共查询到20条相似文献，搜索用时 125 毫秒
1.
丁鱥雌核发育鱼的异源精子诱导及其与亲本的RAPD比较分析 总被引：1，自引：0，他引：1
Gynogenesis is thought to be a useful method to generate fully inbred line and to initiate monosex culture in teleost fish. This article presents results of a study of gynogenesis of tench, Tinca tinca L. from Eltrix River of Xinjiang, China, induced by the common carp ( Cyprinus carpio ) sperm inactivated with UV irradiation. When cold shocking method was used to prevent exmasion of the second polar body in order to produce gynogenetic diploids, the optimum treated parameters were screened as cold shocking for 20min at 4℃, 5min after insemination. On this condition, 10.23% of the treated eggs survived at feeding stage. A comparative study between the gynogenesis and their parents was made by RAPD technique. 82 random primers of 10 nucleotide long sequence were used in RAPD analysis. The results showed that each primer gives 3- 12 fragments for each sample with the fragment length 330 - 2 460 bp, and the genetic similarity between gynogenesis and their mother was 97.4 %, while the genetic similarity between gynogenesis and their father was 27.4%, and there were no bands only shared by gynogenesis and their father, the common carp. It revealed that the chromosome of their father, the common carp, did not penetrate into the construction of gynogenetic tench. 相似文献
2.
Shunsuke Moriyama Kiyoko Yamaguchi Tomomi Takasawa Hiroaki Chiba Hiroshi Kawauchi 《Fish physiology and biochemistry》2006,32(3):189-201
In an attempt to understand growth regulation in the Japanese eel, Anguilla japonica, we cloned insulin-like growth factor-I (IGF-I) cDNAs and examined their mRNA expression in several tissues. Two eel IGF-I (eIGF-I) cDNAs encoding preprohormones, eIGF-I-Ea1and eIGF-I-Ea2, were cloned from the liver by polymerase chain reaction (PCR). The preproIGF-Is were identical in signal peptide and mature IGF-I, but different in the E domain—eIGF-I-Ea2 mRNA was 36 bp longer than eIGF-I-Ea1 mRNA. Eel IGF-I was 83–94% identical with that of teleosts, 71% identical with that of dogfish, 87% identical with that of bullfrog and chicken, and 83% identical with that of humans. In both males and females the highest eIGF-I-Ea1 mRNA levels were observed in the liver, with detectable levels also found in the gills, heart, stomach, spleen, kidney, intestine, swim-bladder, muscle, and gonads. eIGF-I-Ea1 mRNA levels in the liver were higher in females than in males whereas in the intestine they were lower than in males. eIGF-I-Ea2 mRNA was detected in all the tissues examined and at similar levels in males and females. In this experiment higher eIGF-I-Ea1 mRNA levels were observed in the liver of larger glass eels than in those of smaller fish. eIGF-I-Ea2 mRNA levels were also higher in larger eels, although they were lower than IGF-I-Ea1 mRNA levels. Both eIGF-I mRNA levels in liver were positively correlated with the body size of the␣glass eels. Intraperitoneal injection of recombinant eel GH (reGH), 0.25 μg g−1 body weight, into glass eels resulted in a significant increase in both eIGF-I mRNAs in the liver 1 day after injection compared with control fish, but no elevation was observed 2 days after injection. Incubation of liver slices with reGH at concentrations of 10, 100, and 1,000 ng mL−1 for 24 h resulted in a significant concentration-dependent increase in the levels of both eIGF-I mRNAs. Higher levels of eIGF-I-Ea1 and Ea2 mRNA were observed in the gills ofseawater-reared eels than in those of freshwater-reared fish, but no differenceswere observed in the whole kidney. These results suggest that IGF-I is involved in the regulation of somatic growth and also in adaptation of the Japanese eel to seawater. 相似文献
3.
The neon flying squid, Ommastrephes bartrami, is one of the most important jig fisheries in the northwest Pacific Ocean. In order to understand the movement of O. bartrami fishing-ground better and supply O. bartrami fishing-ground information for Chinese fishing boats in the northwest Pacific ocean, the fishing condition analysis and forecasting system of O. bartrami was developed successfully. The system was based on established comprehensive database, which included the catch data of O. bartrami (total yields, count of total fishing boats, fishing position etc. ) and oceanic environmental information (SST, SST gradient etc. ). Artificial intelligent technology about case-based reasoning was also combined with GIS component technology successfully in the system. The process and function of system establishment are composed of four parts: setting up of case database for central fishing-ground and its environmental factors, knowledge reasoning of fishery information, GIS visualization analyzing as well as trend forecasting of central fishing-ground and information production mapping. At last as an example of the results, an experimental central fishing-ground forecasting of O. bartrami from 9 to 15 in July 2002 in the northwest Pacific Ocean was given in the paper. The results showed that through three class similar searching forecasting central fishing-ground would move west, and indicating that forecasting of the system for O. bartrami central fishing-ground was correct by comparing to real fishing-ground from 16 to 22 in July 2002. Consequently, artificial intelligent expert system technology about case-based reasoning is a useful method for fishing condition and fishing-ground forecasting. 相似文献
4.
《海洋水产研究》2001,(4)
The research parts of the project operated by YSFRIYSFRI is involved in5 sub- projects of the“Bei Dou”Fisheries Research and Management Project,1997/1998- 2 0 0 0 .About2 0 scientists at YSFRI worked in the project.From the Norwegian side,the scientiststaking part in the work were Svein A. Iversen, ivind Strand,Einar Lied and Anders Aksnes. The Chineseand Norwegian scientists work together to achieve the objectives of the project.Monitoring survey for fisheries managementThe go… 相似文献
5.
草鱼加热过程中肌肉蛋白质的热变性 总被引：7，自引：0，他引：7
The variations of muscle tissus, peroxidase and Ca2^2 -ATPase activities and Vp (pasteurization value) were investigated with the fresh samples of grass carp ( Ctenopharyngodon idellus ) heated at different temperatures, thus revealing the mechanism of denaturation of muscle protein by heating. The experimental results showed the great difference in muscle tissue structure before and after the samples heated. In the initial stage of heating the water loss accounted for 50% of the total. When the samples were separately heated at 75, 85, and 95℃, fk values (dehydration curve slope) were 5, 4.1 and 1.7, respectively, while Vp reaching 40 minutes were 22, 8 and 5 min, respectively. As to the time for deactivation of peroxidase in the heated samples at the various temperatures, it varied from 38, 10 and to less than 6 min, respectively and the deactivation rates of Ca^2 -ATPase in 1 min were 50%, 88% and 100%, respectively. Consequently, the higher temperature the sample was heated, the faster rate of thermocon ductivity, the lower rate of water loss, and the faster rate of peroxidase deactivation it was. Also, the Vp for the least requirement of pasteurization ( Vp≥40min) was obtained. 相似文献
6.
《齐鲁渔业》2009,26(7):I0001-I0001
Study on the Variety of Protease Activity in the Digestive Tissues of Japanese Flounder Paralichthys olivaceus after Feeding
Abstract The activity ofprotease in the digestive tissue of Japanese flounder Paralichthys olivaceus was examined at different time after feeding. The activity of stomach protease increased gradually and get to highest value at the 3rd hour, then decreased while the activity of gut protease increased and reached to highest value at the 7th hour. 相似文献
Abstract The activity ofprotease in the digestive tissue of Japanese flounder Paralichthys olivaceus was examined at different time after feeding. The activity of stomach protease increased gradually and get to highest value at the 3rd hour, then decreased while the activity of gut protease increased and reached to highest value at the 7th hour. 相似文献
7.
Changes in the levels of plasma vitellogenin (Vg), estradiol (E2) and testosterone (T) were examined following gonadal development induced by carp gonadotropin treatment (cGTH) of freshwater
female yellow and silver eels (Anguilla anguilla L.). The animals received injections of cGTH (250 μg kg−1 body weight) or saline vehicle three times a week, for 6 to 8 weeks. No effect of vehicle was observed. Steroidogenic activity
of the ovary was stimulated by cGTH treatment as shown by the increase in circulating steroid levels in both stages. However,
the responses of T, E2 and Vg differed according to the stage of development of eels. At the yellow stage, the initial steroid plasma levels were
undetectable (< 0.01 ng ml−1) before treatment and ovarian steroidogenic activity was slightly stimulated following cGTH treatment; steroid levels reached
their highest values after 3 weeks and 6 weeks of treatment for E2 (0.62 ± 0.13 ng ml−1 and T (0.33 ± 0.30 ng ml−1), respectively. The cGTH treatment slightly increased plasma Vg levels (0.2–0.7 μg ml−1 during the experiment compared with the initial values of the group. At the silver stage, the initial steroid levels were
detectable (0.7 ng ml−1 for E2 and 0.1 ng ml−1 for T); cGTH treatment did not significantly increase plasma E2 level which remained at initial levels. Nevertheless, plasma T levels dramatically increased from 0.1 to 3 ng ml−1 and peaked after 1 or 2 weeks of cGTH treatment; a rapid increase in plasma Vg levels occurred, reaching its highest value
at 5 mg ml−1 after 3 weeks of treatment. Thus, the steroid kinetic profiles in relation to the appearance of Vg in the plasma following
cGTH treatment was closely related to androgen levels and there was a strong vitellogenic response induced by chronic cGTH
treatment. In order to test if androgens could be implicated in the vitellogenic response, we evaluated the potencies of various
androgens (testosterone and 5α-androstane-3β,17β-diol)in vivo andin vitro, associated with E2 to induce the production of Vg.In vitro experiments showed that Vg synthesis was induced by high doses (10−6 to 10−5 M) of androgen in the eel. Tamoxifen totally inhibited the action of androgens suggesting that androgens were acting through
binding to the E2 receptor.In vivo, androgens given alone at 50 μg kg−1 3 times a week for 1 months had no significant effect on plasma Vg levels. In addition, E2-androgen cotreatment showed that the presence of androgen did not modify the vitellogenic response induced by E2. 相似文献
8.
6种常用渔药对厚颌鲂鱼苗的急性毒性试验 总被引：3，自引：0，他引：3
The acute toxicity of the mixture of copper sulphate and ferrous sulphate （ratio 5： 2）, potassium permanganate （ KMnO4 ） , trichlorphon （ C4H8O4 C13P） , strong-chloride, bromochloropropene and formalin towards Larva of Megalobrama pellegrini was studied at by biological toxic test method at the water temperature of 29℃ to 30℃. The results showed that the median-lethal concentrations of 48h were 5.78,6.50,4.90,2.55,0. 042,120 mg/L, respectively; the safe concentrations were 0. 445,0. 528 、0. 268,0. 190,0. 003,7. 500mg/L, respectively. The larva of Megalobrama pellegrini is more sensitive than other fish, bromochloropropene can＇t be used. The drug dosage and time should be based on the specific situation circumstances in production. 相似文献
9.
《齐鲁渔业》2014,(9):I0001-I0001
Induction of Settlement and Metamorphosis of Sea Cucumber Apostichopus japonicus larvae by 5-HT Yang Ding-long et al. （ 1 ）
Abstract The larva Apostichopus japonicus individuals were exposed to solutions of 5-HT at different concentration. After induction, the rates of metamorphosis were then estimated. The results showed that 5-HT at the concentration 0.001, 0.01, 0.1, 1 mmol/L could increase the metamorphosis rate of sea cucumber larva after 12 h and 24 h induction. The optimum inductive effect of 5-HT was archived when the larva individuals were exposed in 0.1 mmol/L for 24 h, with the metamorphosis rate increment of 12.8 percentage. Key words 5-HT; sea cucumber larvae; metamorphosis; settlement 相似文献
Abstract The larva Apostichopus japonicus individuals were exposed to solutions of 5-HT at different concentration. After induction, the rates of metamorphosis were then estimated. The results showed that 5-HT at the concentration 0.001, 0.01, 0.1, 1 mmol/L could increase the metamorphosis rate of sea cucumber larva after 12 h and 24 h induction. The optimum inductive effect of 5-HT was archived when the larva individuals were exposed in 0.1 mmol/L for 24 h, with the metamorphosis rate increment of 12.8 percentage. Key words 5-HT; sea cucumber larvae; metamorphosis; settlement 相似文献
10.
Tilapia larvae were exposed to 0 (control), 50 (50-Cd) or 100 (100-Cd) μg l-1 cadmium for 4 days and then transferred to cadmium-free fresh water for 3 days of detoxification. Total length and weight,
calcium influx and total body calcium and cadmium content were examined at various times during detoxification. All the groups
grew normally with regards to total length and body weight. Within the first 12h of detoxification the 50- and 100-Cd exposed
groups released cadmium at the similar rate of about 24 ng mg-1 h-1 (or 140 ng larva-1 h-1). Later, however, this rate declined to only 4–16% of the initial level. Calcium influx in the control group showed a 10–26%
increase during the detoxification period. Calcium influx in the 50-Cd group increased by about 280% and reached it peak at
12h. Calcium influx in the 100-Cd group increased by 440% and did not peak until 24h after transfer. After peaking, the influxes
in both 50- and 100-Cd groups declined to the level of control at the end of the experiment. Calcium contents in 50- and 100-Cd
groups increased more rapidly than that in control group within first 24h of the detoxification period. However the rate of
increase in calcium content in three groups was the same after 24h. The changes in calcium influx appeared to be correlated
with those in calcium content, and these suggested that tilapia larvae regulate the mechanism of calcium balance to compensate
for the reduced calcium level in the body.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
11.
Heritability estimates for growth‐related traits in the Pacific oyster (Crassostrea gigas) using a molecular pedigree 
下载免费PDF全文
下载免费PDF全文 Pacific oyster is one of the leading species in world aquaculture, but heritability estimation applying mixed‐family approach has not been actively pursued. In this study, heritability for growth‐related traits in the Pacific oyster was first estimated by creating a single cohort of 45 families in a full‐factorial mating design consisting of nine sires and five dams. A total of 270 offspring were analysed and parentage assignment inferred by six microsatellite markers achieved 100% success. All parents contributed to the spawn and a total of 42 full‐sib families were represented. Using an animal model, heritability estimates at 12 months of age were 0.49 ± 0.25 for shell height, 0.36 ± 0.19 for shell length, 0.45 ± 0.23 for shell width and 0.35 ± 0.17 for wet weight. Genetic correlation between shell height and wet weight was quite high (0.79 ± 0.25), suggesting that direct selection of shell height, which is an easily measurable trait, also improves wet weight. The results obtained in this study indicate that growth‐related traits could be improved by exploiting additive genetic effects through selective breeding. 相似文献
12.
为了培育壳色性状优良且生长性状良好的长牡蛎(Crassostrea gigas)新品系,本研究以5个壳黑第四代家系和5个壳白第四代家系的成贝为基础群体,利用截头法对壳高进行选择,构建了壳黑和壳白快速生长系第一代群体,分析了两个选育群体的壳高和活体体重的选择反应、遗传获得和现实遗传力等遗传参数。结果表明,在长牡蛎收获的490日龄,壳黑群体和壳白群体选择组壳高较对照组壳高分别提高(9.83?1.68)%和(9.97?1.87)%,体重分别提高(10.16?3.64)%和(11.36?1.96)%。两选育群体壳高的平均现实遗传力分别为(0.353?0.09)和(0.405?0.111),体重的平均现实遗传力为(0.192?0.080)和(0.244?0.123)。本研究表明壳黑群体和壳白群体具有较大的遗传方差,在对壳高生长速度直接选择的同时实现了对活体体重的间接选育,可继续通过群体选育提高生长速度。本研究结果可以为培育出壳色美观、生长性状良好的长牡蛎优良品种提供科学依据。 相似文献
13.
长牡蛎壳金选育群体生长性状的选择效应 总被引：4，自引：1，他引：3
长牡蛎是一种世界性的养殖贝类,同时是我国最重要的经济贝类之一,壳色美观和快速生长是目前长牡蛎遗传育种的2个重要目标。2010年通过长牡蛎壳色性状的家系选育,获得了壳白、壳黑、壳金和壳紫4种壳色品系。实验以第二代壳金品系为基础群体,对长牡蛎壳金群体的生长性状进行定向选育,分析了长牡蛎壳金选育群体壳高性状的选择反应、遗传获得和现实遗传力。结果显示,养成阶段选择组的壳高均大于对照组,350日龄后表现出显著的生长优势;幼虫期,壳高性状的平均选择反应、遗传获得和现实遗传力分别为0.549±0.277、3.717%±2.611%和0.339±0.171,养成期分别为0.436±0.138、8.253%±1.014%和0.270±0.086。选择组的贝壳金黄色和外套膜金黄色比例分别提高了22%和10%。研究结果为长牡蛎壳金优良品系培育提供了重要基础资料。 相似文献
14.
本研究以长牡蛎(Crassostrea gigas)F1全同胞家系为作图群体,在已构建的基于120个微卫星和66个SNP标记的长牡蛎性别平均连锁图谱上,利用PROC QTL 2.0软件对出肉率和壳形(壳宽和壳深)性状进行QTL定位分析。结果表明,共检测到13个相关的QTL,分布在3个连锁群上;其中,与出肉率相关的4个QTL定位在1号和3号连锁群上(LG1和LG3),表型解释率为0.25%~47.53%;与壳宽相关的3个QTL定位在10号连锁群上(LG10),表型解释率为0.71%~45.39%;与壳深相关的6个QTL也定位在LG10,表型解释率为3.37%~24.78%。根据QTL连锁群分析和性状相关性分析结果可以推测,出肉率与糖原含量性状以及壳宽与壳深性状分别具有相近的遗传特征,利用与相关性状共同关联的分子标记可以同时对出肉率与糖原含量性状、壳宽与壳深性状进行遗传改良。本研究结果为今后长牡蛎相关性状候选基因克隆和分子标记辅助育种提供了参考。 相似文献
15.
Frouke Fey Norbert Dankers Josien Steenbergen Kees Goudswaard 《Aquaculture International》2010,18(1):45-59
Pacific oysters (Crassostrea gigas) were first observed in the Dutch Wadden Sea near Texel in 1983. The population increased slowly in the beginning but grew
exponentially from the mid-1990s onwards, although now some stabilisation seems to be occurring. They occur on a variety of
substrates such as mussel beds (Mytilus edulis), shell banks, dikes and poles. After initial settlement spat may fall on older individuals and congregate to dense clumps
and subsequently form reefs. Individual Pacific oysters grow 3–4 cm long in their first year and 2–3 cm in their second year.
Many mussel beds (Mytilus edulis) are slowly taken over by Pacific oysters, but there are also several reports of mussel spat settling on Pacific oyster reefs.
This might in the end result in combined reefs. Successful Pacific oyster spat fall seems to be related to high summer temperatures,
but also after mild summers much spat can be found on old (Pacific oyster) shells. Predation is of limited importance. Mortality
factors are unknown, but every now and then unexplained mass mortality occurs. The gradual spread of the Pacific oyster in
the Dutch Wadden Sea is documented in the first instance based on historical and anecdotal information. At the start of the
more in-depth investigation in 2002, Pacific oysters of all size classes were already present near Texel. Near Ameland the
development could be followed from the first observed settlement. On dense reefs each square metre may contain more than 500
adult Pacific oysters, weighing more than 100 kg per m2 fresh weight. 相似文献
16.
Abstract. Production of Pacific oysters was studied under pilot-scale conditions in Baynes Sound, British Columbia, using common bottom culture strategies. Four seeding treatments, each with a different seed per cultch density were cultured: wild-caught seed 5mm in shell height at 10 seed per cultch piece and hatchery produced seed 1-2 mm in shell height at densities of 11, 40 and 105 per cultch piece. The cultch material for all treatments was Pacific oyster shell. All seed was reared for approximately 1 year in a seed nursery located at the 2.2-m tidal level then transferred to a 1-m tidal level grow-out plot until harvest 4 years later in May 1988, Clusters of large numbers of oysters were separated and evenly distributed within the plots when the oysters attained a shell height of 60-100 mm. During the first year, growth was slow and mortalities were relatively high. All treatments produced oysters of similar size at harvest. The proportion surviving at harvest was substantially higher for the wild oysters which were initially larger at time of planting. Within the hatchery treatments proportional survival per cultch piece was inversely related to initial density on the shell; however, total production per cultch piece was positively related to initial density. Most efficient use of seed is attained at lower densities per shell; however, most efficient use of cultch and effort to handle cultch is attained at high densities. 相似文献
17.
2015年4月6日-10月26日,在桑沟湾海区现场研究了牡蛎壳粉缓释剂(Careshell)对魁蚶(Scapharca broughtonii)生长和存活的影响.按照缓释剂的重量比设置4个处理组,其中,魁蚶的初始体重均为160g/组,缓释剂的重量分别为0(对照组C0)、80 g(C1组)、160 g(C2组)和320 g(C3组).实验共进行200 d,每40 d测量各实验组魁蚶的生长参数(壳长、壳宽、壳高、湿重),计录死亡个体数,计算不同阶段(40 d间隔)魁蚶的特定生长率(SGR)及死亡率.结果显示,C3组魁蚶各生长参数显著高于C0组(P＜0.05),但与C1、C2组差异不显著(P＞0.05).经过200 d的养殖实验,C3组壳长、壳宽、壳高和湿重的特定生长率分别为(0.34±0.01)％/d、(0.46±0.02)％/d、(0.39±0.01)％/d、(1.11 ±0.002)％/d,均极显著高于C0组(P＜0.01),平均增加了17.9％、20.3％、18.1％、16.7％.C3组死亡率为(19.6±5.6)％,低于C0组的(26.1±2.5)％,但差异不显著(P＞0.05). 相似文献
18.
长牡蛎生长性状遗传力、遗传相关和表型相关分析 总被引：1，自引：1，他引：0
为了查清乳山(RS)和崆峒岛(KTD)海域长牡蛎生长性状各指标的遗传力、遗传相关和表型相关,本实验通过部分因子交配设计和人工授精的方法建立家系,并在乳山和崆峒岛海域进行养殖。用混合线性模型分别计算RS和KTD海域188日龄、338日龄和474日龄长牡蛎生长性状各指标的遗传参数。结果发现:不同日龄长牡蛎生长性状各指标,在乳山海域的遗传力是0.28~0.55,为中高遗传力,在崆峒岛海域的遗传力是0.34~0.63,为高遗传力;与乳山海域相比,崆峒岛海域各指标的遗传力偏高。运用亲本模型,将日龄和地点作为固定效应,计算得到壳高、壳长、壳宽和湿重的遗传力分别为0.25±0.08、0.29±0.09、0.14±0.05和0.26±0.09。不同海域、不同日龄的遗传相关和表型相关结果各不相同,但各指标间均呈现正相关;总体来讲,性状间的遗传相关大于表型相关。实验结果有助于掌握山东半岛南北两侧长牡蛎生长性状的数量遗传学参数,为制定长牡蛎在该海域的选育技术路线提供数据支持。 相似文献
19.
香港牡蛎营养丰富,味道鲜美,在上市前会通过集中育肥提高风味口感和经济价值。为探明不同育肥方式对香港牡蛎的育肥效果,对经过池塘育肥和外海育肥后香港牡蛎的壳高、壳长、壳宽、体质量、软体质量、出肉率、糖原含量、甜菜碱含量、蛋白含量等指标进行检测,并与内海对照组牡蛎进行比较分析。检测结果显示,经过池塘育肥,香港牡蛎的壳高、体质量、糖原含量和蛋白含量均显著升高( P <0.01),甜菜碱含量显著降低( P <0.01),壳长、壳宽、软体质量、出肉率无显著变化;经过外海育肥的香港牡蛎糖原含量显著升高( P <0.01),壳高、壳长、体质量、软体质量( P <0.01)和甜菜碱( P < 0.05 )含量显著降低,壳宽、出肉率和蛋白含量无显著变化。试验结果表明,池塘育肥比外海育肥效果要好;不论哪种育肥方式,育肥后牡蛎的糖原含量均显著升高,甜菜碱含量均显著降低,出肉率均无显著变化。 相似文献
20.
Jorge Chávez-Villalba María López-Tapia José Mazón-Suástegui & Miguel Robles-Mungaray 《Aquaculture Research》2005,36(14):1337-1344
This is the first evaluation of growth and survival of spat of the Cortez oyster Crassostrea corteziensis (Hertlein) produced under controlled conditions in a coastal area in the state of Sonora, Mexico for aquaculture purposes. A suspended culture technique, used for the Pacific oyster C. gigas, was used. The Cortez oyster has an isometric shell growth during the first 13 months, reaching 71.3±1.9 mm length, 52.6±1.3 mm thickness and 25.1±0.8 mm width. Allometric growth was found between total weight and length, thickness and width (survival was 70%). The relationships between particulate organic, inorganic material, chlorophyll a and environmental parameters with growth are described. Growth rates of C. corteziensis were affected by temperature with retardation at less than 18°C. For aquaculture purposes, it is recommended that spat be sowed after winter, and oyster harvest occur at the end of autumn. According to the von Bertalanffy equation, Cortez oysters would reach the traditional exploitation size of 65 mm (mean length) at harvest. Finally, the results of this study have shown that C. corteziensis is a good candidate for aquaculture projects in this region. 相似文献