REVISED CURVES FOR WATER ABSORPTION BY THE EGGS OF THE HOUSE CRICKET, ACHETA DOMESTICUS (L.)

1964 ◽  
Vol 42 (2) ◽  
pp. 239-243 ◽  
Author(s):  
J. E. McFarlane ◽  
P. J. S. Furneaux
Keyword(s):  
Water Absorption ◽  
Acheta Domesticus ◽  
House Cricket ◽  
Initial Water

Two features of the changing hydration of the egg after the initial water absorption period are described, and possible causes of these features are discussed in relation to changes occurring during this period in the shell.

TYROSINASE AND THE STRUCTURE OF THE EGG SHELL OF ACHETA DOMESTICUS (L.)

1961 ◽  
Vol 39 (1) ◽  
pp. 1-9 ◽  
Author(s):  
J. E. McFarlane
Keyword(s):  
Water Absorption ◽  
Normal Development ◽  
Acheta Domesticus ◽  
House Cricket ◽  
Egg Shell

The endochorion of the egg of the house cricket, Acheta domesticus (L.), is composed, in part, of imbricated scales. These scales are revealed in the pattern of melanization of the chorion that results on immersing eggs in aqueous tyrosine before they have begun to absorb water. Such treatment prevents the normal breaking up of the endochorion, but does not prevent water absorption or normal development of the eggs. Failure of the endochorion to fragment in the usual way affects the structure of the underlying lipoid layer of the serosal cuticle.

PHYSIOLOGICAL CONSEQUENCES OF THE EXPERIMENTAL REMOVAL OF THE CHORION (MATERNAL CUTICLE) FROM NEW LAID EGGS OF THE HOUSE CRICKET, ACHETA DOMESTICUS (ORTHOPTERA: GRYLLIDAE)

1978 ◽  
Vol 110 (5) ◽  
pp. 551-555
Author(s):  
J. E. McFarlane
Keyword(s):  
Water Absorption ◽  
Room Temperature ◽  
Acheta Domesticus ◽  
Experimental Results ◽  
Salt Solutions ◽  
House Cricket ◽  
Potassium Biphthalate ◽  
Experimental Removal

AbstractWhen new laid eggs of the house cricket are treated with a potassium biphthalate buffer (0.05 M) at pH 4.01 for 1 h, followed by a Na2CO3 solution at pH 11.0 for 22 h at room temperature, the chorion lifts off the surface of the egg; by cutting off the end of the stretched chorion, the dechorionated egg may be pushed out of the shell. Dechorionated eggs behave in a different manner towards sucrose and salt solutions than do intact eggs. These and other experimental results are discussed in relation to the physiology of water absorption.

Electron investigations of rhabdovirus-like particles in mexican bean beetles and crickets

1978 ◽  
Vol 36 (2) ◽  
pp. 378-379
Author(s):  
J. R. Adams ◽  
G. J Tompkins ◽  
A. M. Heimpel ◽  
E. Dougherty
Keyword(s):  
Biological Control ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Developmental Stages ◽  
Management Program ◽  
Acheta Domesticus ◽  
Epilachna Varivestis ◽  
House Cricket ◽  
Similar Morphology ◽  
Bean Beetle

As part of a continual search for potential pathogens of insects for use in biological control or on an integrated pest management program, two bacilliform virus-like particles (VLP) of similar morphology have been found in the Mexican bean beetle Epilachna varivestis Mulsant and the house cricket, Acheta domesticus (L. ).Tissues of diseased larvae and adults of E. varivestis and all developmental stages of A. domesticus were fixed according to procedures previously described. While the bean beetles displayed no external symptoms, the diseased crickets displayed a twitching and shaking of the metathoracic legs and a lowered rate of activity.Examinations of larvae and adult Mexican bean beetles collected in the field in 1976 and 1977 in Maryland and field collected specimens brought into the lab in the fall and reared through several generations revealed that specimens from each collection contained vesicles in the cytoplasm of the midgut filled with hundreds of these VLP's which were enveloped and measured approximately 16-25 nm x 55-110 nm, the shorter VLP's generally having the greater width (Fig. 1).

THE EFFECTS OF WHEAT GERM OIL AND LINOLEIC ACID ON GROWTH AND REPRODUCTION OF THE HOUSE CRICKET

1962 ◽  
Vol 40 (3) ◽  
pp. 371-374 ◽  
Author(s):  
Claude Ritchot ◽  
J. E. McFarlane
Keyword(s):  
Linoleic Acid ◽  
Growth And Development ◽  
Wheat Germ ◽  
Acheta Domesticus ◽  
Wheat Germ Oil ◽  
House Cricket ◽  
Growth And Reproduction

Lipid other than sterol improves the growth and development of nymphs of Acheta domesticus (L.), as shown by the effect of adding wheat germ oil and linoleic acid to the diet. Such lipid is also necessary for reproduction: the effect appears to be on the male, but may also be on the female.

Performance of the house cricket (Acheta domesticus) on by-product diets in small-scale production

2021 ◽  
pp. 1-6
Author(s):  
J.M. Sorjonen ◽  
M. Karhapää ◽  
S. Holm ◽  
A. Valtonen ◽  
H. Roininen
Keyword(s):  
Conversion Rate ◽  
Development Time ◽  
Acheta Domesticus ◽  
Small Scale ◽  
Scale Production ◽  
Feed Conversion ◽  
House Cricket ◽  
Current Production ◽  
Feed Conversion Rate ◽  
By Products

As insect farming is becoming more popular in Europe and in the US, the use of food industry by-products in insects’ feed is drawing more attention. However, it is still unclear how to maximise the use of by-products in the feeds while meeting the nutritional requirements and maintaining profitable rearing yields with the current production technology. In this study, we conducted an experiment in Finnish small-scale cricket farming and laboratory conditions to determine whether five diet treatments, including by-product diets with barley mash and turnip rape, modify the overall fresh yield (kg), development time and feed conversion rate of the house crickets (Acheta domesticus). We discovered that the diets differed in the overall fresh cricket yield (kg) but not in the development time or the feed conversion rate of the crickets. The diets with a high proportion of by-product decreased the price of the feed but at the same time reduced the yield. Based on our results, complex by-product diets with the by-product proportion of 20-41% are the most suitable for house cricket rearing.

scholarly journals Possibility of Using House Cricket (Acheta domesticus) or Mulberry Silkworm (Bombyx mori) Pupae Meal to Replace Poultry Meal in Canine Diets Based on Health and Nutrient Digestibility

Animals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2680
Author(s):  
Sathita Areerat ◽  
Pipatpong Chundang ◽  
Chalermpol Lekcharoensuk ◽  
Attawit Kovitvadhi
Keyword(s):  
Bombyx Mori ◽  
Body Condition Score ◽  
Energy Requirement ◽  
Control Diet ◽  
Clinical Signs ◽  
Nutrient Digestibility ◽  
Acheta Domesticus ◽  
House Cricket ◽  
Mulberry Silkworm ◽  
Silkworm Bombyx Mori

There has been increasing interest in using insects as sustainable protein sources for humans and animals. Therefore, this study aimed to explore the possibility of substituting poultry meal with house cricket (Acheta domesticus: AD) or mulberry silkworm (Bombyx mori: BM) pupae. Fifty healthy adult mixed-breed dogs were selected and divided into five experimental groups, which were fed, in amounts based on daily energy requirement, with a control diet, a diet with 10% AD, with 20% AD, with 7% BM, or with 14% BM. Days 0–22 and 23–28 of the experiment served as the adaptation and collection phases, respectively. Haematology and blood chemistry were collected at days 0, 14, and 28, and body weight, body condition score, feed intake, faecal output, faecal score, faecal moisture, and apparent total tract digestibility of dry matter and nutrients were measured during the collection phase. The results from this study suggested that AD and BM can replace poultry meal without any adverse consequences on all measured parameters (p > 0.05). Therefore, AD at 20% or BM at 14% can be used in canine diet formulations. However, long-term feeding trials should be conducted and should focus on clinical signs relating to hypersensitivity disorders.

scholarly journals EXPERIENCE OF APPLICATION HIGH PERFORMANCE CEMENT COMPOSITES FOR CREATING DURABLE SCULPTURAL ELEMENTS

2017 ◽  
Vol 3 ◽  
pp. 286
Author(s):  
Genadijs Sahmenko ◽  
Sandis Aispurs ◽  
Aleksandrs Korjakins
Keyword(s):  
Water Absorption ◽  
High Performance ◽  
Cement Composite ◽  
Cement Composites ◽  
Freezing And Thawing ◽  
Initial Water ◽  
Good Potential ◽  
Freezing And Thawing Cycles ◽  
Material Ductility ◽  
And Control

Traditionally, sculptural and decorative elements of building facades are created from mortar mixes based on lime, gypsum or Portland cement. Generally these materials have porous and permeable structure, which determines their accelerated degradation, especially in the aggressive environment of modern cities. High performance cement composites (HPCC) have been considered for production and restoration of sculptural elements in historical buildings. For this purpose, fine-graded, multi-component and highly workable mixes were elaborated. Mix compositions were modified with micro-fillers, plasticizing and stabilizing admixtures, as well as fibers to improve material ductility and control shrinkage cracking. Basic mechanical properties and durability (such as water absorption, frost resistance) were determined and two types of HPCC were compared (>50 MPa: HPCC and >120 MPa: UHPCC). It has been confirmed that cement composite mixes are characterized by self-consolidating effect, high compressive strength, extremely high resistance versus freezing and thawing cycles and low water absorption. Surface quality was evaluated and initial water absorption (tube tests) were performed for laboratory samples and real sculptural elements after 5 years of exploitation. The results confirmed good potential for using HPCC for creating more attractive and durable architectural shapes and façade elements compared to elements made using traditional cement and lime mortar.

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