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Prospección hidroacústica en zonas de desove de peces de la plataforma nororiental de Cuba. Caso: biajaiba (Lutjanus synagris, Linnaeus, 1758.

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Author
Betanzos, Abel
Linares, Esteban O.
Martín, Heriberto A.
Valle, Servando
Tizol, Rafael F.
Hernández, Jorge L.
Date
2015

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Alternative Title
Hydroacoustic exploration in spawning fish areas in the northeastern shelf of Cuba. Case: Lane snapper (Lutjanus synagris, Linnaeus, 1758.
Abstract
Se realizaron muestreos hidroacústicos en zonas y periodo de concentración de desove de peces de la familia Lutjanidae. Las zonas de estudio se localizan al norte del canal de Boca de Sagua la Grande y de cayo Lanzanillo, región central de la plataforma nororiental de Cuba. Se utilizó una ecosonda multipropósito SIMRAD EK 15 con frecuencia de 200 kHz, y se realizó una prospección hidroacústica de la ictiofauna, a partir de mediciones de la fuerza del blanco (Target strength = TS) y con el objetivo de localizar y evaluar áreas de agregación de la biajaiba (Lutjanus synagris, Linnaeus, 1758). En áreas poco profundas (<15m) de ambas zonas prospectadas, se estimó una densidad de peces < 1 ind./m 2 , la que se incrementó a medida que aumentó la profundidad. En la zona oceánica adyacente al talud, a una profundidad entre 20 y 50 m, al norte de Boca de Sagua, se detectó una agregación de desove de biajaiba. Según los valores de la TS y su relación con el largo horquilla (LH), se calculó una talla media de 19.7±3.4 cm LH, estimándose una densidad media de 5 ind./m 2 y densidad en peso de 0.6 kg/m 2 .
Hydroacoustic samplings were conducted in known areas and period of spawning concentration of species of Lutjanidae family. The study areas are located north of Boca de Sagua la Grande c hannel and Cayo Lanzanillo, in the central region of Cuban northeastern insular shelf. A multipurpose SIMRAD EK 15 echo sounder was used, with frequency of 200 kHz, and hydroacoustic sampling of fish fauna was carried out in order to identify and assess aggregation areas of Lane snapper (Lutjanus synagris, Linnaeus, 1758), based on target strength (TS) measurements. In shallow areas (<15 m) at both evaluated sites, a fish density <1ind. /m 2 was estimated, increasing with depth. In the ocean area adjacent to the slope north of Boca de Sagua, between 20 and 50 m deep, a Lane snapper spawning aggregation was detected. According to TS values and its relation to fork length, an average size of 19.7 ± 3.4 cm FL was calculated, estimating a mean density of 5 ind./m 2 and a density in weight of 0.6 kg/m 2 .
Journal
Serie Oceanológica
Issue/Article Nr
14
Page Range
pp.46-57
URI
http://hdl.handle.net/1834/9227
Collections
Separatas (CIP)

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