http://103.7.193.12:8080/xmlui/handle/123456789/35 DEPARTMENT OF FISHERIES BIOLOGY & GENETICS (FBG) 2026-07-26T08:18:39Z http://103.7.193.12:8080/xmlui/handle/123456789/2170 GENETIC IDENTIFICATION AND INDUCED BREEDING OF THREATENED INDIGENOUS SPECIES, Channa striata (Bloch, 1793) FOR SEED PRODUCTION PERVIN, RUBAIYA Channa striata, commonly known as the striped snakehead, is a high-value freshwater species with significant aquaculture potential in Bangladesh and Southeast Asia. However, its natural populations in Bangladesh are declining due to habitat degradation, overexploitation, and inadequate aquaculture practices. Despite its commercial importance, large-scale seed production remains underdeveloped owing to critical gaps in species identification, reproductive management, induced breeding, and larval rearing protocols.This dissertation aims to bridge these gaps and establish a scientific basis for the sustainable aquaculture of C. striata in Bangladesh. Four sequential studies were conducted: (i) species identification and phylogenetic analysis using geometric morphometrics and COI gene-based DNA barcoding; (ii) assessment of growth and reproductive biology of wild populations from the Atrai River system; (iii) standardization of hormonal induction protocols using carp pituitary extract (CPE) and Buserelin; and (iv) evaluation of weaning strategies for hatchery-produced larvae using Artemia, fish paste, and formulated feeds. The results confirmed clear species delineation among native and exotic Channa spp., with phylogenetic divergence supported by both morphometric and molecular data. Wild C. striata exhibited seasonal reproduction, with peak spawning from April to July. Induced breeding trials demonstrated that both CPE (80 mg/kg) and Buserelin (0.80 µg/kg) effectively stimulated spawning. Larval weaning experiments revealed that initial live feeding with Artemia followed by gradual transition to formulated diets ensured high survival and growth, while water quality, particularly ammonia concentration, played a critical role. Overall, this research provides a comprehensive framework for the conservation and aquaculture of C. striata by integrating taxonomic validation, reproductive biology, induced breeding, and larval nutrition. The findings are expected to support the development of standardized hatchery protocols, contribute to wild stock conservation, and promote commercial-scale seed production in Bangladesh. Future research should emphasize selective breeding, advanced larval nutrition, and field-level application of the proposed protocols for long-term sustainability. GENETIC IDENTIFICATION AND INDUCED BREEDING OF THREATENED INDIGENOUS SPECIES, Channa striata (Bloch, 1793) FOR SEED PRODUCTION; A PhD DISSERTATION BY RUBAIYA PERVIN, Registration No: 2205057, Session: 2022, FISHERIES BIOLOGY AND GENETICS, DEPARTMENT OF FISHERIES BIOLOGY AND GENETICS, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR-5200; July, 2025. 2025-07-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/996 The General Banking Activities of Southeast Bank Limities, Dinajpur Branch Rahman, Md. Jobaidur Md. Jobaidur Rahman ID # E130502039 MBA (Evening) Major in Finance Faculty of Business Studies Hajee Mohammad Danesh Science & Technology University, Dinajpur 2016-04-28T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/972 SOME BIOLOGICAL ASPECTS OF THREE ENDANGERED FISH: Barilius bendelisis, B. barna AND B. tileo FROM THE ATRAI RIVER, DINAJPUR, BANGLADESH ARA, MOST. IFFAT- The present research was undertaken to estimate the length-weight relationship, condition factors and food habits of Barilius bendelisis, Barilius barna and Barilius tileo. Samples were collected monthly from Atrai river for six months from November 2015 to April 2016. Monthly relationships between total length (TL) and body weight (BW) as well as determination of growth pattern was performed for Barilius bendelisis, B. barna and B. tileo separately. Among 243 individuals B. bendelisis were 57, B. barna were 102 and B. tileo were 84. The total length and body weight of B. bendelisis ranged from 7 to 15.6 cm and from 3.55 to 34.1 g respectively. The total length and body weight of B. barna ranged from 4.9 to 7.9 cm and from 1.2 to 5.25 g respectively. The total length and body weight of B. telio ranged from 6.2 to 10.8 cm and from 2.61 to 11.94 g respectively. For B. bendelisis the generalized relationship of pooled data over the study period was BW = 0.020TL2.77. The study revealed high values of coefficient of determination in all months (r2 ≥ 0.869). At 95% confidence limits the „b‟ value revealed that the growth in January was isometric, and the growth in other months were allometric. B. bendelisis exhibited a higher condition factors (K) value (1.245±0.084) in February, 2016 and a lower K value (1.182±0.053) in April, 2016. For B. barna the generalized relationship of pooled data over the study period was BW = 0.017TL2.76. The study revealed high values of coefficient of determination in all months (r2 ≥ 0.820). At 95% confidence limits the „b‟ value revealed that the growth in January and April were isometric, and the growth in other months were allometric. B. barna exhibited a higher K value (1.201±0.110) in February, 2016 and a lower K value (1.110±0.226) in January, 2016. For B. tileo the generalized relationship of pooled data over the study period was BW= 0.026TL2.62. The study revealed high values of coefficient of determination in all months (r2 ≥ 0.833). At 95% confidence limits the „b‟ value revealed that the growth in January was isometric, and the growth in other months were allometric. B. tileo exhibited a higher K value (1.258±0.249) in February, 2016 and a lower K value (1.089±0.164) in April, 2016. The higher and lower mean RLG ± standard deviation (S.D.) of B. bendelisis in April and December were 2.01 ± 0.21 and 1.57 ± 0.17, respectively. The higher and lower mean RLG ± standard deviation (S.D.) of B. barna in November and January were 1.93±0.123 and 1.01±0.012, respectively. The higher and lower mean RLG±standard deviation (S.D.) of B. tileo in April and November were 1.78±0.21 and 1.25±0.180, respectively. Finally it was concluded that they are omnivore feeder. The present findings of length-weight relationship, condition factors and food habits of Barilius spp. in Atrai river might be used in future analyses of other population parameters and stock assessment of these valuable small indigenous species in Bangladesh. A THESIS BY MOST. IFFAT-ARA Examination Roll No.: 1505048 Registration No.: 1505048 Session: 2015-2016 Semester: January-June, 2016 Submitted to the Department of Fisheries Biology and Genetics In partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN FISHERIES BIOLOGY AND GENETICS 2016-06-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/971 FOOD HABIT AND REPRODUCTIVE BIOLOGY OF THREATENED FISH SPECIES, Cirrhinus reba (Hamilton, 1822) AKTAR, MOST. RASHADA Cirrhinus reba known as Khorkia bata or Bhagna belongs to the family cyprinidae. A study was conducted on the food habit of C. reba collected from Atrai river of Dinajpur district for a period of 6 months from September, 2015 to February, 2016. Different items of food were determined by the frequency of occurrence method. It was found that debris (22.41%) was the most dominant food item in the gut of C. reba followed by mud (18.56%) and sand (14.97%). The other food items were phytoplankton (30.85%) and zooplankton (4.31%). It was omnivorus fish with relative length of gut was (5.36 ± 1.22). Another experiment was conducted on the fecundity and GSI from March to August, 2015. Gonadosomatic index was calculated and the fecundity was determined by gravimetric method. The highest gonadosomatic index (37.38 ± 2.31) was found in the month of July. The lowest fecundity 406.67 was recorded in the fish having 16.3 cm length and 39.83 g body weight. The highest fecundity (167325) was recorded in the fish having 19.6 cm length and 93.3 g body weight. The fecundity was found to increase with the increase total length following the equation, F = 0.046 TL + 2.339 (r = 0.645) and the fecundity was also found to increase with the increase of body weight following the equation, F = 0.262 BW + 1.231 (r = 0.934). It was also found that the fecundity was increasing with equation, F = 0.700 OW - 4.817 (r = 0.853). The relationship between fecundity and total length, body weight, and ovary weight were found to be linear and significant. The investigation revealed some aspects of feeding and reproductive biology of the threatened fish C. reba. Further details investigation including histology is high required for the feeding and reproductive biology of C. reba. A THESIS BY MOST. RASHADA AKTAR Examination Roll No.: 1505049 Registration No.: 1505049 Session: 2015-2016 Semester: January-June, 2016 Submitted to the Department of Fisheries Biology and Genetics In partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN FISHERIES BIOLOGY AND GENETICS 2016-06-01T00:00:00Z