Cephalopods of Pacific Latin America

Markaida, Unai; Gilly, William F.

doi:10.1016/j.fishres.2015.09.014

Cited by 24 publications

(21 citation statements)

References 26 publications

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“…Morphological identification of octopuses was performed following Leite et al (). Because of misidentifications of octopus species in Latin America (Flores‐Valle et al, ; Lima et al, ; Markaida & Gilly, ), samples of muscle tissue were collected for analysis with genetic markers. Muscle tissue sample from 10 octopuses was preserved in 95% undenatured ethanol following the procedure suggested by Wall, Campo, and Wetzer () and maintained at −4°C for 72 hr for tissue fixation.…”

Section: Methodsmentioning

confidence: 99%

Food and feeding habits of Octopus insularis in the Veracruz Reef System National Park and confirmation of its presence in the southwest Gulf of Mexico

et al. 2019

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Octopuses are active predators that feed on a wide range of prey including crustaceans, fishes, and mollusks. They are important components of coral reef systems and support local and artisanal fisheries in the Gulf of México. Octopus insularis has been found to be one of the most relevant components in catches from the coral reef system of Veracruz in the southwestern Gulf of Mexico, and its role in the ecosystem requires assessment. To corroborate the morphological identification of O. insularis, six octopuses were identified by genetic methods. And to understand the trophic relationships between this octopus species and its prey, 394 octopuses caught during 2016 and 2017 by an artisanal fleet were sampled and their stomach contents analyzed. Results showed that crustaceans are the most frequently consumed group, with the genera Mithraculus and Etisus being the most important in the diet. Fishes, bivalves, and gastropods were identified as uncommon prey items in the diet. Their presence in the stomachs could be related to the movement of this octopus outside of the coral reef. Considering that our samples were of medium‐ and large‐sized individuals, cannibalism could be discarded for O. insularis in this size range in the Veracruz reef system. These findings suggest a generalist and opportunistic predation of O. insularis on the most abundant and available prey in the study area, namely the crustaceans. These represents an effective transfer of biomass from the low trophic levels to top predators in the coral reef system.

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Section: Methodsmentioning

confidence: 99%

Food and feeding habits of Octopus insularis in the Veracruz Reef System National Park and confirmation of its presence in the southwest Gulf of Mexico

et al. 2019

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“…Cephalopods are the fastest growing aquatic population in the world harvested in fisheries due to the increasing demand for low-cost marine species. Jumbo squid ( Dosidicus gigas ) is an endemic species to the east Pacific Ocean, and is by far the most captured squid species worldwide, representing over 1/3 of the cephalopod captures in the last years ( 1 ).…”

Section: Introductionmentioning

confidence: 99%

Partial Characterization of a Low-Molecular-Mass Fraction with Cryoprotectant Activity from Jumbo Squid (Dosidicus gigas) Mantle Muscle

Álvarez-Armenta¹,

Carvajal–Millán²,

Pacheco‐Aguilar³

et al. 2019

Food technol. biotechnol. (Online)

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Freezing conditions affect fish muscle protein functionality due to its denaturation/aggregation. However, jumbo squid (Dosidicus gigas) muscle protein functionality remains stable even after freezing, probably due to the presence of low-molecular-mass compounds (LMMC) as cryoprotectants. Thus, water-soluble LMMC (<1 kDa) fraction obtained from jumbo squid muscle was evaluated by Fourier transform infrared spectrometry. From its spectra, total carbohydrates, free monosaccharides, free amino acids and ammonium chloride were determined. Cryoprotectant capacity and protein cryostability conferred by LMMC were investigated by differential scanning calorimetry. Fraction partial characterization showed that the main components are free amino acids (18.84 mg/g), carbohydrates (67.1 µg/mg) such as monosaccharides (51.1 µg/mg of glucose, fucose and arabinose in total) and ammonium chloride (220.4 µg/mg). Arginine, sarcosine and taurine were the main amino acids in the fraction. LMMC, at the mass fraction present in jumbo squid muscle, lowered the water freezing point to –1.2 °C, inhibiting recrystallization at 0.66 °C. Significant myofibrillar protein stabilization by LMMC was observed after a freeze-thaw cycle compared to control (muscle after extraction of LMMC), proving the effectiveness on jumbo squid protein muscle cryo- stability. Osmolytes in LMMC fraction inhibited protein denaturation/aggregation and ice recrystallization, maintaining the muscle structure stable under freezing conditions. LMMC conferred protein cryostability even at the very low mass fraction in the muscle.

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“…Thus O. mimus would range from the Gulf of California to northern Chile. It is the main octopus fishery in the Eastern Pacific, with combined annual catches ranging 3–6.5 × 10 3 t, mostly taken with hookah or free diving (Zúñiga et al ., 2014; Markaida & Gilly, 2016). However, the fishery is only regulated in Peru and Chile, where regional and temporal closures have been considered, plus a minimum legal size (MLS) of 1 kg BW (Rodhouse et al ., 2014; Emery et al , 2016; Markaida & Gilly, 2016).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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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.

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Cephalopods of Pacific Latin America

Cited by 24 publications

References 26 publications

Food and feeding habits of Octopus insularis in the Veracruz Reef System National Park and confirmation of its presence in the southwest Gulf of Mexico

Food and feeding habits of Octopus insularis in the Veracruz Reef System National Park and confirmation of its presence in the southwest Gulf of Mexico

Partial Characterization of a Low-Molecular-Mass Fraction with Cryoprotectant Activity from Jumbo Squid (Dosidicus gigas) Mantle Muscle

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

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