Aspects of the post-larval life history of Limnadia stanleyana King (Crustacea : Conchostraca)

1968 ◽  
Vol 16 (5) ◽  
pp. 885 ◽  
Author(s):  
JA Bishop
Keyword(s):  
Life History ◽  
Maximum Size ◽  
Isolated Populations ◽  
Growth Rings ◽  
Initial Stage ◽  
History Of ◽  
The Mean ◽  
Genetically Determined ◽  
Larval Life History ◽  
Moulting Cycle

L. stanleyana occurs in some rainwater pools near Sydney, N.S.W.. A study of the life history permits description of some aspects of the growth and morphological variation of the species. No growth rings are formed on the carapace during the initial stage of post-larval development. After this a ring is formed at each moult. Animals moult at regular intervals during the period of rapid growth which continues until after maturity. Moulting then occurs less frequently and eventually ceases in aged animals. The increment in size during each moulting cycle varies. It is greater in immature than is adult animals so although the increase in number of growth rings is linear the increase in size at this time is near exponential. The maximum size attained varies from generation to generation even in the same pool. There are sexual differences in the proportions of the carapace and damage due to injury increases markedly in aged animals. At 7.5�C third- and fourth-stage nauplii did not mature and scarcely grew during incubation for 336 hr. At 16, 20, and 25�C similar larvae grew to maturity in about 349, 161, and 109 hr respectively. The mean number of spines on telsons of animals from one pool is different from that of those from other pools. This situation merits further examination since the biological characteristics of the species facilitate the study of this quantitative, probably genetically determined, character in reproductively isolated populations.

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.

A multi-year and multi-site population study on the life history of Salamandrina perspicillata (Savi, 1821) (Amphibia, Urodela)

2008 ◽  
Vol 29 (2) ◽  
pp. 161-170 ◽  
Author(s):  
Carlo Utzeri ◽  
Claudio Angelini ◽  
Damiano Antonelli
Keyword(s):  
Life History ◽  
Body Size ◽  
Population Study ◽  
Climatic Conditions ◽  
Life History Variation ◽  
Differential Growth ◽  
History Of ◽  
Natural Pond ◽  
The Mean ◽  
Site Population

Abstract We studied nine populations of Salamandrina perspicillata for two to nine years and described the life history variation among these population. Despite experiencing similar climatic conditions, populations differed in mean body size: populations using still water bodies for oviposition were larger body-sized than those using brooks. One semi-natural pond was used by particularly small individuals and was probably recently colonised. The mean body size of ovipositing females varied from year to year. Measurements of individuals in successive years showed that the tail grew more than the trunk and this differential growth increased with age. Females did not oviposit every year and, within a given population, the number of ovipositing females varied widely from year to year.

The life history of Diastylis sculpta Sars, 1871 (Crustacea: Cumacea) in Passamaquoddy Bay, New Brunswick

1976 ◽  
Vol 54 (5) ◽  
pp. 615-619 ◽  
Author(s):  
Susan Corey
Keyword(s):  
Life History ◽  
New Brunswick ◽  
Life Span ◽  
Shallow Water ◽  
Maximum Life Span ◽  
Summer Generation ◽  
Passamaquoddy Bay ◽  
History Of ◽  
The Mean ◽  
Gravid Females

Diastylis sculpta was collected from shallow water (1–15 m) in Passamaquoddy Bay over a 26-month period. D. sculpta produces a rapidly growing and developing summer generation between two successive winter generations. The overwintering generation releases young in mid-July and late August. The summer generation releases young in November. The mean fecundity of the summer-gravid females (78.4) is much greater than the mean fecundity (20.0) of the fall-gravid females. The maximum life-span is 5 months and 12 months for members of the summer and winter generations respectively.

The life history of Pteronarcys dorsata (Say) (Plecoptera: Pteronarcyidae) in southwestern Virginia

1983 ◽  
Vol 61 (9) ◽  
pp. 1981-1985 ◽  
Author(s):  
Richard A. Lechleitner ◽  
Boris C. Kondratieff
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Fourth Order ◽  
Maximum Size ◽  
Warm Water ◽  
Leaf Packs ◽  
History Of ◽  
Podostemum Ceratophyllum

The life history of the giant stonefly Pteronarcys dorsata was investigated in a warm water fourth order river in southwestern Virginia. The life cycle of P. dorsata was univoltine with emergence occurring mid-March to 1st week of April. Adults lived up to 42 days in the laboratory. Mean fecundity was 242 eggs with up to four separate egg batches produced. Eggs hatched in 23 to 38 days. Early nymphal instars were collected in the river in mid-June. Nymphs reached maximum size by late November or December. During the warm months nymphs were found in mats of Podostemum ceratophyllum (river weed) and through the winter months under large unembedded rocks or leaf packs. The diet consisted of diatoms and detritus. Higher water temperatures of longer duration in the Little River probably allowed this species to complete its life cycle in 1 year rather than the 2 to 4 years previously reported.

Offshore–onshore linkages in the larval life history of sole in the Gulf of Lions (NW-Mediterranean)

2014 ◽  
Vol 149 ◽  
pp. 194-202 ◽  
Author(s):  
Fabien Morat ◽  
Yves Letourneur ◽  
Dominique Blamart ◽  
Christophe Pécheyran ◽  
Audrey M. Darnaude ◽  
...  
Keyword(s):  
Life History ◽  
Larval Life ◽  
Gulf Of Lions ◽  
Nw Mediterranean ◽  
History Of ◽  
Larval Life History

Avian hosts, prevalence and larval life history of the ectoparasitic fly Passeromyia longicornis (Diptera : Muscidae) in south-eastern Tasmania

2016 ◽  
Vol 64 (2) ◽  
pp. 100 ◽  
Author(s):  
Amanda B. Edworthy
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Ambient Temperature ◽  
Pupal Stage ◽  
Larval Life ◽  
Forest Bird ◽  
South Eastern ◽  
Major Player ◽  
History Of ◽  
Larval Life History

Blood-sucking fly larvae are widespread parasites of nestling birds, but in many systems we lack knowledge of their basic biology. This study reports the first observation of an endemic Tasmanian fly species, Passeromyia longicornis (Diptera : Muscidae), parasitising the forty-spotted pardalote (Pardalotus quadragintus), another Tasmanian endemic. Because the forty-spotted pardalote is an endangered and declining songbird, P. longicornis is a species of interest to conservation biologists. Its larval form is an obligate, subcutaneous parasite of nestling birds, but before this study, there were just two published records of the species infesting avian hosts, and little known about its ecology or life cycle. This study documented hosts, prevalence, and larval life history of P. longicornis by locating and monitoring nests and ectoparasites of the forest bird community in south-eastern Tasmania. I also reared P. longicornis larvae in captivity to determine the length of the pupal stage in relationship to ambient temperature. Hosts of P. longicornis included forty-spotted pardalotes (87% prevalence across nests), striated pardalotes (Pardalotus striatus) (88% prevalence), and New Holland honeyeaters (Phylidonyris novaehollandiae) (11% prevalence). Both pardalote species were new host records. P. longicornis larvae burrowed under the skin of nestlings where they developed for 4–7 days, feeding on nestling blood. When fully grown, larvae dropped into the surrounding nest material and formed pupae. Length of the pupal stage was 14–21 days, and declined with increasing ambient temperature. Median parasite abundance was 15 larvae in infested forty-spotted pardalote nests and 11 larvae in infested striated pardalote nests. Nestling mortality was frequently associated with ectoparasite presence. This study provides the first survey of P. longicornis hosts, prevalence and life cycle, and shows that this species is likely a major player in the ecology of pardalotes, and possibly other forest bird species in Tasmania.

scholarly journals Population structure and life history of Neomysis nigra Nakazawa, 1910 (Mysida) on Jeju Island, South Korea

Crustaceana ◽  
2016 ◽  
Vol 89 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Jae-Yong Bae ◽  
Gyeong Eon Noh ◽  
Won-Gyu Park
Keyword(s):  
Population Structure ◽  
Life History ◽  
South Korea ◽  
Carapace Length ◽  
Developmental Stages ◽  
Jeju Island ◽  
Female Size ◽  
Life Stages ◽  
History Of ◽  
The Mean

Population structure and life history of the mysid Neomysis nigra Nakazawa, 1910 were studied on Jeju Island, South Korea. N. nigra was collected monthly from a shallow embayment of Jeju Island from May 2013 to May 2014. Temperature and salinity were measured during the sampling. The carapace length (CL) of N. nigra was measured. Life stages were divided into six categories and embryos in the marsupium were classified by developmental stages. During the study period, water temperatures ranged from −0.3 to 35.7°C. The CL of females was larger than that of males. The mean CL of adults was negatively correlated with water temperature. CL values in winter and spring were higher than those in summer and autumn. Brooding females and juveniles were found all year round. The abundance of juveniles was relatively higher in May, July, December, and February than in other months. The number of embryos in the marsupium increased with increasing female size. In conclusion, the present study suggests that the populations of N. nigra have four major spawning groups in a year and reproduce all year round.

Oviposition periodicity, egg morphology and life history of large cabbage moth Crocidolomia pavonana population in Samoa

2016 ◽  
Vol 34 (2) ◽  
pp. 29
Author(s):  
John B. Sulifoa ◽  
Sateki Fangupo ◽  
Rashmi Kant
Keyword(s):  
Life History ◽  
Egg Parasitoid ◽  
Egg Mass ◽  
Trichogramma Chilonis ◽  
History Of ◽  
Egg Morphology ◽  
Series Of Experiments ◽  
The Mean ◽  
Average Size ◽  
Cabbage Moth

A study on the biology and behaviour of the Samoan population of Crocidolomia pavonana was carried out through a series of experiments. The study showed that C. pavonana completes its life cycle in 24-35 days. Female emerge, mate and oviposit (as egg mass) during the scotophase. The average size of egg mass was 9.0 ± 0.48 mm2 and the mean number of eggs oviposited were significantly (PC. pavonana oviposits small egg masses. This information could be used to develop effective pest management using the recently identified egg parasitoid Trichogramma chilonis.

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