Fat reserves and reproduction in the green turtle, Chelonia mydas

1994 ◽  
Vol 21 (3) ◽  
pp. 257 ◽  
Author(s):  
D Kwan
Keyword(s):  
Water Content ◽  
Egg Production ◽  
Chelonia Mydas ◽  
Fat Content ◽  
Egg Laying ◽  
Energetic Cost ◽  
Fat Reserves ◽  
Previous Season ◽  
Significant Difference ◽  
Fat Stores

Measurements were made of the fat and water content of standard cores of fat lining the inner carapace of green turtles caught and butchered by indigenous fishermen in Daru, Papua New Guinea. The amount of depot fat, total lipid and neutral lipid per core varied with the sex, maturity and reproductive status of the turtle. The fat content of cores from prepubescent turtles did not vary with sex. In contrast, cores from adult female turtles had a significantly greater fat content than those from males. Cores from pubescent and vitellogenic females had the highest fat content. Neutral (storage) lipid was significantly higher in cores from vitellogenic females than in those from breeding, which suggests that sub-carapace depot fat is used to fuel the energetically expensive costs of migration and egg production. Cores from breeding females had a significantly higher fat content than those from males, which suggests that the energetic costs of vitellogensis and egg-laying are reflected in sub-carapace fat stores. The greater energetic cost to this fat store for breeding by females is also reflected in the significantly higher water content of the fat of females that had bred in the previous season compared with those in vitellogenesis. In contrast, there was no significant difference between the water content of cores from non-breeding and breeding males.

The influence of nutrition on egg-production and longevity in unmated female body-lice (Pediculus humanus corporis: Anoplura)

Parasitology ◽  
1941 ◽  
Vol 33 (1) ◽  
pp. 40-46 ◽  
Author(s):  
A. J. Haddow
Keyword(s):  
Female Body ◽  
Egg Production ◽  
Egg Laying ◽  
The Body ◽  
Unmated Female ◽  
Pediculus Humanus ◽  
The Third ◽  
Significant Difference ◽  
The Mean ◽  
Body Lice

1. Isolated unmated female body-lice were worn in pillboxes between the skin and the clothes. They were kept constantly on the body but, by a simple device, groups of ten were permitted feeding periods of different length. These groups were fed for 4, 8, 12, 16, 20 and 24 hr. per day respectively. Another group of ten were never allowed to feed after the last moult.2. Some of the figures for egg yield were high. Lice in the 24 hr. group were able to maintain a rate of ten eggs per day for 4−5 days at a time.3. No significant difference in longevity or rate of egg-laying was found to exist between the 12, 16, 20 and 24 hr. groups nor between the 4 and 8 hr. groups but a pronounced and significant difference exists between the 8 and 12 hr. groups. Below 12 hr. there is a sharp fall in longevity and rate of egg production. The unfed group all died, without laying, on the third day.4. The rate of laying as shown by the mode increases progressively with increase in time allowed daily for feeding.5. With regard to the mean eggs per louse the position is less clear. It is felt that the 24 hr. group may differ significantly from the 12, 16 and 20 hr. groups but this is uncertain.

Seasonal Field Analyses of Fat Content, Live Weight, Dry Weight and Water Content of the Aphidophagous Scymnodes Lividigaster (Mulsant) and Mycophagous Leptothea Galbula (Mulsant) (Coleoptera: Coccinellidae).

1981 ◽  
Vol 29 (5) ◽  
pp. 679 ◽  
Author(s):  
JME Anderson
Keyword(s):  
Quantitative Analysis ◽  
Survival Rate ◽  
Water Content ◽  
Seasonal Changes ◽  
Prey Species ◽  
Live Weight ◽  
Dry Weight ◽  
Subjective Assessment ◽  
Fat Content ◽  
Fat Reserves

Over 36 and 24 months, respectively, both the aphidophagous Scymnodes lividigaster (Muls.) and the mycophagous Leptothea galbula (Muls.) accumulated fat before periods of dormancy, but contained little fat after dormancy and during breeding. Over the whole period, there were no significant differences between sexes or between years in either species, except that dormant females contained significantly more fat than males, and that during breeding males of S. lividigaster contained significantly more fat than females. Subjective assessment of fat reserves gave the same results as did quantitative analysis. Live and dry weights of females were higher during breeding and dormancy than after dormancy; live weights of females were higher than those of males. Water content was lower during dormancy than during breeding. In L. galbula, seasonal changes were similar in a dry and a well watered habitat; any differences appeared related to a higher survival rate in females compared with males, especially in the poorer habitat. In S. lividigaster, seasonal changes in fat content were negatively related to changes in abundance of an essential prey species.

scholarly journals Manganese in the nutrition and metabolism of the pullet

1968 ◽  
Vol 22 (4) ◽  
pp. 635-643 ◽  
Author(s):  
J. W. Mathers ◽  
R. Hill
Keyword(s):  
Egg Production ◽  
Manganese Content ◽  
Live Weight ◽  
Egg Laying ◽  
Whole Body ◽  
General Terms ◽  
Significant Difference ◽  
Mn Content ◽  
The Mean ◽  
Total Body

1. Groups of pullets were given a diet of high (106–107 μg/g) or low (6–7 μg/g) manganese content and killed either before sexual maturity, at the point-of-lay or after a 6- to 7-month laying period. The birds were dissected into six tissue fractions: skeleton, liver, kidney, ovary and oviduct, skin and feathers, and muscle with remaining tissue. Total Mn and concentration of Mn as μg/g dry fat-free tissue were determined for each fraction.2. There were no differences in live weight attributable to level of dietary Mn, and no differences in egg production.3. Mean total body Mn varied among groups over a fairly narrow range (528–738 μg), with the exception of birds given the high-Mn diet throughout the experiment, in which the mean was 2319 μg. This represented an increase in Mn content during egg laying of 244%. There was no significant difference in the Mn content of birds given the low-Mn diet whether they were killed at the point-of-lay or after the laying period.4. The effects of treatment on the weight of Mn in each of the tissue fractions are described. The very large increase in total Mn that occurred during egg production in birds given the high-Mn diet was accounted for largely by the increase in skin and feathers (1072 μg Mn).5. In general terms, the Mn content of liver, kidney and ovary and oviduct together constituted only just over 10% of total body Mn, the remainder being distributed about equally among skeleton, skin and feathers, and muscle with remaining tissue.6. There was a close parallel between the concentration of Mn of a tissue and the total weight of Mn it contained except in certain instances when stage of maturity or egg production influenced weight of the tissue.7. The effects of treatments on the Mn contents of these birds are discussed in relation to the retention of dietary Mn, and the withdrawal from and accumulation of Mn in individual tissues and the whole body.

Comparative Serum Biochemical Profile for Different Breeds of Ducks versus White Leghorn Chickens in Peak Laying Period

2017 ◽  
Author(s):  
Rajashree Rath ◽  
B. Panigrahi ◽  
S. K. Mishra ◽  
C. R. Pradhan ◽  
A. Maity ◽  
...  
Keyword(s):  
Lipid Profile ◽  
Egg Production ◽  
Egg Laying ◽  
Biochemical Profile ◽  
White Leghorn ◽  
Normal Ranges ◽  
Significant Difference ◽  
Serum Biochemical ◽  
Serum Biochemical Profile ◽  
Almost All

An investigation was carried out to compare the serum biochemical profile of two prominent avian species: ducks vis a vis chickens, at peak egg production phases. The genotypes consisted of 3 breeds of ducks: Khaki Campbell, White Pekins and a native duck breed: Kuzhi (reared in Odisha and adjoining regions) and besides the White Leghorn chickens, at 50 week age, numbering 30 each, with rearing done in individual cages. The result revealed significant (p>0.0001) genotype-associated differences for almost all the serum biochemical parameters, except globulin. There existed a significant (p>0.0001) difference between the species (duck verses chicken) for these parameters, with distinct inter-breed variations. Among the lipid profile HDL of ducks remained comparable to that of chickens, with the indigenous Kuzhi ducks displaying the most desirable lipid-profile of all the genotypes except LDL. The serum liver-enzymes (SGOT and SGPT) were well within normal ranges, expected or laying birds with significant difference between species, with between-breed variations among ducks. It was concluded that, ducks had significantly-distinct and variant serum biochemical profiles compared to chickens, where the indigenous ducks (of Odisha region) possessed the most- desirable estimates, as expected from table- egg laying species.

Changes in lipid and protein reserves and in diet of breeding House Sparrows

1988 ◽  
Vol 66 (4) ◽  
pp. 950-956 ◽  
Author(s):  
David G. Krementz ◽  
C. Davison Ankney
Keyword(s):  
Clutch Size ◽  
Egg Production ◽  
Passer Domesticus ◽  
Threshold Level ◽  
Egg Laying ◽  
High Protein ◽  
House Sparrows ◽  
Fat Reserves ◽  
Egg Formation ◽  
Nutrient Reserves

We collected House Sparrows (Passer domesticus) around London, Ontario, weighed their protein and fat reserves, and determined their food habits and egg production to test the effects of reserve levels on the timing of egg formation and the control of clutch size. Although consumption of high-protein foods was apparently related to insect availability, females consumed more high-protein foods than did males, especially during the laying period. Before egg production began, protein and fat reserves of males declined but those of females were constant. After egg production began, reserves of males remained constant through postreproduction. Neither protein nor fat reserves were accumulated by females before egg formation began, suggesting that an elevated threshold level of nutrient reserves was not necessary to commence egg formation. Protein reserves of females did not decline during egg production; fat reserves increased just before the first ovulation and declined rapidly thereafter. Neither fat reserve levels on the first day of ovulation nor the decline in fat reserves thereafter were related to clutch size. Postlaying females had, on average, enough fat reserves to produce an additional egg. We conclude that although female House Sparrow use fat reserves during egg laying, their clutch size is not controlled thereby.

scholarly journals Enhancement of the reproductive potential of Mallada boninensis Okamoto (Neuroptera: Chrysopidae), a predator of red spider mite infesting tea: An evaluation of artificial diets

2012 ◽  
Vol 64 (1) ◽  
pp. 281-285 ◽  
Author(s):  
Duraikkannu Vasanthakumar ◽  
Amsalingam Roobakkumar ◽  
Jasin Rahman ◽  
Pandian Kumar ◽  
Chandran Sundaravadivelan ◽  
...  
Keyword(s):  
Egg Production ◽  
Reproductive Potential ◽  
Egg Yolk ◽  
Egg Laying ◽  
Standard Diet ◽  
Artificial Diets ◽  
High Fecundity ◽  
Effective Manner ◽  
Red Spider Mite ◽  
Significant Difference

Green lacewing Mallada boninensis is an important predator of various soft-bodied arthropods, including red spider mites in tea. Efforts were made to develop mass rearing technology for this predator in a cost effective manner. Three combinations of artificial diets (Protinex (AD1), egg yolk (AD2) and royal jelly (AD3) based) were evaluated in comparison with standard diet (Protinex + Honey). All the tested diets influenced the egg-laying capacity of M. boninensis. The egg yolk-based diet resulted in more egg production than the other two diets. Survival of all life stages of M. boninensis was also observed on each diet and no significant difference was noticed. Results revealed that the egg yolk-based diet is the best of the three diet combinations tested in view of high fecundity and survival rate of M. boninensis.

An ω-3 fatty acid enriched chia diet: Influence on egg fatty acid composition, cholesterol and oil content

1999 ◽  
Vol 79 (1) ◽  
pp. 53-58 ◽  
Author(s):  
R. Ayerza(h) ◽  
W. Coates
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Egg Production ◽  
Control Diet ◽  
Fatty Acid Content ◽  
Cholesterol Content ◽  
Fat Content ◽  
Significant Difference ◽  
Linolenic Fatty Acid

Twenty-four Issa Brown laying hens were fed for 4 wk for the purpose of comparing a control diet with a diet containing 30% whole chia (Salvia hispanica L.) seeds. Egg weight and production, cholesterol content, total fat content, and fatty acid composition of the yolks were determined weekly. Sensory evaluation was conducted on eggs from the final week of the trial. Egg production was significantly (P < 0.05) greater for the control, although individual egg weights were not significantly different. No statistically significant difference (P < 0.05) in yolk fat content was found between treatments. Saturated palmitic fatty acid content of yolks was significantly (P < 0.05) less with the chia diet, with a 35% difference found at the end of the trial. Polyunsaturated, ω-3 α-linolenic fatty acid was significantly greater (P < 0.05) in yolks from the chia diet, and increased from 0 to 14.7% by the end of the trial. Chia improved the saturated:polyunsaturated fatty acid ratio in the yolks, compared to the control diet. No significant differences (P < 0.05) in taste preferences or off-flavors were found between eggs from both treatments. Key words: Egg yolk, chia, ω-3 α-linolenic fatty acid, cholesterol, flavor

scholarly journals Quality of Local Rams Meat Given Fermented Cassava Peel-Based Feed Using Local Microorganisms

2020 ◽  
Vol 8 (1) ◽  
pp. 26-32
Author(s):  
Dirja
Keyword(s):  
Protein Content ◽  
Water Content ◽  
Fat Content ◽  
Lamb Meat ◽  
Randomized Design ◽  
Significant Difference ◽  
North Sumatra ◽  
Cassava Peel ◽  
Male Sheep

This research aims to examine the provision of fermented cassava peel using local microorganisms on the quality of local male lamb meat. This research was conducted at Mr. Praditya Rahardja farm, Jalan Bunga Rinte, Kecamatan Medan Tuntungan, Kota Medan, the Food Technology Laboratory of the Faculty of Agriculture and the Laboratory of Biochemistry/Chemistry Faculty of Mathematics and Natural Sciences, University of North Sumatra, using 12 local male sheep from December 2019 to march 2020. This research designed using a completely randomized design (CRD) with 4 treatments and 5 replications. The treatment is various levels of fermented cassava peel using local microorganisms consisted of P0: ration without the addition of fermented cassava peel using local microorganisms; P1: ration with the addition of 25% fermented cassava peel using local microorganisms; P2: ration with the addition of 50% fermented cassava peel using local microorganisms and P3: ration with the addition of 75% fermented cassava peel using local microorganism. This research parameters are meat water content, meat protein content, meat fat content and meat shrinkage.The results showed that the level of concentrate gave a very significant difference (P <0,01) of protein content and meat fat content, but did not provide a significant difference (P> 0,05) of water content and cooking meat shrinkage. The conclusion of this research is the provision of fermented cassava peel using local microorganisms has a very significant influence on the lamb meat quality of male local sheep

scholarly journals Effect of starting body fat content of Leghorn-type laying hens on the changes in their body fat content, egg production and egg composition during the first egg laying period

Poljoprivreda ◽  
2015 ◽  
Vol 21 (1 Supplement) ◽  
pp. 195-198
Author(s):  
Eszter Szentirmai ◽  
◽  
Gabor Milisits ◽  
Tamas Donko ◽  
Zoltan Budai ◽  
...  
Keyword(s):  
Body Fat ◽  
Egg Production ◽  
Laying Hens ◽  
Fat Content ◽  
Egg Laying ◽  
Body Fat Content ◽  
Egg Composition
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