AI SearchEffects of hardness and salinity on hatch and survival of nile tilapia (Oreochromis niloticus Linnaeus) eggs under hatcherry conditions. (Record no. 35156)
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| 000 -LEADER | |
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| fixed length control field | 05775nas a2200421 a 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260818095244.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 050818s2004 th uu|m rtt 0| a1eng d |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b11968126 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no.AQ-04-26 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Prasad, Bhagwat |
| 245 10 - TITLE STATEMENT | |
| Title | Effects of hardness and salinity on hatch and survival of nile tilapia (Oreochromis niloticus Linnaeus) eggs under hatcherry conditions. |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Pathum Thani, Thailand : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 2004 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 96 p. : |
| Other physical details | ill. |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis ; |
| Volume/sequential designation | no. AQ-04-26 |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc.) - Asian Institute of Technology, 2004 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis proposal for the partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Nile tilapia (Oreochromis niloticus) is the most dominant cultured species of the Tilapiine group. Despite the increasing importance of Nile tilapia in aquaculture and increasing demand of their quality seed from the hatcheries, hatch and survival of their eggs to swim-up fry highly variable (12% to 90%). Some studies on the effects of hardness and salinity of hatchery water on egg and larval survival have indicated the imp01iance of these two factors on the incubation success. But, the studies on the role of hardness and salinity of the hatchery water on the hatching and larval survival are lacking. The effects of hardness and salinity on the artificial incubation of Nile tilapia (Chitralada strain) eggs were examined through several experiments. Increasing hardness level to 500-4200 mg/L and 150-1200 mg/L CaC03 in two separate experiments resulted in higher percent survival (51.7% and 26.4%) from eggs to swim-up fry than those (30.3% and 6.1 %) obtained in their respective controls with hardness levels of 50 mg/L. No significant difference (P>0.05) among the percent survival was observed in the treatments with hardness levels of 500-4,200 mg/L and 150-1,200 mg/L respectively, in two experiments. In another experiment where the salinities were prepared by diluting seawater, 4%o resulted in significantly higher {P<0.05) egg to swim-up fry survival (25.7%) than those (0.0-19.1 %) obtained at the other treatments with 0, 2, 6, 8, 12, 16 and 32%0 salinities. In the other experiment where the effects of salinities (4, 8 and 12%0) prepared using commercial grade raw sea salt (CS), iodized table salt with 99.9% NaCl {TS) and seawater (SW) were compared, 4%o of seawater salinity had again the highest survival rate from eggs to swim-up fry (37.4%) when compared to the control (23.35%), 12%0 SW salinity (27.9%) and 4-12%0 TS salinities (0.0-0.4%). The CS salinities of 4 and 8%0 resulted in similar survival rates (33.0 and 35.1 %) as 4%o seawater. In a laboratory experiment, 4 and 8%0 salinities with both analytical grade NaCl (LS) and TS had no survival where as the same salinities prepared by using mixtures of commercial grade calcium chloride and TS (25:75 and 50:50 by weight) resulted nearly 100% survival of Nile tilapia yolksac larvae when exposed for 96 hours (up to swim-up stage). Significant interaction (P<0.01) of salinity and hardness on survival rates of eggs up to swim-up fry was also observed 3x3 factorial experiment (2, 5 and 9%o salinities and 50, 500 and 1000 mg/L hardness). In general, the survival rates decreased with increase in salinity and increased with increase in hardness. Salinity of 2%o or above from NaCl (Prung Thip iodized table salt, 99.9% NaCl) seemed to be associated with low survival of Nile tilapia eggs and fry, but the survival increased by increasing calcium hardness. The treatments with 2%o salinity and hardness of 500 and 1,000 mg/L, and 5%o salinity and hardness of 500 and 1,000 mg/L resulted in higher survival rates (30.5-36.4%) from eggs to swim-up fry than those resulted in rest of the treatments (0.9-22.4%). These series of experiments indicated that the egg hatch could be improved by 11.5-13.4% and larval survival by 10.6-12.3% by increasing salinity of the hatchery water to 4%o (seawater source). Similarly, increase in calcium hardness could increase hatch rate by 22.4% and larval survival by 20.1-21.4%. Moreover, maintenance of hardness at 500 mg/L and salinity of 2%o could significantly add to the larval survival by 28.5%. These findings need to be further verified at commercial scale and then could be extended to the private hatcheries if found promising. The combination of 2%o salinity and 500 mg/L of hardness may be compared with 4%o seawater salinity and 4 and 8%0 CS salinities to examine their comparative effectiveness in further studies. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Nile tilapia |
| General subdivision | Eggs |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Fishes |
| General subdivision | Effect of water quality on |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Bart, Amrit N., |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Yakupitiyage, Amararatne, |
| Relator term | Examination Committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Yang, Yi, |
| Relator term | Examination Committee |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Joint Japan, |
| Relator term | Scholarship donor |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | World Bank Graduate Scholarship Program, |
| Relator term | Scholarship donor |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | AIT Fellowship, |
| Relator term | Scholarship donor |
| 810 2# - SERIES ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Asian Institute of Technology. |
| Title of a work | Thesis ; |
| Volume/sequential designation | no. AQ-04-26 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B09915">http://203.159.5.9/ait-thesis/detail.php?q=B09915</a> |
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| a | 240329 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 0 |
| Cataloger's initials, CIN (RLIN) | 050805 |
| First date, FD (RLIN) | m |
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| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnarc |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 22-AIT Thesis (Replacement) |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 40-Archives |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120697643 |
| CREATED | CREATED : 2013-06-09 |
| RECORD Id | RECORD # : i12740494 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
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| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120358071 |
| CREATED | CREATED : 2016-08-06 |
| RECORD Id | RECORD # : i13025387 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
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| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Cost, normal purchase price | Total checkouts | Full call number | Barcode | Date last seen | Copy number | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 18/08/2026 | 50.00 | AIT Thesis no.AQ-04-26 | 30050120697643 | 18/08/2026 | 3 | 18/08/2026 | 22-AIT Thesis (Replacement) | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 18/08/2026 | AIT Thesis no.AQ-04-26 | 30050120358071 | 18/08/2026 | 1 | 18/08/2026 | 40-Archives |