【摘 要】
：
带鱼是南海西北部北部湾主要经济鱼类种群之一,估算其种群参数和评估其资源状况对北部湾渔业资源管理具有重要意义.本文利用2006-2016年北部湾带鱼(Trichiurus haumela)的生物学数据,通过长度贝叶斯生物量估算法(Length-based Bayesian Biomass Estimation Method,LBB)估算带鱼的渐近肛长(Linf)、最适开捕肛长(Lc_opt)、相对自然死亡率(M/k)、相对捕捞死亡率(F/k)、捕捞强度(F/M)和开发率(E),并评估其资源状况(相对现存生物
【机 构】
：
上海海洋大学 海洋科学学院,上海 201306;中国水产科学研究院南海水产研究所 广东省渔业生态环境重点实验室/农业农村部外海渔业开发重点实验室,广东 广州 510300;中国水产科学研究院南海水产研
论文部分内容阅读
带鱼是南海西北部北部湾主要经济鱼类种群之一,估算其种群参数和评估其资源状况对北部湾渔业资源管理具有重要意义.本文利用2006-2016年北部湾带鱼(Trichiurus haumela)的生物学数据,通过长度贝叶斯生物量估算法(Length-based Bayesian Biomass Estimation Method,LBB)估算带鱼的渐近肛长(Linf)、最适开捕肛长(Lc_opt)、相对自然死亡率(M/k)、相对捕捞死亡率(F/k)、捕捞强度(F/M)和开发率(E),并评估其资源状况(相对现存生物量,B/B0).带鱼的Linf为44.4 cm,Lc_opt均值为28.5 cm,M/k和F/k均值分别为1.32、2.76,F/M为2.20,E为0.67,B/B0均值为0.16.经逻辑斯蒂曲线拟合,带鱼的平均最小性成熟肛长为28.63 cm.研究表明,当前北部湾带鱼处于过度开发的状态,现存资源量较低,群体结构简单,呈小型化.
其他文献
Coherent vibrational dynamics can be observed in atomically precise gold nanoclusters using femtosec-ond time-resolved pump-probe spectroscopy.It can not only reveal the coupling between electrons and vibrations,but also reflect the mechanical and elec-tr
We propose a method for calculating the non-radiative decay rates for polyatomic molecules in-cluding anharmonic ef-fects of the potential en-ergy surface(PES)in the Franck-Condon re-gion.The method com-bines the n-mode repre-sentation method to construct
Mixed halide perovskites(MHPs)are a class of semiconductor materials with great promise for many optoelectronic applica-tions due to their outstanding photophys-ical properties.Understanding and tailor-ing the photogenerated carrier dynamics is essential
The intermolecular interaction determines the photo-physical properties of the organic aggregates,which are critical to the performance of organic photo-voltaics.Here,excitonic coupling,an important inter-molecular interaction in organic aggregates,betwee
The generalized quantum master equation(GQME)pro-vides a general and exact approach for simulating the re-duced dynamics in open quantum systems where a quan-tum system is embedded in a quantum environment.Dy-namics of open quantum systems is important in
After binding to human serum albumin,biliru-bin could undergo photo-isomerization and photo-induced cyclization pro-cess.The latter process would result the forma-tion of a product,named as lumirubin.These photo induced behaviors are the fundamental of cl
LASP(large-scale atomistic simulation with neural network potential)software developed by our group since 2018 is a powerful platform(www.lasphub.com)for performing atomic simulation of complex materi-als.The software integrates the neural network(NN)pote
Owing to the unique structural,electronic,and physico-chemical properties,molybdenum clusters are expected to play an impor-tant role in future nanotechnolo-gies.However,their ground states are still under debate.In this study,the crystal structure analys
Consistency between density func-tional theory calculations and X-ray photoelectron spectroscopy measure-ments confirms our predications on the undercoordination-induced local bond relaxation and core level shift of alkali metal,which determine the surfac
渤海、黄海是高产二甲基硫(Dimethyl Sulfide,DMS)的大陆架海区.该海区DMS的现场调查研究有助于准确评估海洋DMS释放量及其对全球气候变化的负反馈作用.目前,无论是基于模型还是直接测量法的通量估算均以表层海水或低层大气DMS浓度为基础,因此,先进的检测技术对其通量估算的准确度具有决定性作用.气相色谱法、质谱法、化学发光法以及卫星遥感技术是现在常用的观测技术,而本文则基于苯辅助光电离离子迁移谱技术进一步提出了一种可在海域现场观测海水中DMS的方法.通过结合动态气提-Nafion管在线除水进