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  • 1
    Publication Date: 2021-05-19
    Description: Las capturas de langosta espinosa Panulirus argus (Latreille, 1804) en Cuba alcanzaron sus mayores volúmenes en la década de 1980 con un promedio anual de 11565 ton. En la década de 1990, la captura descendió a un promedio de 9327 ton, lo cual se ha visto agudizado entre 2000 y 2007 con un promedio de 6262 ton y una mayor variabilidad de las capturas, a pesar de un perfeccionamiento del sistema de manejo pesquero dado por: la disminución del esfuerzo pesquero y de la tasa de mortalidad por pesca desde 1999, el aumento del período de veda desde 2001 y el incremento gradual de la talla mínima legal de captura a partir de 2004. Los análisis más recientes sobre el estado de esta pesquería fueron presentados en el Quinto Taller Regional sobre la Evaluación y la Ordenación de la Langosta Común del Caribe en septiembre 2006 (Puga et al, 2006; FAO, 2007), donde se reconoció por la comunidad científica especializada que la pesquería de langosta cubana se encontraba bien manejada y plenamente explotada (no sobre- explotada) y se concluyó que además de la mortalidad por pesca, otros factores ajenos al sector pesquero estaban produciendo afectaciones en la abundancia del recurso, al causar daños al hábitat 1 en zonas de cría, influyendo negativamente por esta vía sobre el reclutamiento y la producción de langostas. Entre estos aspectos para Cuba se señalaron: la mayor frecuencia e intensidad de huracanes durante el último decenio, el desarrollo de las zonas costeras, la construcción de presas en las cuencas de captación de los ríos y de carreteras en el Archipiélago Sabana-Camagüey comunicando la isla principal con los cayos y los cayos entre si (pedraplenes).
    Description: Published
    Keywords: Fisheries ; Lobster fisheries ; Fisheries ; Environment management ; Recruitment ; Coastal zone management
    Repository Name: AquaDocs
    Type: Book Section
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  • 2
    Publication Date: 2021-05-19
    Description: Se utiliza la información de perfiles de playa en cuatro localidades de las Playas del Este obtenidos en los últimos 27 años, para describir la tendencia de la playa a mediano plazo. A partir de datos de posición de la línea de costa y de volúmenes de arena de la playa emergida se estableció la tasa de cambio de la playa utilizando la regresión lineal simple. Los resultados confirman la tendencia erosiva de un sector de la playa de Guanabo. La tasa anual de retroceso de la línea de costa ha sido de -0.97 m/año que ha establecido un cambio total de - 26 ±7 m. La reducción de los volúmenes de arena ha sido de -28 ± 8 m3/m, a un ritmo de -1.04 m3/m/año. En la playa de Santa María, la línea de costa en algunas localidades ha experimentado retroceso y en otras ha ocurrido poco cambio, sin embargo en todos los casos se ha producido un incremento notable en los volúmenes de arena de la playa emergida debido a la formación y crecimiento de las dunas. La reactivación de los procesos eólicos que dio lugar al restablecimiento de la morfología de dunas fue posible por la eliminación del bosque de casuarinas que, durante más de 20 años, ocupó la zona posterior de la playa.
    Description: The information of beach profiles, obtained during the last 27 years in four localities of Playas del Este, is used to describe the medium-term tendency of the beach. Starting from data of the shoreline location and sand volumes of the emerged beach, the beach change rate was established applying simple linear regression. The results confirm the erosive tendency of a sector in Guanabo beach. The annual rate of shoreline retreat has been -0, 97 m/y, which has established a total change of - 26 ± 7 m. The reduction in sand volumes has been -28 ± 8 m3/m, at a rate of -1,04 m3/m/y. In Santa Maria beach, the shoreline has experienced retreat in some localities or little change in the others. However, a remarkable increase in sand volumes of the emerged beach has taken place in all the cases. The reactivation of Aeolian processes, resulting in the reestablishment of dune morphology, was possible due to the removal of the Australian pine forest that had occupied the area from the beach top landward for more than 20 years.
    Description: Published
    Description: playas, evolución a mediano plazo, regresión lineal, beach, medium- term evolution, lineal regression.
    Keywords: Dunes ; Beach morphology ; Beach erosion ; Dunes
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 3
    Publication Date: 2021-05-19
    Description: Abstract: An analysis of sea level synoptic variations in the Gulf of Batabanó is carried out starting from data of direct measurements. Spectral analysis is applied. It is corroborated with new elements the prevalence of meteorological variations in part of the southwestern shelf, and the spectral structure of this shelf is characterized. The influence of meteorological factors is evaluated. It is demonstrated the influence exerted by the southern component of the wind on this variations. There are signs of the possible influence of ENSO on sea level monthly variability at La Coloma; and there is a great similarity between this variability and that of Siboney.
    Description: Published
    Description: Synoptic Variations
    Keywords: Sea level ; Spectral analysis ; Sea level ; Storm surges ; Spectral analysis
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 4
    Publication Date: 2021-05-19
    Description: Series cronológicas de nivel del mar obtenidas durante el año 2004 en tres estaciones mareaográficas ubicadas en la costa noroccidental de Cuba muestran en las frecuencias bajas, ω 〈 0.2 ciclos por día (cpd), una propagación hacia el E con velocidad de fase de una onda baroclínica de Kelvin (2-3 m/s). La coherencia entre las localidades alcanza sus valores máximos en la banda de los 0.1-0.2 cpd. Estos resultados permiten verificar la existencia de ondas atrapadas a la costa en la zona de estudio.
    Description: Time series of sea level during 2004, from three tide gauges located in the NW coast of Cuba, show that in low frequencies, ω 〈 0.2 cycles per day (cpd), fluctuations propagate eastward with the phase speed of baroclínic Kelvin wave (2-3 m/s). The alongshore coherence reaches its maximum values in the frequency band of 0.1-0.2 cpd. These results allow verifying the existence of coastal-trapped waves in the study zone.
    Description: Published
    Description: nivel del mar, ondas atrapadas a la costa, coastal-trapped waves
    Keywords: Sea level ; Sea level
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 5
    Publication Date: 2021-05-19
    Description: The results of the application of the formula of Kawamura (1951) to in situ meteorological data in order to forecast the sand transport rate due to wind action are described in this paper. A new episode of dune formation started in the 1980's in these beaches, and more recently they have been affected by aeolian erosion since the beginning of the destruction of foredune vegetation due to the increase in tourist activities in the area. Shear velocity (U*t) values on the surface were determined starting from wind speed vertical profiles. Critical shear velocity values to start the sand movement were also determined, taking into account the grain size variations of the beach material along the coast. And finally, transport rates are calculated in each case. A comparison is carried out between the transport rates estimated starting from wind data and those resulting from meaurements of the sand volumes accumulated in the dunes during 12 years of monitoring. The main transport directions are shown, as well as the direction of the resultant and their relation to the morphological and dynamic pattern of the dunes. Besides, it is concluded that aeolian transport is limited to those sites where grain size is higher than 0.5 mm.
    Description: Published
    Description: coastal dunes, foredunes, deflation, eolian erosion.
    Keywords: Dunes ; Dunes ; Beach morphology ; Sand structures ; Eolian transport
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 6
    Publication Date: 2021-05-19
    Description: The subinertial response of sea level to meteorological forcing in the Gulf of Mexico is examined using observations of sea level, atmospheric pressure and surface wind covering the period 1985-1986. Spectral analysis and multiple regression in the frequency domain methods are employed for data processing. The analysis shows that the atmospheric pressure is the principal forcing agent. The response of sea level to atmospheric pressure is found to be non isostatic and dependent on frequency and geographical location; the response is overisostatic in the north zone and underisostatic in the south zone of the Gulf, approaching isostasy only at stations located in the Cuban coast. The importance of local and remote wind in sea level variability are determined; it is found an effective zone of sea level forcing due to the wind on the West Florida Shelf.
    Description: Published
    Description: meteorological forcing.
    Keywords: Sea level ; Sea level ; Sea level changes
    Repository Name: AquaDocs
    Type: Journal Contribution
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