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Risk of stock extinction in two species of kilkas (Clupeonella engrauliformis and C. grimmi) from the Caspian Sea 里海两种狐獴种群灭绝的危险(细纹革耳虫和格里米狐獴)
Pub Date : 2020-03-25 DOI: 10.22034/IJI.V7I1.371
H. Fazli, A. Janbaz, K. Khedmati
The present study aimed to update and describe the current stock status and to provide quantitative methods for assessing vulnerability extinction of two main pelagic species i.e. Clupeonella engrauliformis and C. grimmi in Iranian waters of the Caspian Sea during 1995-2017. The biomass of C. engrauliformis and C. grimmi were collapsed from more than 180,000 and 47,000 mt in 1996 to 520 and 448 mt in 2017, respectively. The proportional rate of population mature biomass of C. engrauliformis and C. grimmi were declined from about 105,000 and 32,000 mt in 1998 to less than 490 and 440 mt in 2017, respectively. The generation length of both species was estimated five years. Base on IUCN criterion A, the proportional rates of population mature biomass of both kilka species show an exponential reduction and are Critically Endangered. The stocks of two kilka species are being shared among all bordering countries of the Caspian Sea. Therefore, it is suggested a coordinated regional effort between surrounding countries of the Caspian Sea to perform a proper management of kilka fishes’ resources.
本研究旨在更新和描述目前的种群状况,并提供定量方法来评估1995-2017年期间里海伊朗水域中两种主要中上层物种的脆弱性灭绝。Engraliformis和C.grimmi的生物量分别从1996年的180000和47000公吨下降到2017年的520和448公吨。C.englauliformis和C.grimmi种群成熟生物量的比例率分别从1998年的约105000和32000公吨下降到2017年的490和440公吨以下。这两个物种的世代长度估计为五年。根据国际自然保护联盟标准A,这两个kilka物种的种群成熟生物量比例呈指数级下降,属于极度濒危物种。里海所有沿岸国家都有两种kilka的种群。因此,建议在里海周边国家之间进行协调一致的区域努力,以对基尔卡鱼的资源进行适当的管理。
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引用次数: 4
Diet of juvenile Percichthys trucha (Teleostei: Percichthyidae) in Northern Patagonia: the importance of the littoral zone 北巴塔哥尼亚鲈鱼幼鱼的饮食:沿海地带的重要性
Pub Date : 2020-03-24 DOI: 10.22034/IJI.V7I1.445
M. V. Fernández, Fernando Elena, F. M. D. Oca, P. Macchi
The creole perch, Percichthys trucha is endemic to southern South America. The objective of this work was to identify the food groups of juvenile perch (up to one year old) in its natural environment, the Espejo Chico Lake. A total 99 individuals fromwere caught, measured and weighed, and their condition factor (K) was calculated. In the diet analyses, nine different groups (orders) were found in the stomach contents: Diplostraca, Cyclopoida, Amphipoda, Diptera, Coleoptera, Ephemeroptera, Plecoptera, Hymenoptera and Odonata. Food items showed no correlation with fish size (<29, 30-49, 50-69 and 70-89 mm). Diptera and amphipods inhabiting littoral areas were the main food items of the juveniles. We can suppose that the Creole perch prefer the littoral zone as a nursery; this obviates the need to migrate to the limnetic zone, since the littoral zone provides better food, stable physical habitats and refuge, and a higher concentration of dissolved oxygen than deeper zones, both for macroinvertebrates and perch.
克里奥尔鲈鱼是南美洲南部的特有种。这项工作的目的是确定埃斯佩霍奇科湖自然环境中幼年鲈鱼(一岁以下)的食物群。共有99人被捕获、测量和称重,并计算了他们的条件因子(K)。在饮食分析中,在胃内容物中发现了九个不同的组(目):双足目、环足目、两栖目、直翅目、鞘翅目、蜉蝣目、丛翅目、膜翅目和蜻蜓目。食物项目与鱼的大小没有相关性(<29、30-49、50-69和70-89毫米)。栖息在沿海地区的双翅目和片脚类是幼鱼的主要食物。我们可以假设克里奥尔鲈鱼更喜欢把沿海地区作为苗圃;这就避免了迁移到湖泊地带的需要,因为沿海地带为大型无脊椎动物和鲈鱼提供了比更深的地区更好的食物、稳定的物理栖息地和避难所,以及更高的溶解氧浓度。
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引用次数: 2
Review of the East Asian minnows of Iran (Family Xenocyprididae) 伊朗东亚鲦鱼(异鲤科)研究概况
Pub Date : 2020-03-22 DOI: 10.22034/IJI.V7I1.451
B. Coad
The systematics, morphology, distribution, biology and economic importance of the East Asian minnows of Iran are described, the species are illustrated, and a bibliography on these fishes in Iran is provided. There are five species, all exotics, in the genera Ctenopharyngodon (1 species), Hemiculter (1), Hypophthalmichthys (2) and Mylopharyngodon (1), variably introduced throughout Iran for fish farming and, in the case of Hemiculter , accidentally.
本文描述了伊朗东亚鲦鱼的系统分类、形态、分布、生物学和经济重要性,对其种类进行了说明,并提供了伊朗东亚鲦鱼的参考书目。Ctenopharyngodon属(1种)、Hemiculter属(1种)、Hypophthalmichthys属(2种)和Mylopharyngodon属(1种)共有5种,都是外来物种,它们在伊朗各地因养鱼而被引入,而Hemiculter属则是偶然引入的。
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引用次数: 2
Seminemacheilus dursunavsari, a new nemachelid species (Teleostei: Nemacheilidae) from Turkey 杜尔苏纳夫萨里半线虫,一个来自土耳其的线虫新种(Teleosteri:线虫科)
Pub Date : 2020-03-22 DOI: 10.22034/IJI.V7I1.494
E. Çiçek
Seminemacheilus dursunavsari , new species, is described from the Goksu River drainage, Eastern Mediterranean Basin, Konya Province, Turkey. This species is distinguished from the other members of the genus by a combination of the following characters: having irregular molted dark black spots and blotches on flanks, lacking blotches and spots on dorsal faces of head and ventral part of body, possessing fused black spots at base of caudal fin, a saddle-like black spot on the dorsal-fin origin, and blunt snout. Seminemacheilus dursunavsari n. sp. is also diagnosed from S. lendlii , S. ispartensis and S. ahmeti by 13 fixed, diagnostic nucleotide substitutions in the mtDNA COI barcode region, and a K2P genetic distance of 5.8, 5.6 and 4.7%, respectively.
土耳其科尼亚省东地中海盆地Goksu河流域的Seminemachielus dursunavsari是一个新种。本种与本属其他成员的区别在于以下特征的组合:侧面有不规则的蜕皮深黑色斑点和斑点,头部背面和身体腹部没有斑点和斑点;尾鳍基部有融合的黑色斑点,背鳍起点有鞍状黑色斑点,吻部钝。通过mtDNA COI条形码区域中的13个固定的诊断性核苷酸取代,以及K2P遗传距离分别为5.8%、5.6%和4.7%,也从伦德利链霉菌(S.lendlii)、易巴特链霉菌(S.ispartensis)和阿赫梅蒂链霉菌(S.ahmeti。
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引用次数: 4
Mean Trophic Level and Fishing in Balance index of fisheries landings in the Persian Gulf and Oman Sea 波斯湾和阿曼海渔业登陆的平均营养水平和捕捞平衡指数
Pub Date : 2020-02-29 DOI: 10.22034/IJI.V6I4.340
S. Hashemi, Javad Ghasemza
This study examined the changes in Mean Trophic Level (MTL) and Fishing in Balance index (FiB) of the Iranian fisheries harvested from the Persian Gulf and Oman Sea during the period from 1997 to 2016. The MTL was initially increased significantly followed by a consistent decline for two decades (R=0.45, P <0.05). The MTL demonstrated a declining process that might be attributed to over exploitation of fish stocks. The FiB index also illustrated an intermittent process and positive values from 1998 to 2016, that could be related to the unbalanced condition in this ecosystem (R=0.92, P <0.05). The analysis and interpretation of the MTL and FiB patterns suggest that the fish stock s in the regional Iranian waters of the Persian Gulf and Oman Sea have been over-exploited, which might have been due to fishing down (FD) in this area. The results revealed that the fishery management strategies which were implemented during this period had not been appropriate and should be replaced with new policies and regulations based on the stock assessment, fishing effort, and other effective factors.
本研究调查了1997年至2016年期间从波斯湾和阿曼海捕捞的伊朗渔业的平均营养水平(MTL)和捕捞平衡指数(FiB)的变化。MTL最初显著增加,随后20年持续下降(R=0.45,P<0.05)。MTL表现出下降过程,可能归因于过度开发鱼类种群。FiB指数还显示了1998年至2016年的间歇性过程和正值,这可能与该生态系统的不平衡状况有关(R=0.92,P<0.05)。对MTL和FiB模式的分析和解释表明,伊朗波斯湾和阿曼海区域水域的鱼类资源被过度开发,这可能是由于在该地区的捕捞(FD)造成的。结果表明,在此期间实施的渔业管理战略并不适当,应根据种群评估、捕捞努力和其他有效因素,以新的政策和法规取代。
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引用次数: 1
Life history traits of the Caspian stellate tadpole-goby Benthophilus leobergius Berg, 1949 (Teleostei: Gobiidae) from the southeastern Caspian Sea, Iran 伊朗里海东南部里海星状蝌蚪虾虎鱼Benthophilus leobergius Berg,1949的生活史特征
Pub Date : 2020-02-25 DOI: 10.22034/IJI.V6I4.361
R. Patimar, Abdolsaleh Qaranjiki, A. Bahalkeh
The Caspian stellate tadpole-goby, Benthophilus leobergius is endemic to for the Caspian Sea. In Iranian waters of the Caspian Sea, however, little is known about its life history. To address this, life history characteristics were examined in 256 specimens collected from the southeastern Caspian Sea, northern part of the Miankaleh Wildlife Refuge. The maximum observed age was 2+ years for both sexes. The sex ratio of males to females was 1:1.70. Estimated length-weight relationship was TL=0.0088TW 3.289 for males, TL= 0.0099TW 3.191 for females, and TL=0.0086TW 3.270 for the combined sexes. Egg diameter ranged from 0.8 to 1.8 mm with the mean of 1.259±0.50 mm. Mean absolute and relative fecundities were 2117±1243 eggs/female, and 130±77 eggs·g -1 body weight, respectively. Absolute fecundity and egg diameter were found to increase significantly with increasing fish size, whereas relative fecundity decreased significantly with total body weight.
里海星状蝌蚪虾虎鱼是里海的特有物种。然而,在伊朗里海水域,人们对其生活史知之甚少。为了解决这一问题,对从米安卡莱野生动物保护区北部里海东南部采集的256个标本进行了生命史特征检查。观察到的最大年龄为2岁以上。男女性别比为1:1.70。估计的长重关系为:雄性TL=0.0088TW 3.289,雌性TL=0.0099TW 3.191,组合性别TL=0.0086TW 3.270。卵径0.8~1.8mm,平均1.259±0.50mm。平均绝对和相对繁殖力分别为2117±1243个卵/雌,130±77个卵·g-1体重。绝对繁殖力和卵径随着鱼体大小的增加而显著增加,而相对繁殖力随着总体重的增加而明显降低。
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引用次数: 2
Evaluation of different water exchange regimes for optimizing growth and production of koi carp, Cyprinus carpio in tanks 优化池中鲤鱼生长和生产的不同水交换制度的评价
Pub Date : 2019-12-25 DOI: 10.22034/IJI.V6I4.402
P. Jha
The effect of different water exchange regimes on the growth and survival of koi carp, Cyprinus carpio in tanks provided with the supply of exogenous zooplankton as the food was investigated. Fish larvae (0.15±0.012g) were stocked in outdoor concrete tanks at 0.5 fish/l (T1 and T2); 1.0 fish/l (T3 and T4); and 1.5 fish/l (T5 and T6) and cultured for three months. The water exchange rate was 10% once daily in T1, T3 and T5 and twice daily in T2, T4 and T6. Values of dissolved oxygen were highest in T2, followed by T4, T1, T6, T3 and T5. The T5 treatment showed the highest concentrations of conductivity, NH 4 -N, NO 2 -N, NO 3 -N, PO 4 -P, and bicarbonate alkalinity, which were significantly higher than the other treatments. The final body weight of C. carpio ranged from 4.01 to 8.22g in the different treatments. At harvest, maximum weight gain was achieved in the T2, followed by T4, T1, T6, T3 and T5 in descending order. There was a significant difference in the survival of koi carp among the treatments, ranging from 56.43% (T5) to 96.32% (T2). The percentage and number of fish exceeding a total weight of 5g were estimated from the size-frequency distribution at the end of the study and was significantly higher in T6 ( P <0.05) than other treatments. From the present study, a daily water exchange of 20% could support higher stocking densities of koi carp in tanks and result in high productivity, measured in terms of the number of marketable fish.
研究了在以外源浮游动物为食物的池中,不同的水交换制度对鲤鱼生长和存活的影响。鱼苗(0.15±0.012g)以0.5鱼/升(T1和T2)的速度储存在室外混凝土罐中;1.0鱼/升(T3和T4);和1.5鱼/升(T5和T6),并培养三个月。T1、T3和T5每天一次,T2、T4和T6每天两次,水交换率为10%。溶解氧值在T2最高,其次是T4、T1、T6、T3和T5。T5处理的电导率、NH4-N、NO2-N、NO3-N、PO4-P和碳酸氢盐碱度最高,显著高于其他处理。在不同处理中,C.carpio的最终体重在4.01至8.22g之间。收获时,T2的体重增加幅度最大,依次为T4、T1、T6、T3和T5。鲤鱼的存活率在不同处理之间存在显著差异,从56.43%(T5)到96.32%(T2)。总重量超过5g的鱼的百分比和数量是根据研究结束时的大小频率分布估计的,T6组明显高于其他处理组(P<0.05)。根据目前的研究,每天20%的水交换量可以支持鲤鱼在水箱中更高的放养密度,并以可销售鱼类的数量衡量,从而提高生产力。
{"title":"Evaluation of different water exchange regimes for optimizing growth and production of koi carp, Cyprinus carpio in tanks","authors":"P. Jha","doi":"10.22034/IJI.V6I4.402","DOIUrl":"https://doi.org/10.22034/IJI.V6I4.402","url":null,"abstract":"The effect of different water exchange regimes on the growth and survival of koi carp, Cyprinus carpio in tanks provided with the supply of exogenous zooplankton as the food was investigated. Fish larvae (0.15±0.012g) were stocked in outdoor concrete tanks at 0.5 fish/l (T1 and T2); 1.0 fish/l (T3 and T4); and 1.5 fish/l (T5 and T6) and cultured for three months. The water exchange rate was 10% once daily in T1, T3 and T5 and twice daily in T2, T4 and T6. Values of dissolved oxygen were highest in T2, followed by T4, T1, T6, T3 and T5. The T5 treatment showed the highest concentrations of conductivity, NH 4 -N, NO 2 -N, NO 3 -N, PO 4 -P, and bicarbonate alkalinity, which were significantly higher than the other treatments. The final body weight of C. carpio ranged from 4.01 to 8.22g in the different treatments. At harvest, maximum weight gain was achieved in the T2, followed by T4, T1, T6, T3 and T5 in descending order. There was a significant difference in the survival of koi carp among the treatments, ranging from 56.43% (T5) to 96.32% (T2). The percentage and number of fish exceeding a total weight of 5g were estimated from the size-frequency distribution at the end of the study and was significantly higher in T6 ( P <0.05) than other treatments. From the present study, a daily water exchange of 20% could support higher stocking densities of koi carp in tanks and result in high productivity, measured in terms of the number of marketable fish.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"6 1","pages":"283-291"},"PeriodicalIF":0.0,"publicationDate":"2019-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46769000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Growth parameters and length-weight relationship of Heniochus acuminatus (Linnaeus, 1758) (Perciformes: Chaetodontidae) from the southeast coast of India 印度东南沿海尖锐黑尾猴(Linnaeus, 1758)(鳍形目:毛齿猴科)的生长参数和长重关系
Pub Date : 2019-12-25 DOI: 10.22034/IJI.V6I4.319
T. Manikandarajan, G. Mahadevan, Pazhanivel Bharadhirajan, M. Pouladi, R. Naderi
To study the growth parameters of long fin banner fish, Heniochus acuminatus , samples were monthly collected from the trawl catches of five major fish landing centers (Pondicherry, Cuddalore, Parangipettai, Karaikkal, and Nagapattinam) of the southeast coast of India during January to December 2015. A total of 475 longfin bannerfish (222 males and 253 females), ranging in size from 6.0-15.2cm for males and 5.6-15.7cm for females were collected. The total body weight of male and female were ranged from 11.06-25.34g and 10.90-27.15g, respectively. The b -value estimated for male (3.006) was greater than 3 (isometric) and for female (2.809) was less than 3 (slightly negative allometric). The correlation coefficient values (r) for male (0.984) and for female (0.995) was highly significant, with a high degree of the positive correlation between total body length and weight. The relative condition factor (K n ) values were found higher in females than males during various seasons. The asymptotic length L α values obtained using various methods for females ranged from 16.8 to 18.3cm (TL) and similarly, for males, it ranged from 16.77 and 176.4cm (TL). Most appropriate values of growth rate (K) for males and females were 1.20 yr -1 and 1.80 yr -1 , respectively. The estimated t 0 for males and females were -0.191 and -0.166, respectively. The growth parameters obtained during the present study will be used for stock assessment of this species.
为研究长鳍梭子鱼(Heniochus acuminatus)的生长参数,于2015年1 - 12月在印度东南沿海5个主要鱼类靠岸中心(Pondicherry、Cuddalore、Parangipettai、Karaikkal和Nagapattinam)每月采集拖网捕捞样本。共捕获长鳍旗鱼475条(公222条,母253条),雄体长6.0 ~ 15.2cm,雌体长5.6 ~ 15.7cm。公、母鱼总体重分别为11.06 ~ 25.34g和10.90 ~ 27.15g。男性的b值(3.006)大于3(等速),女性的b值(2.809)小于3(略负异速)。雄性和雌性的相关系数r分别为0.984和0.995,且体长与体重呈高度正相关。各季节雌虫的相对条件因子(K n)值均高于雄虫。不同方法测得的雌虫渐近长度L α值为16.8 ~ 18.3cm (TL),雄虫渐近长度L α值为16.77 ~ 176.4cm (TL)。雄性和雌性生长速率(K)的最适宜值分别为1.20和1.80 yr -1。男性和女性的估计t0分别为-0.191和-0.166。在本研究期间获得的生长参数将用于该物种的种群评估。
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引用次数: 2
Effects of diet containing wood betony, Stachys lavandulifolia extract on growth, gut microbiota and intestinal structure of the African cichlid, Sciaenochromis fryeri 日粮中含木槟榔、水草提取物对非洲慈鲷生长、肠道微生物群和肠道结构的影响
Pub Date : 2019-12-25 DOI: 10.22034/IJI.V6I4.304
Mahsa Mohammadi, F. P. Heyrati, S. Dorafshan
Four isocaloric diets were formulated to contain 0 (control), 2, 4 and 8% of wood betony (WB), Stachys lavandulifolia hydroalcoholic extract in a 56-days feeding trial on African cichlid, Sciaenochromis fryeri . The regression analysis of growth performance indices indicated that the best performance parameters including specific growth rate and weight gain were obtained in 3.9% WB in the diet. Total bacterial counts in the fish gut were reduced significantly from 20.50±4.22 (×10 3 Colony-Forming Unit; cfu g -1 ) in the control to 9.30±0.71, 3.60±0.98 and 3.10±0.80 (×10 3 cfu g -1 )  group of fish fed on 2, 4 and 8% WB, respectively ( P <0.05). No significant change was observed in the number of lactic acid bacteria and it was in the range of 0.80-1.30 (×10 3 cfu g -1 ). Evaluation of the mid-intestine morphology of fish fed on the graded levels of WB was done. Although fold and enterocyte heights were significantly increased in the fish fed on WB-enriched food in comparison to the control, the intestine diameters and microvilli lengths were not affected. This study indicated that hydroethanolic extract of WB can be considered as a supplement in fish diet to improve growth and some physiological aspects of the cichlid.
在对非洲慈鲷(Sciaenochromis fryeri)为期56天的饲养试验中,配制了4种等热量日粮,分别含有0(对照)、2、4和8%的木槟榔(WB)、水醇提取物。生长性能指标的回归分析表明,在3.9%WB的日粮中,获得了包括比生长率和增重在内的最佳性能参数。用2%WB、4%WB和8%WB喂养的鱼,其肠道细菌总数分别从对照组的20.50±4.22(×103菌落形成单位;cfu g-1)显著降低到9.30±0.71、3.60±0.98和3.10±0.80(×103 cfu g-1)(P<0.05)。对分级WB水平饲养的鱼类的中肠形态进行了评估。尽管与对照组相比,喂食富含WB的食物的鱼类的折叠和肠细胞高度显著增加,但肠道直径和微绒毛长度没有受到影响。本研究表明,WB的水乙醇提取物可以作为鱼类饮食中的一种补充剂,以改善慈鲷的生长和某些生理方面。
{"title":"Effects of diet containing wood betony, Stachys lavandulifolia extract on growth, gut microbiota and intestinal structure of the African cichlid, Sciaenochromis fryeri","authors":"Mahsa Mohammadi, F. P. Heyrati, S. Dorafshan","doi":"10.22034/IJI.V6I4.304","DOIUrl":"https://doi.org/10.22034/IJI.V6I4.304","url":null,"abstract":"Four isocaloric diets were formulated to contain 0 (control), 2, 4 and 8% of wood betony (WB), Stachys lavandulifolia hydroalcoholic extract in a 56-days feeding trial on African cichlid, Sciaenochromis fryeri . The regression analysis of growth performance indices indicated that the best performance parameters including specific growth rate and weight gain were obtained in 3.9% WB in the diet. Total bacterial counts in the fish gut were reduced significantly from 20.50±4.22 (×10 3 Colony-Forming Unit; cfu g -1 ) in the control to 9.30±0.71, 3.60±0.98 and 3.10±0.80 (×10 3 cfu g -1 )  group of fish fed on 2, 4 and 8% WB, respectively ( P <0.05). No significant change was observed in the number of lactic acid bacteria and it was in the range of 0.80-1.30 (×10 3 cfu g -1 ). Evaluation of the mid-intestine morphology of fish fed on the graded levels of WB was done. Although fold and enterocyte heights were significantly increased in the fish fed on WB-enriched food in comparison to the control, the intestine diameters and microvilli lengths were not affected. This study indicated that hydroethanolic extract of WB can be considered as a supplement in fish diet to improve growth and some physiological aspects of the cichlid.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"6 1","pages":"292-301"},"PeriodicalIF":0.0,"publicationDate":"2019-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49326419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Length-weight relationship and condition factor of eight species of the genera Capoeta, Garra, Chondrostoma, Schizothorax and Paraschistura from Iranian inland waters 伊朗内陆水域Capoeta属、Garra属、Chondrostoma属、Schizothorax属和Paraschistura属8种的长重关系和条件因子
Pub Date : 2019-12-25 DOI: 10.22034/IJI.V6I4.432
K. Abbasi, A. Mouludi-Saleh, S. Eagderi, A. Sarpanah
The length-weight relationship and condition factor of eight fish species from three basins in Iran were estimated. All specimens were captured from May 2010 to August 2017. Total length and total weight ranged 2.2-39.1cm and 0.14-656g, respectively. The b-value was calculated using W= a L b , which ranged from 2.53 ( Paraschistura turcmenica ) to 3.2 ( Garra rufa ), and condition factor was 0.89 ( P. turcmenica ) to 1.53 ( G. rossica ). This study provided LWR and condition factor of Chondrostoma cyri for the first time from Iranian inland waters.
对伊朗三个流域的八种鱼类的长重关系和条件因子进行了估算。所有标本均于2010年5月至2017年8月采集。总长度和总重量分别为2.2~39.1cm和0.14~656g。使用W=a L b计算b值,其范围为2.53(Paraschistura turcmenica)至3.2(Garra rufa),条件因子为0.89(P.turcmenika)至1.53(G.rossica)。本研究首次从伊朗内陆水域提供了细鳞软骨藻的LWR和条件因子。
{"title":"Length-weight relationship and condition factor of eight species of the genera Capoeta, Garra, Chondrostoma, Schizothorax and Paraschistura from Iranian inland waters","authors":"K. Abbasi, A. Mouludi-Saleh, S. Eagderi, A. Sarpanah","doi":"10.22034/IJI.V6I4.432","DOIUrl":"https://doi.org/10.22034/IJI.V6I4.432","url":null,"abstract":"The length-weight relationship and condition factor of eight fish species from three basins in Iran were estimated. All specimens were captured from May 2010 to August 2017. Total length and total weight ranged 2.2-39.1cm and 0.14-656g, respectively. The b-value was calculated using W= a L b , which ranged from 2.53 ( Paraschistura turcmenica ) to 3.2 ( Garra rufa ), and condition factor was 0.89 ( P. turcmenica ) to 1.53 ( G. rossica ). This study provided LWR and condition factor of Chondrostoma cyri for the first time from Iranian inland waters.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"6 1","pages":"26-270"},"PeriodicalIF":0.0,"publicationDate":"2019-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42243265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
期刊
Iranian Journal of Ichthyology
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