Search

El Crucero de Investigación del calamar gigante Dosidicus gigas (d’Orbigny, 1835) se efectuó del 18 de noviembre al 22 de diciembre 2019, a bordo de los BIC José Olaya Balandra y Humboldt; para estimar índices de abundancia, determinar estado biológico y poblacional e interrelación del recurso con las condiciones del ambiente marino. El BIC Olaya cubrió la zona norte-centro, entre Punta Sal (4°00’S) y Cerro Azul (13°04’S) de 38 a 190 mn de la costa. El BIC Humboldt la zona sur, de Cerro Azul (13°04’S) a Ilo (17°65’S) de 39 a 194 mn de la costa. El recurso presentó amplia distribución, entre 38 y 194 mn de distancia a la costa, con mayores densidades frente a Punta Sal y Salaverry (4°-8°30’S) de 80 a 190 mn de distancia a la costa, y frente a Mollendo-Ilo de 90 a 120 mn de la costa. El mayor índice de concentración se dio en 3°-5°S con 76,9-100,6 m2/mn2 y en 8°-13°S con 56,8 y 53,3 m2/mn2. La captura total del calamar gigante fue 2.255,7 kg en 274 operaciones/lances de pesca, correspondiendo 2.238,8 kg a 197 operaciones con líneas de mano con potera y 16,8 kg a 77 lances con red de arrastre pelágica. La CPUE promedio en número (línea de mano con potera) presentó mayor valor en el norte (1,1 ejem/h/pescador), en la zona sur fue 2,6 kg/h/pescador. La estructura de tallas total varió de 1 a 72 cm de LM; para la línea de mano con potera fluctuó de 18 a 72 cm de LM, con la red de arrastre de 1 a 43 cm. En las zonas norte y centro se observó predominio de ejemplares menores de 40 cm LM, mientras que al sur fueron de mayor tamaño. Al norte y centro predominaron hembras maduras, mientras al sur estuvieron en desove. ABSTRACT: The Instituto del Mar del Perú (IMARPE) carried out a research cruise on jumbo flying squid Dosidicus gigas (d’Orbigny, 1835) onboard the R/Vs José Olaya Balandra and Humboldt. This cruise took place between November 18 to December 22, 2019, and it was intended to estimate abundance indexes and to determine the biological and population status of the squids and their interrelation with the conditions of the marine environment in their concentration areas. The R/V Olaya covered the northern-central area from 4°S (Punta Sal) to 13°04’S (Cerro Azul) while the R/V Humboldt covered the southern area from 13°04’S (Cerro Azul) to 17°65’ (Ilo), at distances between 39 nm and 194 nm offshore. The resource was widely distributed, between 38 and 194 nm offshore. Its highest densities occurred off Punta Sal and Salaverry (4°S-8°30’S), between 80 and 190 nm offshore, and off Mollendo and Ilo, between 90 and 120 nm offshore, respectively. The highest concentration index occurred between 3°S and 5°S (76.9-100.6 m2/nm2) and between 8°S and 13°S (56.8- 53.3 m2/nm2). The total catch of the resource amounted to 2,255.7 kg in 274 fishing operations, 2,238.8 kg in 197 operations with handlines with jigs, and 16.8 kg in 77 operations with a pelagic trawl. The mean CPUE (handline with jigs) showed its highest values in the northern area (1.1 spec./hour/fisherman), while regarding weight, in the southern area, it was 2.6 kg/hour/fisherman. The size structure ranged from 1 to 72 cm ML. For the specimens caught using handline with jigs, the size ranged from 18 to 72 cm ML, while for those caught with trawl, it fluctuated between 1 and 43 cm ML. The northern and central areas had a predominance of specimens smaller than 40 cm ML. Larger size individuals were observed in the southern area. Mature females predominated in the north-central area, while in the south they were spawning.