Design and function of closed seawater systems for culturing loliginid squids

Yang, Won Tack; Hanlon, Roger T.; Lee, P.G.; Turk, Philip E.

doi:10.1016/0144-8609(89)90020-4

Cited by 29 publications

(13 citation statements)

References 20 publications

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“…This tank system was similar to others used for the culture of cephalopods (Yang et al 1989;Lee 1994;Lee et al 1998). Experiment 1 lasted 30 days.…”

Section: Methodsmentioning

confidence: 96%

Effect of Artificial Diets on Growth, Survival and Condition of Adult Cuttlefish, Sepia officinalis Linnaeus, 1758

et al. 2005

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The effects of artificial diets on growth and body condition of adult cuttlefish, Sepia officinalis were tested in two experiments. Supplemented prepared diets (fish myofibrillar protein concentrate) were fed during a 30-day and a 21-day experiments. Growth, feeding rate and food conversion of group-reared cuttlefish were analyzed. The first of these experiments tested four artificial diets, made with increasing levels of lysine, on adult cuttlefish. According to the chemical analysis, diets 1-3 had limiting concentrations of lysine and other essential amino acids (compared to mantle composition of the cuttlefish), while diet 4 was the only one where almost all essential amino acids were present in concentrations similar or higher than the ones present in cuttlefish mantle. A second experiment was conducted by isolating 16 adult cuttlefish individually, and feeding them the same four artificial diets, in order to obtain individual data. During Experiment 1, only the diet with the best chemical score (diet 4) produced growth (p < 0.05), with a mean instantaneous growth rate (MIGR) of 0.30% wet body weight (BW) d À1 . Similarly, individually reared cuttlefish fed diet 4 produced the highest IGR's (0.26, 0.38 and 0.48% BW d À1 ) and grew larger (p < 0.01). Comparison of cuttlefish fed the artificial diets vs. thawed shrimp and unfed cuttlefish indicated that cuttlefish fed the artificial diets were in an intermediate state. Growth rates obtained with the artificial diets (<0.4% BW d À1 ) were considerably lower compared to natural prey, live or frozen, reported by other authors.

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“…This tank system was similar to others used for the culture of cephalopods (Yang et al 1989;Lee 1994;Lee et al 1998). Experiment 1 lasted 30 days.…”

Section: Methodsmentioning

confidence: 96%

Effect of Artificial Diets on Growth, Survival and Condition of Adult Cuttlefish, Sepia officinalis Linnaeus, 1758

et al. 2005

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“…After close scrutiny (Hanlon et al 1989), the only variable between experiments that should have affected growth is temperature, which is summarized in Fig. 1.…”

Section: Resultsmentioning

confidence: 99%

“…In our laboratory experiments few animals died of old age, but rather from bacterial infections. Although females were maturing, none reached spawning conditions (Hanlon et al 1989) and it seems that the males may not have lived long enough to out-grow the females as they approached egg-laying.…”

Section: Discussionmentioning

confidence: 99%

Growth of the Eastern Atlantic squid, Loligo forbesi Steenstrup (Mollusca: Cephalopoda)

Forsythe

Hanlon

1989

Aquaculture Res

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Abstract. Loligo forbesi Steenstrup is a commercially and biomedically important species raneing from Scotland to North Africa and from the Azores Islands in the central Atlantic east through the Mediterranean Sea and Red Sea. Eggs were collected from Plymouth. England and from the Azores and the hatchlings were reared Io adult size in recirculating seawater systemsGrowth data were obtained primarily from mortalities during the course of three culture experiments which lasted 360, 240 and 480 days. Loligo forbesi hatched at a size of 5-9mg (3 0-4 6 mm mantle length, ML) and grew to a maximum size of I24g (155 mm ML) in 413 days. In all experiments, growth was exponential in form for at least the first 3 months at rales of 5-8, 5-1 and 3 6% body weight per day (BW/d) at mean temperatures of 141, 14 0 and 131°C respectively. In one short-term experiment, month-old squids grew at 8 0% BW/d at 17 4''CGrowth beyond 3 months was slower and either logarithmic (as described by the power function) or exponential in form. Growth rates gradually declined to 1-2% BW/d, Analyses of mantle length growth confirmed the wet weight results. There was no evidence of sexual dimorphism in the laboratory populations, which were of small size, and the length-weight (L-W) relationships were found to be similar to those of field populations. Growth rates during the exponential growth phase appeared very sensitive to temperature, with a TC difference changing growth rate by 2% BW/d and producing a three-fold difference in weight at 90 days post-hatching. These dramatic effects of temperature on adult size and lifespan in nature are discussed. It is hypothesized that the small size of mature laboratory-reared squids was due to low culture temperatures during the first 3 months.

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“…The animals were maintained in two circular tanks (1 m diameter, 40 cm high; water volume 350 l; for further details, see Yang et al (1989)) in a closed system of recirculating artificial seawater (salinity 35-36%0; pH 8.0-8.4; ammonia nitrogen max. 0.05%0; nitrite nitrogen max.…”

Section: Materials and Methods (A) Experimental Animalsmentioning

confidence: 99%

Structure and function of the Nautilus statocyst

Neumeister

Budelmann

1997

Phil. Trans. R. Soc. Lond. B

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SUMMARYThe two equilibrium receptor organs (statocysts) of Nautilus are ovoid sacks, half-filled with numerous small, free-moving statoconia and half with endolymph. The inner surface of each statocyst is lined with 130 000-150 000 primary sensory hair cells. The hair cells are of two morphological types. Type A hair cells carry 10-15 kinocilia arranged in a single ciliary row; they are present in the ventral half of the statocyst. Type B hair cells carry 8-10 irregularly arranged kinocilia; they are present in the dorsal half of the statocyst. Both type of hair cells are morphologically polarized. To test whether these features allow the Nautilus statocyst to sense angular accelerations, behavioural experiments were performed to measure statocyst-dependent funnel movements during sinusoidal oscillations of restrained Nautilus around a vertical body axis. Such dynamic rotatory stimulation caused horizontal phase-locked movements of the funnel. The funnel movements were either in the same direction (compensatory funnel response), or in the opposite direction (funnel follow response) to that of the applied rotation. Compensatory funnel movements were also seen during optokinetic stimulation (with a black and white stripe pattern) and during stimulations in which optokinetic and statocyst stimulations were combined.These morphological and behavioural findings show that the statocysts of Nautilus, in addition to their function as gravity receptor organs, are able to detect rotatory movements (angular accelerations) without the specialized receptor systems (crista/cupula systems) that are found in the statocysts of coleoid cephalopods. The findings further indicate that both statocyst and visual inputs control compensatory funnel movements.

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Design and function of closed seawater systems for culturing loliginid squids

Cited by 29 publications

References 20 publications

Effect of Artificial Diets on Growth, Survival and Condition of Adult Cuttlefish, Sepia officinalis Linnaeus, 1758

Effect of Artificial Diets on Growth, Survival and Condition of Adult Cuttlefish, Sepia officinalis Linnaeus, 1758

Growth of the Eastern Atlantic squid, Loligo forbesi Steenstrup (Mollusca: Cephalopoda)

Structure and function of the Nautilus statocyst

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