(Report of the) Institute of Marine Biology and Oceanography, Fourah Bay College, University of Sierra Leone

Details are given of the Institute and its activities, in particular the research projects being undertaken. These include studies on the marine molluscs of Sierra Leone, the cockle fishery, a preliminary investigation on the fouling organisms affecting the raft-cultured oyster populations, larval oyster ecology in relation to oyster culture, preliminary studies on the reproductive cycle of the mangrove oyster (Crassostrea tulipa), and catch composition of fishes taken by beach-seines at Lumley (Freetown). Records of the west African manatee (Trichechus senegalensis) are noted.

Nitrification in marine ecosystems [Translation from: Rapp.Naturvardsverket SNVPM No.1213, 157-166, 1980]

The nitrification in the ocean is influenced by several environmental factors and the importance of these is more or less known. There are very likely many more to be discovered in the study of the interaction of nitrification bacteria and other micro-organisms in the ocean. Some of the factors to be considered will briefly be dealt with in this paper. Then the authors give the results of an incubation experiment in the Baltic Sea and from a detailed study in Gullmarn.

The Marine Science Library, Resource Center : poster presentation

The first concept of a new library was introduced in 2001 by a faculty member at the University of Texas Marine Science Institute. The suggestion for the construction of a new library was based on two specific reasons: existing library is located in one of the most vulnerable buildings to hurricane damage and the library has outgrown its current space. This presentation provides a general overview of the current status and changing needs of the Marine Science Library and how the idea of a new library finally became a reality

The marine extension - the great fire

From a special issue: A Brief History of the Charles Darwin Foundation for the Galapagos Islands 1959-1988

Marine biology of the Sierra Leone River Estuary. 1. The physical environment

The Sierra Leone River Estuary is a relatively young drowned river valley, it is shallow except for a deep channel which passes close to the Freetown shoreline. The upper reaches merge into a network of creeks and channels fringed by large areas of mangrove swamps. It is a tidal estuary of the semi-mixed type with the saline oceanic water entering it on a diurnal cycle. The climate of Sierra Leone is marked by a very distinct change between a very wet rainy season and a dry season. The tidal range of the Estuary (spring 3.03m; neap 2.28m) does not impede normal use of the harbour. The tidal variations can be felt as far as 42 miles inland along the water courses of the Sierra Leone River and its tributaries. The volume of fresh water entering the Estuary is large during the rainy season and greatly reduced during the dry season. Consequently there is a marked fall in salinity during the rainy season and higher salinities due to the marine influence prevailing during the dry season. The nature of the shores and bottom, the hydrography and chemistry of the estuarine system have been outlined in relation to the prevailing climatic conditions.

Hypoxic and low pH water in the nearshore marine environments of Monterey Bay, California: characterizing a decade of oxygen and pH, and drivers of variability.

A decade-long time series recorded in southern Monterey Bay, California demonstrates that the shallow, near-shore environment (17 m depth) is regularly inundated with pulses of cold, hypoxic and low pH water. During these episodes, oxygen can drop to biologically threatening levels, and pH levels were lower than expected. Weekly water chemistry monitoring revealed that the saturation state of aragonite (the more soluble form of calcium carbonate) was often below saturation and had a moderate positive relationship with pH, however, analytical and human error could be high. Pulses of hypoxia and low pH water with the greatest intensity arise at the onset of the spring upwelling season, and fluctuations are strongly semidurnal (tidal) and diurnal. Arrival of cold, hypoxic water on the inner shelf typically occurs 3 days after the arrival of a strong upwelling event and appears to be driven by upwelling modulated by internal tidal fluctuations. I found no relationship between the timing of low-oxygen events and the diel solar cycle nor with terrestrial nutrient input. These observations are consistent with advection of hypoxic water from the deep, offshore environment where water masses experience a general decline of temperature, oxygen and pH with depth, and inconsistent with biochemical forcing. Comparisons with concurrent temperature and oxygen time series taken ~20 km away at the head of the Monterey Canyon show similar patterns but even more intense hypoxic events due to stronger semidiurnal forcing there. Analysis of the durations of exposure to low oxygen levels establishes a framework for assessing the ecological relevance of these events. Increasing oceanic hypoxia and acidification of both surface and deep waters may increase the number, intensity, duration and spatial extent of future intrusions along the Pacific coast. Evaluation of the resiliency of nearshore ecosystems such as kelp forests, rocky reefs and sandy habitats, will require consideration of these events.

Evaluation of marine phytoplankton toxicity by application of marine invertebrate bioassays

The dinoflagellate Alexandrium minutum and the haptophyte Prymnesium parvum are well known for their toxin production and negative effects in marine coastal environments. A. minutum produces toxins which cause paralytic shellfish poisoning in humans and can affect copepods, shellfish and other marine organisms. Toxins of P. parvum are associated with massive fish mortalities resulting in negative impacts on the marine ecosystem and large economic losses in commercial aquaculture. The aim of this work is to improve our knowledge about the reliability of the use of marine invertebrate bioassays to detect microalgae toxicity, by performing: (i) a 24- to 48-h test with the brine shrimp Artemia franciscana; (ii) a 48-hour embryo-larval toxicity test with the sea urchin Paracentrotus lividus; and (iii) a 72-h test with the amphipod Corophium multisetosum. The results indicate that A. franciscana and P. lividus larvae are sensitive to the toxicity of A. minutum and P. parvum. LC50 comparison analysis between the tested organisms reveals that A. franciscana is the most sensitive organism for A. minutum. These findings suggest that the use of different organizational biological level bioassays appears to be a suitable tool for A. minutum and P. parvum toxicity assessment.

Gender equality in life insurance

[EN]This project is going to study the implications of the gender of an individual in the rate-setting process of life insurance. In order to do so there is a review of the continuous changes that have taken place in the national and European legislation following the enactment of the Directive 2004/113/EC, as well as its consequences from the prohibition to differentiate the premiums and benefits on the grounds of gender. In this area, the evolution of the Spanish insurance sector and the influence of the new legislation are examined. Furthermore, there is an analysis of the differences between men and women, which to some extent have a direct impact in the management and development of the life insurance companies. Finally, methods to calculate the premium and the benefits are proposed with the purpose of preventing the restrictions imposed by the Directive 2004/113/EC. In order to check the repercussions of the use of unisex tables a comparison is made between the premiums obtained for a whole life insurance by allocating the same weighing to the actuarial male and female mortality tables and those that would result if the distinction by gender were allowed.

Proceso de creación del “Competitor and Market Report” para cubrir las necesidades de información de la alta dirección de Zurich Insurance Ltd.

Proceso del Competitor and Market Report para cubrir las necesidades de información de la Alta Dirección de Zurich Insurance plc, para la unidad de negocio Global Corporate (GC) en la región de Europa Medio Oriente y África (EMEA) “ El Competitor and Market Report surge de la situación de desinformación en la que los altos directivos y los representantes de CD&M GCiEMEA de cada país se encuentran. Este trabajo consiste en estudiar todo el proceso de creación del Competitor and Market Report, empezando por la identificación del problema, búsqueda de soluciones e implementación y puesta en marcha de la solución. Este proceso nos obligara a inventariar y analizar los estudios que hasta el momento la empresa de seguros Zurich Insurance Ltd, recibía procedentes de fuentes externas o de distintos departamentos que rara vez estaban coordinados en la producción de estos informes. Analizaremos cuales son las áreas de información que estos informes no cubren. El proceso nos obligara a realizar un trabajo de campo. Haremos entrevistas que nos ayudaran a comprender mejor las necesidades de información de los altos directivos. A partir de los resultados anteriores se justificará la creación del Competitor and Market Report, y se estudiará todo el proceso de creación y puesta en marcha de un informe que cubra las necesidades anteriores.

Integrated assessment of environmental pollution using diverse sentinel organisms within Basque marine environments

294 p.