Notes on the Life-History of the Polychaete, Dodecaceria fewkesi (nom. n.)

1954 ◽  
Vol 11 (3) ◽  
pp. 326-334 ◽  
Author(s):  
E. Berkeley ◽  
C. Berkeley
Keyword(s):  
Life History ◽  
Sexual Reproduction ◽  
Natural Habitat ◽  
Vancouver Island ◽  
Single Individual ◽  
Stages Of Development ◽  
Male And Female ◽  
New Name ◽  
Early Stages ◽  
History Of

Dodecaceria fewkesi (Fewkes) is a new name for the cirratulid polychaete formerly known as D. pacifica. It builds colonies of calcareous tubes on rock faces in suitable localities on the east and west coasts of Vancouver Island between tide-marks. A sexual reproduction by autotomy followed by regeneration is common and colonies seem to result from a single individual by a repeated operation of this process. Individuals in a given colony are invariably of one sex. Fertile eggs could not be obtained either by mixing ripe oocytes and sperms or by adding sperms to water containing female colonies. They did result from keeping male and female colonies together, provided the colonies had been recently removed from their natural habitat. The early stages of development are described and figured.

LIFE HISTORY STUDIES OF THE TOBACCO FLEA BEETLE, EPITRIX HIRTIPENNIS (MELSHEIMER) (COLEOPTERA: CHRYSOMELIDAE)

1987 ◽  
Vol 22 (3) ◽  
pp. 237-244 ◽  
Author(s):  
W. Davis Martin ◽  
G. A. Herzog
Keyword(s):  
Life History ◽  
Larval Stage ◽  
Flea Beetle ◽  
Pupal Stage ◽  
Adult Emergence ◽  
Adult Longevity ◽  
Male And Female ◽  
Controlled Conditions ◽  
History Of ◽  
The Mean

The life history of the tobacco flea beetle, Epitrix hirtipennis (Melsheimer) (= Epitrix parvula Fab.) was studied under the controlled conditions of 27 ± 2.8°C, 80 ± 6% and a 14L:10D photophase. Eggs matured in ca. 4 days, the larval stage, including 3 instars, developed in 13 days, prepupal development took 3 days and the pupal stage lasted approximately 5 days. There was a 24 day interval between oviposition and adult emergence. Females laid 3.1 eggs/day with a 13 day period between adult emergence and first oviposition. The mean number of total eggs/female was 138.6 ± 14.7. Female oviposition continued until a few days before death and adult longevity was approximately 70 days. A visual means of distinguishing between male and female beetles was also developed.

The Early Stages of Oidaematophorus phaceliae McD. (Lepidoptera: Pterophoridae)

1964 ◽  
Vol 96 (3) ◽  
pp. 538-540
Author(s):  
John Adams Comstock
Keyword(s):  
Life History ◽  
Early Stages ◽  
History Of

AbstractNotes and illustrations of the life history of the pterophorid moth, Oidaematophorus phaceliae McD., are given, and former errors of determination are corrected.

XXI.—The Life-history and Development of Agriolimax agrestis L., the Gray Field Slug.

1939 ◽  
Vol 59 (3) ◽  
pp. 563-597 ◽  
Author(s):  
Robert Carrick
Keyword(s):  
Life History ◽  
Life Histories ◽  
Adult Life ◽  
Single Species ◽  
Functional Changes ◽  
Breeding Habit ◽  
Early Stages ◽  
History Of ◽  
Highly Evolved

Among Gasteropod Molluscs the life-histories and development of the most highly evolved members, the terrestrial Pulmonates, have been less intensively studied than those of more primitive aquatic forms. This has been due in part to the technical difficulties involved in the permanent preparation of material for study, and in part to the fact that the investigator seeking for primitive features of phyletic interest is more likely to find these among more generalised species of Gasteropods than among those which are obviously adapted, both during the early stages of their development and in adult life, to a habitat far removed from the ancestral one.It is the purpose of this paper to present data bearing upon the life-history of a single species of land Pulmonate, Agriolimax agrestis L., to enlarge upon certain aspects of the embryology of this species, and to demonstrate the structural and functional changes of the larva which have accompanied the transition from an aquatic to a terrestrial breeding habit.

scholarly journals XXXI.—The Life-History of Xenopus lævis, Daud

1906 ◽  
Vol 41 (3) ◽  
pp. 789-821 ◽  
Author(s):  
Edward J. Bles
Keyword(s):  
Life History ◽  
Xenopus Laevis ◽  
Early Life ◽  
Early Life History ◽  
General Interest ◽  
Present Communication ◽  
Stages Of Development ◽  
Free Swimming ◽  
History Of

The present communication is intended to be the first of a series dealing with observations on the life-history of the Anura Aglossa and their anatomy at different stages of development. Xenopus lævis, with its small ova and protracted larval free-swimming stages, must necessarily form a basis for the study of the development of that other remarkable Aglossan, Pipa americana. Although the adult Aglossan is an aberrant and specialised Anuran, there are Urodele features in the development of Xenopas which make its embryology of great general interest. These primitive features, combined with others peculiar to the genus, impress a character upon the early life-history of this frog which is widely divergent from that of the Phaneroglossa with small ova.

EARLY STAGES IN THE LIFE HISTORY OF THE COMMON MARINE SHRIMP, PENAEUS SETIFERUS (LINNAEUS)

1949 ◽  
Vol 96 (2) ◽  
pp. 168-172 ◽  
Author(s):  
WILLIAM W. ANDERSON ◽  
JOSEPH E. KING ◽  
MILTON J. LINDNER
Keyword(s):  
Life History ◽  
Early Stages ◽  
Penaeus Setiferus ◽  
Marine Shrimp ◽  
History Of ◽  
The Common

On the life history of Synthesiomyia nudiseta van der Wulp (Diptera, Muscidae), a myiasis-producing fly

Parasitology ◽  
1942 ◽  
Vol 34 (3-4) ◽  
pp. 239-245 ◽  
Author(s):  
L. B. Siddons ◽  
D. N. Roy
Keyword(s):  
Life History ◽  
Present Communication ◽  
Interesting Fact ◽  
Larval Stages ◽  
Early Stages ◽  
History Of

Townsend (1935) has described the egg of Synthesiomyia nudiseta and recorded the interesting fact that the larva forms a cocoon. The larval stages and the puparium do not appear to have been described. That this species was not among the larvae of some unknown muscids described by Banks (1912) is evident from the figures of the-posterior spiracles. The present communication provides an account of all the early stages.

scholarly journals An overview of studies on early life history of fish in Vietnam

2019 ◽  
Vol 41 (2) ◽  
Author(s):  
Tran Duc Hau ◽  
Thanh Trung Tran ◽  
Ta Thi Thuy ◽  
Kinoshita Izumi
Keyword(s):  
Life History ◽  
Early Life ◽  
Early Life History ◽  
Fish Diversity ◽  
Daily Lives ◽  
Early Stages ◽  
National Economic ◽  
History Of ◽  
Local Residents ◽  
National Economic Development

Early stages from fertilized eggs to juveniles are important in the existence and development cycles of fish. At these stages, fish are still not fully developed, and are thus easily affected by environmental factors. Vietnam has a rich fish diversity, with ca. 3000 species, and fishery resources play significantly roles not only in the daily lives of local residents but also in national economic development. Ichthyological studies in Vietnam have focused mainly on matured fish while early life history has so far been less researched. This paper presents an overview of studies in Vietnam related to early stages of fish and provides an orientation for this field in future.  

The life history of Chondrus crispus in culture

1972 ◽  
Vol 50 (5) ◽  
pp. 1055-1060 ◽  
Author(s):  
L. C-M. Chen ◽  
J. McLachlan
Keyword(s):  
Life History ◽  
Second Generation ◽  
Dorsal Surface ◽  
Similar Rate ◽  
Chondrus Crispus ◽  
Basal Disc ◽  
Male And Female ◽  
Rate Of Growth ◽  
History Of ◽  
Sexually Mature

The life history of the rhodophycean alga, Chondrus crispus, was completed in culture in about 20 months. Plants established from tetraspores formed male and female gametophytes and subsequently carposporophytes; carpospores in turn gave rise to plants with mature tetrasporangia. Tetraspores from these resulted in second generation gametophytes. Carpospores of plants from nature developed into tetrasporophytes; gametophytes derived from the tetraspores became sexually mature within a year. Sporophytic and gametophytic plants were, as expected, morphologically similar. Rate of growth of plants in cultures was comparable with published observations made on plants in nature. Preliminary experiments showed that, in culture, regeneration can occur from both the erect frond and the basal disc. In the latter, erect fronds may arise from any point on the dorsal surface of the disc.

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