Reproduction and Larval Development of Danish Marine Bottom Invertebrates, with Special Reference to the Planktonic Larvae in the Sound (Öresund)

Oikos ◽  
1950 ◽  
Vol 2 (1) ◽  
pp. 143
Author(s):  
T. Soot-Ryen ◽  
Gunnar Thorson
Keyword(s):  
Special Reference ◽  
Larval Development ◽  
Planktonic Larvae

scholarly journals The Development and Structure of the Anterior Region of the Body in the Sabellariidae, with special reference to Phragmatopoma californica

1952 ◽  
Vol s3-93 (24) ◽  
pp. 435-452
Author(s):  
R. PHILLIPS DALES
Keyword(s):  
Special Reference ◽  
Larval Development ◽  
The Body ◽  
Anterior Region ◽  
Single Pair ◽  
Phragmatopoma Californica

Attention is drawn to the confusion which has been caused by the loose terminology of the anterior appendages in polychaetes, and more exact connotations are proposed. As the prostomium can be recognized as a comparable unit throughout the Polychaeta, a consideration of its constitution is deferred. In the present paper the development and constitution of the anterior region of the sabellariid worms are considered. The larval development of Phragmatopoma californica (representing the most highly advanced genus) is described, and the structure of the adult of this species is compared with that of species belonging to other genera. It is concluded that the opercular stalk arises mainly from the first segment; that the opercular paleae represent the notochaetae of the first two segments, and that the oral tentacles and the building organ are also developed from the first segment. The prostomium bears a single pair of tentacles.

V - The development of Haliotis Tuberculata , with special reference to organogenesis during torsion

1937 ◽  
Vol 228 (552) ◽  
pp. 219-268 ◽  
Keyword(s):  
Nervous System ◽  
Special Reference ◽  
Larval Development ◽  
Retractor Muscle ◽  
Larval Life ◽  
Free Living ◽  
Larval Stages ◽  
Haliotis Tuberculata ◽  
New Interpretation ◽  
Selection Of

Investigation of the development of Haliotis tuberculata , Linnaeus, was undertaken as a natural sequel to an examination of the bionomics and anatomy of Haliotis (Crofts 1929, p. 159). It is an attempt to elucidate the organogenesis during the changing larval habits, in the hope of adding to the scanty ontogenetical evidence available towards solving the problems of gastropod evolution. Excellent accounts of the embryonic phase, including patiently worked out details of the cleavage and of gastrulation, have been published for Crepidula (Conklin 1897), Patella (Patten 1886; Wilson 1904; and Smith 1935), Trochus (Robert 1902), Physa (Wierzejski 1905), Dentalium (Wilson 1904). The only comprehensive accounts of gastropod larval development already published are of Paludina (Erlanger 1891; Tonniges 1896; Drummond 1902; Andersen 1924) and of Patella (Patten 1886; Smith I935). The accounts of Paludina elucidate the details of development of the coelom and its derivatives. The viviparous habit and consequent loss of free larval life in Paludina , however, make it a very unsuitable example of gastropod development. Evolutionary stages are more likely to be traced from the development of less specialized gastropods, an adequate selection of whose free-living larval stages can be obtained. The larval development of Patel, Acmaea, Trochus and Haliotis has been described, in varying completeness for the different genera. Patten’s work on Patella coerulea (1886) gives a description only of the beginning of organogenesis. After a lapse of fifty years a more detailed account of the development of P. vulgata has been given by Smith (1935). This work gives a new interpretation of the development of the mesoderm, of the muscles and of the nervous system. The dorsal retractor muscle of the larva, which Patten indicated for P. coerula , is shown in P. vulgata to be placed asymmetrically and torsion takes place “ under the action” of this muscle.

The life-histories of the bivalves Montacuta substriata and M. ferruginosa, ‘commensals’ with spatangoids

1966 ◽  
Vol 46 (3) ◽  
pp. 499-511 ◽  
Author(s):  
John Gage
Keyword(s):  
Special Reference ◽  
Life Histories ◽  
Larval Stages ◽  
Planktonic Larvae ◽  
Settlement And Metamorphosis ◽  
Planktotrophic Larvae

The life-histories of the erycinaceans Montacuta substriata and M. ferruginosa were investigated with special reference to the initiation of their ‘commensal’ associations. The planktotrophic larvae are released in summer as veligers after incubation within the adults, and they may spend several months in the plankton before settlement and metamorphosis. Larvae of both species, isolated from the Plymouth plankton, were reared to post-larval stages that were comparable with spat found associated with spatangoids. Some corrections are made of the identifications of planktonic larvae, of these and other Erycinacea, by previous authors. Experiments showed that, apart from being more active, the responses of walking post-larvae are similar to those I have described previously with adults. It is considered that the reactions operate, in an integrated manner similar to the adults, in initiating their associations with spatangoids; the behaviour of the adults in maintaining and re-establishing their associations would thus represent a retention of larval faculties. Possible reasons for the restriction of M. substriata to superficial burrowers and the less specific occurrences of small M. ferruginosa amongst spatangoids—including both deep and shallow-burrowing species—are discussed.

Larval development, sensory mechanisms and physiological adaptations in acorn barnacles with special reference to Balanus amphitrite

2010 ◽  
Vol 392 (1-2) ◽  
pp. 89-98 ◽  
Author(s):  
Arga Chandrashekar Anil ◽  
Lidita Khandeparker ◽  
Dattesh V. Desai ◽  
Lalita V. Baragi ◽  
Chetan A. Gaonkar
Keyword(s):  
Special Reference ◽  
Larval Development ◽  
Balanus Amphitrite ◽  
Physiological Adaptations ◽  
Sensory Mechanisms

Algal associations of Tricolia pullus, Lacuna vincta and Cerithiopsis tubercularis (Gastropoda) with special reference to the settlement of their larvae

1977 ◽  
Vol 57 (4) ◽  
pp. 999-1017 ◽  
Author(s):  
V. Fretter ◽  
R. Manly
Keyword(s):  
Special Reference ◽  
Positive Response ◽  
Mass Mortality ◽  
Lacuna Vincta ◽  
Sea Bed ◽  
Algal Associations ◽  
Planktonic Larvae

More than half of the species of British prosobranchs living intertidally have planktonic larvae. Settlement involves a positive response to certain factors which results in a speedy loss of structures fulfilling larval needs and the introduction of others associated with locomotion and feeding on the sea-bed (Fretter, 1972). Unless this response relates to the needs of the species, settlement could lead to mass mortality of larvae settling on unsuitable ground.

Complete larval development of Thenus unimaculatus Burton & Davie, 2007 (Decapoda, Scyllaridae)

Crustaceana ◽  
2014 ◽  
Vol 87 (5) ◽  
pp. 570-584 ◽  
Author(s):  
Joe K. Kizhakudan ◽  
S. Krishnamoorthi
Keyword(s):  
Survival Rate ◽  
Larval Development ◽  
Average Duration ◽  
Juvenile Stage ◽  
Laboratory Studies ◽  
Larval Stages ◽  
Planktonic Larvae

Larval development of the shovel-nosed lobster Thenus unimaculatus Burton & Davie, 2007 is described based on laboratory studies. The larval stages included four stages of phyllosoma (I-IV), followed by a post larval, non-feeding nisto stage which metamorphosed to the juvenile stage, also known as first seed. The nisto stage is reached in 26-30 days, the average duration of each phyllosoma (I-IV) and nisto was 7, 5, 7, 7 and 4 days, respectively. The phyllosomas are characteristically flattened, leaf-like, transparent planktonic larvae, while the nisto, translucent in appearance, remains sedentary at the bottom. The first juvenile stage has a hard exoskeleton and feeds on fresh clam meat. The survival rate from phyllosoma I to nisto was 22%.

Sign in / Sign up

Export Citation Format

Share Document