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  • 1
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    Some aspects of social interaction during feeding in Sepia officinalis (Mollusca: Cephalopoda) hatched and reared in the laboratory (1994)
    Laboratoire Arago
    In:  Vie et milieu, 44 (2). pp. 125-131.
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    Publikationsdatum: 2020-04-28
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  • 2
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    The littoral Ascidians of the Spanish mediterranean. II. Balearic Islands. Species collected by the R/V "Professeur Georges Petit" (1991)
    Laboratoire Arago
    In:  Vie et Milieu, 41 (2-3). pp. 153-163.
    Details
    Publikationsdatum: 2020-04-29
    Beschreibung: An inventory of the rocky infra- and circalittoral bottoms of the Balearic Islands (Spanish Mediterranean), based on SCUBA diving studies performed in 1986, led to a list of 60 ascidian species in this region. Systematic, ecological and biological notes on these species are given in this article.
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  • 3
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    Sepiolinae (Mollusca, Cephalopoda) from the Ligurian Sea (1989)
    Laboratoire Arago
    In:  Vie et milieu, 39 (3/4). pp. 183-190.
    Details
    Publikationsdatum: 2020-04-28
    Beschreibung: A collection of 130 specimens of Sepiola (ligulata, robusta, rondeletii, intermedia), 115 Rondeletiola minor, 90 Sepietta ( obscura, neglecta) and more abundant samples of S. oweniana obtained by trawl fishing in the Ligurian Sea are briefly illustrated in terms of depth distribution, sex ratio and maturity stages.
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  • 4
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    Pigments of some symbiotic cyanobacteria (1988)
    Laboratoire Arago
    In:  Vie et Milieu, 38 (3-4). pp. 251-258.
    Details
    Publikationsdatum: 2020-04-29
    Beschreibung: This investigation contribute to our knowledge of the pigment content of certain previously described Cyanophycea found in symbiotic association with sponges and ascidians (Duclaux, 1977; Lafargue and Duclaux, 1979). It is opportunity to test the hypothesis of a single symbiont Synechocystis trididemni Lafargue and Duclaux associated both with Trididemnum cyanophorum Lafargue and Duclaux and T. tegulum. Phycoerythrin characteristics suggest that T. cyanophorum contains a cyanophyte symbiont which is different from the cyanophyte symbiont of T. tegulum.
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  • 5
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    First report of Prochloron in association with the genus Polysyncraton, didemnid ascidian (Tunicata) (1988)
    Laboratoire Arago
    In:  Vie et Milieu, 38 (2). pp. 145-148.
    Details
    Publikationsdatum: 2020-04-29
    Beschreibung: This is the first report of Prochlorophyta in association with the genus Polysyncraton, a Didemnid Ascidian (Tunicata). The species P. bilobatum Lafargue, 1968 is common near Galapagos islands as well on the European and the West-African coasts. It is a key species in the evolutive line of the Didemnidae in the French coast and probably in the world.
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  • 6
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    On egg and capsule dimensions in Loligo forbesi (Mollusca: Cephalopoda): A note (1987)
    Laboratoire Arago
    In:  Vie et Milieu, 37 (3/4). pp. 187-192.
    Details
    Publikationsdatum: 2020-04-28
    Beschreibung: Laboratory observations on egg size and change of capsule dimensions during embryonic development of Loligo forbesi are reported and compared with Loligo vulgaris. Shipboard observations made on freshly caught live L. forbesi permitted records of settling and recovery of freshly laid egg capsules.
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  • 7
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    Rhynchoteuthion larvae from New Zealand coastal waters (cephalopoda: ommastrephidae) (1986)
    Laboratoire Arago
    In:  Vie Milieu, 36 (3). pp. 177-183.
    Details
    Publikationsdatum: 2020-04-28
    Beschreibung: Rhynchoteuthion stage ommastrephid larvae from New Zealand coastal waters were measured and the developing proboscis studied by scanning electron microscope. Many specimens show some retraction of the head and posterior mantle. Mantle shape is frequently cylindrical anteriorly and slightly expanded posteriorly. Arm 2 is generally longer than arm 1 after 2 mm dorsal mantle length (DML). Arm 3 develops around 2.0 mm DML but is too variable to include in an arm formula. Arm 4 develops around 2.4 mm DML. The proboscis tip bears 8 approximately equal sized suckers, evenly spaced and similarly orientated. The mean tentacle index prior to separation at the base is 3.74 .+-. 1.42 (1 std dev) n = 32. The proboscis is usually longer than all arms in length until 4.0 mm DML. Splitting of the proboscis base commences around 5.0 mm DML and earliest complete separation was observed at 8.4 mm DML. It is believed these larvae belong to Nototodarus sloani and Nototodarus gouldi.
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  • 8
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    Aspects of feeding, growth and survival of the European squid, Loligo vulgaris Lamarck, 1799, reared through the early growth stages (1986)
    Laboratoire Arago
    In:  Vie et Milieu, 36 (1). pp. 9-13.
    Details
    Publikationsdatum: 2020-04-28
    Beschreibung: Loligo vulgaris was reared to a maximal size of 75 mm dorsal mantle length and 28.2 g wet weight. Experiments lasting up to 140 days permitted obser vations on feeding densities, feeding preferences and grovvth rate. Hatchling mortality was very high; between 50 and 100 percent of the dead squids were missing statoliths which are needed for swimming and orientation. The growth results are compatible with the concept of a one-year life cycle for this species.
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  • 9
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    The littoral ascidians of the Spanish mediterranean. I. From Port Bou to the Islas Medas (1986)
    Laboratoire Arago
    In:  Vie et Milieu, 36 (2). pp. 133-139.
    Details
    Publikationsdatum: 2020-04-29
    Beschreibung: An inventory of the rocky infra- and circalittoral zone between Port Bou and the Isias Medas (NE-Spanish coast), based on 140 SCUBA dives in July 1985, led to the listing of 58 ascidian species for this region. In this article we present some data on the bionomical distribution of the species and biological observations.
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  • 10
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    Growth and distribution of young Mesonychoteuthis hamiltoni Robson (Mollusca: cephalopoda): an antarctic squid (1985)
    Laboratoire Arago
    In:  Vie et Milieu, 35 (3/4). pp. 223-230.
    Details
    Publikationsdatum: 2020-04-28
    Beschreibung: Thirty seven juvenile specimens and one adult specimen of the cranchiid squid Mesonychoteuthis hamiltoni were captured by the opening and closing RMT8 net during RRS ‘Discovery’ cruise 100 (1979) in the Southern Ocean. The collection extends the size ränge of juveniles of this species previously described and illustrated. The small specimens resemble small juveniles of Galiteuthis glacialis, which also occur in most hauls, but are separated on the following characters : (a) M. hamiltoni lacks paired tubercles at the nuchal mantle fusion, (b) M. hamiltoni possesses a more capacious and thicker mantle, which is freer at the nuchal fusion and less constricted posterior to the opening; (c) juvenile M. hamiltoni up to a size of 26.5 mm (the largest in the present collection) have very small fins, while in G. glacialis of this size the posterior portion of the mantle has begun to extend into a tail and prominent fins appears; (d) M. hamiltoni has longer tentacles until it reaches a dorsal mantle length of approximately 25 mm. All specimens of M. hamiltoni were captured to the south of the Antarctic Convergence, and most were captured at depths between 20 m and 500 m apparently concentrated in the upper zone of ‘Warm Deep Water’ beneath the surface layer. Four newly hatched specimens were captured at 55°35’S between 20 and 500 m. The adult specimen was captured in a haul which had sampled a depth horizon from 2 000 m to 2 200 m.
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  • 11
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    Field and laboratory behavior of "macrotritopus larvae" reared to Octopus defilippi Verany, 1851 (Mollusca: Cephalopoda) (1985)
    Laboratoire Arago
    In:  Vie et Milieu, 35 (3/4). pp. 237-242.
    Details
    Publikationsdatum: 2020-04-28
    Beschreibung: Seventeen advanced macrotritopus “larvae” from 7 to 15 mm mantle length were attracted to underwater lights in St. Croix, U.S. Virgin Islands. Their behavior was observed in situ, then seven were captured alive and one female was reared to an adult Octopus defilippi. The characteristic long arms of the planktonic young appear to function in flotation, feeding, crawling and defense. There is evidence that larger macrotritopus may be planktonic by night and benthic by day; thus the transition from a planktonic to benthic life may be controlled to ensure widespread distribution on to a suitable habitat. Morphological examination of 106 specimens from the Atlantic indicate that all macrotritopus “larvae” from this ocean are O. defilippi.
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  • 12
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    Laboratory rearing of rhynchoteuthions of the ommastrephid squid Illex illecebrosus (Mollusca: Cephalopoda) (1985)
    Laboratoire Arago
    In:  Vie et Milieu, 35 (3/4). pp. 243-246.
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    Publikationsdatum: 2020-04-28
    Beschreibung: A methodology is presented for obtaining egg masses from captive populations of the ommastrephid squid Illex illecebrosus and for incubating them intact under controlled conditions. Survival of rhynchoteuthion larvae for 9 days after hatching is the best reported to date, though it has not yet been possible to induce feeding. Factors critical to rearing success are discussed, e.g. tank size, stocking density, turbulence, light levels and photoperiod, as well as food type and concentration.
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  • 13
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    Can rhynchoteuthions suspension feed? (Mollusca: Cephalopoda) (1985)
    Laboratoire Arago
    In:  Vie et Milieu, 35 (3/4). pp. 267-271.
    Details
    Publikationsdatum: 2020-04-28
    Beschreibung: The unique rhynchoteuthions of the ommastrephid squids are the smallest decapodan cephalopod hatchlings and have never been successfully reared. Based on anatomical and behavioural observations a mechanism of suspension feeding is proposed which depends on direct interception and inertial impaction on the mucus coated body surface. Mucus is transferred to the mouth area by ciliary motion and by observed cleaning behaviours. Suspension feeding is suggested to be a supplement to raptorial feeding but may be a critical "bridge" between small yolk reserves and the minimum development required for effective predation. Loss of ciliature through contact with vessel walls may prevent feeding in culture.
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  • 14
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    The larvae of Ommastrephid squids (Cephalopoda, Teuthoidea) from Hawaiian waters (1985)
    Laboratoire Arago
    In:  Vie et Milieu, 35 (3/4). pp. 211-222.
    Details
    Publikationsdatum: 2020-04-28
    Beschreibung: Rhynchoteuthion larvae of three species of ommastrephid squids from Hawaiian waters were identified, and aspects of their ecology examined. Important taxonomic characters for field Identification include the number and location of photophores, length of the proboscis (fused tentacles), size at which the proboscis completely divides and the relative sizes of the suckers on the proboscis tip. Other taxonomic characters include sucker structure and chromatophore patterns. Variation among species were found in both temporal and vertical distributions.
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  • 15
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    The distribution of larvae of the genus octopoteuthis ruppell, 1844 (Cephalopoda, Teuthoidea) (1985)
    Laboratoire Arago
    In:  Vie et Milieu, 35 (3/4). pp. 175-179.
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    Publikationsdatum: 2020-04-28
    Beschreibung: While carrying out a systematic revision of the pelagic squid genus Octopoteuthis, the author examined 146 “larval” specimens of the genus from museum sources worldwide. Individuals could not be separated into species but morphometric and meristic characters were examined giving information on ontogenetic development. Specimens ranged in size from 1.3 to 27.0 mm dorsal mantle length (DML) and represented locations in the Atlantic, Pacific and Indian Oceans and also the Mediterranean Sea. Captures were made with a variety of trawls and plankton nets. The deepest record from a closing net was 1 200 m using a MOCNESS system. The largest group examined totalling 105 individuals was collected in the North Atlantic. In the Atlantic the highest larval occurence was found to be in March, April, and June (which may reflect higher sampling pressure in those months) but specimens were obtained in all months except January and December. Low numbers in each of the other oceans prohibited an evaluation of yearly larval distribution.
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  • 16
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    General patterns in the summer distribution of early juvenile ommastrephid squid off eastern Australia (Mollusca, Cephalopoda) (1985)
    Laboratoire Arago
    In:  Vie Milieu, 35 (3/4). pp. 163-168.
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    Publikationsdatum: 2020-04-28
    Beschreibung: Larval squid were sampled in three surveys off the eastern Australian coast in January, March and May 1983. Ommastrephid larvae were abundant and occurred at over 90 % of stations. Although Identification to species level has not so far been possible for the majority of specimens, general patterns of distribution with respect to latitude and bottom depth are presented.
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