Changes in analyzed organic matter and energetic content of two thin-skinned holothuroids Leptosynapta galliennei and Eumolpadia violacea, at critical stages of their life cycle

Echinodermata ◽  
2020 ◽  
pp. 421-429
Author(s):  
Jean-Pierre Féral
Keyword(s):  
Organic Matter ◽  
Life Cycle

First Report of the Earthworm Pontoscolex corethrurus (Müller, 1857) from Punjab, India

2018 ◽  
Vol 68 ◽  
pp. 1-8 ◽  
Author(s):  
Sharanpreet Singh ◽  
Jaswinder Singh ◽  
Ayushi Sharma ◽  
Adarsh Pal Vig ◽  
Shakoor Ahmed
Keyword(s):  
Organic Matter ◽  
Life Cycle ◽  
High Efficiency ◽  
Economic Importance ◽  
Edaphic Factors ◽  
Pontoscolex Corethrurus ◽  
Wide Range ◽  
First Time ◽  
Poor Soil ◽  
German Naturalist

The earthwormPontoscolex corethrurus(Müller, 1857) is reported for the first time from Punjab, India. This species was first described by German naturalist Fritz Müller in 1857 from Santa Catarina state of Brazil. It is commonly found in gardens, cropland and fallowlands. It tolerates wide range of climatic and edaphic factors due to its endogeic ecological category.P. corethrurushas high efficiency for organic matter assimilation and has ability to live in new habitat due to which it can survive even in very poor soil. The life cycle of this species is well documented and this species has economic importance due to its use in waste management.

The life history of Branchinecta mackini Dexter (Crustacea: Anostraca) in an argillotrophic lake of Alberta

1977 ◽  
Vol 55 (1) ◽  
pp. 161-168 ◽  
Author(s):  
Graham R. Daborn
Keyword(s):  
Organic Matter ◽  
Life History ◽  
Life Cycle ◽  
Growth Rates ◽  
Dry Weight ◽  
Fairy Shrimp ◽  
Maximum Biomass ◽  
History Of ◽  
Mean Size

The life history of B. mackini was studied in a large argillotrophic lake during 1970–1972. Hatching began immediately after spring thaw and was terminated by rising salinity 10 days to 2 weeks later. Growth rates reached maxima of 1 mm/day at 4 weeks of age and then declined as mean size approached 22–23 mm at 7–8 weeks. Clutch sizes varied as a function of female length. Maximum biomass of 580 mg dry weight/m2 (2700 cal/m2) was reached in late May, of which 3.9% per day was consumed by B. gigas. Source of the energy is presumed to be a bacteria – organic matter complex associated with suspended particles. Life cycle details are compared with other fairy shrimp species and the role of B. mackini in the community is discussed.

Temporal patterns of change in the necrophagous hyperbenthic zooplankton community of Lobster Bay, Cape d'Aguilar Marine Reserve, Hong Kong

2004 ◽  
Vol 84 (3) ◽  
pp. 531-538 ◽  
Author(s):  
Christine N.W. Lee ◽  
Brian Morton
Keyword(s):  
Organic Matter ◽  
Hong Kong ◽  
Life Cycle ◽  
Community Composition ◽  
Marine Reserve ◽  
Zooplankton Community ◽  
Seasonal Patterns ◽  
Baited Traps ◽  
One Year ◽  
Life Cycle Patterns

Crab-baited traps, with a 5-mm diameter opening, were deployed 90 mm off the seabed monthly at Lobster Bay, Hong Kong, for one year between 1998 and 1999. Visitors drawn to the traps were mainly species of Ceradocus (Gammaridea: Melitidae), Tisbe (Harpacticoida: Tisbidae) and Nebalia (Leptostraca: Nebaliacea). Apart from Ceradocus sp., all were scavengers with catches using baited traps significantly exceeding unbaited controls. Ceradocus sp. was apparently drawn to traps for refuge. The trapped scavenger community composition changed with deployment duration in the presence of bait. Nebalia sp., Neanthes cricognatha (Polychaeta: Nereidae) and Lepedepecreum sp. (Gammaridea: Lysianassoidea) were identified mostly two/three-days post-deployment, exhibiting a potential preference for rotten organic matter. Seasonal catches were also identified for all three visitors with maxima between October 1998 and April 1999. Such seasonal patterns might be related to either turbulence destabilizing the substratum during this period or life cycle patterns in the study area.

scholarly journals Analysis of the Life Cycle of the Soil Saprophyte Bacillus cereus in Liquid Soil Extract and in Soil

2006 ◽  
Vol 72 (7) ◽  
pp. 4970-4977 ◽  
Author(s):  
Sébastien Vilain ◽  
Yun Luo ◽  
Michael B. Hildreth ◽  
Volker S. Brözel
Keyword(s):  
Organic Matter ◽  
Life Cycle ◽  
Bacillus Cereus ◽  
Agar Medium ◽  
Soil Extract ◽  
Associated Bacteria ◽  
Soil Microcosms ◽  
Agar Surface ◽  
Microscopic Inspection ◽  
Current Paradigm

ABSTRACT Bacillus is commonly isolated from soils, with organisms of Bacillus cereus sensu lato being prevalent. Knowledge of the ecology of B. cereus and other Bacillus species in soil is far from complete. While the older literature favors a model of growth on soil-associated organic matter, the current paradigm is that B. cereus sensu lato germinates and grows in association with animals or plants, resulting in either symbiotic or pathogenic interactions. An in terra approach to study soil-associated bacteria is described, using filter-sterilized soil-extracted soluble organic matter (SESOM) and artificial soil microcosms (ASM) saturated with SESOM. B. cereus ATCC 14579 displayed a life cycle, with the ability to germinate, grow, and subsequently sporulate in both the liquid SESOM extract and in ASM inserted into wells in agar medium. Cells grew in liquid SESOM without separating, forming multicellular structures that coalesced to form clumps and encasing the ensuing spores in an extracellular matrix. Bacillus was able to translocate from the point of inoculation through soil microcosms as shown by the emergence of outgrowths on the surrounding agar surface. Microscopic inspection revealed bundles of parallel chains inside the soil. The motility inhibitor l-ethionine failed to suppress outgrowth, ruling out translocation by a flagellar-mediated mechanism such as swimming or swarming. Bacillus subtilis subsp. subtilis Marburg and four Bacillus isolates taken at random from soils also displayed a life cycle in SESOM and ASM and were all able to translocate through ASM, even in presence of l-ethionine. These data indicate that B. cereus is a saprophytic bacterium that is able to grow in soil and furthermore that it is adapted to translocate by employing a multicellular mode of growth.

scholarly journals A Wireworm Glyphonix bimarginatus (Schaeffer) (Insecta: Coleoptera: Elateridae)

EDIS ◽  
2019 ◽  
Vol 2019 (2) ◽  
pp. 4
Author(s):  
Dakshina R. Seal ◽  
Rafia A. Khan
Keyword(s):  
United States ◽  
Organic Matter ◽  
Life Cycle ◽  
The United States ◽  
Economic Importance ◽  
Click Beetles ◽  
Larval Stages ◽  
Click Beetle ◽  
The World ◽  
Germinating Seeds

Glyphonix bimarginatus (Figure 1) is a common click beetle pest of various economically important crops. The larvae of click beetles (Coleoptera: Elateridae) are elongated, wire-like and commonly known as wireworms. Wireworms are considered as subterranean economic pests during their larval stages in many parts of the world including the United States. The larvae of Glyphonix bimarginatus are commonly found with larvae of other click beetles in the field. Larvae of Glyphonix bimarginatus occurs in soil rich in organic matter and rarely in sandy soil. Young roots and germinating seeds are commonly fed upon by the larvae. This document describes its distribution, life cycle and biology, hosts, economic importance, and management. Also available on the Featured Creatures website at http://entomology.ifas.ufl.edu/creatures. https://edis.ifas.ufl.edu/in1233

Study of the bioecology of Chrysomya (Robineau-Desvoidy, 1830) (Diptera: Calliphoridae): Collections

2021 ◽  
Vol 1 (2) ◽  
pp. 042-055
Author(s):  
Carlos Henrique Marchiori
Keyword(s):  
Organic Matter ◽  
Life Cycle ◽  
Geographic Distribution ◽  
Forensic Entomology ◽  
Cycle Length ◽  
Literature Search ◽  
Animal Origin ◽  
Chrysomya Megacephala ◽  
The Family ◽  
Taxonomic Groups

The Chrysomya primary importance to the field of medico legal Forensic Entomology is due to the genus' predictable life cycle length, allowing researchers to accurately estimate a postmortem interval. The aim of this study was to carry out a bibliographical summary on the blowflies of the genus Chrysomya (Insecta: Calliphoridae) with emphasis on the species: Chrysomya albiceps (Wiedemann, 1819) (Diptera: Calliphoridae), Chrysomya megacephala, (Fabricius, 1794) (Diptera: Calliphoridae) and Chrysomya putoria (Wiedemann, 1830). The mini review consists of bibliographical research on the muscoid dipterans (Muscomorpha) (Order: Diptera). The research was carried out in studies related to quantitative aspects of the Family and Species (taxonomic groups) and in conceptual aspects such as origin, geographic distribution, biology, life cycle, as a secondary vector of enterobacteria, for causing secondary myiasis and importance in Forensic Emtomology. A literature search was carried out containing articles published from 1971 to 2021. The mini review was prepared in Goiânia, Goiás, from August to September 2021, through the Online Scientific Library (Scielo) and internet. This is a family of blowflies of great ecological and medical-sanitary importance, as they are decomposers of organic matter, with their larvae usually developing in decayed material of animal origin, decomposing it and quickly consuming the carcasses, thus removing possible sources of diseases and recycling nutrients.

Redescription and neotype designation of Lobogynium sudhiri (Datta) (Acari: Diplogyniidae), a mite associated with beetles of the genus Atholus (Thomson) (Coleoptera: Histeridae) in the Palaearctic region

Zootaxa ◽  
2012 ◽  
Vol 3352 (1) ◽  
pp. 1 ◽  
Author(s):  
MASSIMO PLUMARI ◽  
SHAHROOZ KAZEMI
Keyword(s):  
Organic Matter ◽  
Life Cycle ◽  
Close Association ◽  
Palaearctic Region ◽  
New Combination ◽  
Anal Area

Ophiocelaeno sudhiri Datta, 1985 (family Diplogyniidae) is transferred to the genus Lobogynium Trägårdh, 1950 and rede-scribed from specimens collected in close association with histerid beetles of the genus Atholus (Thomson) in Europe and Asia.The genus Lobogynium is redefined and a key to the species is presented. The first description of the female, detailed redescrip-tion of the male and the new combination Lobogynium sudhiri (Datta, 1985) comb. nov. are given. A neotype is designated forthis species, because the holotype is lost. A strongly sclerotised antero-lateral circum-anal area appears to be an autapomorphicfeature of this species. Lobogynium sudhiri is widely distributed in the Palaearctic region, and is probably a sapro-coprophilous species that completes its life-cycle in dung and other decaying organic matter.

scholarly journals Nymphal biology of Brachyptera risi (Morton, 1896) (Plecoptera: Taeniopterygidae) in a North Apennine stream (Italy)

2008 ◽  
Vol 19 (4) ◽  
pp. 228-231 ◽  
Author(s):  
Stefano Fenoglio ◽  
Tiziano Bo ◽  
Jesus López-Rodríguez ◽  
José Tierno de Figueroa
Keyword(s):  
Organic Matter ◽  
Life History ◽  
Life Cycle ◽  
Principal Component ◽  
Gut Contents ◽  
Trophic Plasticity ◽  
Egg Diapause ◽  
Fine Particulate ◽  
History Of ◽  
European Populations

Some aspects of the life history of a population of Brachyptera risi were investigated in a North Apennine stream and compared with previously studied European populations. In our study area, this species showed a univoltine fast seasonal life cycle. Nymphs were present from January to the beginning of May, probably spending the rest of the year mainly in egg diapause. Fine particulate organic matter was the principal component of the diet, while diatoms and other algae were also found in the guts. This finding suggests the existence of greater trophic plasticity of the species. Individuals of this population act as gatherer-collectors but not as scrapers as usually pointed out for other European populations. We also detected considerable amounts of animal matter in the gut contents. The density of B. risi nymphs in the study area was very variable during the study period, ranging from 0 to 2,348 ind/m2.

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