.881) with L0 = 2.44 and 2.76 mm, respectively, that represents the average length at hatch. With the Laird-Gompertz model an inflection point at 31 days and 10.23 mm SL was obtained. The instantaneous growth rates as a function of length showed a bell shape with an increment of 0.19-0.28 mm day-1 (27 mm SL asymptotic length). The growth rate derived from the linear model was 0.25 mm day-1. A linear relationship between the otolith major radius and length was found. The analysis of increments width as a function of age showed a trend similar to the one described in the Laird-Gompertz model.
    • Agua de lastre y especies exóticas

      Correa, N.; Almada, P.S. (2013)
      El agua que los navíos embarcan como lastre cuando deben atravesar el océano sin carga suele contener organismos vivos. Al ser descargada aquella, estos ingresan en un medio al que son ajenos y pueden convertirse en plagas y en muchos casos originan serios trastornos ambientales. Los organismos descargados son especies exóticas. Se muestra un estudio en 5 puertos argentinos (océano Atlántico sudoccidental), formas de mitigar los trastornos y el estado de la situación actual de la problemática, con lecturas sugeridas.
    • Algunas características biológicas de peces capturados en una campaña costera invernal en 1993, en el área comprendida entre 34° y 42° S (Atlántico Sudoccidental) y su relación con las condiciones ambientales.

      Díaz de Astarloa, J.M.; Carozza, C.R.; Guerrero, R.A.; Baldoni, A.G.; Cousseau, M.B. (1997)
      This paper deals with some biological features of fishes collected during a winter survey from northern Argentine-Uruguayan Common Fishing Zone (CFZ) to the south of El Rincon (Buenos Aires province, Argentina). A total of 167 fishing hauls with a bottom trawl net was carried out in the studied area. The main fishes considered were the following: whitemouth croaker (Micropogonias furnieri), stripped weakfish (Cynoscion striatus), Patagonian smoothhound (Mustelus schmitti), Brazilian flathead (Percophis brasiliensis), Argentine seabass (Acanthistius brasiliensis), flounders (Paralichthys orbignyanus, P. patagonicus) and (Xystreurys rasile), and angel shark (Squatina argentina). A total of 185 temperature and salinity profiles were made but only the latter were considered for the comparison of fishes abundance. The relation between the physical conditions and the distribution pattern of fishes showed that M. furnieri and P. orbignyanus were extreme eurihaline species while M. schmitti, P. patagonicus and S. argentina were eurihaline species with a low range of tolerance. P. brasiliensis, A. brasiliensis and X. rasile showed low tolerance to salinity variations.
    • Algunas características de la estructura y del comportamiento migratorio de los cardúmenes de caballa (Scomber japonicus marplatensis)en la plataforma bonaerense (Mar Argentino); período 1965-1984

      Cousseau, M.B.; Angelescu, V.A.; Perrotta, R.G. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), 1987)
      Three periods were distinguished during the analyzed years: the first one (1965-1975)may be defined as "normal fishing seasons" occurring from October to March, with catches between 8,000 and 14,000 tons.
    • Algunas características del florecimiento del fitoplancton en el frente del Río de la Plata. I. Los sistemas nutritivos

      Negri, R.M.; Carreto, J.I.; Benavides, H.R. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), 1986)
      During the spring (H-04/82: october 11-27, 1982)carried out by the Fishery Research Vessel "Dr.E.Holmberg", the distribution of temperature, salinity, nutrients concentration and photosynthetic pigments were studied at the "Rio de la Plata" maritime front. The presence of Sub-Tropical coastal waters in only station did not allow its characterization. Low Chlorophyll a concentration were noted, in association with scarce concentrations of nutrients and high Margalef index values.
    • Algunos aspectos de la biología pesquera del langostino (Pleoticus muelleri)de la Bahía Blanca y un análisis del desembarco comercial del período 1955-1979

      Bertuche, D.A.; Wyngaard, J.G. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), 1982)
      This study was carried out in order to get somme knowledge on the characteristics of the fisheries of the shrimp Pleoticus muelleri in the area of Bahia Blanca during 1980-1981. Monthly samplings in the fishing area were performed, and the landing data from 1955 to 1979 were analized.
    • Algunos resultados de las campañas primaverales de evaluación anual de anchoíta bonaerense efectuadas entre 1993 y 1996.

      Hansen, J.E.; Madirolas, A. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero, 1999)
      Information resulting from four spring acoustic surveys carried out between 1993 - 1996 to assess bonaerensis anchovy (Engraulis anchoita) biomass (34°- 41°30´S) is presented. Annual estimates, successively higher, went from 1.5 to 5.3 millon tons and the respective coefficient of variability that followed the same trend ranged between 7.4. and 28.0. . In general terms, the largest abundances were those recorded within the coastal strata off the Río de la Plata followed by those of the most southern stratum. Nevertheless, during the 1996 survey, the latter showed very high biomass values and, consequently, the largest mean. The region corresponding to the main commercial anchovy fishing ground during the season represented, in any case, relatively low percentages of the total biomass estimates. It is very unusual that anchovy spring distribution off the Buenos Aires Province (Argenmtina) extends to waters deeper than 80 m. Although small to medium size specimens were predominant in the most northern strata and the largest individuals were characteristic of the southern, coastal strata, a high interannual variability was found. The most numerous size classes comprised one year old individuals of 90-145 mm total length whereas biomass showed predominance of two year old and 135-180 mm anchovies. A very strong 1993 year class was found. Similar conditions apply to the 1995 year class (age 1 in 1996). Size-at-50. first maturity (L50. ) by cruise ranged between 92.5 - 101.8 mm total length for one year old specimen. The estimate derived from the pooled data was. L50. = 97.3 mm. The smallest sexually mature individuals were 75 mm long. The length (L, in milimeters) - weight (W, ingrams) relatinonship fitted for the whole period was as follows: W = 1.45 * 10-6 * L3.31. The von Bertalanffy length growth curve fitting by survey gave similar results. The equation corresponding to the available data was: Lt = 194.5 mm * {1 -exp [- 0.483 (t + 0.66)]}. The "catch curve" method used in each survey showed a wider variation in total mortality ratevalues (Z). However, except for the 1995 cruise, they all appeared to be consistent with previous estimations that ranged between 0.95 - 1.08. Fitting of the "mean catch curve" resulted in Z= 1.07. Natural mortality rates calculated with anindirect method (Pauly, 1980) ranged between M= 0.71 - 0. 93 (water temperature = 13°C) and between M= 0.78 - 1. 03(water temperature = 16°C). The interval corresponding to the pooled data was 0.88 ? M ? 0.97. There is not enough evidence to determine if the increase in anchovy biomass observed during those four years, due to strong year classes, can be attributed to favorable environmental conditions or if it is the consequence of the decrease in biomass of common hake and croaker, the two main anchovy predators. The fact that part of the anchovy stock might not have been in the area at the time of the surveys must also be taken into account.
    • Alimentación de la anchoíta argentina (Engraulis anchoita Hubbs y Marini, 1935)(Pisces: Clupeiformes) durante la época reproductiva.

      Pájaro, M. (Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata, 2002)
      Northern and southern populations of Engraulis anchoita spawn during spring and early summer in the coastal and intermediate shelf regions of the Argentine Sea between 34°S-41°S and 41°S-48°S respectively. Samples were obtained in 8 research surveys carried out during the spawning peak of the species. In both populations, more than 70. of the stomachs analyzed were empty or with scarce food. In plankton samples taken copepods predominated in the whole reproductive area. However, densities (41,000 individuals m-2)were lower than those found on the external shelf. Distribution and number of preys observed in the stomach content were associated to the distribution and abundance of plankton organisms. When comparing coastal and shelf regions it was noted that 77. of the total copepods ingested by both anchovy populations were depredated in the Patagonian area. Time spent on feeding ranged from 11-13 h, from 3.30-6.00 a.m. to 5.00 p.m., with an unclear peak around 4.00-5.00 p.m. This behaviour would be a consequence of the lower food density available in the reproductive habitat and the time schools spend on reproduction. The results imply that schools of E. anchoita are in a continuous search for food in the reproductive area, that they have short feeding migrations offshore and return to the coastal region to continue spawning.
    • Alimentación de la merluza (Merluccius hubbsi) en el Golfo San Jorge y aguas adyacentes

      Sánchez, F. (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero, 2009)
      The information obtained in summer research cruises carried out in 1995, 1999 and 2002 allowed to determine the trophic spectrum of common hake (Merluccius hubbsi) and to estimate anchovy (Engraulis anchoita) and hake consumption in the nursery area of the San Jorge Gulf and shelf adjacent waters (Argentine Sea, SW Atlantic). The area surveyed extended from 44ºS to 47ºS and between the 50-100 m isobaths. In the stomach content the most frequent items were crustaceans followed by fish. In all size groups sampled the presence of anchovy and common hake was observed. In the area assessed consumption of anchovy, weighted for the three summer months of 1995 was 56,639 t. The greatest predation pressure was observed on classes between 14-16 cm TL. Hake consumption estimated at 16,797 t in summer 1995 reached 36,456 t in 2002. The average length of common hake preys was 16 cm TL in 1995 and 13 cm TL in 2002.
    • Alimentación de la merluza en la región del talud continental argentino, época invernal (Merlucciidae, Merluccius merluccius hubbsi)

      Angelescu, V.A.; Cousseau, M.B. (1969)
      In the present paper the first results on the food and feeding habityas of hake in the region of the Argentinean continental slope are given. The data were obtained from the hake sampling made on board of the German research ship "Walther Herwig" during his first fishing exploratory trip in the Southwest Atlantic and from the investigation on the collected hake's stomachs.