Maintenance and maturation of squid (illex illecebrosus in a 15 meter circular pool
TLDR
The rapid sexual maturation observed and the small size of eggs ready to be spawned indicates that the one year life cycle previously proposed for Illex illecebrosus is feasible.Abstract:
1. Female specimens of Illex illecebrosus of 20 to 28 cm mantle lengths lived, fed and grew in a 15 m diameter pool for periods up to 82 days; deaths during the first week were associated with skin damage during capture and those after the eighth week with precocious sexual maturation.2. Under the conditions described, squid survived repeated capture and urethane anesthesia, as well as tattooing and surgical procedures. Techniques for handling are described.3. Although the cause of early maturation is not certain, squid entering the pool were exposed to increased photoperiods, and a relationship is hypothesized between this stimulus and the natural November spawning migration.4. The rapid sexual maturation observed and the small size of eggs ready to be spawned indicates that the one year life cycle previously proposed for Illex illecebrosus is feasible.read more
Citations
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The constraints on cephalopods: why squid aren't fish
Ronald K. O’Dor,Dale M. Webber +1 more
TL;DR: The basic inefficiency of the jet-propulsion system has required bioenergetic, physiological, and biochemical adaptations in squid which maximize their metabolic rates, which resulted in the short life history and semelparous reproductive patterns that seem to characterize these coleoid cephalopods.
Journal ArticleDOI
Cephalopod populations: definition and dynamics
P. R. Boyle,S. v. Boletzky +1 more
TL;DR: The extent and scale of the interactions between cephalopod populations and other trophic levels suggests that major ecological perturbations such as environmental shifts, or imposed effects such as commercial fishing, whether directed at cepHalopods or other species, are likely to have an impact on their populations.
Journal ArticleDOI
Ethical and welfare considerations when using cephalopods as experimental animals
Natalie A. Moltschaniwskyj,Karina C. Hall,Marek R. Lipinski,José Eduardo A. R. Marian,M. K. Nishiguchi,Mitsuo Sakai,D.J. Shulman,Billy Sinclair,David L. Sinn,Michelle D. Staudinger,R. Van Gelderen,Roger Villanueva,K. Warnke +12 more
TL;DR: This review collates recent literature in which authors have used cephalopods as experimental animals, revealing the extent of use and diversity of cEPhalopod species and techniques and highlights several major issues.
Journal ArticleDOI
Survival, growth, and behavior of the loliginid squids loligo plei, loligo pealei, and lolliguncula brevis (mollusca: cephalopoda) in closed sea water systems.
TL;DR: Key factors for laboratory survival were prevention of skin damage, tank systems with sufficiently large horizontal dimensions, high quality water, ample food supply, no crowding, and maintaining squids of similar size to reduce aggression and cannibalism.
Journal ArticleDOI
Monitoring the Metabolic Rate and Activity of Free-Swimming squid With Telemetered Jet Pressure
Dale M. Webber,Ronald K. O’Dor +1 more
TL;DR: In this paper, a differential pressure transducer linked to an ultrasonic transmitter carrying average pressure data encoded on impulse frequency was designed to be carried inside the mantle cavity of a free-swimming squid.
References
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Journal ArticleDOI
Mating behavior and social structure in loligo pealii
TL;DR: Observations of Loligo pealii have shown the egg mass can stimulate sexual behavior, which results in copulation and egg-laying; thus a method for obtaining naturally laid eggs has been revealed.
Journal ArticleDOI
The culture and maintenance of the loliginid squids Sepioteuthis sepioidea and Doryteuthis plei
TL;DR: Experimental data indicate a lethal minimum salinity for both species at about 27‰, and opaque tanks, with a semi-natural bottom substrate and special ultra-violet (UV) illumination, are advantageous for rearing and maintenance.
Journal ArticleDOI
Vertical distribution of cephalopods at 18°N 25°W in the North Atlantic
Malcolm R. Clarke,C. C. Lu +1 more
TL;DR: In this paper, the authors present an analysis of catches made with rectangular midwater trawls (RMTs) in the North Atlantic at about 20°W and at about 60°N, 53°N and 40°N.
Journal Article
Yolk protein synthesis in the ovary of Octopus vulgaris and its control by the optic gland gonadotropin
R. K. O'Dor,MJ Wells +1 more
TL;DR: The combined evidence from these experiments indicates that in Octopus yolk proteins are formed within the ovary-probably by the follicle cells-rather than being synthesized elsewhere and transported through the blood, as in arthropods and vertebrates.
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