Feasibility Analysis of South Bay Salt Pond Restoration, San Francisco Estuary, California

228pp. (pdf contains 257 pages)

Lista de los peces de la provincia de San Juan

Esta serie tiene como finalidad dar a conocer las especies presentes en los diferentes estados provinciales. Tomando como base los trabajos de López et al., (2003); Reis et al., (2003); Liotta (2006) y Ferraris (2007) hemos actualizado el elenco ictiofaunístico en cada territorio provincial, siguiendo la macrosistemática de Nelson (2006). No se realizan, con excepción del nombre vulgar y localidad tipo, comentarios ni observaciones sobre las especies señaladas ya que estos se encuentran en la bibliografía adjunta. Se incluyen dos tablas que contienen información sobre especies introducidas y de aquellas de presencia dudosa o que requieren confirmación en el territorio provincial. En este último caso se cita el trabajo que las menciona por primera vez. Consideramos que este modesto aporte contribuirá a precisar el conocimiento ictiofaunístico regional ya que además de la lista de especies, presentamos el marco biogeográfico e hídrico correspondiente. Por otra parte, entendemos que la participación de autores involucrados en la región considerada, le da un verdadero sentido federal a esta contribución, además de reforzar vínculos entre los protagonistas de nuestra especialidad. En este nuevo número, presentamos la provincia de San Juan que se encuentra enclavada en el centro-oeste de nuestro territorio, limitada por las provincias de La Rioja, Mendoza y San Luis. Se presenta por primera vez una lista exhaustiva de la ictiofauna de la provincia de San Juan basada en la revisión bibliográfica y de material de referencia de las colecciones Ictiológicas de la Universidad Nacional de San Juan y del Museo de La Plata. Se citan 21 especies, de las cuales 15 no habían sido mencionadas con anterioridad (Arratia et al., 1983; Murúa y Acosta, 1997; Liotta, 2006). Ocho especies han sido introducidas principalmente con fines deportivos. Se menciona la presencia de Percichthys chilensis, lo que constituiría el primer registro formal de esta especie ya que López-Arbarello (2004) la menciona para el Río Tunuyán (Mendoza), sin material de referencia.

Lista de peces de la provincia de Mendoza.

Esta serie tiene como finalidad dar a conocer las especies presentes en los diferentes estados provinciales. Tomando como base los trabajos de López et al. (2003), Reis et al. (2003), y Liotta (2006), mencionamos para cada territorio los cambios y novedades posteriores a estas publicaciones. Consideramos que este modesto aporte contribuirá a precisar el conocimiento ictiofaunístico regional, ya que, además de las listas de especies, adjuntamos bibliografía de referencia y el marco biogeográfico e hídrico correspondientes, que podrán ser de utilidad para quienes hagan uso de este trabajo. Por otra parte entendemos que la participación de autores involucrados en la región considerada, le da un verdadero sentido federal a esta contribución, además de reforzar vínculos en los protagonistas de nuestra especialidad. En este nuevo número presentamos la provincia de Mendoza que se encuentra limitada al norte por San Juan, al este por San Luis, al sur La Pampa y Neuquén y al oeste por Chile. A las 14 especies citadas por Liotta 2006 para la provincia de Mendoza debemos agregar nuevas citas de especies introducidas (Tabla I y II). Cabe destacar que un alto porcentaje de las 24 especies presentes en la provincia, un total de 11, se corresponde a especies introducidas tanto de origen exótico como autóctono.

Lista de peces de la provincia de San Luis.

Esta serie tiene como finalidad dar a conocer las especies presentes en los diferentes estados provinciales. Tomando como base los trabajos de López et al. (2003), Reis et al. (2003), y Liotta (2006), mencionamos para cada territorio los cambios y novedades posteriores a estas publicaciones. Consideramos que este modesto aporte contribuirá a precisar el conocimiento ictiofaunístico regional, ya que, además de las listas de especies, adjuntamos bibliografía de referencia y el marco biogeográfico e hídrico correspondientes, que podrán ser de utilidad para quienes hagan uso de este trabajo. Por otra parte entendemos que la participación de autores involucrados en la región considerada, le da un verdadero sentido federal a esta contribución, además de reforzar vínculos en los protagonistas de nuestra especialidad. En este nuevo número presentamos la provincia de San Luis que se encuentra limitada al norte por San Juan y La Rioja, al este por Córdoba, al oeste por Mendoza y al sur por la provincia de La Pampa. Si bien las especies potencialmente pueden ampliar su rango de distribución, ante cambios climáticos y/o modificaciones de cuencas, es importante considerar para futuros análisis, la acción generada por la antropocoria. Esta, muchas veces realizada de forma involuntaria por los propios pescadores, y en otras ocasiones, bajo responsabilidad de los organismos del estado han desvirtuado la distribución natural de varias especies, afectando tanto estudios zoogeográficos como las medidas dirigidas a la conservación y manejo de los recursos. A las 16 especies citadas por Liotta 2006 para la provincia debemos agregar nuevas citas de especies introducidas (Tabla I y II). Además consideramos que tanto Trichomycterus tenuis como Jenynsia obscura requieren ser confirmadas para la provincia ya que sólo se cuenta con un registro (Tabla III).

Summary of Precipitation and Streamflow for Potrero and San Clemente Creeks in Water-Year 2007, Santa Lucia Preserve, Monterey County, California

In March 2007 CSU-Monterey Bay began hydrologic monitoring of Santa Lucia Preserve for the Santa Lucia Conservancy. This project is a continuation of monitoring begun by Balance Hydrologics as part of the permit requirements for land development. The purpose of this annual report is to present data summaries for the 2007 water year (October 1, 2006 to September 31, 2007). Rainfall in water year 2007 was very low, representing the 15 year drought rainfall. Streamflow was relatively low as well as indicated by baseflow conditions approaching the drought conditions of water-year 1991 (Croyle and Smith, 2007). Document contains 30 pages)

Seasonal Growth of Waterhyacinth in the Sacramento/San Joaquin Delta, California

Waterhyacinth ( Eichhornia crassipes (Mart.) Solms), is a serious problem in the Sacramento/San Joaquin Delta, California. There is little published information on its phenology or seasonal growth in this system. Waterhyacinths were sampled at 2 to 3 week intervals from November, 1995 to July, 1997 and the following measurements were made on individual plants: dry weight, height, number of living leaves, number of dead leaves, and the width of the largest lamina. (PDF has 4 pages.)

Do tissue carbon and nitrogen limit population growth of weevils introduced to control waterhyacinth at a site in the Sacramento-San Joaquin Delta, California?

Waterhyacinth (Eichhornia crassipes(Mart.) Solms), is a serious problem in the Sacramento Delta. Two weevil species (Neochetina bruchi Hustache and N. eichhorniae Warner) have been introduced as biological control agents. The purpose of this study was to test the hypothesis that nitrogen (N) in the tissue of waterhyacinth was not sufficient to support weevil growth and reproduction. Because it grows better on plants with high N content and because it has a greater impact on the growth of high N plants, N. bruchi may be a more effective biological control agent in the Sacramento Delta.

Toxic pollutants, health indices and population dynamics of Harbor Seals in San Francisco Bay, 1989-1992

(PDF contains 300 pages)

Ictiología continental argentina: Santiago del Estero, Catamarca, Córdoba, San Luis, La Pampa y Buenos Aires.

Se presenta un compendio de la información disponible sobre la ictiofauna de parte de la región central de la Argentina y de la provincia de Buenos Aires, así como datos sobre aspectos hidrográficos e ictiogeográficos.

First Biennial Ocean Climate Summit: Finding Solutions for San Francisco Bay Area’s Coast and Ocean. Proceedings of the Summit: April 29, 2008, Golden Gate Club, The Presidio San Francisco, California

Executive Summary: The marine environment plays a critical role in the amount of carbon dioxide (CO2) that remains within Earth’s atmosphere, but has not received as much attention as the terrestrial environment when it comes to climate change discussions, programs, and plans for action. It is now apparent that the oceans have begun to reach a state of CO2 saturation, no longer maintaining the “steady-state” carbon cycle that existed prior to the Industrial Revolution. The increasing amount of CO2 present within the oceans and the atmosphere has an effect on climate and a cascading effect on the marine environment. Potential physical effects of climate change within the marine environment, including ocean acidification, changes in wind and upwelling regimes, increasing global sea surface temperatures, and sea level rise, can lead to dramatic, fundamental changes within marine and coastal ecosystems. Altered ecosystems can result in changing coastal economies through a reduction in marine ecosystem services such as commercial fish stocks and coastal tourism. Local impacts from climate change should be a front line issue for natural resource managers, but they often feel too overwhelmed by the magnitude of this issue to begin to take action. They may not feel they have the time, funding, or staff to take on a challenge as large as climate change and continue to not act as a result. Already, natural resource managers work to balance the needs of humans and the economy with ecosystem biodiversity and resilience. Responsible decisions are made each day that consider a wide variety of stakeholders, including community members, agencies, non-profit organizations, and business/industry. The issue of climate change must be approached as a collaborative effort, one that natural resource managers can facilitate by balancing human demands with healthy ecosystem function through research and monitoring, education and outreach, and policy reform. The Scientific Expert Group on Climate Change in their 2007 report titled, “Confronting Climate Change: Avoiding the Unmanageable and Managing the Unavoidable” charged governments around the world with developing strategies to “adapt to ongoing and future changes in climate change by integrating the implications of climate change into resource management and infrastructure development”. Resource managers must make future management decisions within an uncertain and changing climate based on both physical and biological ecosystem response to climate change and human perception of and response to the issue. Climate change is the biggest threat facing any protected area today and resource managers must lead the charge in addressing this threat. (PDF has 59 pages.)

Survey of fishes and water properties of south San Francisco Bay, California, 1973-82

The objective of this study was to describe the physical and ichthyological changes occurring seasonally and annually in the south San Francisco Bay, based on the results of 2,561 otter trawl and water samples obtained between February 1973 and June 1982. Temperature varied predictably among seasons in a pattern that varied little between years. Salinity also underwent predictable seasonal changes but the pattern varied substantially between years. The most abundant species of fish were northern anchovy (Engraulis mordax), English sole (Parophrys vetulus), and shiner surfperch (Cymatogaster aggregata). The majority of the common fish species were most abundant during wet years and least abundant in dry years. Numeric diversity was highest during the spring and early summer, with no detectable interannual trends. Species composition changed extensively between seasons and between years, particularly years with extremely high or extremely low freshwater inflows. All the common species exhibited clustered spatial distributions. Such spatial clustering could affect the interpretation of data from estuarine sampling programs. Gobies (Family Gobiidae) were more abundant during flood tides than during ebb tides. English sole were significantly more abundant in shallower areas. Shiner surfperch showed significant differences in abundance between sample areas.(PDF file contains 28 pages.)

Analysis of fish diversion efficiency and survivorship in the fish return system at San Onofre Nuclear Generating Station

This study examined the efficiency of fish diversion and survivorship of diverted fishes in the San Onofre Nuclear Generating Station Fish Return System in 1984 and 1985. Generally, fishes were diverted back to the ocean with high frequency, particularly in 1984. Most species were diverted at rates of 80% or more. Over 90% of the most abundant species, Engraulis mordax, were diverted. The system worked particularly well for strong-swimming forms such as Paralobrax clothratus, Atherinopsis californiensis, and Xenistius californiensis, and did not appreciably divert weaker-swimming species such as Porichthys notatus, Heterostichus rostratus, and Syngnathus sp. Return rates of some species were not as high in 1985 as in 1984. Individuals of most tested species survived both transit through the fish return system and 96 hours in a holding net. Some species, such as E. mordox, X. californiensis, and Umbrina roncador, experienced tittle or no mortality. Survivorship of Seriphus politus was highly variable and no Anchoa delicatissima survived. (PDF file contains 22 pages.)

Prevalence, intensity, longevity, and persistence of Anisakis sp. larvae and Lacistorhynchus tenuis metacestodes in San Francisco striped bass

Thirteen hundred and seventy-three striped bass, Marone saxatilis, were collected from the San Francisco Bay-Delta area to correlate host diet with parasitic infections and to determine the prevalence, intensity, longevity, and persistence of larval Anisakis sp. nematodes and the metacestode Lacistorhynchus tenuis. There is an increase in the prevalence and intensity of Anisakis sp. and in the intensity of L. tenuis with increase of age of the host. These increases are probably related to the diet and the persistence of tbe parasites. The infections of both species are overdispersed. San Francisco Bay striped bass are an incompatible host for both species of parasites. Degenerated Anisakis sp. will remain in lhe host for at least 8 months and L. tenuis metacestodes for 22 months. The occurrence of several other species of parasites and a tumor are also reported. (PDF file contains 10 pages.)