The effect of feeding levels on the fecundity of plaice (Pleuronectes platessa)

1989 ◽  
Vol 69 (1) ◽  
pp. 81-92 ◽  
Author(s):  
J. W. Horwood ◽  
M. Greer Walker ◽  
P. Witthames
Keyword(s):  
Body Weight ◽  
Gonad Development ◽  
Field Studies ◽  
Practical Significance ◽  
Food Level ◽  
In The Wild ◽  
Early Decision ◽  
Mature Fish ◽  
Different Levels ◽  
Effect Of Feeding

Previous field studies have recorded yearly variations in fecundity of 40–60% in similar sized plaice, and an experiment was conducted to investigate whether these changes could be generated, in the laboratory, by feeding plaice different levels of ration. One group of plaice was fed at a rate of about 2–2.3% of wet body weight per day, and a second group was fed initially 0.5% and later 1.8% per day. The experiment lasted for a period of 406 days.Of those fed on the lower ration, 39% produced no granular oocytes, whereas all fish on the higher ration produced granular oocytes. A comparison between the two groups, of those which did produce granular oocytes, found that the better-fed fish had 59% more granular oocytes, but the differences were less pronounced for the smaller, mature fish. Numbers of resting oocytes are also recorded.The results suggest that food level can significantly affect fecundity, and also revealed a new mechanism for regulation of fecundity in the plaice. The lack of granular oocytes was not due to atresia, but to an early decision not to proceed with gonad development; whether this is of practical significance for the population of plaice in the wild is not yet established.

THE EFFECT OF (Morinda citrifolia L.) MEAL IN DIET ON PERFORMANCE OF BROILER

2012 ◽  
Vol 2 (1) ◽  
pp. 21-27
Author(s):  
Yosi Fenita
Keyword(s):  
Body Weight ◽  
Body Weight Gain ◽  
Morinda Citrifolia ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Randomized Design ◽  
Different Levels ◽  
Effect Of Feeding ◽  
Average Body ◽  
Average Body Weight

The objective of the research was to evaluate to effect of feeding mengkudu on performances of broilers. The research design used was completely randomized design. One hundred broilers were distributed into five treatments. The treatments were different levels of mengkudu meal (0, 0.75%, 1.5%, 2.25 % and 3%). The observed measured were feed consumption, average body weight (gain) and feed conversion. Results showed that feeding mengkudu (Morinda Citrifolia L.)  no effect significant (P>0.05) on feed consumption, average body weight and feed conversion.  In conclusion, feeding mengkudu meal up to 3% (in diet) does not negatively affect feed consumption, average body weight, and feed conversion.

Effect of feeding different levels of lysine and protein on the performance of WLH layers

2017 ◽  
Author(s):  
Naga Raja Kumari K ◽  
Ravinder Reddy V ◽  
Chinni Preetham V ◽  
Srinivas Kumar ◽  
D.Sen A.R. ◽  
...  
Keyword(s):  
Body Weight ◽  
Feed Intake ◽  
Feed Efficiency ◽  
Egg Production ◽  
Egg Mass ◽  
Egg Weight ◽  
Protein Levels ◽  
Lysine Concentration ◽  
Different Levels ◽  
Effect Of Feeding

A trial was conducted to evaluate the requirement of digestible lysine at various protein levels in the diet of WLH layers (BV-300) from 25-44 weeks of age. Layers (528) were fed with diets containing two protein levels i.e. 13.36 and 15.78 % each with 5 % concentration variations of lysine (0.50, 0.55, 0.60, 0.65, and 0.70) and a control with 17 % CP and 0.70 % lysine. Each diet was fed to six replicates of eight birds. Egg production, feed intake, body weight were not influenced either by the concentration of lysine or by level of protein in diet. Increased (P d” 0.05) egg weight and egg mass were observed with increasing lysine in diets. Better feed efficiency was observed with increasing lysine concentration. It can be concluded that WLH layers require approximately 0.65% lysine with 13.36% CP or 0.63% lysine with 15.78% CP (i.e. 598.80 vs 570 mg/h/day) in diet.

Identification of the Filial Relationships of Free-Living Small Mammals by 35Sulfur

1983 ◽  
Vol 31 (4) ◽  
pp. 467 ◽  
Author(s):  
CR Dickman ◽  
DH King ◽  
D.C.D. Happold ◽  
M.J. Howell
Keyword(s):  
Body Weight ◽  
Adverse Effects ◽  
Small Mammals ◽  
Mus Musculus ◽  
Half Life ◽  
Field Studies ◽  
Free Living ◽  
Antechinus Stuartii ◽  
Rattus Fuscipes ◽  
Different Levels

A technique for determining the filial relationships of free-living small mammals is described. The radioisotope 35*sulfur is injected into a lactating mother, and this passes from the milk and is incorporated in the growing hairs of the young. In three species, Mus musculus and Rattus fuscipes (Rodentia) and Antechinus stuartii (Marsupialia), radioactivity in the hairs of the young was detected for up to 130 days after injection of the mother. The technique has the following advantages: (1) the half-life of 35*S is only 87.4 days; (2) 35*S had no evident adverse effects; (3) different treatments, ranging from 0.75 �Ci [27.75 kBq] g-� to 4.25 �Ci [157.25 kBq] g-� body weight of the mothers, resulted in different levels of radioactivity in the hair of the juveniles; consequently, the filial relationships of several mothers and their young may be established. The application of this technique to field studies of small mammals is outlined.

IMPLANTATION OF LHRH-a HORMONE TO STIMULATION OF GONAD DEVELOPMENT OF HUMPBACK GROUPER SECOND GENERATION ( F-2 )

2013 ◽  
Vol 5 (2) ◽  
Author(s):  
Tridjoko Tridjoko
Keyword(s):  
Body Weight ◽  
Second Generation ◽  
Gonad Development ◽  
Gonadal Development ◽  
Oocyte Diameter ◽  
2Nd Generation ◽  
Length Range ◽  
Concrete Tank ◽  
Implant Treatment ◽  
Stimulation Of

This study aimed to determine the effect of LHRH-a hormone implantation on gonadal development of humpback grouper, Cromileptes altivelis 2nd generation (F-2). Individuals used were 20 female grouper fish with weight range of 600-800 gram/fish and total length range of 28.0-30.0 cm. The treatment used 5 fish each with tagging. Grouper fishes were stocked into the 75 m3 circular concrete tank. Hormone of LHRH-a with dosage of 50 μg/kg body weight was used as implant treatment of (A) 1 time,, (B) 2 times, (C) 3 times, and (D) without implant. The results showed that implantation of LHRH-a hormone were significantly stimulate gonad development of humpback grouper second generation (F-2). Treatment of 3 times implant every month showed the best results produced  oocyte diameter up to 480 μm, while the control of oocyte diameter only reached <400 μm. Keywords: LHRH-a hormone, implantation, Humpback grouper, gonad development

Effect of Feeding Mixture of Soybean Peptides, L-Carnitine and Garcinia Cambogia Extract on Body Weight and Lipid Metabolism in Rats

2006 ◽  
Vol 11 (3) ◽  
pp. 210-217 ◽  
Author(s):  
Ju-Yeon Park ◽  
Hee-Sun Lee ◽  
Ju-Young Kim ◽  
Jin-Hee Lee ◽  
Kang-Pyo Lee ◽  
...  
Keyword(s):  
Body Weight ◽  
Lipid Metabolism ◽  
Garcinia Cambogia ◽  
Effect Of Feeding

The Effect of Feeding Date Palm Fruit (Phoeix dactylifera L.) on Energy, Macronutrient, and Fiber Intakes of a Convenient Sample of Females

2020 ◽  
Vol 16 (8) ◽  
pp. 1270-1277
Author(s):  
Hiba F. Al-Sayyed ◽  
Hamed R. Takruri ◽  
Nawal A. Bakir ◽  
Dima H. Takruri
Keyword(s):  
Body Weight ◽  
Body Fat ◽  
Date Palm ◽  
The Body ◽  
Control Group ◽  
Hormone Concentration ◽  
Palm Fruit ◽  
Menstrual Status ◽  
Feeding Duration ◽  
Effect Of Feeding

Background : Female menstrual changes in hormone concentration influence appetite and eating behavior. As well, eating pattern has some influences on menstrual hormonal status. Feeding date palm fruit has been found in our previous report to affect menstrual hormones and some menstrual parameters. Objective: The aim of this research is to study the effect of feeding dates on energy, macronutrient, and fiber intakes, body weight, and body fat%. Additionally, this study aims to find any correlation between menstrual hormone concentration and the above-mentioned parameters. Methods: A convenient sample (n=37) of not-sexually active females aged 20-30 were divided into two groups; one group (dates group) was fed 7 dates and the other served as a control group. The participants of the control group were exposed to the same experimental conditions except for eating dates. Throughout the feeding trial, the volunteers filled a 3-day food record; one menses day and two non-menses days. Results: There was a significant effect of the menstrual status-feeding duration interaction in terms of protein and fat intakes. Additionally, menstrual status, as well as feeding duration, affected energy and macronutrient intakes significantly. Furthermore, feeding duration affected fiber intake significantly. Despite the above-mentioned differences in energy and macronutrient intakes, these effects didn’t affect the body weight and body mass index of the study participants, neither their body fat%. Moreover, we have found significant correlations between nutrient intakes and menstrual hormone concentration. Conclusion : Feeding dates affected energy, macronutrient, and fiber intakes significantly. These effects were related to the changes in menstrual hormone concentration.

scholarly journals Methods in field chronobiology

2017 ◽  
Vol 372 (1734) ◽  
pp. 20160247 ◽  
Author(s):  
Davide M. Dominoni ◽  
Susanne Åkesson ◽  
Raymond Klaassen ◽  
Kamiel Spoelstra ◽  
Martin Bulla
Keyword(s):  
Technological Development ◽  
Monitoring Systems ◽  
Migratory Restlessness ◽  
Biological Organization ◽  
Rapid Improvement ◽  
Free Living ◽  
The Future ◽  
In The Wild ◽  
Temporal Aspect ◽  
Different Levels

Chronobiological research has seen a continuous development of novel approaches and techniques to measure rhythmicity at different levels of biological organization from locomotor activity (e.g. migratory restlessness) to physiology (e.g. temperature and hormone rhythms, and relatively recently also in genes, proteins and metabolites). However, the methodological advancements in this field have been mostly and sometimes exclusively used only in indoor laboratory settings. In parallel, there has been an unprecedented and rapid improvement in our ability to track animals and their behaviour in the wild. However, while the spatial analysis of tracking data is widespread, its temporal aspect is largely unexplored. Here, we review the tools that are available or have potential to record rhythms in the wild animals with emphasis on currently overlooked approaches and monitoring systems. We then demonstrate, in three question-driven case studies, how the integration of traditional and newer approaches can help answer novel chronobiological questions in free-living animals. Finally, we highlight unresolved issues in field chronobiology that may benefit from technological development in the future. As most of the studies in the field are descriptive, the future challenge lies in applying the diverse technologies to experimental set-ups in the wild. This article is part of the themed issue ‘Wild clocks: integrating chronobiology and ecology to understand timekeeping in free-living animals’.

scholarly journals Improved Trapping and Handling of an Arboreal, Montane Mammal: Red Panda Ailurus fulgens

Animals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 921
Author(s):  
Damber Bista ◽  
Sonam Tashi Lama ◽  
Janno Weerman ◽  
Ang Phuri Sherpa ◽  
Purushotam Pandey ◽  
...  
Keyword(s):  
Body Weight ◽  
Success Rate ◽  
Body Length ◽  
Tail Length ◽  
Morphometric Data ◽  
Field Identification ◽  
Red Panda ◽  
In The Wild ◽  
Chest Girth ◽  
Ailurus Fulgens

It is sometimes essential to have an animal in the hand to study some of their ecological and biological characteristics. However, capturing a solitary, cryptic, elusive arboreal species such as the red panda in the wild is challenging. We developed and successfully tested a protocol for tracking, trapping, immobilization, and handling of red pandas in the wild in eastern Nepal. We established a red panda sighting rate of 0.89 panda/day with a capture success rate of 0.6. We trapped and collared one animal in 3.7 days. On average, we took nearly 136 (range 50–317) min to capture an animal after spotting it. Further processing was completed in 38.5 (21–70) min. Before capture, we found it difficult to recognize the sex of the red panda and to differentiate sub-adults above six months from adults. However, body weight, body length, tail length, shoulder height, and chest girth can be used for diagnosis, as these attributes are smaller in sub-adults. Our method is a welfare-friendly way of trapping and handling wild red pandas. We report new morphometric data that could serve as a guide for field identification.

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