Contribution of Sepioteuthis sp. 1 and Sepioteuthis sp. 2 to oval squid fishery stocks in western Japan

Tomano, Satoshi; Sánchez, Gustavo; Kawai, Kentaro; Kasaoka, Noriyasu; Ueta, Yukio; Umino, Tetsuya

doi:10.1007/s12562-016-0988-6

Cited by 11 publications

(5 citation statements)

References 20 publications

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“…In our case, the movement patterns of S. lessoniana in four life stages exhibited diversity among the seasonal groups (Figures 7-9). These findings are comparable to the known ecology of S. lessoniana, including spawning (Segawa, 1987), migration (Ueta and Jo, 1990;Kanamaru et al, 2007) and depth distribution (Roper et al, 1984;Tomano et al, 2016).…”

Section: Prediction Of Ontogenetic Movement and Geographical Distribusupporting

confidence: 83%

“…This finding suggests a high level of population connectivity in S. lessoniana in Taiwan. In recent years, the coexistence of three cryptic lineages of S. lessoniana has been reported in the Indo-Pacific Ocean (Cheng et al, 2014;Tomano et al, 2016). These cryptic lineages of S. lessoniana exhibit similar morphology but are genetically distinct (Akasaki et al, 2006;Hsiao et al, 2016;Shen et al, 2016).…”

Section: Prediction Of Ontogenetic Movement and Geographical Distribumentioning

confidence: 99%

“…The individual living period and season corresponding to each data point of statolith δ 18 O values were established through the examination of microstructure. During the defined period, water temperature and salinity were obtained from the HYbrid Coordinate Ocean Model website (HYCOM) 1 and are presented in a spatial resolution of 0.08 • × 0.08 • at the depths of 0, 30, 50, and 100 m, according to the living depth of this species (Roper et al, 1984;Tomano et al, 2016;Ammar and Maaroof, 2019). Next, we set the unit of the spatial grid at 0.4 • × 0.4 • to establish the movement pattern because this spatial grid covers the minimum range of squids captured in the adult stage in the present study (Figure 1).…”

Section: Prediction Of Movement Patternsmentioning

confidence: 99%

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Seasonal Movement Patterns of the Bigfin Reef Squid Sepioteuthis lessoniana Predicted Using Statolith δ18O Values

et al. 2020

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Sepioteuthis lessoniana is a widely distributed neritic squid in the Indo-Pacific Ocean. It is an important species in fisheries, but species management is difficult because of inadequate information regarding its life history. The daily growth and δ 18 O values from the core to the edge of statoliths of S. lessoniana collected in northern Taiwan were analyzed to predict the experienced temperature history along with ontogenetic stages. The probability of occurrence in a given area at each life stage in three seasonal groups was determined using salinity values, deduced and measured temperatures, and the known ecology of S. lessoniana. The results showed that ontogenetic variation in the statolith δ 18 O values in S. lessoniana reflected the seasonal temperature fluctuation observed in Taiwanese waters, which indicated the reliability of the prediction method. Complex and diverse distribution and movement patterns were observed in the three seasonal groups. The results also indicated the importance of the waters near the coast of northeastern Taiwan as a spawning ground. Based on a model prediction, the distribution of S. lessoniana is likely associated with water temperature and current. A potential migration route from the Penghu Islands to northeastern Taiwan suggests a high level of population connectivity in S. lessoniana in Taiwan. This study provides information on the spatial and vertical distribution of S. lessoniana at various ontogenetic stages, which is essential for resource management and conservation of this commercial species.

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Section: Prediction Of Ontogenetic Movement and Geographical Distribusupporting

confidence: 83%

Section: Prediction Of Ontogenetic Movement and Geographical Distribumentioning

confidence: 99%

Section: Prediction Of Movement Patternsmentioning

confidence: 99%

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Seasonal Movement Patterns of the Bigfin Reef Squid Sepioteuthis lessoniana Predicted Using Statolith δ18O Values

et al. 2020

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“…Recently S. lessoniana has been discriminated using DNA markers such as partial sequences of mitochondrial cytochrome oxidase subunit I (COX1 or COI) for better stock identity, distribution and stock status (Cheng et al ., 2014; Tomano et al ., 2015, 2016). Cheng et al .…”

Section: Discussionmentioning

confidence: 99%

Age and growth of bigfin reef squid, Sepioteuthis lessoniana (Cephalopoda: Loliginidae), in Gulf of Mannar Marine Biosphere Reserve, Indian Ocean

Kavitha,

Sasikumar,

Linga Prabu

et al. 2024

J. Mar. Biol. Ass.

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Statolith growth increments were analysed in the bigfin reef squid, Sepioteuthis lessoniana lineage B, for estimating the age and growth in the Gulf of Mannar Biosphere Reserve (GOM), southeast coast of India. The identification of S. lessoniana lineage B was determined by mitochondrial cytochrome c oxidase I gene sequence. The statolith increment age analysis indicated that the wild-captured squid population of S. lessoniana in the study area undergoes rapid growth. The age of S. lessoniana in males ranged from 61 (95 mm dorsal mantle length (DML)) to 220 d (390 mm DML), while it was 64 (98 mm DML) to 199 d (340 mm DML) in females. The average daily growth rate in males and females was 1.63 and 1.55 mm DML d−1, respectively. The instantaneous growth rate varied from 0.85 (210 d) to 4.1% (110 d) for males and 0.65 (190 d) to 3.7% (110 d) for females. The age at first maturity was 114 and 120 d for males and females, respectively. Back-calculated hatching dates and the attainment of maturity in females suggested that the reproduction of S. lessoniana is year-round, with two distinct spawning peaks during July–August and February months; accordingly, the hatching dates were spread throughout the year, with the presence of two cohorts. Based on the statolith data, it can be concluded that S. lessoniana lineage B in the GOM has a potential lifespan of up to 7 months. This finding contradicts the previous growth estimates based on length-frequency data, which underestimated the true growth potential of this species.

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“…Oval squid, Sepioteuthis lessoniana Férussac in Lesson, 1830, form a not fully defined species complex 38 . Three members of the species complex are traditionally and routinely recognized by fishermen in Okinawa, Japan, which are morphologically, molecularly, and behaviorally distinct 39 – 45 awaiting a taxonomical revision 46 . Here, we have focused on S. lessoniana sp.2, also called “Shiro-ika” or white-squid.…”

Section: Introductionmentioning

confidence: 99%

Squid adjust their body color according to substrate

Nakajima

Lajbner

Kuba

et al. 2022

Sci Rep

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Coleoid cephalopods camouflage on timescales of seconds to match their visual surroundings. To date, studies of cephalopod camouflage-to-substrate have been focused primarily on benthic cuttlefish and octopus, because they are readily found sitting on the substrate. In contrast to benthic cephalopods, oval squid (Sepioteuthis lessoniana species complex) are semi-pelagic animals that spend most of their time in the water column. In this study, we demonstrate that in captivity, S. lessoniana Sp.2 (Shiro-ika, white-squid) from the Okinawa archipelago, Japan, adapts the coloration of their skin using their chromatophores according to the background substrate. We show that if the animal moves between substrates of different reflectivity, the body patterning is changed to match. Chromatophore matching to substrate has not been reported in any loliginid cephalopod under laboratory conditions. Adaptation of the chromatophore system to the bottom substrate in the laboratory is a novel experimental finding that establishes oval squid as laboratory model animals for further research on camouflage.

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Contribution of Sepioteuthis sp. 1 and Sepioteuthis sp. 2 to oval squid fishery stocks in western Japan

Cited by 11 publications

References 20 publications

Seasonal Movement Patterns of the Bigfin Reef Squid Sepioteuthis lessoniana Predicted Using Statolith δ18O Values

Seasonal Movement Patterns of the Bigfin Reef Squid Sepioteuthis lessoniana Predicted Using Statolith δ18O Values

Age and growth of bigfin reef squid, Sepioteuthis lessoniana (Cephalopoda: Loliginidae), in Gulf of Mannar Marine Biosphere Reserve, Indian Ocean

Squid adjust their body color according to substrate

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