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.
{"title":"Risk of stock extinction in two species of kilkas (Clupeonella engrauliformis and C. grimmi) from the Caspian Sea","authors":"H. Fazli, A. Janbaz, K. Khedmati","doi":"10.22034/IJI.V7I1.371","DOIUrl":"https://doi.org/10.22034/IJI.V7I1.371","url":null,"abstract":"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.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"7 1","pages":"92-100"},"PeriodicalIF":0.0,"publicationDate":"2020-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43448635","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}
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.
{"title":"Diet of juvenile Percichthys trucha (Teleostei: Percichthyidae) in Northern Patagonia: the importance of the littoral zone","authors":"M. V. Fernández, Fernando Elena, F. M. D. Oca, P. Macchi","doi":"10.22034/IJI.V7I1.445","DOIUrl":"https://doi.org/10.22034/IJI.V7I1.445","url":null,"abstract":"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.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"7 1","pages":"78-84"},"PeriodicalIF":0.0,"publicationDate":"2020-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43688151","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}
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.
{"title":"Review of the East Asian minnows of Iran (Family Xenocyprididae)","authors":"B. Coad","doi":"10.22034/IJI.V7I1.451","DOIUrl":"https://doi.org/10.22034/IJI.V7I1.451","url":null,"abstract":"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.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"7 1","pages":"1-67"},"PeriodicalIF":0.0,"publicationDate":"2020-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43695036","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}
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.
{"title":"Seminemacheilus dursunavsari, a new nemachelid species (Teleostei: Nemacheilidae) from Turkey","authors":"E. Çiçek","doi":"10.22034/IJI.V7I1.494","DOIUrl":"https://doi.org/10.22034/IJI.V7I1.494","url":null,"abstract":"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.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"7 1","pages":"68-77"},"PeriodicalIF":0.0,"publicationDate":"2020-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44084162","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}
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.
{"title":"Mean Trophic Level and Fishing in Balance index of fisheries landings in the Persian Gulf and Oman Sea","authors":"S. Hashemi, Javad Ghasemza","doi":"10.22034/IJI.V6I4.340","DOIUrl":"https://doi.org/10.22034/IJI.V6I4.340","url":null,"abstract":"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.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"6 1","pages":"244-253"},"PeriodicalIF":0.0,"publicationDate":"2020-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45903238","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}
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.
{"title":"Life history traits of the Caspian stellate tadpole-goby Benthophilus leobergius Berg, 1949 (Teleostei: Gobiidae) from the southeastern Caspian Sea, Iran","authors":"R. Patimar, Abdolsaleh Qaranjiki, A. Bahalkeh","doi":"10.22034/IJI.V6I4.361","DOIUrl":"https://doi.org/10.22034/IJI.V6I4.361","url":null,"abstract":"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.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"6 1","pages":"254-263"},"PeriodicalIF":0.0,"publicationDate":"2020-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48326542","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}
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.
{"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}
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.
{"title":"Growth parameters and length-weight relationship of Heniochus acuminatus (Linnaeus, 1758) (Perciformes: Chaetodontidae) from the southeast coast of India","authors":"T. Manikandarajan, G. Mahadevan, Pazhanivel Bharadhirajan, M. Pouladi, R. Naderi","doi":"10.22034/IJI.V6I4.319","DOIUrl":"https://doi.org/10.22034/IJI.V6I4.319","url":null,"abstract":"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.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"6 1","pages":"271-282"},"PeriodicalIF":0.0,"publicationDate":"2019-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48478142","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}
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.
{"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}
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}
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