Reproduction and population structure ofOctopus mimusfished in a Marine Protected Area of Ecuador

Abstract

Octopus mimus is the main octopus targeted by the small-scale fishery in the Eastern Pacific. Commercial catches of octopus from the Reserva de Producción Faunística Marino-Costera Puntilla de Santa Elena (REMACOPSE) Marine Protected Area in Ecuador were sampled from July to December 2013 in order to describe the reproduction and population structure of this octopus. The 4171 sampled octopuses ranged from 56 to 250 mm in mantle length (ML) and 45 to 3178 g in body weight (BW). Mean octopus weight did not change monthly. Males were mostly mature while the majority of females were immature. Presence of some mature and a few spent females in all months sampled suggests that the population shows an extended spawning period. No spawning peak could be properly defined. Sex ratios did not significantly shift from the expected 1:1 in most samples. Females mature at a larger size (1234 g, BW; 165 mm, ML) than males (487 g BW; 114 mm ML). We recommend considering a minimum legal size of 1200 g BW. A year-long sampling programme for O. mimus should also be completed in order to detect any spawning peak.

Application of RAPD-PCR and Morphometric studies on two native Octopodid species from the Mediterranean Sea.

“…Moreover, he showed that the environmental conditions in Red Sea are more suitable for O. vulgarsis than in the Mediterranean Sea. (Markaida, et al 2018) used 4171 sampled Octopuses ranged from 56 to 250 mm in mantle length (ML) and 45 to 3178g in body weight in Ecuador waters postulated that sex ratios didn`t significantly shift from expected 1:1 in most samples, while in this study 50% only of morphometric data were significant according, T test. 402 samples of Octopus were investigated by Maulita et al (2018) in Indonesia, gave that a positive relationship between weight gain and Octopus length and increase in length faster than growth weight.…”

Estructura genética poblacional y filogeografía de Octopus mimus (Cephalopoda: Octopodidae) en el Pacífico oriental tropical determinada mediante loci microsatélites polimórficos

“…En el Pacífico mexicano el pulpo se extrae mediante buceo libre, scuba y trampas (López-Uriarte et al, 2005;Markaida et al, 2018;Sauer et al, 2019). No existe ningún plan de manejo pesquero y sólo hay una norma oficial que regula la captura de O. hubbsorum=O.…”

“…La pesquería de O. mimus está regulada únicamente en Perú y Chile por medio de una talla mínima de captura y las temporadas de veda regionales (Markaida y Gilly, 2016;Markaida et al, 2018;Sauer et al, 2019). En Ecuador, no se tienen registros de estadísticas pesqueras y no existe un plan de manejo para esta especie (Markaida y Gilly, 2016).…”