Reproductive strategies in female polar and deep-sea bobtail squid genera Rossia and Neorossia (Cephalopoda: Sepiolidae)

  title={Reproductive strategies in female polar and deep-sea bobtail squid genera Rossia and Neorossia (Cephalopoda: Sepiolidae)},
  author={Vladimir V Laptikhovsky and Chingis M. Nigmatullin and H. J. T. Hoving and B. Onsoy and Alp Salman and Karsten Zumholz and G. A. Shevtsov},
  journal={Polar Biology},
Female reproductive features have been investigated in five polar and deep-sea bobtail squid genera Rossia and Neorossia (R. macrosoma, R. moelleri, R. pacifica, N.c. caroli and N.c. jeannae). These species are characterized by asynchronous ovary maturation, very large eggs (>10% ML), fecundity of several hundred oocytes, very high reproductive output, and continuous spawning with low batch fecundity. This adaptive complex of reproductive traits evolved in these small animals as an optimum… 
Reproductive Biology of the Bobtail Squid Rossia macrosoma (Cephalopoda: Sepiolidea) from the Eastern Mediterranean
Rossia macrosoma was investigated based on material collected from the eastern Mediterranean Sea, to determine potential fecundity, reproductive strategies and size at maturity, and according to egg diameter distributions in gonads, R. macrosoma has asynchronous ovary maturation, spawning more than once.
Reproductive biology of the lentil bobtail squid, Rondeletiola minor (Cephalopoda: Sepiolidae) from the eastern Mediterranean
A total of 208 Rondeletiola minor were sampled from the eastern Mediterranean with the depth contours of 150, 350 and 550 m, and the life cycle of R. minor was estimated to be 10 months with different cohorts in reproduction depending on how temperature affects the hatching.
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.
Reproductive biology of Neorossia caroli (Cephalopoda: Sepiolidae) in the Aegean Sea
It has been observed that the pattern of ovulation of N. caroli is asynchronous and that spawning is continuous and that females appeared to reach larger sizes than males.
Reproductive Biology of Sepiola intermedia (Sepiolidae: Cephalopoda) in the Aegean Sea, Eastern Mediterranean
This study provides new records on the reproductive biology of S. intermedia from the Aegean Sea and determines potential fecundity ranges for females and males to be between 148-406 eggs and 54-383 spermatophores.
Fecundity, oogenesis, and ovulation pattern of southern African Lycoteuthis lorigera (Steenstrup, 1875)
The ovulation pattern of L. lorigera is asynchronous, which indicates a spawning strategy where batches of eggs are spawned repeatedly over time, and the reproductive strategies of oceanic squid inhabiting the continental slope of southern Africa are discussed and compared.
Distribution, abundance, reproduction and ageing of the common bobtail squid Sepietta oweniana (Sepiolidae, Cephalopoda) from the Portuguese Coast
The year-round presence of mature animals, asynchronous ovulation, the presence of maturity specimens over a range of different sizes and the occurrence of feeding activity throughout spawning are indicative of a continuous spawning strategy in this species.
Ovarian development in Argentinean shortfin squid Illex argentinus: group-synchrony for corroboration of intermittent spawning strategy
Modern living cephalopod species have evolved a wide phenotypic diversity and flexibility of reproductive strategies, which is closely linked to the pattern of oogenesis and oocytes ovulation of
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.
The study of deep-sea cephalopods.


Reproductive biology of the Patagonian bobtail squid, Semirossia patagonica (Sepiolidae: Rossiinae) in the south-west Atlantic
Semirossia patagonica is a south-west Atlantic ecological sibling of north-east Atlantic bobtail squids Sepiola spp.
Egg clutch, sperm reservoirs and fecundity of Neorossia caroli (Cephalopoda: Sepiolidae) from the southern Sardinian sea (western Mediterranean)
First observations on reproduction of Neorossia caroli from the southern Sardinian sea are reported, based on the analyses of an egg clutch and specimens collected by bottom trawl on sandy and muddy
Fecundity of the common cuttlefish, Sepia officinalis L. (Cephalopoda, Sepiidae): a new look at an old problem*
Regulative oocyte resorption was observed at early maturation in some cuttlefishes, showing that intermittent spawning, which occurs in captivity, is a normal process in natural habitats.
Reproductive biology of Sepietta oweniana (Pfeffer, 1908) (Sepiolidae: Cephalopoda) in the Aegean Sea*
It was observed that the spawning period of S. oweniana covers the whole year with two maxima in April-May and October-November, and no discernible difference in length frequencies of males and females was observed.
Analysis of fecundity of some bobtail squid of the genus Sepiola (Cephalopoda: Sepiolida) in the Aegean Sea (eastern Mediterranean)
  • A. Salman, Bahadr Önsoy
  • Environmental Science
    Journal of the Marine Biological Association of the United Kingdom
  • 2004
A total of 39 Sepiola intermedia, Sepiola robusta and Sepiola steenstrupiana samples (11 female, 28 male), from the eastern Mediterranean and the Aegean Sea have been examined. The potential
Aspects of female reproductive biology of the orange-back squid, Sthenoteuthis pteropus (Steenstup) (Oegopsina: Ommastrephidae) in the eastern tropical Atlantic
Results indicate that S. pteropus is a typical representative of the epipelagic oceanic cephalopod reproductive strategy characterised by small eggs, high fecundity, long intermittent spawning, active feeding, and somatic growth during spawning.
First data on fecundity of the squid Abralia veranyi (Cephalopoda: Enoploteuthidae)
  • V. Laptikhovsky
  • Biology
    Journal of the Marine Biological Association of the United Kingdom
  • 1999
Investigation of the fecundity in Abralia veranyi from the Mauritanian slope showed that potential fecundity of this species is 10,000–26,000 including 1200–2400 (mean 1900) yolk oocytes and ripe
Fecundity of the squid "Loligo vulgaris" Lamarck, 1798 (Myopsida, Loliginidae) off northwest Africa
Ovary maturation in mature female L. vulgaris was similar to that observed in other loliginid squid, when small protoplasmic oocytes predominate throughout the life cycle.
Egg laying behaviour of the broad squid, Sepioteuthis bilineata
The behaviour of the squid throughout the procedure of capsule placement is described and a description of the egg mass and the newly hatched squid is also given.
Reproduction in Heteroteuthis dispar (Rüppell, 1844) (Mollusca: Cephalopoda): a sepiolid reproductive adaptation to an oceanic lifestyle
Fecundity of Heteroteuthis dispar (1,100–1,300 oocytes) is much higher than in other sepiolids whereas the egg size (mean max. length ∼1.6 mm) is the smallest within the family.