Recent research on the impact of institutions su¤ers from historical, theoretical, and methodological problems. The historical issue is whether the initially poorer countries became wealthier, as Acemoglou, Johnson, and Robinson (2002) would have us believe. The theoretical question is whether the institutions that should matter are those that protect property rights or those that coordindate i...

Introduction Conclusions References

Parasitic diseases are harmful and limiting factors in breeding and rearing ornamental fish industry. In this study, 400 apparently healthy ornamental fishes from five species (each species 80 specimens) including: Goldfish (Carassius auratus), guppy (Poecilia reticulate), angelfish (Pterophyllum scalare), discus (Symphsodon discus) and sailfin mollies (Poecilia latipinna) was obtained from a l...

Discussions on farm animal welfare have become frequent, especially in developed countries. The aim of this research was to study the perception of fish sentience, welfare and slaughter by highly educated citizens from Bogotá, Colombia, and Curitiba, Brazil. An online survey with 12 questions presented as open-ended, multiple choice and 5-point Likert-type scale formats was available to respond...

Fish farming is promoted in the Republic of Benin to meet demands fish consumption and increase exports neighbouring countries. Targeting farm policy interventions efficiency heterogeneous systems a challenge. Farm type delineation allows for simplifying diversity systems. Multivariate statistical techniques combined with Calinski Harabasz pseudo F statistic bootstrapping were applied determine...

Long chain omega-3s (DHA and EPA) are a specific group of polyunsaturated fatty acids that are essential components of dietary fats and oils. They are critical elements of fish nutrition, especially in early stages of life. Companion animals can also experience health benefits from long chain omega-3s in their diets. Finally, omega-3s can play a positive role in the reproductive function of far...

Integrated fish farming combines livestock production with fish farming. Animal manure is shed directly into a fish pond as fertilizer and supports the growth of photosynthetic organisms. The livestock, mainly chickens and pigs, is often fed feed containing growth promoters. In this study we investigated the impact of integrated fish farming on the levels of antimicrobial-resistant bacteria in ...

Macrophage aggregate (MA) morphometry and pigment composition are believed to be dependent on the species, age, and health status of the fish. The aim of this study was to characterize a "normal" morphometry baseline of spleen and kidney MAs in blue gourami Trichogaster trichopterus and freshwater angelfish Pterophyllum scalare. Three size-classes of clinically normal fish were analyzed. Blue g...

A field experiment was established in Bocas Del Tom, Panama to examine the relationship between sessile organisms living on mangrove prop roots and fish communities. Artificial mangrove roots (AMR) with different sets of artificial (AE) or real epibionts were established in five different locations in two separate years. Fish species in each plot were identified, counted, and their size estimat...

When inundated by floodwaters, river floodplains provide critical habitat for many species of fish and wildlife, but many river valleys have been extensively leveed and floodplain wetlands drained for flood control and agriculture. In the Central Valley of California, USA, where less than 5% of floodplain wetland habitats remain, a critical conservation question is how can farmland occupying th...