Resource Use by a Mediterranean Rocky Slope Fish Assemblage   总被引：1，自引：0，他引：1  

M. Fasola    L. Canova    F. Foschi    O. Novelli  M. Bressan 《Marine Ecology》1997,18(1):51-66

Abstract. Resource partitioning has been intensely studied in fish assemblages of tropical reefs, whereas surprisingly little research has been conducted on the benthic Mediterranean. Here we describe the composition of a fish assemblage of the rocky slopes at Tremiti Islands, southern Adriatic Sea, the vertical distribution at depths from 0 to 42 m, habitat choice and food use of the different species, and we identify the resources along which species are ecologically segregated. Species composition and fish density showed high similarities with the few other assemblages that have been censused on the rocky coasts of the Mediterranean. We observed a wide overdispersion among species in their use of food and habitat, while very little segregation occurred at the level of depth distribution. No coincident use of food, habitat or active periods occurred among fish species, and no trophic guilds exist in the three-dimensional niche.  相似文献   

Predation rates by North Sea cod (Gadus morhua) - predictions from models on gastric evacuation and bioenergetics     

Hansson  S.; Rudstam  L. G.; Kitchell  J. F.; Peppard  P. E.; Hilden  M.; Johnson  B. L. 《ICES Journal of Marine Science》1996,53(1):107-114

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A modelling study of the influence of environment and food supply on survival of Crassostrea gigas larvae     

Hofmann  Eileen E; Powell  Eric N; Bochenek  Eleanor A; Klinck  John M 《ICES Journal of Marine Science》2004,61(4):596-616

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养殖条件下暗纹东方鲀摄食与食性的初步分析   总被引：2，自引：0，他引：2  

杨州  华元渝 《海洋湖沼通报》2002,(3):53-57

本文报道了养殖条件下暗纹东方Tun的摄食行为和不同生长阶段食物组成的变化，肠道食物分析表明，除主食配合饲料外，同时也摄食一些天然饵料（底栖类及小杂鱼等）。其肠长与体长呈直线相关，回归方程为Y．2.85x-32.36(X为体长，Y为肠长，单位：mm，相关系数R^2=0.9987),肠长为体长的2.35-2.74倍。同时对其食性的相关问题进行了讨论。  相似文献   

Mathematical model of fish schooling behaviour in a set-net     

Takagi  Tsutomu; Moritomi  Yutaka; Iwata  Jyun; Nakamine  Hiroshi; Sannomiya  Nobuo 《ICES Journal of Marine Science》2004,61(7):1214-1223

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Sources and transfer of organic matter in food webs of a Mediterranean coastal environment: Evidence for spatial variability   总被引：4，自引：0，他引：4  

Salvatrice Vizzini  Antonio Mazzola 《Estuarine, Coastal and Shelf Science》2006,66(3-4):459-467

The spatial variability in the food web structure of a Mediterranean semi-enclosed coastal environment (Stagnone di Marsala, Italy) was investigated using stable carbon and nitrogen isotopes. Organic matter sources and consumers were sampled in two locations with different environmental features (e.g. hydrodynamic regime, open-sea influence, vegetal coverage). Overall more ¹³C-enriched and ¹⁵N-depleted values were found in the central location than in the southern for organic matter sources and consumers. Pelagic consumers (zooplankton and juveniles of transient fish) showed slight spatial differences and in both locations seemed to depend on phytoplankton as the ultimate energy source. In contrast, benthic consumers (epifauna and resident fish) exhibited remarkable differences between locations. Spatial differences in organic matter sources were smaller than in benthic consumers and thus consumers presumably exploited different ultimate organic matter sources in the two locations. Sedimentary organic matter and epiphytes appeared to be the main primary producers transferred within the food web in both locations, and seagrasses seemed to play a non-negligible trophic role in the central location. The results of this paper corroborate the finding food webs are characterised by high spatial variability even on a small spatial scale and environmental heterogeneity more than primary production that seems to influence the trophic role of autotrophs.  相似文献   

Relationship between phytoplankton production and cod production on the Faroe Shelf   总被引：3，自引：2，他引：3  

Steingrund  Petur; Gaard  Eilif 《ICES Journal of Marine Science》2005,62(2):163-176

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Transparent exopolymer particles (TEP) in aquatic environments   总被引：7，自引：0，他引：7  

U. Passow   《Progress in Oceanography》2002,55(3-4)

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河北省沿海8个经济鱼种的饵料组成及其相互关系的研究     

孙介华  刘宏春 《海洋湖沼通报》1991,(2):89-94

本文分析了河北省沿海小黄鱼、黄姑鱼、蓝点鲅、牙鲆、半滑舌鳎、鲈鱼、鯒鱼和孔鳐的饵料组成及其相互关系。主要结果有:(1)在饵料组成中,主要的饵料生物是日本鼓虾、脊尾褐虾、虾蛄、中国毛虾、黄鲫、日本鳀鱼、钝尖尾鰕虎鱼和尖尾鰕虎鱼等,这些主要饵料生物基本上都是群众渔业的重要捕捞对象;(2)种间存在不同程度的饵料竞争关系;(3)捕食与被捕食关系分别存在于鲈鱼与小黄鱼、鲈鱼与半滑舌鳎、鯒鱼与小黄鱼的种间。本文从饵料保障的角度,探讨了上述8个经济鱼种资源的恢复与其饵料生物资源的渔业捕捞之间的关系。  相似文献   

Seasonal variation in the consumption of food by fish in the North Sea and implications for food web dynamics   总被引：7，自引：3，他引：7  

Greenstreet  Simon P. R.; Bryant  Andrew D.; Broekhuizen  Niall; Hall  Stephen J.; Heath  Mike R. 《ICES Journal of Marine Science》1997,54(2):243-266

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