Browsing by Author "Golez, Nelson V."
Evaluation of processed meat solubles as replacement for fish meal in diet for juvenile grouper Epinephelus coioides (Hamilton) Feeding experiments were conducted to determine the efficacy of low fish-meal-based diets for juvenile grouper Epinephelus coioides (Hamilton). A diet containing 44% protein was formulated using fish meal as the major protein source. Processed meat solubles, a rendered by-product of slaughterhouses, was tested as a replacement for fish meal at increasing percentages from 0 to 100% in isonitrogenous diets. Eight dietary treatments representing fish-meal replacements were arranged in a completely randomized design with four replicates per treatment. Twenty-five fish were reared in circular fibreglass tanks of capacity 250 L, maintained in a flow-through seawater system and fed at 5–6% of total biomass, provided daily at 08:00 and 16:00 for 60 days. Results indicate that processed meat solubles can replace 40% of fish-meal protein with no adverse effects on weight gain, survival and or feed conversion ratio of E. coioides juveniles. Higher inclusion levels resulted in a significant decline in growth performance and inefficient feed conversion ratios, which may partly result from the lack of essential nutrients such as essential amino acids in meat solubles. This study has shown that the use of processed meat solubles substantially lowers the level of fish meal required in juvenile grouper diet and can be an efficient means of turning byproducts from slaughterhouses into a useful feed resource.
Book chapterIG Borlongan, RM Coloso & NV Golez - In OM Millamena, RM Coloso & FP Pascual (Eds.), Nutrition in Tropical Aquaculture: Essentials of fish nutrition, feeds, and feeding of tropical aquatic species, 2002 - Aquaculture Department, Southeast Asian Fisheries Development CenterThis chapter provides basic information on the feeding habits and behavior, and physiology of fishes and crustaceans. The mechanisms that control the movement and digestion of food, methods of assessing digestibility of feed, factors affecting digestion and absorption of food nutrients, and feeding processes in fish are discussed. An understanding of the feeding habits, feeding mechanisms, and the digestion and absorption processes can help fish farmers and nutritionists maximize the use of feed. The rate at which fish digest their food is of primary importance in determining feeding rates, frequency, and ration size. Knowledge of the digestive physiology of fish is also necessary for an effective feed formulation and in choosing a proper feeding regime. This chapter aims to teach the reader: the feeding habits and behavior of fishes and crustaceans; the structural adaptation in the anatomy of the digestive tract; the various organs of the digestive systems of fishes and crustaceans and their functions; nutrient digestion and absorption by fishes and the fate of digested and undigested food; the factors that affect the rate of digestion and absorption; and the feeding process in fish.
Intensive culture of milkfish Chanos chanos in polyculture with white shrimp Penaeus indicus or mud crab Scylla serrata in brackishwater earthen ponds GS Jamerlan, RM Coloso & NV Golez - 2014 - Aquaculture Department, Southeast Asian Fisheries Development Center
Series: Aquaculture extension manual; No. 57A 30-page extension manual describing the biology, site selection, pond management and harvest & post-harvest of milkfish intensive polyculture in earthen pond.
ArticleOM Millamena, NV Golez, JAJ Janssen & M Peschcke-Koedt -
The Israeli Journal of Aquaculture-Bamidgeh, 2000 - Society of Israeli Aquaculture and Marine BiotechnologyThe nutritive value of processed meat solubles, Protamino Aqua, a by-product from slaughter-houses, was examined in a growth trial with juvenile tiger shrimp Penaeus monodon. Experimental diets were formulated to contain processed meat solubles and/or squid meal as a partial replacement of fish meal. Dietary treatments consisted of diets (1) 5% processed meat solubles, no squid meal; (2) 2% processed meat solubles and 3% squid meal; (3) 5% squid meal, no meat solubles; (4) no meat solubles, no squid meal (control) and (5) commercial shrimp feed. The water stability of the diets was tested. Diets were fed to P. monodon postlarvae, PL20, with a mean body weight of 0.014 g, reared in tanks for 60 days. Results showed that survival of shrimp fed the various diets did not significantly differ (p>0.05). The only significant difference in growth performance was that the weight gain of shrimp fed diet 3 was significantly better (p<0.05) than that of shrimp fed the control diet. The protein efficiency ratio was best in shrimp fed diets containing processed meat solubles and poorest in shrimp receiving commercial feed. Protamino Aqua has a water stability similar to that of the control diet and commercial feed and appears to be efficiently utilized by juvenile P. monodon. The study showed that processed slaughterhouse by-products can be a cost-effective replacement for fish meal in tiger shrimp feeds.
Book chapterNV Golez - In OM Millamena, RM Coloso & FP Pascual (Eds.), Nutrition in Tropical Aquaculture: Essentials of fish nutrition, feeds, and feeding of tropical aquatic species, 2002 - Aquaculture Department, Southeast Asian Fisheries Development CenterThis chapter will help the reader understand and appreciate the basic principles of processing, preparation, storage, and quality control in the preparation of aquafeeds. The material in this section is presented in sequence beginning with the processing of basic ingredients to remove antinutritional factors, followed by steps in feed preparation, from the easiest to the more complex processes, and storage. This chapter presents methods and equipment that are useful not only for feed millers, but also for extension workers and fish farmers.