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  • Articles  (67)
  • Chemical Engineering
  • Ecology
  • crystal structure
  • 2005-2009  (67)
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Journal
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  • 1
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    Ecological Impact of Tsunami on the nearshore western coasts of Kerala and Tamil Nadu (2008)
    Details
    Publication Date: 2017-04-04
    Description: Deapartment of Ocean Development (DOD), Government of India
    Description: Unpublished
    Description: open
    Keywords: Tsunami ; India ; Ecology ; Sedimentology ; 04. Solid Earth::04.04. Geology::04.04.04. Marine geology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: report
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  • 2
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    Ecotourism clashes with industrialisation (2005)
    Details
    Publication Date: 2021-05-19
    Description: The Amadiba Coastal Community at Xolobeni in the Eastern Cape are caught in a tug-of-war between an Australian company, Mineral Commodities, which is planning to mine in the area, and environmentalists who are opposed to both the coastal dune mining and the N2 toll road, which will cut through the area.
    Description: Published
    Keywords: Tourism ; Ecology
    Repository Name: AquaDocs
    Type: Report , Non-Refereed
    Format: 55343 bytes
    Format: application/pdf
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  • 3
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    Ecología química de las esponjas excavadoras Cliona aprica, C. caribbaea, C. delitrix y C. tenuis (2007)
    Details
    Publication Date: 2021-05-19
    Description: The Caribbean encrusting and excavating sponges Cliona aprica, C. caribbaea, C. delitrix and C. tenuis (Porifera, Hadromerida, Clionaidae), aggresively undermine and displace live coral tissue. At San Andrés island and Islas del Rosario (Colombian Caribbean), in all 145 observed cases of direct contact of the sponges C. aprica, C. caribbaea and C. tenuis with 17 coral species, corals showed unhealthy signs in their tissue. It was also noticed that the surface of these sponges is colonized by few organisms and that they are rarely preyed upon. To establish the possible use of chemical substances by these sponges in competition for space with corals (allelopathy), as inhibitors of larval settlement (antifouling), and as feeding deterrents against generalist fish (antipredatory), the activity of crude organic extracts was experimentally evaluated. Extracts were prepared in methanol and 1:2 metanol:dichloromethane and incorporated in experimental media at the natural concentration within the sponges. Using an unpublished method being developed by J. Pawlik (University of North Caroline at Wilmington) and M. Ilan (Tel Aviv University), PhytagelTM disks with crude extracts of each of the four sponge species, placed on the coral Montastrea cavernosa, produced a greater degree of polyp mortality than control gels without extract. Gels with extracts of the sponges C. aprica and C. caribbaea + C. tenuis, served in Petri dishes and used as substratum in the field, inhibited significantly the settlement of fouling organisms, in comparison to control gels. In laboratory trials, wheat flour pellets with extracts C. delitrix and C. caribbaea + C. tenuis were significantly rejected by the omnivore reef damselfish, Stegastes partitus, whereas pellets with extract of C. aprica did not deter feeding. These results suggest that substances present in the crude organic extracts of these sponges may be responsible in part for their ability to compete for reef substrata and to defend themselves from potential aggressors.
    Description: Published
    Description: Cliona, Encrusting excavating sponges, Space competition, Allelopathy, Antifouling, Antipredatory
    Keywords: Ecology ; Sponges ; Sponges ; Coral ; Ecology ; Competitive behaviour ; Associated species ; Antifouling substances
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.43-67
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  • 4
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    Preliminary Assessment of the Ecological Status of Godineau Swamp: Establishing a Socio-Economic Baseline (2009)
    Details
    Publication Date: 2021-05-19
    Description: Human activities adjacent to and within a wetland, influence its ecological status. An understanding of the social and economic conditions in the communities within and adjacent to the Godineau Swamp is fundamental to its sustainable use. The effective functioning of wetland resources is centered on the sustainable management of human activities and traditional uses. The Godineau Swamp is the second largest wetland system found on the Gulf of Paria of Trinidad. Traditionally the wetland has supported a fish and shellfish industry and provided land for agriculture livestock farming and housing. Oil exploration has taken place in the Godineau Swamp for the last fifty years and the Swamp continues to provide several opportunities for ecotourism.
    Description: The following groups assisted Communities of Godineau Swamp Central Statistical Office (CSO) Community Development Division
    Keywords: Ecology ; Swamps ; Ecology ; Swamps ; Baseline studies ; Socioeconomic aspects
    Repository Name: AquaDocs
    Type: Other
    Format: 1
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  • 5
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    The impact generated on Sea Turtles by Fisheries in the Southwestern Atlantic Ocean (2009)
    WWF Programa Marino para Latinoamérica y el Caribe
    Details
    Publication Date: 2021-05-19
    Description: This document, which is directed at the fishing sector, researchers, conservationists and fishery administrators, was developed by researchers who are members of the Specialists Group for Marine Turtle Research and conservation in the Southwestern Atlantic Ocean (SWA) in response to the urgent need to evaluate the impact generated on sea turtles by fisheries. Historically, sea turtle conservation efforts have focused almost exclusively on the protection of nesting beaches. Nevertheless, over the last decade, research has proved incidental mortality as a result of fishing activities to be one of the greatest threats to these animals. This type of interaction is not only problematic for turtles, but also generates financial losses for fishermen and businesses. In spite of the efforts that are currently underway, researchers still do not have a detailed understanding of the impact that bycatch produces on sea turtle populations in the SWA. We have a long way to go before its effects can be minimized. Further research is needed regarding the biology and ecology of the various turtle species as well as the effective application of mitigation measures. The life cycles of sea turtles are long and complex. Turtles occupy various ecosystems (nesting beaches, coastal, neritic and oceanic zones, as well as pelagic and demersal areas) throughout their lifetimes, transcending various Exclusive Economic Zones and International Waters. The five species that inhabit the SWA region perform vast feeding and reproductive migrations, traveling through areas where many different fishing fleets operate. Therefore, sea turtles in the SWA interact with virtually all fisheries. These circumstances make it necessary to carry out biological, fishing related and conservation studies on a regional level. The efficiency of the existing international and national legal instruments has yet to be determined, in terms of their effectiveness in protecting sea turtles. In some cases, legislation that is specifically related to the interaction between fisheries and turtles does exist, such as those laws requiring the mandatory use of turtle excluding devices (TEDs). There are also explicit bans on sea turtle capture. Nevertheless, none of these regulations prevent sea turtle bycatch. Although some regional legal instruments are needed, these and the existing legislation will only be effective if they are accompanied by a broader range of permanent education and control measures, to achieve the commitment of all the parties involved. The ecosystem approach is gaining popularity among fishery administration organizations. Research and conservation efforts should also be moving in that direction. A regional and international effort is required in order to compile information regarding the bycatch produced by the various types of fisheries and fleets operating in the area. The enormous increase in fishing pressure that these fleets are exerting in this area has not been accompanied by an increase in information regarding the bycatch of species that have no commercial value. Pelagic longlining is one of the fishing methods, which must be most closely monitored, due to the high levels of bycatch that it produces, as well its ample distribution throughout the region, and the high level of fishing effort that it accounts for. Coastal trawlers and gillnetters must also be considered critical players, because they too produce a large rate of bycatch. These are the three types of fisheries that are most broadly distributed throughout the region, accounting for the majority of the fishing effort. Most of the institutions that work toward sea turtle conservation in the area have only begun to address the issue of bycatch over the last decade. This timeframe is reflected in the scope and quantity of the available publications, as well as the progress of activities directed at mitigating this problem. All of the institutions that have been mentioned in this report have made the gathering of information regarding interaction between sea turtles and fisheries one of their top priorities. Some institutions are even developing working programs for monitoring fisheries and testing mitigation measures. Many of these institutions have managed to develop adequate relationships with fishermen, ship owners and administrators. Nevertheless, limited access to funding is an obstacle to the development and testing of mitigation measures. The SWA network, which is a very valuable instrument that was created in 2003, has allowed the region’s institutions and researchers to exchange information and share their experience, in addition to lending each other support in carrying out joint activities, thus strengthening sea turtle conservation efforts. The capacity demonstrated so far by the region’s researchers and institutions, testifies to their ability to continue to make progress in knowledge generation and tests of bycatch mitigation measures.
    Description: Published
    Keywords: Fisheries ; Ecology ; Fishing gear ; Fisheries ; Ecology ; Fishing gear
    Repository Name: AquaDocs
    Type: Book
    Format: 71 pp
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  • 6
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    Caracterización ecológica de las asociaciones de peces demersales del Caribe colombiano Norte, con énfasis en los pargros (Lutjanidae) (2009)
    INVEMAR, Santa Marta - Colombia
    Details
    Publication Date: 2021-05-19
    Description: The mean objetives ofthe present study were to establish the existence of demersal fish associations in the shelf and superior slope of the Colombian Caribbean northern zone and determine if the biotical patterns determineted by these associations are correlationed with the patterns structured by the environmental conditions evaluated. Data were taken from three demersal resources assessment surveys of the INPA-VECEP/UE Program, carried out during the period 1995-1996. The station groups were not consistent in terms of species composition along the different periods. The dominant characteristics of demersal species associations was the absence of temporal persistence. Only it was possible to find some partial associations which remain during a maximum oftwo sampling periods: Rhomboplites aurorubens/Priacanthus arenatus, Lutjanus analis/Lutjanus synagris y Eucinostomus argenteus/Upeneus parvus. It were observed seasonal changes in the set of environmental variables which better explain the community structure, but depth always appears in the optimal correlation set. Apparently, species co-existence is rather due to a common answer to environmental gradients, than to species interactions: Nevertheless, the relatively low correlations seem to indicate that other factors, like migrations for biological reasons, could also affect the structure and composition of demersal fish associations, on a smaller time scale.
    Description: El presente estudio se centró en los objetivos de establecer la existencia de asociaciones de peces demersales en la plataforma y el talud superior de la zona norte del Caribe colombiano, y determinar si los patrones bióticos determinados por estas asociaciones se correlacionan con los patrones estructurados por las condiciones ambientales evaluadas. Los datos del estudio provinieron de tres campañas de evaluación de recursos demersales del Programa INPA-VECEP/UE, efectuadas durante el período 1995-1996. La característica dominante de los grupos de estaciones y de las asociaciones de peces demersales fue la carencia de persistencia temporal. Únicamente fue factible establecer la persistencia de algunas asociaciones parciales durante un máximo de dos períodos de muestreo, como fue el caso de Rhomboplites aurorubens/Priacanthus arenatus, Lutjanus analis/Lutjanus synagris y Eucinostomus argenteus/Upeneus parvus. Se presentaron cambios estacionales en el conjunto de variables ambientales que explicaron de mejor forma la estructura comunitaria, a excepción de la profundidad, que siempre figuró en la combinación que produjo la correlación óptima. Los cambios en los patrones bióticos parecen señalar que la co-existencia de las especies se debe básicamente a una respuesta común a los radientes ambientales, antes que a interacciones entre especies. Sin embargo, el hecho de que estas correlaciones fuesen relativamente bajas parece indicar que a una escala de tiempo menor otros factores, tales como posibles migraciones por razones biológicas,también podrían afectar la estructura y composición de las asociaciones de peces demersales.
    Description: Published
    Description: Assemblages; Lutjanidae
    Keywords: Demersal fisheries ; Ecology ; Demersal fisheries ; Ecology
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 7
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    El impacto generado por las pesquerías en las tortugas marinas en el Océano Atlántico Sud Occidental (2009)
    WWF Programa Marino para Latinoamérica y el Caribe
    Details
    Publication Date: 2021-05-19
    Description: Este documento, dirigido al sector pesquero, investigadores, conservacionistas y administradores de las pesquerías, surge como respuesta de investigadores pertenecientes al Grupo de Especialistas en Investigación y Conservación de Tortugas Marinas en el Atlántico Sud Occidental (ASO) a la urgente necesidad de evaluar el impacto de las pesquerías sobre las tortugas marinas. Históricamente, los esfuerzos referidos a la conservación de las tortugas marinas se han dirigido casi exclusivamente a proteger las playas de anidación. Sin embargo en la última década se ha podido comprobar que una de las mayores amenazas es la mortalidad incidental causada por las pesquerías. Esta interacción no implica únicamente un problema para las tortugas, sino que también genera pérdidas económicas para los pescadores y las empresas.
    Description: This document, which is directed at the fishing sector, researchers, conservationists and fishery administrators, was developed by researchers who are members of the Specialists Group for Marine Turtle Research and Conservation in the Southwestern Atlantic Ocean (SWA) in response to the urgent need to evaluate the impact generated on sea turtles by fisheries. Historically, sea turtle conservation efforts have focused almost exclusively on the protection of nesting beaches. Nevertheless, over the last decade, research has proved incidental mortality as a result of fishing activities to be one of the greatest threats to these animals. This type of interaction is not only problematic for turtles, but also generates financial losses for fishermen and businesses.
    Description: Cont. fotografías
    Description: Published
    Description: Sea Turtle, keeping
    Keywords: Fisheries ; Ecology ; Fishing gear ; Fisheries ; Ecology ; Fishing gear
    Repository Name: AquaDocs
    Type: Book
    Format: 71
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  • 8
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    Moluscos bivalvos y gasteropodos (2008)
    Mar del Plata: Instituto Nacional de Investigacion y Desarrollo Pesquero
    Details
    Publication Date: 2021-05-19
    Description: The main life history characteristics, ecology and fishing interest of bivalve and gastropod species from the Argentine Sea are described. Exploited bivalve species are: mussel Mytilus edulis platensis, cholga Aulacomya ater, tehuelche scallop Aequipecten tehuelchus, Patagonian scallop Zygochlamys patagonica. Bivalve species irregularly exploited are: yellow clam Mesodesma mactroides, purple clam Amiantis purpurata, hard shell clam Ameghinomya antiqua and wedge shell Donax hanleyanus. It is also presented information on species of potential interest: clams Eurhomalea exhalbida and Pitar rostratus, half naked pen shell Atrina seminuda, 'geoduck' Panopea abbreviata, razor shells Solen tehuelchus, Ensis macha, Tagelus plebeius, and flat oyster Ostrea puelchana. Gastropods considered are: volutids Adelomelon (Pachycymbiola) brasiliana, Adelomelon (Pachycymbiola) ancilla, Adelomelon beckii, Zidona dufresnei and Odontocymbiola magellanica, small gastropods (families Nassariidae, Muricidae, Buccinidae and Olividae) and limpets and keyhole limpets (families Patellidae and Fissurellidae).
    Description: Lasta, M.L.; Ciocco, N.F.; Bremec, C.; Roux, A. 1998. Moluscos bivalvos y gasteropodos. En: Boschi, E.E.; ed. Los moluscos de interés pesquero. Cultivos y estrategias reproductivas de bivalvos y equinoideos. Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero INIDEP, (El Mar Argentino y sus recursos pesqueros, 2) p.115-142.
    Description: Published
    Description: Mollusca, bivalvia, gastropoda, Mytilus edulis platensis, Aulocomya ater, Aequipecten tehuelchus, Zygochlamys patagonica, Mesodesma mactroides, Amiantis purpurata, Ameghinomya antiqua, Donax hanleyanus, mejillón, berberecho, cholga, navaja, navajuela, ostra, caracol, distribución geográfica, ecología, historia de vida, revisión bibliográfica, recursos potenciales, moluscos marinos
    Keywords: Life history ; Ecology ; Geographical distribution ; Marine molluscs ; Potential resources ; Life history ; Ecology ; Geographical distribution ; Literature reviews
    Repository Name: AquaDocs
    Type: Book Section
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  • 9
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    Ecología del cangrejo violinista Uca uruguayensis: distribución, comportamiento reproductivo y su interacción con aves migratorias. (2009)
    Details
    Publication Date: 2021-05-19
    Description: Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales (Argentina)
    Description: Tesis (Doctorado). Copia en PDF: portada, índice, resumen, referencias bibliográficas. Copia impresa en Biblioteca UNMdP (Universidad Nacional de Mar del Plata)
    Description: Uca uruguayensis, Cangrejo violinista, Ecología, densidad, distribución, conducta reproductiva, relaciones interespecíficas, abundancia, relaciones tróficas, predación, condiciones ambientales, sedimentos
    Keywords: Distribution ; Reproductive behaviour ; Ecology ; Predation ; Density ; Environmental conditions ; Ecology ; Density ; Distribution ; Reproductive behaviour ; Interspecific relationships ; Abundance ; Trophic relationships ; Predation ; Environmental conditions
    Repository Name: AquaDocs
    Type: Theses and Dissertations
    Format: 128
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  • 10
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    Caracterización ecológica y pesquera del área de reserva artesanal entre la I y II Regiones (2007)
    Details
    Publication Date: 2021-05-19
    Description: El sector pesquero de la I y II Regiones, comprende un importante segmento de la economía nacional, contribuyendo fuertemente con el empleo en las zonas costeras y al abastecimiento de materia prima. En esta macrozona la pesca está representada por dos sectores: industrial y artesanal y a su vez está constituída por tres segmentos principales de recursos: pesquerías bentónicas, pesquerías de peces y recolección de algas. Dada la importancia de la actividad extractiva artesanal e industrial en la franja de las 5 millas de la I y II Regiones, en el presente informe se describe y analiza la actividad extractiva de las principales pesquerías. Además se entrega una completa revisión de los principales antecedentes eco-pesqueros del litoral de las regiones I y II, los cuales en conjunto con la información generada en el marco del proyecto, permitió generar una base de información georreferenciada, actualizada e integrada, para la franja de las 5 millas.
    Description: Fondo de Investigación Pesquera (FIP)
    Description: Published
    Keywords: Ecology ; Fishery resources ; Artisanal fishing ; Coastal zone ; Ecology ; Fishery resources
    Repository Name: AquaDocs
    Type: Report
    Format: 490 pp
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