The present study investigated the applicability of integrated polychaete-fish culture for fish waste removal to offset negative impact induced by organic benthic enrichment.A field study demonstrated that deposition ...The present study investigated the applicability of integrated polychaete-fish culture for fish waste removal to offset negative impact induced by organic benthic enrichment.A field study demonstrated that deposition rate was significantly higher underneath the fish farm than that in control area.The material settling under the farm was characterized by a high amount of fish feces(45%) and uneaten feed(27%).Both feeding rate(FR) and apparent digestibility rate(ADR) increased with decreasing body weight,as was indicated by significantly a higher rate observed for the groups containing smaller individuals in a lab study.The nutrient in fresh deposited material(De) was higher than that in sediments collected under the farm(Se),resulting in lower feces production but higher apparent digestibility rate for the De group as feeding rate was similar.Consequently,higher nutrient removal efficiency was observed in the De group.A mass balance approach indicated that approximately 400–500 individuals m^(-2) is required for removing all waste materials deposited underneath the fish farm,whereas abundance can be lower(about 300–350 individuals m^(-2)) when only the fish waste needs to be removed.The results showed that a significant amount of waste had been accumulated in the fish cages in Sanggou Bay.The integration of fish with P.aibuhitensis seems promising for preventing organic pollution in the sediment and therefore is an effective strategy for mitigating negative effect of fish farms.Thus such integration can become a new IMTA(integrated multi-trophic aquaculture) model in Sanggou Bay.展开更多
Based on the field survey of the traditional village in Shanggantang,Hunan province,P.R.China,we analyzed ecological strategies in aspects of the whole human habitation environment and vernacular building human habita...Based on the field survey of the traditional village in Shanggantang,Hunan province,P.R.China,we analyzed ecological strategies in aspects of the whole human habitation environment and vernacular building human habitation environment.The ecological strategies included adapting to the local climate,reducing source consumption,utilizing local materials and so on.The research is to provide a reference to practice and theoretical development of eco-folk houses in the area.展开更多
Nine field trips carried out in Haikou Forestry Farm,Yunnan Province,P.R.China resulted in 681 specimens of wood-decaying fungi.The present paper summarizes 52 species collected that are distributed in 37 genera,16 fa...Nine field trips carried out in Haikou Forestry Farm,Yunnan Province,P.R.China resulted in 681 specimens of wood-decaying fungi.The present paper summarizes 52 species collected that are distributed in 37 genera,16 families,6 orders including their hosts and substrates.A checklist of wood-decaying fungi in Haikou Forestry Farm is also given.Phylogenetic analysis of ITS nrRNA gene region was performed for all the collected samples with maximum likelihood,maximum parsimony and Bayesian inference methods.The phylogenetic tree showed that fifty-two species nested in sixteen families belonging to six orders in Agaricomycetes.展开更多
基金supported by Primary Research&Development Plan of Shandong Province(2016GGF01068)the National Natural Science Foundation of China(Nos.31302193,41676147)+3 种基金Environment and Aquaculture Governance(CHN-2152,13/0033)Public Funds of Key Laboratory of East China Sea&Oceanic Fishery Resources Exploitation and Utilization,Ministry of Agriculture,P.R.China(2013K06)the Special Scientific Research Funds for Central Non-profit Institutes,Yellow Sea Fisheries Research Institutes(20603022015017)National Natural Science Foundation of China 41306117)
文摘The present study investigated the applicability of integrated polychaete-fish culture for fish waste removal to offset negative impact induced by organic benthic enrichment.A field study demonstrated that deposition rate was significantly higher underneath the fish farm than that in control area.The material settling under the farm was characterized by a high amount of fish feces(45%) and uneaten feed(27%).Both feeding rate(FR) and apparent digestibility rate(ADR) increased with decreasing body weight,as was indicated by significantly a higher rate observed for the groups containing smaller individuals in a lab study.The nutrient in fresh deposited material(De) was higher than that in sediments collected under the farm(Se),resulting in lower feces production but higher apparent digestibility rate for the De group as feeding rate was similar.Consequently,higher nutrient removal efficiency was observed in the De group.A mass balance approach indicated that approximately 400–500 individuals m^(-2) is required for removing all waste materials deposited underneath the fish farm,whereas abundance can be lower(about 300–350 individuals m^(-2)) when only the fish waste needs to be removed.The results showed that a significant amount of waste had been accumulated in the fish cages in Sanggou Bay.The integration of fish with P.aibuhitensis seems promising for preventing organic pollution in the sediment and therefore is an effective strategy for mitigating negative effect of fish farms.Thus such integration can become a new IMTA(integrated multi-trophic aquaculture) model in Sanggou Bay.
基金Funded by the Science and Technology Research Foundation of Hunan Government(No.08jj3106)
文摘Based on the field survey of the traditional village in Shanggantang,Hunan province,P.R.China,we analyzed ecological strategies in aspects of the whole human habitation environment and vernacular building human habitation environment.The ecological strategies included adapting to the local climate,reducing source consumption,utilizing local materials and so on.The research is to provide a reference to practice and theoretical development of eco-folk houses in the area.
基金supported by the Yunnan Fundamental Research Project(Grant No.202001AS070043)the Science Foundation of Southwest Forestry University(Project No.111715).
文摘Nine field trips carried out in Haikou Forestry Farm,Yunnan Province,P.R.China resulted in 681 specimens of wood-decaying fungi.The present paper summarizes 52 species collected that are distributed in 37 genera,16 families,6 orders including their hosts and substrates.A checklist of wood-decaying fungi in Haikou Forestry Farm is also given.Phylogenetic analysis of ITS nrRNA gene region was performed for all the collected samples with maximum likelihood,maximum parsimony and Bayesian inference methods.The phylogenetic tree showed that fifty-two species nested in sixteen families belonging to six orders in Agaricomycetes.
