An experiment on the polyculture of carps with high valued small indigenous fish species (SIS) pabda (Ompok pabda) and gulsha (Mystus cavasius) was carried out in six months culture period to evaluate the production performance of carp with small indigenous fish pabda (Ompok pabda) and gulsha (Mystus cavasius) in the on-farm condition. Three stocking densities of pabda and gulsha were tested, k...

The main purpose of this study is measuring and comparing of peanut harvesting loss in manual and mechanical methods in addition to economic analysis of them. Hence, a field was selected in Astaneh-Ashrafiyeh and divided to three different plots. Two plots were applied to measure mechanical harvesting loss and third one was applied for manual harvesting loss. According to test results, the lowe...

—We used information from an angler recognition program to assess the relationship between lake-record weights of freshwater fishes captured by Texas anglers and two predictors of fish production and growth: reservoir surface area and growing-season length. The lake-record weights of two species, largemouth bass Micropterus salmoides and flathead catfish Pylodictis olivaris, were directly relat...

Lordosis of the haemal part vertebral column is a frequent abnormality in reared fish. Haemal lordosis develops during late larval and early juvenile life stages fish, mainly due to high swimming activity fish rearing tanks. In present study, we have examined whether recovers growth European seabass. Furthermore, aimed develop simple morphometric indices (PrAn1 PrAn2) that might link severity a...

Payang is a bag net fishing gear used to catch schools of fish. one the most commonly gears by fishermen in waters around PPN Brondong, Lamongan regency. This study aims examine and socio-economic characteristics fishermen. The method this research descriptive with purposive sampling technique. main components construction are floats, weights, float lines, weight ropes, wings, body I, II, bag. ...

The population size of fish stock is affected by the variability of its environment, both biologic and economic. The classical logistic growth equation is applied to simulate fish population dynamics. Environmental variation was included in the optimization of harvest to obtain a relation in which the maximum sustainable yield and biomass varied as the environment varied. The fluctuating enviro...

Abstract. In this paper we study a model for the harvesting of marine resources, described by an elliptic equation. Since the cost functionals have sublinear growth w.r.t. the pointwise intensity of fishing effort, optimal solutions are in general measure-valued. For the control problem, we prove the existence of optimal strategies. Uniqueness is established within a class of measures with smal...