Reproduction in Heteroteuthis dispar (Rüppell, 1844) (Mollusca: Cephalopoda): a sepiolid reproductive adaptation to an oceanic lifestyle
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Small cephalopods of the genus Heteroteuthis are the most pelagic members in the family Sepiolidae. This study examines the reproductive biology of Heteroteuthis dispar (Rüppell, 1844), the first such study on any member of the genus, based on 46 specimens (27 females and 19 males) collected during the Mar-Eco cruise in the North Atlantic in the region of the Mid-Atlantic Ridge in 2004, and compares it with reproductive features in the less pelagic members of the family. The unusually large spermatophores of the males have a very small ejaculatory apparatus and cement body, relative to the size of the sperm mass. Females first mate when they are still maturing: a large sperm mass (up to 3.4% of the female body mass), consisting of one to several spermatangia, was found in an internal seminal receptacle of the majority of the females examined regardless of their maturity state. The seminal receptacle has a unique form and position in this species. The receptacle is a thin-walled sac at the posterior end of the visceral mass that is an outpocketing of, and opens into, the visceropericardial coelom. Spermatangia and sperm from the spermatangia apparently enter into the visceropericardial coelom (which is mostly occupied by the ovary) from the seminal receptacle indicating that ova are fertilised internally, a strategy unknown for decapodiform cephalopods (squid and cuttlefish), but present in most octopods. 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. Spawning is continuous (sensu Rocha et al. in Biol Rev 76:291–304, 2001). These and other reproductive traits are discussed as being adaptations to an oceanic lifestyle.
KeywordsSeminal Receptacle Male Reproductive System Oocyte Size Bursa Copulatrix Oviducal Gland
The valuable help of and the fruitful discussions with Dr. R.E. Young during dissections on H. dispar in Bergen Museum are greatly appreciated. Also comments by Dr. R.E. Young on an earlier draft of this paper greatly improved the quality of the manuscript. Mar-Eco and the Census of Marine Life are thanked for financial support during the workshop in Bergen University Museum and for the collection of the animals. The staff of the Bergen Museum of Natural History is thanked for their help during the workshop. Mr. Odo Wieringa of the pathology and histology department (University Medical Centre Groningen) is thanked for the preparation of histological sections of the hectocotylus. Deniz Haydar is thanked for her help with the illustrations and the English language.
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- Alexeev FE, Alexeeva EI (1981) Some aspects of the reproductive biology in oceanic and neritic tuna (Scombridae) of Tropical Atlantic. Vopr Ihtiol 21(5):853–866 (in Russian)Google Scholar
- Bello G (1991) Role of cephalopods in the diet of the swordfish, Xiphias gladius, from the eastern Mediterranean Sea. Bull Mar Sci 49:312–324Google Scholar
- Bello G (1995) A key for the identification of the Mediterranean sepiolids (Mollusca: Cephalopoda). Bull Inst Oceanogr Monaco, n° spéc. 16:41–55Google Scholar
- Bello G (1997) Teuthophagous predators as collectors of oceanic cephalopods: the case of the Adriatic Sea. Boll Malacol 32:71–78Google Scholar
- Boletzky Sv (1978) Premières données sur le développement embryonnaire du Sépiolide pelagique Heteroteuthis (Mollusca, Cephalopoda). Haliotis 9:81–84Google Scholar
- Boletzky Sv (1983) Sepiola robusta. In: Boyle PR (ed) Cephalopod life cycles. Academic Press, London, pp 53–67Google Scholar
- Fort G (1937) Le spérmatophore des Cephalopodes. Étude du spérmatophore d’Eledone cirrhosa Lam. Bull Biol Fr Belg 71:357–373Google Scholar
- Gabel-Deickert A (1995) Reproductive patterns in Sepiola affinis and other Sepiolidae (Mollusca, Cephalopoda). Bull Inst Oceanogr Monaco, n° spéc. 16:73–83Google Scholar
- Hanlon RT, Messenger JB (eds) (1996) Cephalopod behavior. Cambridge University Press, Cambridge, p 232Google Scholar
- Lefkaditou E, Papaconstantinou C, Anastasopoulou K (1999) Juvenile cephalopods collected in the midwater macroplankton over a trench in the Aegean Sea (Northeastern Mediterranean). Isr J Zool 45:395–405Google Scholar
- Mangold-Wirz K (1963) Contribution a l’étude de Rossia caroli Joubin. Vie Milieu 14:205–224Google Scholar
- Naef A (1923) Die Cephalopoden, Systematik. Fauna Flora Golf Neapel 35(1):1–863Google Scholar
- Nesis KN (1985) Oceanic cephalopod molluscs. Nauka, Moscow, p 285 (in Russian)Google Scholar
- Nesis KN (1993) Cephalopods of seamounts and submarine ridges. In: Okutani T, O'Dor RK, Kubodera T (eds) The recent advances in cephalopod fishery biology. Tokai University Press, Tokyo, pp 365–373Google Scholar
- Nigmatullin CM, Laptikhovsky V (1994) Reproductive strategies in the squids of the family Ommastrephidae (preliminary report). Ruthenica 4(1):79–82Google Scholar
- Okutani T, Tsuchida S (2005) Occurrence and living habit of bathyal bobtail squid, Heteroteuthis hawaiiensis (Cephalopoda: Sepiolidae) from off the Ogasawara Islands, Japan. http://www.tolweb.org/Heteroteuthis/20030
- Orsi-Relini L (1995) Notes on midwater collections of Heteroteuthis dispar (Cephalopoda, Sepiolidae). Bull Inst Oceanogr Monaco, n° spéc. 16:63–72Google Scholar
- Racovitza ÉG (1894) Sur l’accouplement de quelques Céphalopodes Sepiola rondeleti (Leach), Rossia macrosoma (delle Chiaje) et Octopus vulgaris (Lam.). C R Hebd Seances Acad Sci Paris Series D 118:722–724Google Scholar
- Reid A (1991) Taxonomic review of the Australian Rossiinae (Cephalopoda: Sepiolidae), with a description of a new species, Neorossia leptodons, and redescription of N. caroli (Joubin, 1902). Bull Mar Sci 49(3):748–831Google Scholar
- Reid A, Jereb P (2005) Family Sepiolidae Leach, 1817. In: Jereb P, Roper CFE (eds) Cephalopods of the world. An annotated and illustrated catalogue of cephalopod species known to date, vol 1(4). Chambered Nautiluses and Sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae). FAO, Rome, pp 153–203Google Scholar
- Roper CFE (1974) Vertical and seasonal distribution of pelagic cephalopods in the Mediterranean Sea. Preliminary report. Bull. Am. Malacol. Union, pp 27–30, May 1974Google Scholar
- Sartor P, De Ranieri S (1995) Heteroteuthis dispar (Ruppell, 1844) (Cephalopoda, Sepiolidae) nella dieta di due selaci batiali nel Mar Tirreno settentrionale. Biol Mar Medit 2(2):517–518Google Scholar
- Vecchione M, Young RE, Piatkowski U (2008) Cephalopods of the northern mid-Atlantic Ridge (submitted)Google Scholar
- Villanueva R (1995) Distribution and abunandance of bathyal sepiolids (Mollusca: Cephalopoda) in the northwestern Mediterranean. Bull Inst Oceanogr Monaco, n° spéc. 16:19–26Google Scholar
- Young RE (1977) Bioluminescent countershading in midwater cephalopods. Proc Zool Soc Lond 38:161–190Google Scholar
- Young RE, Roper CFE, Vecchione M (2004) Heteroteuthinae Appellof, 1898 http://www.tolweb.org/Heteroteuthinae/20027
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