shanker selvaraju | Annamalai University (original) (raw)

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Papers by shanker selvaraju

Animal Reproduction Science, Feb 9, 2013

"The present study describes captive breeding, reproductive behavior and larval/juvenile rearing ... more "The present study describes captive breeding, reproductive behavior and larval/juvenile rearing of Apogon quadrifasciatus. Spawning occurred 25 days after stocking in the breeding
tank. Clutch size varied from 2500 to 3100. The males incubated the eggs, the incubation period was approximately five days at a mean temperature of 29 ◦C. The average total length of the newly hatched larvae was 2.6 mm with an average mouth gape of 160 m.
Two experiments were conducted to determine the most suitable food items for the larvae. In the first (planktonic phase, day 1–13) larvae fed with copepod nauplli showed the highest survival (33%). In the second experiment (settlement phase, 14–26 days, copepod, Artemia sp. and Cyclop-Eeze), also showed that copepods were the preferred feed by the post hatching larvae. After 26 days, post hatching larvae were fed a diet that followed
a protocol designed in accordance to the mouth size. Culture was maintained up to six months, and juveniles attained a maximum total length of 46.3 mm and a weight of about 3500 mg. Captive breeding and rearing of A. quadrifasciatus can help in restoring the wild populations impacted by local trawling activities as well as to supply this species to the ornamental fish trade, in a sustainable way."

Archives of Applied Science Research, 2013

European Journal …, Jan 1, 2011

Seven fish samples of different species (Mugil cephaluss, Siganus javus, Etroplus suratensis, Pen... more Seven fish samples of different species (Mugil cephaluss, Siganus javus, Etroplus suratensis, Penaeus monodon, Perna viridis, Meretrix casta and Scylla tranguebarica) collected from Vellar estuary, East coat of India were assessed for proximate composition and accumulation of metals. The protein level is varied from 11.81 to 20.34%, likewise Lipid (1.15 to 2.65%), Carbohydrates (2.43 to 6.16%) and Moisture (73.60 to 81.13%). Metals like Co, Cr, Fe, Cu, Mg, Mn, Ni, Cd and Zn were also determined and find in normal level.

Animal Biology

The knowledge of the nutrient requirements and practical diet formulations for Penaeus monodon is... more The knowledge of the nutrient requirements and practical diet formulations for Penaeus monodon is fully known. In the production cost, the cost of diet alone comes around 50 to70%. This is mainly because of the addition of lecithin which is a relatively expensive dietary ingredient. It is important to determine the usefulness of lecithin in the growth of P. monodon. In order to keep the diet cost as low as possible this experiment was designed with and without lecithin. The objective of the present study was to assess the growth of shrimp with varying lecithin doses. To study the water quality parameters and to study the growth and survival of animals feed containing different percentage of lecithin. Trials conducted indicated the soybean lecithin did not have any effect on shrimp’s growth. The
shrimp weight varied from 3.15 to 8g in Control, 2.58 to 6g in Treatment A, 2.87 to 6.62g in Treatment B, 3.1 to 6.75g in Treatment C. These confirm that under a controlled clear water culture system, partial or complete replacement of soybean lecithin in a commercial diet for P. monodon resulted in no
detriment in growth. Purge lecithin in the diet may allow for less-expensive diet formulations for P. monodon and may reduce the diet cost for producers, who are supplying feed. As diet cost represents the largest variable cost in a commercial aquaculture operation, increased knowledge of specific dietary requirements is essential for formulating a cost-effective commercial P. monodon diet.

Animal Reproduction Science, Feb 9, 2013

"The present study describes captive breeding, reproductive behavior and larval/juvenile rearing ... more "The present study describes captive breeding, reproductive behavior and larval/juvenile rearing of Apogon quadrifasciatus. Spawning occurred 25 days after stocking in the breeding
tank. Clutch size varied from 2500 to 3100. The males incubated the eggs, the incubation period was approximately five days at a mean temperature of 29 ◦C. The average total length of the newly hatched larvae was 2.6 mm with an average mouth gape of 160 m.
Two experiments were conducted to determine the most suitable food items for the larvae. In the first (planktonic phase, day 1–13) larvae fed with copepod nauplli showed the highest survival (33%). In the second experiment (settlement phase, 14–26 days, copepod, Artemia sp. and Cyclop-Eeze), also showed that copepods were the preferred feed by the post hatching larvae. After 26 days, post hatching larvae were fed a diet that followed
a protocol designed in accordance to the mouth size. Culture was maintained up to six months, and juveniles attained a maximum total length of 46.3 mm and a weight of about 3500 mg. Captive breeding and rearing of A. quadrifasciatus can help in restoring the wild populations impacted by local trawling activities as well as to supply this species to the ornamental fish trade, in a sustainable way."

Archives of Applied Science Research, 2013

European Journal …, Jan 1, 2011

Seven fish samples of different species (Mugil cephaluss, Siganus javus, Etroplus suratensis, Pen... more Seven fish samples of different species (Mugil cephaluss, Siganus javus, Etroplus suratensis, Penaeus monodon, Perna viridis, Meretrix casta and Scylla tranguebarica) collected from Vellar estuary, East coat of India were assessed for proximate composition and accumulation of metals. The protein level is varied from 11.81 to 20.34%, likewise Lipid (1.15 to 2.65%), Carbohydrates (2.43 to 6.16%) and Moisture (73.60 to 81.13%). Metals like Co, Cr, Fe, Cu, Mg, Mn, Ni, Cd and Zn were also determined and find in normal level.

Animal Biology

The knowledge of the nutrient requirements and practical diet formulations for Penaeus monodon is... more The knowledge of the nutrient requirements and practical diet formulations for Penaeus monodon is fully known. In the production cost, the cost of diet alone comes around 50 to70%. This is mainly because of the addition of lecithin which is a relatively expensive dietary ingredient. It is important to determine the usefulness of lecithin in the growth of P. monodon. In order to keep the diet cost as low as possible this experiment was designed with and without lecithin. The objective of the present study was to assess the growth of shrimp with varying lecithin doses. To study the water quality parameters and to study the growth and survival of animals feed containing different percentage of lecithin. Trials conducted indicated the soybean lecithin did not have any effect on shrimp’s growth. The
shrimp weight varied from 3.15 to 8g in Control, 2.58 to 6g in Treatment A, 2.87 to 6.62g in Treatment B, 3.1 to 6.75g in Treatment C. These confirm that under a controlled clear water culture system, partial or complete replacement of soybean lecithin in a commercial diet for P. monodon resulted in no
detriment in growth. Purge lecithin in the diet may allow for less-expensive diet formulations for P. monodon and may reduce the diet cost for producers, who are supplying feed. As diet cost represents the largest variable cost in a commercial aquaculture operation, increased knowledge of specific dietary requirements is essential for formulating a cost-effective commercial P. monodon diet.