The embryonic phase and its implication in the hatchling size and condition of Atlantic bobtail squid Sepiola atlantica

  title={The embryonic phase and its implication in the hatchling size and condition of Atlantic bobtail squid Sepiola atlantica},
  author={Marcelo Rodrigues and {\'A}ngel Guerra and Jes{\'u}s Souza Troncoso},
  journal={Helgoland Marine Research},
Early life stages of cephalopods are somewhat complex due to the life history strategy or species specificity of generalized ontogenetic patterns and processes. This work aimed to determine the time length of embryonic development at different temperatures, and if the egg size is a determinant of hatchling size in Sepiola atlantica d′Orbigny, 1839–1842. Successful hatching occurred in 98.5–100% of the eggs for each female. As seen in other coleoid cephalopods, temperature determines the amount… 

Effect of Cadmium on the Embryonic Development and Hatching Rhythm of Big Fin Squid Sepioteuthis lessoniana, Lesson (1830) from Palk Strait,East Coast of India

The present concentration exhibited toxic effects to the eggs and paralarvae of S. lessoniana and Cd level as high as it was used in this study could give good information on dangerous Cd levels on squid.

Reproduction of the Atlantic bobtail squid Sepiola atlantica (Cephalopoda: Sepiolidae) in northwest Spain

Females of S. atlantica have group-synchronous ovary maturation, with a positive correlation between female mantle length and ripe oocyte mass, suggesting a terminal investment strategy.

The early life history of two sympatric New Zealand octopuses: eggs and paralarvae of Octopus huttoni and Pinnoctopus cordiformis

The morphological traits described in hatchlings from the laboratory allowed comparisons with field-collected paralarvae, suggesting that such characters were reliable species-specific patterns to enable a consistent differentiation between the early life stages of these two sympatric species, even in the absence of the brooding female.

Cephalopod embryonic shells as a tool to reconstruct reproductive strategies in extinct taxa

An exhaustive study of existing data on the relationship between egg size and maximum size of embryonic shells in 42 species of extant cephalopods demonstrated that these values are approximately

Transitions during cephalopod life history: the role of habitat, environment, functional morphology and behaviour.

Mating behaviour and general spawning patterns of the southern dumpling squid Euprymna tasmanica (Sepiolidae): a laboratory study

It is found that male E. tasmanica increase the number of ‘pumps’ (mantle contractions) when mating with females that had recently mated, showing that males are able to determine the recent mating history of females.

Beak measurements of the Atlantic bobtail squid Sepiola atlantica (Cephalopoda: Sepiolidae): appropriate predictors of its body size and weight

This work provides the relationships between nine mandible (beak) measurements and dorsal mantle length (ML), body mass (BW) and sex of 101 specimens (22 juveniles, 35 females, 44 males) of the

On the spermatophore implantation in bobtail squid Rossia macrosoma (Cephalopoda: Mollusca)

In this study, mated female specimens of Rossia macrosoma from the Aegean Sea were examined and spermatangia could be implanted in females’ tissue autonomously by major role of the spiral filament located on the oral part of sperMatangia.

Life strategies of cephalopod paralarvae in a coastal upwelling system (NW Iberian Peninsula): insights from zooplankton community and spatio‐temporal analyses

The early life stages of cephalopods - octopods, squids, sepiolids and ommastrephids -, are uncommon in zooplankton samples and little is known about their life strategies. Accordingly, cephalopod

The behavioural ecology of Sepiolidae (Cephalopoda: Sepiolida): a review

  • C. Drerup
  • Biology, Environmental Science
    Molluscan Research
  • 2022
This review summarises current knowledge on sepiolid behavioural ecology and life history, including discussions on their habitat, life span, activity patterns, hunting and feeding behaviour, anti-predator behaviour, burying behaviour, and reproductive behaviour.



Biology of early life stages in cephalopod molluscs.

  • S. von Boletzky
  • Environmental Science, Biology
    Advances in marine biology
  • 2003
Investigations into dispersal and recruitment are of particular interest to fishery biology, but they are also important for ecological biogeography.

Laboratory Culture, Growth, and the Life Cycle of the Little Cuttlefish Sepiola atlantica (Cephalopoda: Sepiolidae)

Data indicate that S. atlantica has a similar life cycle to other scpioids and that laboratory-reared juveniles matured and successfully mated, but the females did not lay any eggs.

Spawning strategy in Atlantic bobtail squid Sepiola atlantica (Cephalopoda: Sepiolidae)

The data suggest that S. atlantica is an intermittent terminal spawner, and that its spawning strategy comprises group-synchronous ovary maturation, multiple egg laying, and deposition of egg clutches in different locations.


The bobtail squid, Euprymna hyllebergi, was cultured in the laboratory through three generations, and cannibalism was observed in culture tanks and growth was similar among the three generations.

Egg size, fecundity, and spawning in females of the genus Illex (Cephalopoda: Ommastrephidae)

The squids genus Illex is one of typical r-strategists among the cephalopods and ripe egg production decreases over time with only a 50% replacement of the initial stock of vitelline oocytes and a decreasing volume of eggs at each release.

Biology of the planktonic stages of benthic octopuses

Most of the understanding of octopus paralarvae comes from studies of just two species (Octopus vulgaris and Enteroctopus dofleini) and knowledge of the vast majority of benthic octopus species with planktonic stages is considered rudimentary or non-existent.

Are bigger calamary Sepioteuthis australis hatchlings more likely to survive? A study based on statolith dimensions

There is an element of size-mediated mortality operating on populations of S. australis, suggesting that bigger hatchlings are more likely to survive to adulthood than smaller hatchlings.


The smallest living cephalopods are coleoids weighing less than 1 gram when adult (the pygmy squid Idiosepius spp., several pygmy species of the genus Octopus), and there are slightly larger species

Mating behavior of the Atlantic bobtail squid sepiola atlantica (Cephalopoda: sepiolidae)

The mating behavioral pattern of the bobtail squid (Sepiola atlantica) was observed and described for the first time in laboratory conditions and a comparison of the mating pattern of this species with other members of the family Sepi- olidae is made.