| Author | Maliwan Meewan |
| Call Number | AIT Thesis no.AE-91-60 |
| Subject(s) | Shrimps
|
| Note | A thesis submitted in a partial fulfillment of the requirements for
the Master of Science |
| Publisher | Asian Institute of Technology |
| Abstract | An experiment was conducted to estimate the heritability of
growth in relation to morphotypic transformation among full and
half sib families of the freshwater prawn, Macrobrachium
rosenbergii. Observations on prawn growth and morphotypic
transformation were made over a period of 31 weeks, during which
the juvenile prawns were kept in hapa enclosure and adults in
cages. Those hapas and cages were suspended in an earthen pond
where the water quality was maintained homogeneously under suitable
conditions. The heritability estimates were made on progeny from
32 full and half sib families nested within eight sires with two
dams per sire. The broad sense heritability was estimated for
carapace length, body length, claw length and total body weight.
The heritability estimates on the carapace length based on
paternal, maternal and fullsib analyses were found to be the
highest 0.40 (+0.22), 0 . 13 (+0.07) and 0 . 26 (+0.11) at 23 weeks,
respectively. The heritability on morphotypic transformation at 31
weeks from orange claw males (OC) to blue claw males (BC) were 0
(+0.04), 0 . 73 (+0.08) and 0.37 (+0.02) and the morphotypic
transformation from small males (SM) after removing bulls were 0.21
(+0.06), 0.56 (+0.05) and 0.39 (+0.03) for paternal, maternal and
fullsib analyse, respectively. The survival rate in cage culture
from initial stock to 23 weeks ranged from 55% to 96%. The number
of females presented in every cage was greater than male number and
blue claw males dominated among three male morphotypes at 23 weeks. |
| Year | 1991 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Lin, Chang Kwei; |
| Examination Committee(s) | Little, David C.;Sornthep Tumwasorn; |
| Scholarship Donor(s) | International Development Research Center (IDRC); |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1991 |