A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Balasubramanian, R.
- Reproductive Maturation of Seahorse, Hippocampus kelloggi, (Jordan and Snyder, 1902) in Cuddalore Coast, Southeast Coast of India
Authors
1 Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai-608 502, Tamil Nadu, IN
Source
Indian Journal of Education and Information Management, Vol 6, No 2 (2017), Pagination: 1-6Abstract
Background/Objectives:Seahorse species are being used in aquarium keeping and it is particularly used as ingredients in traditional medicine, particularly in Southeast Asia as Traditional Chinese Medicine. The decline of these species is great concern in the light of global exploitation of seahorses. The maturation definition must be established to know the species distribution and effective conservation measures can be applied to target organisms.
Methods/Statistical Analysis: The collection was made from Cuddalore coast on monthly basis over the period of one year (October 2000 to September 2001). The samples after collection were preserved in 5% formalin and later dissected along latero-ventral side near the abdominal region and the gonads were removed carefully. Ovaries were preserved in modified Gilson’s fluid and ova diameter measurements were made from ovaries of various maturity stages.
Findings: Specimens with different maturity stages of gonads (testes and ovaries) were recorded during different months in Hippocampus kelloggi. The percentage of occurrence of maturity stages of gonads during different months is illustrated. The ova diameter distribution of six different maturity stages in Hippocampus kelloggi is presented. Stage I - V was composed egg diameter of 1.06 – 1.35 mm, 1.36 – 1.65 mm, 1.66 – 1.85 mm, 1.86 - 2.05 mm and 2.06 - 2.45 mm respectively. In stage VI (spent recovering) only a few ova were observed.
Application/Improvements: The reproductive maturation evidences for the most robust approach to determine quantity of seahorses.
Keywords
Seahorse, Male, Female, Maturity Stages, Ova, Percentage Frequency.Full Text
References
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- Effect of Lead Nitrate on Histopathological Changes in Tissues of Freshwater Fish Labeo rohita (Ham.)
Authors
1 Deportment of Zoology, Annamalai University, Annamalai Nagar, Tamil Nadu -608 002, IN
2 Center Advanced study in Marine Biology, Annamalai University Parangipettai, Tamil Nadu- 608 502, IN
Source
Indian Journal of Education and Information Management, Vol 6, No 2 (2017), Pagination: 1-8Abstract
Objective: To investigate lead nitrate toxicity with emphasis on the histopathological effects of fish Labeorohita.
Methods: The fishes were exposed to 31, 31.5, 32, 32.5 and 33ppm of lead nitrate (LN) solution at 24, 48, 72 and 96 hours of intervals. The lethal conc. (LC50) value of lead nitrate was 33ppm for 96 h of exposure. Fishes were exposed to control and sub lethal conc. of lead nitrate (3.3ppm) over a period of 96 h.
Findings: Histopathology of fish organs, after 96 Hof LN exposure revealed the cell proliferation, lamellar fusion, lamellar cell hyperplasia, and epithelial lifting. The vacuolation of hepatocytes and necrosis were observed in liver. The changes of the tissue cells were predominantly showed in 96hr.
Application/Improvements: LN is highly toxic to Labeorohita therefore its high conc. of LN in areas close to aquatic bodies should not be encouraged. Fishes from such water bodies is not suitable for human consumption because of the possibility of toxic material present in the fish. Fishes as well as water due to such pollution are toxic to human beings.
Keywords
Lead Nitrate, Histopathology, Labeorohita, Hyperplasia, Water Bodies, Heavy Metal.Full Text
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- Food and Feeding Habits of Seahorse, Hippocampus kelloggi (Jordan and Snyder, 1902) in Cuddalore Coastal Water, Southeast Coast of India
Authors
1 Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai-608 502, Tamil Nadu, IN
Source
Indian Journal of Education and Information Management, Vol 6, No 3 (2017), Pagination: 1-8Abstract
Background/Objectives: Seahorses might render them vulnerable to overfishing or other disruptions such as habitat damage. Different species of Hippocampus are harvested on a large-scale, and traded by at least 50 na-tions in high volumes and various product forms. The unsustainable exploitation has focused attention on the large gaps in our knowledge of wild seahorse biology and ecology. Hippocampus kelloggi is one the most widely held species in public aquaria and also used for traditional medicines.
Methods/Statistical analysis: Seahorse H. kelloggi samples were collected from Cuddalore coast during Oct. 2000 – Sept. 2001 for gut content analysis. The point’s method and percentage occurrence method have been adopted. The gut contents were estimated based on the frequency of occurrence of different food materials following the point’s method. The guts were considered ‘full’ when the gut was packed with food with thick wall and intact, ‘3/4 full’ when it was partly full ‘½ full’, ‘¼ full’, ‘trace’ and ‘empty’ according to the relative condition of the gut as indicated above.
Findings: The diet of H. kelloggi mainly considered of Acetes sp., copepods, mysids, tanaids, megalopa larvae, amphipods, shrimp larvae, polycheates , nematodes etc. Acetes sp. was dominant food item for adult and it was contributed 48.6 to 64.1% during different months. The other food items of amphipods (5.0 to 9.5%), tanaeids (2.4 to 9.1%), copepods (.33 to 0.7%), lucifer (2.8 to 10.0%), mysids (2.3 to 2.5%), shrimps (larvae and juveniles) (3.7 to 9.0%), polychaetes (5.3 to 12.5%), nematodes (1.2 to 6.3%) and the fish larvae (3.0 to 3.3%) were recorded. Copepods were the major food items in juveniles which contributed 15.4 to 29.8% for the whole year. The other food items were amphipods (11.3 to 18.5%), mysids (8.5 to 16.9%), tanaeids (6.4 to 17.4%), megalopa larvae (4.4 to 9.4%), Acetes sp. (4.3 to 16.6%), lucifer (2.2 to 8.5%), shrimps (larvae and juveniles) (2.5 to 4.3%), polychaetes (2.5 to 12.2%), and nematodes (4.4 to 16.0%). Active feeding was showed after spawning season in adult.
Application/Improvements: Through this work may hope to increase our understanding of seahorse feeding ecology, and to stimulate the development of sampling approaches that can help to balance the need to use specimens in research and the conservation needs.
Keywords
Hippocampus kelloggi, Adult, Juvenile, and Food Items, Percentage Occurrence, Dominant Food.Full Text
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- Determination of OC, N, P, K Level with Effect Endosulfan in Vermicompost
Authors
1 Deportment of Zoology, Annamalai University, Annamalai Nagar, Tamil Nadu - 608 002, IN
2 Center Advanced study in Marine Biology, Annamalai University Parangipettai-608 502, Tamil Nadu, IN
Source
Indian Journal of Education and Information Management, Vol 6, No 3 (2017), Pagination: 1-6Abstract
Objective/Backgrounds: The analysis of selected macronutrients such as NPK and OC content in the natural compost (WU) and vermicompost (WW) produced from sublethal concentrations of endosulfan mixed cow dung by the action of Indian earthworm Lampitomauritii (Kinberg).
Methods/Statistical analysis: Biomass, OC, N, P and N level was observed in endosulfan mixed vermicompost and natural compost at the end of 90th day.
Findings: The biomass of L. mauritii, OC, N, P and K was decreased in endosulfan treated experiments than control.
Application/Improvements: To reduce the application of pesticides in the agricultural field due to affecting the non target farmer’s friend organism like earthworms.
Keywords
Earthworm, Lampitomauritii, Pesticide, Endosulfan, Growth, Nutrients.Full Text
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- Culture Practices of Litopenaeus vannamei in Fresh Water Grow-Out Ponds
Authors
1 Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai-608 502, Tamil Nadu, IN
2 Deportment of Zoology, Annamalai University, Annamalai Nagar -608 002, Tamil Nadu, IN
Source
Indian Journal of Education and Information Management, Vol 6, No 3 (2017), Pagination: 1-9Abstract
Background/Objectives: Shrimp farming has been made an impressive growth in many developing countries especially in Asian countries. This activity is paved way to prominent economic growth and social importance.
Methods/Statistical analysis: The present study was undertaken for shrimp culture during August 2015 – November 2015 from fresh water aquaculture farm. Water samples were collected from culture ponds during the study period to analyze various physico-chemical parameters. The L.vannameiseeds (post larval stage 14) that had been acclimatized to the oppt salinity and it were confirmed disease free, transport with maintained optimum condition and reached to the ponds. The seeds were properly stocked in the culture ponds.
Findings: The water temperature values varied from 24°C and 28°C.Ranges of salinity 0.5 - 2.5 ppt were recorded. DO (dissolved oxygen) values varied from 4 and 7.1ml/l. The maximum pH values of 8.0 was recorded during the month of November 2015 and minimum of 7.3 was observed during August 2015. The maximum of feed provision 3.635tn was recorded in P3 (pond 3) and minimum of 3.145 was recorded at P1 (pond 1). The maximum ABW 25.3g was recorded in P3 and minimum of 24.5 was recorded at P1. The maximum biomass 2.340tn was recorded in P3 and minimum of 2.058tn was recorded at P2.
Application/Improvements: Shrimp culture has been increasing recent years in Indian Subcontinent. Liberalization of economy, high profitability and good international market are the factors, this has been given new impetus for shrimp culture boom in India. Hence, the present has been carried out the culture activity of L. vannamei in fresh water environment. This will be motivated and enhanced the culture practices.
Keywords
L. vannamei, Pond Preparation, Physic-Chemical Parameter, Seed Stocking, Mineral Supplementation, Feed Management, Growth Monitoring and Harvesting.Full Text
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- Influence of Seasonal Changes on Physico-Chemical Characteristics of Uppanar Estuary, Southeast Coast of India
Authors
1 Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai- 608502, Tamil Nadu, IN
2 Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai- 608502, Tamil Nadu
3 Deportment of Zoology, Annamalai University, Annamalai Nagar 608 002 Tamil Nadu, IN
Source
Indian Journal of Education and Information Management, Vol 6, No 3 (2017), Pagination: 1-8Abstract
Background/Objectives: To study the seasonal changes influencing the various abiotic factors in estuaries and shallow coastal waters.
Methods/Statistical analysis: Water sample was collected from Uppanar estuary for a period of one year to analyze various physico-chemical parameters during the study period.
Findings: the present work was carried out on physic-chemical characteristics of water in Uppanar estuary, southeast coast of India during the study period. The findings of physical parameters are: water temperature values ranged from 24.0 to 32.0°C, salinity values of 15 ppt - 36.5ppt, pH values ranged from 8.3 – 7.4, turbidity range 1 to 2000 NTU, TSS (total suspended solid) from 1108mg/l - 1040 mg/l, and DO (dissolved oxygen) range 3.7 to 5.2 ml/l. Chemical parameters of water: NO2 ranged from 0.239 to 3.745 μM/l, NO3 values varied from 3.86 to 12.54 μM/l, TN (total nitrogen), ranged from 9.32 to 28.19 μM/l, IP (inorganic phosphate) values varied from 0.110 to 0.89 μM/l, TP concentration ranged from 1.19 to 32.62 μM/l.
Application/Improvements: The physical and chemical properties of water immensely influence the uses of a water body for the distribution and richness of biota and also influence both vertical and horizontal migration of aquatic organisms.
Keywords
Physico-Chemical, Chemical Parameters.Full Text
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