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1.
Phyllosoma larvae collected to date in Japanese and Taiwanese waters have been classified into two genera (Linuparus, Panulirus) of the Palinuridae, four genera (Ibacus, Parribacus, Scyllarides, Scyllarus) of the Scyllaridae, and one genus (Palinurellus) of the Synaxidae. However, phyllosoma larvae of three Scyllarus species (S. bicuspidatus, S. cultrifer, S. kitanoviriosus) are absolutely dominant among the larvae collected in the waters. Scyllarus larvae are abundant in coastal waters while those of Panulirus are often collected in offshore/oceanic waters. Based on previous and ongoing studies dealing with spatial distributions
of phyllosoma larvae in Japanese and Taiwanese waters, it appears that phyllosoma and nisto larvae of the Scyllarus are retained within coastal waters north of the Kuroshio Current. On the other hand, the life history of the Panulirus (particularly P. japonicus) may be completed within the Kuroshio Subgyre: their phyllosoma larvae may be flushed out from coastal waters into the Kuroshio,
then transported through the Counter Current south of the Kuroshio into the water east of Ryukyu Archipelago and Taiwan where
they attain the subfinal/final phyllosoma or puerulus stages, once again entering the Kuroshio and dispersing into coastal
waters.
This revised version was published online in July 2006 with corrections to the Cover Date.
An erratum to this article is available at . 相似文献
2.
Wang Chunsheng He Dehu Liu Hongbin Yang Guanming Miao Yutian Yu Honghua 《海洋学报(英文版)》1996,15(2):231-249
ＤｉｓｔｒｉｂｕｔｉｏｎｏｆｚｏｏｐｌａｎｋｔｏｎｂｉｏｍａｓｓｉｎｔｈｅｓｏｕｔｈｅａｓｔｅｒｎＥａｓｔＣｈｉｎａＳｅａ￥ＷａｎｇＣｈｕｎｓｈｅｎｇ；ＨｅＤｅｈｕａ；ＬｉｕＨｏｎｇｂｉｎ；ＹａｎｇＧｕａｎｍｉｎｇ；ＭｉａｏＹｕｔｉａｎａｎｄＹｕＨｏ... 相似文献
3.
黄海中南部近岸海域春季鱼类浮游生物群落空间格局研究 总被引：6，自引：1，他引：5
根据2015年春季在黄海中南部近岸海域进行的鱼类浮游生物大型浮游生物网水平拖网数据,采用生态多样性指数和多元统计分析等方法,研究了该海域鱼类浮游生物的种类组成和群落空间格局及其与环境因子的关系。结果表明,本次调查共采集到鱼类浮游生物35种,其中鱼卵21种,仔稚鱼23种。鱼类浮游生物隶属于8目18科34属,优势种为鳀（Engraulis japonicus）、鲬（Platycephalus indicus）、鱼衔属（Callionymus spp.）和小黄鱼（Pseudosciaena polyactis）。其中,鳀和鱼衔属主要分布于海州湾渔场海域,鲬主要分布于吕泗渔场海域,小黄鱼多分布于吕泗渔场北部海域。生态类型包括半咸水型、沿岸型和近海型种类。聚类分析表明,鱼类浮游生物群落可划分为以鱼衔属、鳀为优势种的站位组A（主要分布于海州湾海域）、以小黄鱼、黄鲫（Setipinna taty）等为优势种的站位组B（主要位于江苏沿岸海域）和以鲬为优势种的站位组C（主要位于江苏沿岸-近海海域）,以站位组B的群落物种多样性指数和均匀度指数最高。各站位组的鱼类浮游生物的生态类型和适温类型组成不同,这与其所处的海域生境有关。典范对应分析（CCA）表明,影响春季黄海中南部鱼类浮游生物群落空间结构的主要环境因子为水深和表层温度。同时也受洋流、底质类型等多种因素的综合影响。研究结果初步揭示了黄海中南部近岸海域鱼类浮游生物群落的空间格局,可为今后科学制定该海域水产种质资源保护区、资源量化管理等资源养护管理措施提供科学依据与技术支撑。 相似文献
4.
Monsoon-driven succession of the larval fish assemblage in the East China Sea shelf waters off northern Taiwan 总被引：2，自引：0，他引：2
Hung-Yen Hsieh Wen-Tseng Lo Long-Jing Wu Dong-Chung Liu Wei-Cheng Su 《Journal of Oceanography》2011,67(2):159-172
The seasonal variation in the larval fish community related to the hydrography in the East China Sea (ECS) off northern Taiwan
was studied from February to November 2004. Hydrographic conditions in the southern ECS are strongly influenced by the different
water masses due to the seasonal monsoon system. A total of 173 taxa of larval fish belonging to 68 families and 105 genera
were identified during the study period. The highest abundance of larval fish was recorded in winter, a moderate abundance
was seen in late spring and summer, and the lowest abundance in autumn. Significantly higher abundances were usually found
in the mixing zone than in ECS and the Kuroshio Current, and the number of species of larval fish was greater during the warm
period than during the cold period. The larval fish fauna in the southern ECS is a mixture of endemic and exotic species;
the latter come from the coastal waters of mainland China when the northeasterly monsoon prevails, from the South China Sea
during the southwesterly monsoon, and from the Kuroshio waters year-round. The succession of water masses induced by the monsoon
systems and the high nutrient levels caused by frontal turbulence and topographic upwelling may determine the distributions
of larval fish in terms of abundance and composition. 相似文献
5.
Jin Yeong Kim Il Su Choi Joo Il Kim Seok Gwan Choi Young Yull Chun 《Ocean Science Journal》2007,42(1):41-48
We investigated the temperature and salinity effects on the major fish species in the wintering grounds based on trawl surveys
and oceanographic observations in the southwestern waters of Korea during March-early April in 2002-2003. The influence area
of warm Kuroshio water was limited to the southwestern area of Korea in 2003 with a range of 7.7-16.3°C, 32.54-34.70 of salinity,
wider than that of 2002. The number of fish species and density of major fish species in 2003 were higher than in 2002. Geographical
estimation showed high proportions of species number and catches in the areas around Jeju Islands, southwestern waters and
the southeastern coast of Korea. Five species; silver pomfret (Pampus echinogaster), hairtail (Trichiurus lepturus), anchovy (Engraulis japonicus), small yellow croaker (Larimichthys polyactis) and yellow goosefish (Lophius litulon) were most abundant, composing above 60% of the total catch in 2002 and 2003. More than 50% of catch in the major fish species
were mostly distributed in the range of 9.5-11.0°C of temperature and 33.1-33.9 of salinity. Non-parametric estimation for
the major species showed the 1st mode around 10°C and the 2nd mode at 8-9°C in 2002 and 11-14°C in 2003. A m o n g major fish
species, hairtail was principally composed of juveniles, and larger individuals were caught in southeastern waters. These
results are considered to be helpful for the areabased fishery management strategy for the wintering grounds of the Yellow
Sea and coastal waters of Korea. 相似文献
6.
东北大西洋北海渔场鱼类群落结构年际变化研究 总被引：2，自引：1，他引：1
根据2001-2015年东北大西洋北海渔场进行的国际底拖网调查渔获数据，采用生物多样性指数和多元统计分析研究该海域群落结构的年际变化，并利用格局转变贯序t检验的方法研究鱼类种群的转变规律，结合环境因素与捕捞因素分析群落结构变化的原因。结果显示:2001-2015年北海渔场共出现280种渔业资源，其中鱼类有222种，资源丰度波动较大；物种多样性整体呈上升趋势。聚类分析和非度量多维标度排序分析表明，研究期间大致分为2001-2003年、2004-2011年和2012-2015年3个阶段。大西洋鲱分别在2004年和2014年种群结构发生格局转变，格局转变指数（RSI）分别为-0.45和0.41；黑线鳕在2003年和2012年格局发生转变，RSI值分别为-0.58和-0.66；黍鲱在2014年格局发生转变，RSI值为2。通过对环境因素与捕捞因素的分析发现，北海渔场群落格局第一次发生转变主要受捕捞因素影响，第二次发生转变主要受环境因素影响。 相似文献
7.
Yoshiro Watanabe Yutaka Kurita Masayuki Noto Yoshioki Oozeki Daiji Kitagawa 《Journal of Oceanography》2003,59(4):403-414
Growth and mortality rates of larval and early juvenile Pacific saury Cololabis saira were estimated for spring and autumn spawning seasons in the Kuroshio-Oyashio transitional waters and for winter spawning
season in the Kuroshio waters in 9 years from 1990–1998, based on quantitative fish sampling and otolith daily ring readings.
Growth and mortality rates were more variable in the Kuroshio-Oyashio transitional waters than in the Kuroshio waters. The
estimated production of 40-mm preschooling juveniles was a positive function of larval production in the hatching length class
(5.9–9.9 mm) in the Kuroshio waters. In the Kuroshio-Oyashio transitional waters, rather than larval production in the hatching
length class, cumulative survival through the larval and early juvenile stages determined the juvenile production. Variable
growth and survival rates of saury observed in the transitional waters seem to be associated with large environmental variability
in the waters, including shifts of the Kuroshio and Oyashio fronts and development of streamers and eddies between the fronts.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
8.
K Elhasni P Vasconcelos K Dhieb H El Lakhrach M Ghorbel O Jarboui 《African Journal of Marine Science》2017,39(1):69-82
The banded murex Hexaplex trunculus and purple dye murex Bolinus brandaris are frequently caught as bycatch by bottom trawlers operating in the Gulf of Gabès, southern Tunisia. Although these muricid gastropods might importantly constitute an additional source of income for fishermen as well as help to diversify local shellfish production, information on their catches is relatively scarce. Hence, the present study aimed to assess the status of local populations of H. trunculus and B. brandaris, including data on their spatial and depth distributions, abundance, biomass, population structure and mortality. Fishing surveys using bottom trawls were performed between May 2006 and June 2007 in offshore areas of the Gulf of Gabès. In total, 198 fishing hauls were analysed, corresponding to a total fishing duration of 333.3 hours and a total prospecting area of 1 534 ha at depths of 20–86 m. Altogether, 3 026 H. trunculus and 3 599 B. brandaris of a broad size range (22.9?91.1 and 22.4?97.0 mm shell length, respectively) were sampled during the study period. GIS-produced maps were employed to determine the species’ spatial and bathymetric distributions by extrapolating their estimated fishing yield (bycatch per unit effort), abundance, biomass and mortality in relation to the total area surveyed in the gulf. The results provide valuable baseline information that may be applied to management proposals for regulating this untargeted resource, ultimately assisting sustainable exploitation and long-term preservation of this alternative fishing resource in the offshore areas of the Gulf of Gabès. 相似文献
9.
西北太平洋环境变化对柔鱼冬春生群体资源丰度年间变化的影响 总被引：5，自引：0，他引：5
The neon flying squid Ommastrephes bartramii is an economically important species in the Northwest Pacific Ocean. The life cycle of O. bartramii is highly susceptible to climatic and oceanic factors. In this study, we have examined the impacts of climate variability and local biophysical environments on the interannual variability of the abundance of the western winter-spring cohort of O. bartramii over the period of 1995–2011. The results showed that the squid had experienced alternant positive and negative Pacific Decadal Oscillation(PDO) over the past 17 years during which five El Ni?o and eight La Ni?a events occurred. The catch per unit effort(CPUE) was positively correlated with the PDO index(PDOI) at a one-year time lag. An abnormally warm temperature during the La Ni?a years over the positive PDO phase provided favorable oceanographic conditions for the habitats of O.bartramii, whereas a lower temperature on the fishing ground during the El Ni?o years over the negative PDO phase generally corresponded to a low CPUE. The same correlation was also found between CPUE and Chl a concentration anomaly. A possible explanation was proposed that the CPUE was likely related to the climateinduced variability of the large-scale circulation in the Northwest Pacific Ocean: high squid abundance often occurred in a year with a significant northward meander of the Kuroshio Current. The Kuroshio Current advected the warmer and food-rich waters into the fishing ground, and multiple meso-scale eddies arising from current instability enhanced the food retention on the fishing ground, all of which were favorable for the life stage development of the western squid stocks. Our results help better understand the potential process that the climatic and oceanographic factors affect the abundance of the winter-spring cohort of O. bartramii in the Northwest Pacific Ocean. 相似文献
10.
To understand the importance of picoeukaryotes in the biogeochemical cycle in the subtropical Kuroshio Current, a year-round survey of the hydrography and the distribution of picoeukaryotes were conducted in four oceanographic cruises from October 2012 to July 2013. In comparison with other seasons, the highest abundancy of photosynthetic picoeukaryotes, with concentrations >104 cells/ml, was observed around the eastern boundary of the Kuroshio in the winter. Accordingly, the composition of picoeukaryotes in this cold season was further studied by a metabarcoding analysis of the 18S rRNA gene. The majority of picoeukaryotes comprised Alveolata, followed by Haptophyta and Stramenopiles. Their composition was diverse in the waters affected by the Kuroshio and in the offshore province. For Haptophyta, in contrast to clade A prevailing in the Kuroshio waters, clade B1, which was considered the host of uncultivated diazotrophic cyanobacterium group A (UCYN-A), appeared only in the offshore area. Similarly, in Stramenopiles, Pseudo-nitzschia spp. and MAST-1D, respectively, dominated in the Kuroshio-influenced and offshore areas. While Alveolata was the most abundant group, the distributions of all lineages were similar. The association between picoeukaryote succession and hydrographic change is yet to be fully understood. Our results will assist future studies on the community composition of picoplankton and their relationship with marine ecology in the region. 相似文献
11.
Lagrangian fronts (LFs) in the ocean are defined as boundaries between surface waters with strongly different Lagrangian properties. They can be accurately detected in a given velocity field by computing synoptic maps for displacements of synthetic tracers and other Lagrangian indicators. We use Pacific saury catch and location data for a number of commercial fishery seasons in the region of the northwest Pacific with one of the richest fishery in the world. It is shown statistically that the saury fishing grounds with maximal catches are not randomly distributed over the region but located mainly along the sharp LFs where productive cold waters of the Oyashio Current, warmer waters of the southern branch of the Soya Current, and waters of warm-core Kuroshio rings converge. Computation of those fronts in altimetric geostrophic velocity fields both in the years with the First and Second Oyashio Intrusions shows that in spite of different oceanographic conditions LF locations may serve as good indicators of potential fishing grounds. Possible biophysical reasons for saury aggregation near sharp LFs are discussed. We propose a mechanism for effective export of nutrient rich waters based on stretching of material lines in the vicinity of hyperbolic objects in the ocean. The developed method, based on identifying LFs in any velocity fields, is quite general and may be applied to find potential fishing grounds for the other pelagic fish. 相似文献
12.
Using ichthyoplankton samples collected in the Kuroshio Subgyre during early summer cruises, we examined spatial distributions
of scyllarid phyllosoma larvae in the Subgyre, particularly of the genus Scyllarus. The present study has two objectives: (1) to reveal species composition of Scyllarus phyllosoma larvae in the Kuroshio Subgyre, and (2) to examine larval recruitment of Scyllarus species as contrasted with that of Panulirus, particularly P. japonicus, the larval recruitment of which has been examined in detail. A total of 218 phyllosoma larvae collected in the present study
belonged to two families (Palinuridae and Scyllaridae) representing 5 genera and 11 species. Phyllosoma larvae of two Scyllarus species (S. cultrifer and Scyllarus sp. c) were abundant among the collected larvae, and were found mainly in the following three regions located within the
Kuroshio-Counter Current region south of Kuroshio Current: the water east of Okinawa Is., the water far east of Okinawa Is.
(or far south of Shikoku Is.), and the water around Hachijojima Is. Larvae of each of the above two Scyllarus species collected in the three regions may belong to different populations: larvae collected in the water around Hachijojima
Is. may come from their benthic populations along the Pacific coast of Honshu and Shikoku Is., central Japan, while larvae
collected in the other two regions may come from their benthic populations of the Ryukyu Archipelago and Taiwan. Judging from
their shorter larval period and current systems within the Kuroshio Subgyre, these Scyllarus larvae may be destined for death.
An erratum to this article is available at . 相似文献
13.
14.
日本鲭是一种重要的经济鱼类,广泛分布于西北太平洋沿岸海域,其资源和补充很容易受到环境因素的影响,尤其是在鱼类的早期生活阶段,即卵和幼体阶段。本文建立了一个基于个体的模型（Individual-Based Model,IBM）用以研究典型大弯曲期间黑潮主流、周围环流以及中尺度涡对日本鲭早期生命活动的影响。数值模拟及研究结果表明：（1）在深度分布方面,大部分个体（鱼卵或仔稚鱼）位于75 m以浅水层中,只有少部分被垂直湍流带入更深的水域。（2）在产卵场和育幼场之间的连通性方面,3-5月来自主要产卵场的个体随黑潮主流进入黑潮延伸区的渔场;6月份,主要产卵场中的个体受到黑潮大弯曲东侧的小型冷涡的影响,该冷涡阻止了其进入黑潮延伸区的渔场,并留在纪伊半岛和伊豆群岛的沿海水域。在昼夜垂直迁移（Diel Vertical Migration,DVM）这一输运方式的影响下,停留在四国岛和纪伊半岛附近的个体数量增加,处于DVM输运方式下的个体受冷涡的影响更大,增加了在海洋表面漂流的时间,无法跟随黑潮主流输送到更远的育幼场。（3）在输送距离方面,90%以内的个体进行短距离到中距离输运,在DVM输运方式下,长距... 相似文献
15.
Distribution, abundance, and habitat preferences of native fish were investigated down the length of a relatively pristine, medium‐sized, fourth‐order stream on Stewart Island, New Zealand. A limited fish fauna was recorded (six species), including three threatened large galaxiid species (Galaxias argenteus, Galaxias fasciatus, and Galaxias brevipinnis), which have restricted distributions on mainland New Zealand. Results indicated that these large galaxiids occupy diverse habitats including pools and backwaters within the mainstems of this stream. Their extensive distributions and wide habitat usage were attributed to factors such as the intact catchment vegetation, unmodified stream channel, and the absence of introduced fishes, particularly salmonids. Results suggest that some native species have been excluded from mainstem habitats elsewhere in New Zealand. It was also evident that interactions among the native species influenced habitat use; G. brevipinnis avoided backwaters, runs, and pools in reaches occupied by G. fasciatus and Anguilla dieffenbachii; whereas G. fasciatus appeared to avoid habitats occupied by G. argenteus and A dieffenbachii. Maximum densities and biomass of galaxiids and eels occurred in deepwater habitats (>0.75 m). Furthermore the fish inhabiting these deeper waters were larger and more likely to be female. These findings have significant implications for the design and application of sampling protocols for native New Zealand fishes and for the protection of their habitats. If deeper waters are not sampled then species, sex, and size biased data may result. 相似文献
16.
小黄鱼Larimichthys polyactis体长-体重关系幂指数与产卵群体空间分布相关性研究 总被引：1，自引：0，他引：1
鱼类产卵群体的相关研究一直是渔业领域关注的热点,对鱼类的产卵期、产卵场的研究是鱼类生态习性研究方向的重要组成部分。本文在前期研究证实鱼类体长-体重关系幂指数可以指示鱼类产卵期的基础上,利用2004年4个季节的东海大面积调查数据,尝试利用同一时间点上的各个调查点幂指数信息来分析鱼类产卵场分布特征,结果发现,成熟产卵个体仅在春季出现,而未成熟产卵个体4季均有分布,以此推测小黄鱼存在"跳过产卵"现象。另外发现,单靠幂指数大小,不能区分各个产卵成熟阶段,也不能区分产卵个体与非产卵个体;而怀卵个体出现站点的幂指数平均值偏低于匀速生长,空间上也具有类似特征,即幂指数相对低的地方一般对应怀卵个体相对集中的水域。本文依据幂指数分布,推断小黄鱼成熟产卵群体有3块相对集中水域,即舟山渔场近海、济州岛西南侧和江外与舟外渔场临近水域。 相似文献
17.
西北太平洋柔鱼渔场分布与涡动能变化的相关关系 总被引：1，自引：0，他引：1
本研究利用卫星高度计数据计算海洋涡动能(Eddy Kinetic Energy,EKE),根据2010–2016年中国远洋渔业协会鱿钓组提供的西北太平洋柔鱼(Ommastrephes bartramii)渔业生产数据,分析柔鱼渔场的EKE分布特征以及黑潮延伸体EKE的时空变化对柔鱼渔场分布的影响。结果显示,柔鱼渔场的EKE与单位捕捞努力量渔获量(Catch Per Unit Effort,CPUE)呈显著负相关(P <0.01),EKE对CPUE的有效影响范围为0~1 500 cm^2/s^2,最适宜EKE范围为25~150 cm^2/s^2。黑潮延伸体EKE强度由西向东递减,与CPUE年平均呈负相关,相关系数为0.81(P <0.05)。按黑潮延伸体经度范围分为4个子区域,CPUE月平均纬度重心响应该月EKE强度最高的子区域。盛渔期8–10月渔场距离黑潮延伸体在800~1 000 km范围内时,CPUE随距离增加而增大,其中最适宜的距离范围为850~950 km。研究表明,当黑潮延伸体路径弯曲多变时,EKE增大,而柔鱼CPUE变低,渔场位置越偏北。 相似文献
18.
基于个体模型的东海鲐鱼渔场形成机制研究 总被引：4，自引：2，他引：2
鲐鱼Scomber japonicus资源丰富,在我国近海渔业中占有重要地位。其渔场的形成受海洋环境的制约,本文确定鲐鱼运动和物理环境之间的响应关系,建立起了基于个体的东海鲐鱼生长洄游模型。结果显示,鲐鱼集群分布与捕捞生产渔场基本吻合,鲐鱼聚集主要受台湾暖流、大陆沿岸水、黑潮影响,往往集群在一定温度范围内并在冷暖交汇区温盐梯度大偏暖水一侧。在台湾暖流和沿岸水交汇的锋面附近、台湾暖流暖水舌前端、黑潮与中国大陆沿岸水形成的潮境区域均有大量的鲐鱼聚集,并形成渔场。产卵位置的变动使偏西产卵位置的鲐鱼由于受台湾暖流影响较大,鲐鱼会呈长带状大量聚集在台湾暖流和沿岸水的锋面附近,并使在台湾暖流暖水舌前端的聚集数量增多,而偏东的产卵的鲐鱼受黑潮影响较大,聚集分布范围较大,会使黑潮形成的锋面附近聚集数量增多,而使台湾暖水舌的前端的聚集量减少。正常产卵位置在生存率方面是最佳产卵位置。研究表明鲐鱼所处空间位置不同,会影响其集群的位置,用数值模型验证了物理环境会对鲐鱼的洄游和渔场的形成产生影响。 相似文献
19.
Joji Ishizaka Hiroshi Kiyosawa Kazunori Ishida Kimitoshi Ishikawa Masayuki Takahashi 《Deep Sea Research Part I: Oceanographic Research Papers》1994,41(11-12)
The meridional distribution of autotrophic picoplankton groups in the central north Pacific was studied during the late northern summer of 1990. Sampling was along a section at 175°N which extended from 45°N to 8°S. The section is far from coastal regions and included subarctic, central gyre, and equatorial areas. Five autotrophic picoplankton groups, autotrophic microflagellate, red-fluorescing picoplankton,Synechococcus, prochlorophyte, and orange-fluorescing picoplankton, were identified from samples taken at stations distributed along this section. These five groups showed distinctive differences in their meridional and vertical distributions. The autotrophic microflagellates and red-fluorescing picoplankton showed distributions that were similar to that of chlorophyll a, which was dominated by the <3 μm size fraction. However, the vertical distribution of these groups was different.Synechococcus was found mostly in surface waters (PAR<10%) and was particularly abundant in the Kuroshio Extension and south of the equatorial region where the nitracline was shallow (50–75 m). Prochlorophytes were abundant in the deep euphotic layer (PAR 1-0.1%) from the south of the Kuroshio Extension to the south of the equatorial area. Orange-fluorescing picoplankton, which may be one kind of cyanobacteria but is larger than typical Synechococcus, were mostly distributed in the oligotrophic surface waters of the central gyre. The carbon biomass estimates for these organisms showed that these five groups dominated in different areas. The vertical distribution of carbon biomass did not correspond to that of chlorophyll a in the central gyre and south of the equator because of the larger carbon/ chlorophyll a ratio of Synechococcus and orange-fluorescing picoplankton relative to that of the other picoplankton. 相似文献
20.
不同环境因子权重对东海鲐鱼栖息地模型的影响研究 总被引：4，自引：1，他引：3
鲐鱼（Scomber japonicus）是栖息在西太平洋沿岸的中上层鱼类,了解其栖息地分布及其与海洋环境因子的关系有助于合理开发和管理该资源。本文根据2003-2011年7-9月中国东海鲐鱼的生产数据,采用正态分布函数分别构建海表面温度（sea surface temperature,SST）、海表温梯度（gradient of sea surface temperature,GSST）和海表面高度（sea surface height,SSH）与作业次数的适应性指数（suitability index,SI）,基于不同权重的算术平均法（arithmetic weighted model,AWM）分别建立栖息地指数（habitat suitability index,HSI）模型,并用2012年7-9月生产数据进行验证。结果显示,7、8、9月各月最佳HSI模型的SST、STG和SSH的权重分别为0.5、0.25、0.25,0.8、0.1、0.1和0、1.0、0,利用2012年7-9月生产数据与环境数据对各月份最佳权重HSI模型进行验证,在HSI>0.6的海域,7、8、9月各月作业次数比重和产量比重分别为85.87%和92.55%,76.74%和86.69%,51.83%和56.11%。研究表明,不同月份的环境因子对鲐鱼渔场分布的影响程度不同,本研究为更好地预测鲐鱼栖息地奠定了基础。 相似文献