Culture of cobia Rachycentron canadum (L) in near‐shore cages off the Brazilian coast     

Luís André Sampaio  Cauê Bonucci Moreira  Kleber Campos Miranda‐Filho  Artur Nishioka Rombenso 《Aquaculture Research》2011,42(6):832-834

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Effects of no‐take area size and age of marine protected areas on fisheries yields: a meta‐analytical approach     

Frederic Vandeperre  Ruth M. Higgins  Julio Sánchez‐Meca  Francesc Maynou  Raquel Goñi  Pablo Martín‐Sosa  Angel Pérez‐Ruzafa  Pedro Afonso  Iacopo Bertocci  Romain Crec’hriou  Giovanni D’Anna  Mark Dimech  Carmelo Dorta  Oscar Esparza  Jesús M. Falcón  Aitor Forcada  Ivan Guala  Laurence Le Direach  Concepción Marcos  Celia Ojeda‐Martínez  Carlo Pipitone  Patrick J. Schembri  Vanessa Stelzenmüller  Ben Stobart  Ricardo S. Santos 《Fish and Fisheries》2011,12(4):412-426

Marine protected areas (MPAs) are often promoted as tools for biodiversity conservation as well as for fisheries management. Despite increasing evidence of their usefulness, questions remain regarding the optimal design of MPAs, in particular concerning their function as fisheries management tools, for which empirical studies are still lacking. Using 28 data sets from seven MPAs in Southern Europe, we developed a meta‐analytical approach to investigate the effects of protection on adjacent fisheries and asking how these effects are influenced by MPA size and age. Southern European MPAs showed clear effects on the surrounding fisheries, on the ‘catch per unit effort’ (CPUE) of target species, but especially on the CPUE of the marketable catch. These effects depended on the time of protection and on the size of the no‐take area. CPUE of both target species and the marketable catch increased gradually by 2–4% per year over a long time period (at least 30 years). The influence of the size of the no‐take area appeared to be more complex. The catch rates of the entire fishery in and around the MPA were higher when the no‐take areas were smaller. Conversely, catch rates of selected fisheries that were expected to benefit most from protection increased when the no‐take area was larger. Our results emphasize the importance of MPA size on its export functions and suggest that an adequate, often extended, time frame be used for the management and the evaluation of effectiveness of MPAs.  相似文献   

Do boating and basking mix? The effect of basking disturbances by motorboats on the body temperature and energy budget of the northern map turtle          下载免费PDF全文

Sofia M. R. Jain‐Schlaepfer  Gabriel Blouin‐Demers  Steven J. Cooke  Grégory Bulté 《水产资源保护:海洋与淡水生态系统》2017,27(2):547-558

Is it possible to differentiate between environmental and fishery effects on abundance‐biomass variation? A case study of blackspot seabream (Pagellus bogaraveo) in the Strait of Gibraltar          下载免费PDF全文

Juan Carlos Gutiérrez‐Estrada  Juan Gil‐Herrera  Inmaculada Pulido‐Calvo  Ivone Alejandra Czerwinski 《Fisheries Oceanography》2017,26(4):455-475

We assessed the potential for simulation and modelling of the blackspot seabream (Pagellus bogaraveo) population in the Strait of Gibraltar to discriminate the environmental effects of fishery impacts. A discrete biomass–abundance dynamic model was implemented to obtain a simulated monthly time series of blackspot seabream biomass. On this simulated time series, autoregressive integrated moving average (ARIMA) models were fitted. The best ARIMA fit provided a significant correlation of 0.76 and persistence index higher than 0.85. The proportion of variance non‐explained by the ARIMA models was correlated with a time series of sea surface temperature (SST) and North Atlantic Oscillation (NAO). The analysis of global, annual and winter correlation between the proportion of variance not explained by the ARIMA models and environmental variables showed that significant associations were not detected over the full time series. Our analysis therefore suggests that overexploitation is the main factor responsible for the commercial depletion of blackspot seabream in the Strait of Gibraltar.  相似文献   

Invasive Chinese pond mussel Sinanodonta woodiana threatens native mussel reproduction by inducing cross‐resistance of host fish          下载免费PDF全文

Seth W. Donrovich  Karel Douda  Věra Plechingerová  Kateřina Rylková  Pavel Horký  Ondřej Slavík  Huan‐Zhang Liu  Martin Reichard  Manuel Lopes‐Lima  Ronaldo Sousa 《水产资源保护:海洋与淡水生态系统》2017,27(6):1325-1333

Effects of the dietary protein to energy ratio on growth,feed utilization and body composition in Macrobrachium nipponense          下载免费PDF全文

N.‐N. Zhang  Q.‐Q. Ma  W.‐J. Fan  Q. Xing  Y.‐L. Zhao  L.‐Q. Chen  J.‐Y. Ye  M.‐L. Zhang  Z.‐Y. Du 《Aquaculture Nutrition》2017,23(2):313-321

Oriental river prawn (Macrobrachium nipponense) has been widely cultured in Asian countries. However, its nutritional studies are very limited. In the present 8‐week study, we investigated the effects of dietary protein to energy ratio (P/E ratio) on the growth, feed utilization and body composition in juvenile M. nipponense (initial weight 0.302 ±0.03 g). Two‐factor experiment was designed and nine semi‐purified diets were formulated to contain three lipid levels (20, 80 and 140 g kg^?1) and three protein levels (330, 380 and 430 g kg^?1), producing P/E ratios from 16.5 to 23.4 mg KJ^?1 protein. The results indicated that the growth, survival rate and protein efficiency were dose dependently improved by the increased dietary lipid, but not dietary protein content. Increased dietary lipid content and/or protein content increased lipid accumulation in whole body, hepatopancreas and muscle, but did not change the feed intake and hepatopancreas weight. In conclusion, our present study indicated that M. nipponense is a species with relatively high‐energy requirement. It could utilize dietary lipid content up to 140 g kg^?1, while the dietary protein with more than 330 g kg^?1 would not promote growth and protein efficiency. Taken together, 330 g kg^?1 dietary protein and 140 g kg^?1 dietary lipid level with P/E ratio 16.49 could be optimum for M. nipponense.  相似文献   

Effect of cultivated copepods (Acartia tonsa) in first‐feeding of Atlantic cod (Gadus morhua) and ballan wrasse (Labrus bergylta) larvae          下载免费PDF全文

G. Øie  T. Galloway  M. Sørøy  M. Holmvaag Hansen  I.A. Norheim  C.K. Halseth  M. Almli  M. Berg  M.R. Gagnat  P.‐A. Wold  K. Attramadal  A. Hagemann  J.O. Evjemo  E. Kjørsvik 《Aquaculture Nutrition》2017,23(1):3-17

The aim of this study was to compare the nutritional composition and effects of short periods with cultivated copepod nauplii versus rotifers in first‐feeding. Atlantic cod (Gadus morhua) and ballan wrasse (Labrus bergylta) larvae were given four different dietary regimes in the earliest start‐feeding period. One group was fed the copepod Acartia tonsa nauplii (Cop), a second fed enriched rotifers (RotMG), a third fed unenriched rotifers (RotChl) and a fourth copepods for the seven first days of feeding and enriched rotifers the rest of the period (Cop7). Cod larvae were fed Artemia sp. between 20 and 40 dph (days posthatching), and ballan wrasse between 36 and 40 dph, with weaning to a formulated diet thereafter. In addition to assessing growth and survival, response to handling stress was measured. This study showed that even short periods of feeding with cultivated copepod nauplii (7 days) had positive long‐term effects on the growth and viability of the fish larvae. At the end of both studies (60 days posthatching), fish larvae fed copepods showed higher survival, better growth and viability than larvae fed rotifers. This underlines the importance of early larval nutrition.  相似文献   

Optimization of phosphorus content in high plant protein practical diets for Senegalese sole (Solea senegalensis,Kaup 1858) juveniles: influence on growth performance and composition of whole body and vertebrae          下载免费PDF全文

E. Salas‐Leiton  J. Dias  P. Gavaia  A. Amoedo  L.M.P. Valente 《Aquaculture Nutrition》2017,23(1):18-29

Practical diets containing PP sources were elaborated. Increasing levels of di‐calcium phosphate were added to diets leading to five different dietary available P levels: 2.5, 3.2, 6.0, 6.5 and 8.0 g kg^?1 dry diet. The dietary treatments were tested in 13.5 g Senegalese sole juveniles throughout an 82‐day experimental period. Dietary P content had no effect on the productive parameters, while nutrient intake was also similar among dietary treatments, except P intake. Dry matter ADC ranged between 54.9% and 64.0%, and the highest P ADCs value (47.2 ± 0.7%) was achieved in fish fed AP6.0. Dietary phosphorus level significantly influenced body lipid and P compositions. Regression analysis performed on whole‐body P and ash contents fitted to quadratic models. Vertebral bone P content was low but increased significantly with increasing dietary P levels. Bone density and deformities occurrence were, however, similar between experimental conditions. An altered status of bone formation–resorption processes in soles fed the lowest P content diet might be inferred from ALP and TRAP activities. In conclusion, overall results state a high tolerance of Senegalese sole to low P content diets and support the utilization of practical diets with high plant protein content.  相似文献   

Effect of environmental conditions on the seasonal and inter‐annual variability of small pelagic fish abundance off North‐West Africa: The case of both Senegalese sardinella          下载免费PDF全文

Modou Thiaw  Pierre‐Amaël Auger  Fambaye Ngom  Timothée Brochier  Saliou Faye  Ousmane Diankha  Patrice Brehmer 《Fisheries Oceanography》2017,26(5):583-601

The objective of this study was to assess the effect of environmental variations on the abundance of Sardinella aurita and Sardinella maderensis in Senegalese waters in the upwelling system. Monthly data indicating the abundance of sardinella were first estimated from commercial statistics, using Generalized Linear Model from 1966 to 2011. Abundance indices (AIs) were then compared with environmental indices, at the local scale, a Coastal Upwelling Index (CUI) and a coastal Sea Surface Temperature (SST) index, and on a large scale, the North Atlantic Oscillation (NAO), the Atlantic Multidecadal Oscillation (AMO) and the Multivariate El Niño Southern Oscillation Index (MEI), using correlations and times series analyses. The results showed that the abundance of sardinella is determined by a strong seasonal pattern and inter‐annual fluctuations. The abundance of S. aurita peaked in spring and in autumn, whereas that of S. maderensis peaked in the warm season (July–September). The trend of the sardinella abundance was significantly correlated with the CUI, especially in autumn and spring. Interannual fluctuations of S. maderensis and S. aurita abundance are, respectively, driven by the precocity and the duration of the upwelling season that is attributed to distinct migration patterns. Both sardinella species also respond with a delay of around 4 years to the winter NAO index and the autumn CUI, and the AMO index, respectively, both related to migration patterns. The wide variations in sardinella biomass are caused by variations in environmental conditions, which should be considered in the implementation of an ecosystem‐based approach in sardinella stocks management.  相似文献   

Effects of dietary Rhodiola rosea on growth,body composition and antioxidant capacity of white shrimp Litopenaeus vannamei under normal conditions and combined stress of low‐salinity and nitrite          下载免费PDF全文

Y. Wang  J.‐P. Liang  Y.‐F. Duan  J. Niu  J. Wang  Z. Huang  H.‐Z. Lin 《Aquaculture Nutrition》2017,23(3):548-559

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