沙蚕的营养分析与功能研究   总被引：13，自引：0，他引：13  

滕瑜  王印庚  王彩理 《海洋科学进展》2004,22(2):215-218

对2种双齿围沙蚕和国产鱼粉进行了营养组成分析。结果表明,2种双齿围沙蚕在营养构成上差别不大,只是在脂肪和灰分以及钙、铁上有差别;与国产鱼粉相比,在所测定的各种营养指标上,2种双齿围沙蚕的营养性超过国产鱼粉：其中呈味氨基酸超过高达5％左右,各种微量元素也相差较大。沙蚕的营养性、诱食性以及适口性均超过国产鱼粉。  相似文献   

Physiological responses of the seagrass Posidonia oceanica as indicators of fish farm impact     

Pérez M  García T  Invers O  Ruiz JM 《Marine pollution bulletin》2008,56(5):869-879

  相似文献   

Impact of fish farming on the distribution of phosphorus in sediments in the middle Adriatic area   总被引：1，自引：1，他引：0  

Matijević S  Kuspilić G  Kljaković-Gaspić Z  Bogner D 《Marine pollution bulletin》2008,56(3):535-548

During the last decade, intensive fish farming developed along the central Croatian coast, creating a need to study and evaluate its potential influence on unaffected sites. We considered phosphorus as an indicator of the influence of fish farming and investigated the distribution of phosphorus forms in sediment from several fish farms and marine areas of different trophic status in the middle Adriatic. Analyses of samples were performed with modified SEDEX techniques. Our results indicated that authigenic apatite phosphorus showed no significant differences among the investigated stations, while organic phosphorus concentrations reflected the trophic status of the station area. Below-cage sediment was characterized by enhanced fish debris phosphorus and low detrital apatite phosphorus concentrations, while sediment from an anthropogenically influenced bay showed the highest values of iron bound phosphorus species. Among the different P fractions, fish debris phosphorus proved to be the most sensitive indicator of the influence of fish farming on marine sediment.  相似文献   

Monitoring the sea change: preliminary assessment of the conservation value of nearshore reefs, and existing impacts, in a high-growth, coastal region of subtropical eastern Australia     

Smith SD  Rule MJ  Harrison M  Dalton SJ 《Marine pollution bulletin》2008,56(3):525-534

In northern NSW, Australia, coastal populations are forecast to increase dramatically over the next 25 years (the "sea change"). However, management of the effects of development on marine communities is hampered by the lack of data on key habitats. Consequently, we developed a protocol to assess the biodiversity and current human impacts on nearshore reefs, habitats that will be readily affected by coastal development. We assessed four reefs adjacent to each of three population centres targeting fish, mollusc and sessile benthic communities, and debris loads. Community structure was highly variable over all spatial scales indicating that reefs should not be considered equivalent within the planning framework. While, debris loads were relatively low on most reefs, those with highest conservation value also had the highest debris loads suggesting potential conflict between human use and long-term sustainability of reefal communities. Without intervention, this situation will be exacerbated in the future.  相似文献   

Amelioration of marine farming impact on the benthic environment using artificial reefs as biofilters     

Gao QF  Shin PK  Xu WZ  Cheung SG 《Marine pollution bulletin》2008,57(6-12):652-661

An in situ monitoring of the sediment characteristics and macrobenthic communities was undertaken at a marine fish culture site in subtropical waters of Hong Kong before and after the deployment of biofilters which were made of cement concrete artificial reef (AR) structures. According to the distance to the boundary of the fish cages, 6 points were selected as sampling stations: 2 at the fish cages, 2 near the boundary of the fish culture area, and 2 reference sites further away from the culture area. Bimonthly sediment samples were collected for analysis of silt-clay fraction (SCF), moisture content (MC), total organic carbon (TOC), total Kjeldahl nitrogen (TKN) and total phosphorus (TP). The macrobenthos (>0.5mm) present in the sediment were sorted, identified and enumerated. TOC, TKN and TP levels at the fish cage stations were consistently higher than those at the reference stations over the 1-year pre-AR and 2-year post-AR deployment monitoring period. The diversity of macrofauna was significantly reduced at the fish cage stations relative to the reference sites. The intermediary stations near the fish culture area showed a transitional state of disturbance. Over the 2-year post-AR deployment period, TOC, TKN and TP showed a decreasing trend at the fish cage and intermediary stations. More diverse macrofaunal communities were recorded at the fish cage stations, with species diversity H'increasing from 0-1 at the beginning of the AR deployment to H'>2 at the end of the study. The present results demonstrated that artificial reefs can improve the benthic abiotic environment and biotic conditions beneath fish rafts which are deteriorated due to farming activities.  相似文献   

Fish mortality by impingement on the cooling-water intake screens of Britain's largest direct-cooled power station     

Greenwood MF 《Marine pollution bulletin》2008,56(4):723-739

An estimated 5.66 x 10(7) fish (summed quarterly 95% confidence intervals: 3.01 x 10(7)-1.07 x 10(8)) weighing 258.4 t (143.2-467.9 t) were killed on the cooling-water intake screens of the 2400 MW Longannet Power Station (Forth estuary) in January 1999--December 2000. Abundance and number of species (40) collected were close to predictions for a power station of this size and latitude. Potential losses of equivalent adult whiting (Merlangius merlangus), cod (Gadus morhua), and plaice (Pleuronectes platessa) through deaths of juveniles were estimated at 353.1 t (208.0-603.2 t) worth approximately euro 429,266 (euro 246,592-752,765) in 1999--2000. Fish catch-per-trawl in the estuary was generally not noticeably greater during a year of low water withdrawal (coal miners' strike of 1984--1985) when compared to other years from 1982 to 2001, except for gobies (Pomatoschistus spp.). A fish-return system is being tested at Longannet to reduce mortality.  相似文献   

Discriminating sources of PCB contamination in fish on the coastal shelf off San Diego, California (USA)     

Ed Parnell P  Groce AK  Stebbins TD  Dayton PK 《Marine pollution bulletin》2008,56(12):1992-2002

Management of coastal ecosystems necessitates the evaluation of pollutant loading based on adequate source discrimination. Monitoring of sediments and fish on the shelf off San Diego has shown that some areas on the shelf are contaminated with polychlorinated biphenyls (PCBs). Here, we present an analysis of PCB contamination in fish on the shelf off San Diego designed to discriminate possible sources. The analysis was complicated by the variability of species available for analysis across the shelf, variable affinities of PCBs among species, and non-detects in the data. We utilized survival regression analysis to account for these complications. We also examined spatial patterns of PCBs in bay and offshore sediments and reviewed more than 20 years of influent and effluent data for local wastewater treatment facilities. We conclude that most PCB contamination in shelf sediments and fish is due to the ongoing practice of dumping contaminated sediments dredged from San Diego Bay.  相似文献   

Sea-surface microlayer toxicity off the Florida Keys     

D. Rumbold  S. Snedaker 《Marine environmental research》1999,47(5):1008

A survey of sea-surface microlayer (SSML) toxicity was initiated off the Florida Keys in early 1993. Ex situ toxicity tests, based on the development of the sea urchin, Lytechinus variegatus, demonstrated that 59.2% of SSML samples taken from visibly slicked areas (n=27) were toxic compared to collected subsurface water. A random subset of samples tested a second time using a fish early life-stage test with embryos from the spotted seatrout, Cynoscion nebulosus, confirmed the presence of the toxicant. Results from a partial toxicity identification evaluation (TIE) procedure indicated that an organic compound(s) containing a non-polar functional group was the primary determinant of toxicity in all of the SSML samples tested. While subsequent GC-MS analyses failed to identify a specific compound, they did tend to rule out common xenobiotics, such as organochlorine pesticides as potential toxicants. Preliminary tests, done by an outside laboratory, indicated that two of the most toxic SSML samples contained a brevetoxin, a biotoxin produced by Gymnodinium breve. This is the first report of natural toxins concentrating in the SSML; however, without a completed TIE, including a Phase III—toxicity confirmation procedure, the identification of any toxic agent remains speculative.  相似文献   

Marine Fungi Against Aquaculture Pathogens and Induction of the Activity via Co‐Culture     

《洁净——土壤、空气、水》2017,45(8)

  相似文献   

Understanding how physical-biological coupling influences harmful algal blooms,low oxygen and fish kills in the Sea of Oman and the Western Arabian Sea     

Paul J. Harrison  Sergey Piontkovski  Khalid Al-Hashmi 《Marine pollution bulletin》2017,114(1):25-34

In the last decade, green Noctiluca scintillans with its symbiont and other dinoflagellates such as Cochlodinium polykrikoides, Prorocentrum micans and Scrippsiella trochoidea have become the dominant HABs, partially replacing the previously dominant diatoms and red Noctiluca scintillans, especially during the northeast monsoon. Fish kills in the Sea of Oman are linked to a slow seasonal decline in oxygen concentration from January to November, probably due to the decomposition of a series of algal blooms and the deep, low oxygen waters periodically impinging the Omani shelf. In the western Arabian Sea, cyclonic eddies upwell low oxygen, nutrient-rich water and the subsequent algal bloom decays and lowers the oxygen further and leads to fish kills. Warming of the surface waters by 1.2 °C over the last 5 decades has increased stratification and resulted in a shoaling of the oxycline. This has increased the probability and frequency of upwelling low oxygen water and subsequent fish kills.  相似文献