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Journal of Coastal Life Medicine 2014年第5期2卷 344-349页

作者： Hasna Kadri Sondes Marouani Mohamed Nejmeddine Bradai Abderrahmen Bouaïn Eric Morize National Institute of Science and Technology of the Sea SfaxB.P.1035Sfax 3018Tunisia Faculty of Sciences of Sfax BP 8023028 SfaxTunisia Lemar/IRD 230 Broennou 29870 LandédaFrance

Objective:To investigate the length distribution,sex ratio,length-weight relationship,age and growth of Raja radula in the Gulf of Gabes.Methods:The age and growth characteristic of the rough skate(Raja radula)inhabiting in the Gulf of Gabes(Central Mediterranean Sea)was determined.A total of 1250 specimens were sampled.According to the marginal increment band its growth was annual.Results:The growth parameters were derived by using the von-Bertalanffy method and were separately evaluated as follows:TL∞=97.2 cm,K=0.15 y^(-1),t_(o)=0.35,and W_(∞)=5.28 kg,and TL∞=76.4 cm,K=0.22 y^(-1),to=0.16,and W∞=3.77 kg,for females and males respetively.The maximum age was 12 years for females and 10 years for males.Conclusions:Results from this research will provide a starting point to develop a management plan for the rough skate in the Gulf of Gabes.Further investigations are necessary to quantify the impact of the existing regulations on the population dynamics and recruitment patterns of this species in the region.

关键词： age and growth Mediterranean Sea Gulf of Gabes Vertebra Raja radula

age,growth and length-weight relationship of the white skate,Rostroraja alba(Linnaeus,1758)(Chondrichthyans:Rajidae),from the Gulf of Gabes(Tunisia,Central Mediterranean)

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Journal of Coastal Life Medicine 2014年第6期2卷 421-425页

Objective:To investigate the length distribution,sex ratio,length-weight relationship,age and growth of Rostroraja alba in the Gulf of Gabes.Methods:This study estimated age and growth of the white skate,Rostroraja alba by counting vertebral band pairs from 112 specimens taken by commercial fisheries during 2006-2009 from the Gulf of Gabes(Southern Tunisia,Central Mediterranean Sea).Results:This is the first and only known information in regards to the age and growth of this species in Tunisia.Vertebra diameter was strongly correlated with total length and age,which were expressed by linear or cubic regression equations.The oldest female in this study was 35 years and 160 cm,whereas the oldest male was 32 years and 150 cm.The von Bertalanffy growth parameters were TL_(∞)=(202.26±3.40)cm,K=(0.040±0.038)/year and t_(0)=(1.84±0.01)10^(-1)/year for females and TL_(∞)=(198.60±3.61)cm,K=(0.060±0.076)/year and t_(0)=(1.28±0.04)/year for males.Conclusions:This study would be an effective tool for fishery biologists,managers and conservationists to initiate management strategies and regulations for the sustainable conservation of the remaining stocks of this species in the Gulf of Gabes(Southern Tunisia)ecosystem.

关键词： age and growth Mediterranean Sea Gulf of Gabes Vertebra Rostroraja alba

Climate-induced life cycle and growth variations of neon flying squid(Ommastrephes bartramii)in the North Pacific Ocean

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Aquaculture and Fisheries 2023年第2期8卷 211-220页

作者： Yan Wang Peiwu Han Zhou Fang Xinjun Chen College of Marine Sciences Shanghai Ocean UniversityShanghai201306China National Engineering Research Center for Oceanic Fisheries Shanghai Ocean UniversityShanghai201306China Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources Ministry of EducationShanghai Ocean UniversityShanghai201306China Key Laboratory of Oceanic Fisheries Exploration Ministry of Agriculture and Rural AffairsShanghai201306China Scientific Observing and Experimental Station of Oceanic Fishery Resources Ministry of Agriculture and Rural AffairsShanghai201306China

Climate change has had large impacts on marine animals,including neon flying squid Ommastrephes bartramii(O.bartramii)in the North Pacific Ocean.O.bartramii statoliths from 2012,2015,and 2016 were used to evaluate the variations in life cycle events.The relationship between mantle length and body weight showed significant differences between years and gender.The oldest squid was collected in 2016 at 271 days old,further proving that O.bartramii has nearly a 1-year life span.The hatching season ranged from December to May and the peak hatching time in 2015 was one-half month later than in 2012 and 2016.growth rates varied with environmental factors such as sea surface temperature(SST)and chlorophyll a concentration(chl.a),indicating that higher SST and chl.a concentrations led to faster growth.An extreme El Ni˜no event with lower SST in 2015 also led to younger age class and slower growth rates.The occurrence of differences in body size and growth rates between years,caused by the interannual variations of environmental factors,makes it necessary to use separate growth curves for different years when analyzing North Pacific O.Bartramii populations.

关键词： Ommastrephes bartramii Climate change age and growth North pacific ocean

Fisheries management of round sardinella Sardinella aurita along North Sinai coast

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Journal of Coastal Life Medicine 2016年第7期4卷 505-509页

作者： Ahmed Mohamed Al-beak General Authority for Fish Resources Development(GAFRD) CairoEgypt

Objective:To estimate the biological and population parameters required for proposing a preparation to sustain and manage this valuable fish resource.Methods:Aging was done by scales reading,and growth was estimated by using the back-calculation method.The values of growth parameters L_(∞),k and t_(o)were calculated by von Bertalanffy model.Results:The results of growth parameters L_(∞),k and t_(o)were 28.36 cm,0.184 per year and-0.8437 per year,respectively.Mortality coefficient,survival and exploitation rates estimated to perceive yield per recruit and biomass per recruit.Conclusions:Biological reference points and virtual population analysis were prepared to plan appropriate managements forSardinella aurita fisheries.

关键词： Eastern Mediterranean age and growth Stock assessment Fisheries management Sardinella aurita

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神农架嘉陵颌须鮈年龄与生长的初步研究

华中农业大学学报 1985年第1期 41-48页

作者：谢从新华中农学院水产系

对神农架关门河所采得的263尾Gnathopogon herzensteini（Gunther）作常规生物学测定后,进一步研究指出:体长与鳞长呈直线相关,L=12.3062+1.5470R,r=0.9120>r0.01。体长与体重、体长与纯体重均呈幂函数的增长关系,W=1.098×10L,Wn=1.152×10L。应用Von Bertalanffy生长方程拟合该鱼的一般生长规律,计算得出的生长参数为:L=157.39毫米,W=85.04克,Wn=63.66克,K=0.2401,t=-0.187,拐点年龄为4.4年,拐点总体长为25.17克,拐点纯体重为18.84克。

关键词： Gnathopogon herzensteini (Günther) age and growth Total bocly weight Net body weight Scale length Body length

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武汉地区克氏原螯虾的生物学研究

华中农业大学学报 1985年第1期 16-24页

作者：魏青山华中农学院水产系

克氏原螯虾是从国外移植的一种大型淡水虾类,目前在国内许多省市均有出产。本文根据在武汉地区对其生物学特性的研究结果指出:该虾夜间活动和觅食,白天常藏于洞穴中,少数在草丛中栖居。体长4厘类以上的个体的主要食物为水生高等植物、... 详细信息

克氏原螯虾是从国外移植的一种大型淡水虾类,目前在国内许多省市均有出产。本文根据在武汉地区对其生物学特性的研究结果指出:该虾夜间活动和觅食,白天常藏于洞穴中,少数在草丛中栖居。体长4厘类以上的个体的主要食物为水生高等植物、丝状藻类和植物碎片;次要食物为水生昆虫及其幼虫,偶然性食物为硅藻以及鱼类和蛙类的病残个体或死尸。I龄虾的体长生长快,雌体达V龄、体长达11.49厘米和雄体达Ⅲ龄、体长达10.90厘米后,体长生长减慢,体重剧增。雌雄个体比为1.00:1.10,均在Ⅲ龄达性成熟。雌体产卵期一般在10月份,4-5月份也可见少数产卵个体。最小产卵个体6.95厘米。雌体长6.95-11.00厘米个体的产卵数变动在80-267粒。

关键词： Crayfish (Procambarus clarkii) Biology Habits age and growth Reproduction