Fecundity, egg diameter and food habits were part of aspects of the fish reproduction that is very important to know. This information can be used to predict recruitment and fish stock enchancement of C. lucius within the of domestication and aquaculture. The research was held in January until November 2012 in Singkarak Lake West Sumatera Province, in foodplain, Pematang Lindung sub district Mendahara Ulu Regency East Tanjung Jabung, Jambi Province, and in foodplain Mentulik Regency Kampar Kiri Hilir Riau Province. The amount of samples that was observed was 30 gonado of female fish Gonado Maturity Level III and IV in each research location. The total of C. lucius fecundity from West Sumatera is 1.996±568 eggs in which each egg has 1,35±0,09 mm in diameter, from Jambi is 2.196±866 eggs, each eggs has 1,53±0,11 mm, and Riau is 2.539±716 eggs, each has 1,70±0,14 mm in diameter. The main food of C. lucius is fish (70,78-89,01%) and the supplement food are shrimp (5,81-16,13%), frogs (1,77-4,25%) and another additional is water insects (3,98-9,80%). Based on thosekinds of food, then C. lucius is considered as the member of pure carnivore fish which has predatore behavior.

Garra minimus is described from the Ranga River of upper Bramaputra River Drainage, Garra kimini is described from the tributary of Ranga river, Garra nigricauda is described from Pasighat and Garra alticaputus is described from Dikrong river at Boorum village from the Indian State of Arunachal Pradesh. Garra minimus is unique in its size in comparisons with all other species of Garra reported/published from North East India and also with more number of branched pectoral-fin rays. Garra alticaputus is diagnosed in having a deeper head and lacking any coloration on fins and body relative to other species from these drainages and the region that have distinctive colour patterns either on the body or in their the fins. Garra nigricauda is diagnosed from other species of Garra from this region with its distinctive robust body size and by the forked caudal-fin tipped black and the upper lobe of caudal-fin being pointed and shorter than the lower lobe. Garra kimini is diagnosed in moderately large headed, height less than its length; width almost equal to height with more pectoral-fin rays like the other three species described herein.

Research morphometric characters of H. nemurus conducted in 2012 in the waters of Koto Panjang Reservoir Kampar Regency, the waters of Kampar River Langgam Village Kampar Regency and Kampar River Kampung Baru Village Pelalawan Regency Riau Province. The purpose of research is to analyze the morphometric characters, the main differentiating factor, determination of inter grouping of H. nemurus populations. Results showed that the average length of H. nemurus population standard Koto Panjang Reservoir Kampar Regency 281.33 ± 27.08 mm significantly different with populations Kampar river waters Langgam Village Kampar Regency 318.03 ± 32.07 mm and the water Kampar River Kampung Baru Village Pelalawan Regency 320.80 ± 32.03 mm. The main differentiator of 30 morphometric characters are long dorsal truss² (G²) and long dorsal truss³ (G³) with a value of 0.940 respectively. H. nemurus populations are geographically separated from each habitat and genetic distance H. nemurus populations in waters Langgam village closer with a population of Kampung Baru village.

This study was carried out to investigate effect of Nutrasexylam^© enzyme on growth performance, whole body composition and hematological indices of Nile tilapia, Oreochromis niloticus fingerlings. A total of 120 Nile tilapia fingerlings with an average body weight of 15.29 ± 1.10 g were fed diets supplemented with at 0, 0.05, 0.10 and 0.15 g/kg diet of Nutrasexylam^© enzyme. Experimental diets were formulated as dry pellets to contain about 30.11% crude protein and gross energy about 4.43 kcal/ g. Results show that, Nutrasexylam^© enzyme supplementation had a significant effect (p ≤ 0.05) on all growth parameters of experimental fish groups. However, the whole body contents were no affected significantly (p ≤ 0.05) by supplementation. The same trend of insignificant effect (p ≤ 0.05) of enzyme was detected with hematological indices of experimental fish. So it can be concluded that, the supplementation of Nutrasexylam^© especially, at 0.10 g/kg diet, detected the preferable results for growth performance without harmful effects on hematological characteristics and liver function of experimental fish.

The population dynamics of Periophthalmus barbarus in the Imo River Estuary, southeast Nigeria, were obtained from a twelve month length composition data ranging 6.0- 14.00cm total length TL (mean = 9.2225cm±0.1425; n=2160) corresponding to 1.67- 26.79g Total weight TW (mean = 8.4717g±0.40196). The growth was exponential. The asymptotic length (L_∞) of the Powell-Wetheral plot (L_∞ = 13.36cm) was seeded into FiSAT II software to obtain best estimates of von Bertalanffy growth parameters as: L_∞ = 19.9cmTL, growth curvature (K) = 1.0 year^-1; age-and-length-at-age zero years, t₀ = - 0.75; L_o= 10.50 cmTL; longetivity, t_max = 3 years. The estimated growth performance index, φ' = 2.59. Other FiSAT II growth parameters were the amplitude of growth oscillation, C = 0.9 and the Winter Point, WP = 0.6, R_n = 0.368. The computed total mortality, Z = 9.57 year ^-1, natural mortality, M = 2.04 year^-1 and fishing mortality, F was 7.53 year^-1. Results indicate the fishery is highly exploited with current exploitation ratio, E_cur = 0.79 > E_max = 0.644 > E_opt = 0.5 which suggests stock over-exploitation; corroborated by Z/K ratio (2.396). The rate of exploitation, µ = 0.787 year^-1 = E_cur, 79% of the available stock being fished annually. The length-at-first capture L_c=7.76cm cmTL and L_c/L_∞ was 0.39, indicating the fish was yet to complete 61% of growth as at the time of capture at L_c; hence, L_opt = 11.85cmTL, which provides least impact and confers better condition factor on the stock should be adopted.