M. Raja, R. Raja, C. Kamaraj, V. Balasubramanian, M. Kavitha, P. Perumal
Introduction of alien parasitic nematodes to the wild fish species might result in a severe threat to native species biodiversity including native fish species and native parasitic fauna. In the present study, the invasive Asian nematode, C amallanus cotti (Nematoda: Camallanidae), has been reported for the first time in Giant Danio ( Devario aequipinnatus ) in the Cauvery river systems of Southern part of Western Ghats, India. The occurrence of this parasite in both aquarium-cultured fish as well as from the natural aquatic bodies dwelling fish is evident of the introduction of the alien organisms due to insufficient prophylactic measures during the transmission of non-native hosts between countries and also the spread of them by the anthropogenic introduction to natural systems.
{"title":"The first report of an alien parasitic nematode, Camallanus cotti isolated from the wild Giant danio fish, Devario aequipinnatus, (Teleostei: Cyprinidae) from southern part of Western Ghats, India","authors":"M. Raja, R. Raja, C. Kamaraj, V. Balasubramanian, M. Kavitha, P. Perumal","doi":"10.22034/IJI.V5I3.282","DOIUrl":"https://doi.org/10.22034/IJI.V5I3.282","url":null,"abstract":"Introduction of alien parasitic nematodes to the wild fish species might result in a severe threat to native species biodiversity including native fish species and native parasitic fauna. In the present study, the invasive Asian nematode, C amallanus cotti (Nematoda: Camallanidae), has been reported for the first time in Giant Danio ( Devario aequipinnatus ) in the Cauvery river systems of Southern part of Western Ghats, India. The occurrence of this parasite in both aquarium-cultured fish as well as from the natural aquatic bodies dwelling fish is evident of the introduction of the alien organisms due to insufficient prophylactic measures during the transmission of non-native hosts between countries and also the spread of them by the anthropogenic introduction to natural systems.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"5 1","pages":"250-256"},"PeriodicalIF":0.0,"publicationDate":"2018-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49218922","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}
A. Mušović, Samir Đug, N. Pojskić, B. Stroil, A. Vesnić, R. Škrijelj
The Dalmatian barbelgudgeon, Aulopyge huegelii is a stenoendemic fish species restricted to the area of west Bosnia and part of Dalmatia. Its global IUCN species status is “endangered (EN)” according to the “B1ab (iii, v)” criterion. There are not enough reliable sources containing data on this species, particularly in the recent period. As primarily a groundwater fish, it was exceptionally well adapted to environmental conditions in the Busko Blato reservoir. Based on the recent findings, the status of this species has changed over the past several years. The main objective of this study was to characterise and determine the current status of the monotype species A. huegelii from the Busko Blato reservoir, through the analysis of its selected morphological and ecological features. During field research, we have gathered 88 individuals of A. huegelii , at just four neighbouring sites. A significant decrease in its population number is evident in comparison to previous studies. The results have shown its retreat into a small part of the reservoir which is connected with the groundwater system as its primary habitat, in order to escape from predators: the four new allochthone species in this ecosystem. Comparing the results with previous studies, it could be concluded that the Dalmatian barbelgudgeon is “returning” to its original morphological form i.e. groundwater fish form. All this could in perspective have significant consequences on the survival of the population of this species in the Busko Blato reservoir.
{"title":"Status of endangered fish species Aulopyge huegelii Heckel, 1843 (Teleostei: Cyprinidae) in the Buško Blato reservoir, Bosnia and Herzegovina","authors":"A. Mušović, Samir Đug, N. Pojskić, B. Stroil, A. Vesnić, R. Škrijelj","doi":"10.22034/IJI.V5I3.290","DOIUrl":"https://doi.org/10.22034/IJI.V5I3.290","url":null,"abstract":"The Dalmatian barbelgudgeon, Aulopyge huegelii is a stenoendemic fish species restricted to the area of west Bosnia and part of Dalmatia. Its global IUCN species status is “endangered (EN)” according to the “B1ab (iii, v)” criterion. There are not enough reliable sources containing data on this species, particularly in the recent period. As primarily a groundwater fish, it was exceptionally well adapted to environmental conditions in the Busko Blato reservoir. Based on the recent findings, the status of this species has changed over the past several years. The main objective of this study was to characterise and determine the current status of the monotype species A. huegelii from the Busko Blato reservoir, through the analysis of its selected morphological and ecological features. During field research, we have gathered 88 individuals of A. huegelii , at just four neighbouring sites. A significant decrease in its population number is evident in comparison to previous studies. The results have shown its retreat into a small part of the reservoir which is connected with the groundwater system as its primary habitat, in order to escape from predators: the four new allochthone species in this ecosystem. Comparing the results with previous studies, it could be concluded that the Dalmatian barbelgudgeon is “returning” to its original morphological form i.e. groundwater fish form. All this could in perspective have significant consequences on the survival of the population of this species in the Busko Blato reservoir.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"5 1","pages":"212-231"},"PeriodicalIF":0.0,"publicationDate":"2018-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48941432","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 present study provides a checklist of the family Blenniidae from intertidal habitats along the Iranian coasts of Persian Gulf and Makran Sea. This research carried out during the years 2013-2018 at nine stations (Dayyer, Haale, Bostanou, Bandar Lenge, Qeshm, Gataan, Jask, Gugsar and Chabahar) with almost rocky profile covering whole distribution range of the family. A total of 15 species including 11 species from collection sites and four species from previous works are listed here : Alticus kirkii, Antennablennius adenensis, A. bifilum, A. variopunctatus, Istiblennius edentulus, I. lineatus, I. pox, I. spilotus, Parablennius cornutus, P. opercularis, P. pilicornis and Scartella emarginata (subfamily Salariinae); Omobranchus fasciolatus, O. mekranensis and O. punctatus (subfamily Blenniinae). The most diverse genus is Istiblennius (four species, 26.6%) followed by Antennablennius, Parablennius and Omobranchus (each with three species, 20%), Alticus and Scartella (each with one species, 6.6%). All reported species, except the endemic Makran comb-tooth blenny, Omobranchus mekranensis , Vulnerable) are considered as Least Concern (LC).
{"title":"Comb-tooth blennies of the intertidal zones of Persian Gulf and Makran Sea: Morphology, taxonomy, distribution and conservation status (Blenniiformes: Blenniidae)","authors":"Hamidreza Mehraban, H. Esmaeili","doi":"10.22034/IJI.V5I3.295","DOIUrl":"https://doi.org/10.22034/IJI.V5I3.295","url":null,"abstract":"The present study provides a checklist of the family Blenniidae from intertidal habitats along the Iranian coasts of Persian Gulf and Makran Sea. This research carried out during the years 2013-2018 at nine stations (Dayyer, Haale, Bostanou, Bandar Lenge, Qeshm, Gataan, Jask, Gugsar and Chabahar) with almost rocky profile covering whole distribution range of the family. A total of 15 species including 11 species from collection sites and four species from previous works are listed here : Alticus kirkii, Antennablennius adenensis, A. bifilum, A. variopunctatus, Istiblennius edentulus, I. lineatus, I. pox, I. spilotus, Parablennius cornutus, P. opercularis, P. pilicornis and Scartella emarginata (subfamily Salariinae); Omobranchus fasciolatus, O. mekranensis and O. punctatus (subfamily Blenniinae). The most diverse genus is Istiblennius (four species, 26.6%) followed by Antennablennius, Parablennius and Omobranchus (each with three species, 20%), Alticus and Scartella (each with one species, 6.6%). All reported species, except the endemic Makran comb-tooth blenny, Omobranchus mekranensis , Vulnerable) are considered as Least Concern (LC).","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"5 1","pages":"192-211"},"PeriodicalIF":0.0,"publicationDate":"2018-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68013443","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 feeding characteristics of Aphanius isfahanensis in the Zayandeh River of Isfahan Province were studied by collecting 440 specimens (220 males and 220 females) from July 2016 to May 2017. The specimens were anesthetized in 1% clove oil, fixed in 10% buffered formalin and transferred to the laboratory. The average condition factor for males was 1.7, for female 1.26 and showed significant difference between different months in both sexes ( P <0.05). The average length and weight for all specimens were 38.57±5.24mm and 1.00±0.41g, respectively. The average length of gut (RLG) for all fish was 0.54±0.17 during the year. The mean RLG in different length classes showed significant differences ( P <0.05). The highest Gastrosomatic Index value was in July (0.05) and the lowest in August (0.03) and showed significant differences in different months ( P <0.05). A total of 181 empty stomachs were observed amongst the 440 fish and there were significant differences in different months ( P <0.05). Therefore, it can be concluded that this is a carnivorous fish (mainly aquatic insect larvae) with a modest feeding throughout the year.
{"title":"Feeding indices of Isfahan toothcarp (Aphanius isfahanensis) in Zayandeh River in Iran (Teleostei: Aphaniidae)","authors":"Z. Ghafoori, Y. Keivany, N. Soofiani","doi":"10.22034/IJI.V5I3.262","DOIUrl":"https://doi.org/10.22034/IJI.V5I3.262","url":null,"abstract":"The feeding characteristics of Aphanius isfahanensis in the Zayandeh River of Isfahan Province were studied by collecting 440 specimens (220 males and 220 females) from July 2016 to May 2017. The specimens were anesthetized in 1% clove oil, fixed in 10% buffered formalin and transferred to the laboratory. The average condition factor for males was 1.7, for female 1.26 and showed significant difference between different months in both sexes ( P <0.05). The average length and weight for all specimens were 38.57±5.24mm and 1.00±0.41g, respectively. The average length of gut (RLG) for all fish was 0.54±0.17 during the year. The mean RLG in different length classes showed significant differences ( P <0.05). The highest Gastrosomatic Index value was in July (0.05) and the lowest in August (0.03) and showed significant differences in different months ( P <0.05). A total of 181 empty stomachs were observed amongst the 440 fish and there were significant differences in different months ( P <0.05). Therefore, it can be concluded that this is a carnivorous fish (mainly aquatic insect larvae) with a modest feeding throughout the year.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"5 1","pages":"184-191"},"PeriodicalIF":0.0,"publicationDate":"2018-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42282629","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}
H. Fazli, G. Daryanabard, A. Janbaz, R. Mirzaei, Hamid Hosseinpour, N. Vahedi
The freshwater Prussian carp, Carassius gibelio (Bloch, 1782) is a cyprinid, known as a hazardous species for native fish communities. In the present study, some population parameters, including length-weight relationship ( LWR ), condition factor ( KF ), relation condition factor ( K n ), age and growth of C. gibelio in the Azad dam, Kordestan Province, Iran were estimated. The LWR indicating a positive allometric growth pattern. The von Bertalanffy growth parameters were estimated as L ∞ =337mm, K =0.255 yr -1 , t 0 =-0.21 yr. There was a significantly positive correlation between TL and KF ( r 2 =0.89). The average of K n was lower than 1 which suggested that the well-being of the fish was not good in the Azad dam region.
{"title":"Some biological characteristics of Carassius gibelio (Bloch, 1782) (Teleostei: Cyprinidae) in the Azad dam Lake in Western Iran","authors":"H. Fazli, G. Daryanabard, A. Janbaz, R. Mirzaei, Hamid Hosseinpour, N. Vahedi","doi":"10.22034/IJI.V5I3.254","DOIUrl":"https://doi.org/10.22034/IJI.V5I3.254","url":null,"abstract":"The freshwater Prussian carp, Carassius gibelio (Bloch, 1782) is a cyprinid, known as a hazardous species for native fish communities. In the present study, some population parameters, including length-weight relationship ( LWR ), condition factor ( KF ), relation condition factor ( K n ), age and growth of C. gibelio in the Azad dam, Kordestan Province, Iran were estimated. The LWR indicating a positive allometric growth pattern. The von Bertalanffy growth parameters were estimated as L ∞ =337mm, K =0.255 yr -1 , t 0 =-0.21 yr. There was a significantly positive correlation between TL and KF ( r 2 =0.89). The average of K n was lower than 1 which suggested that the well-being of the fish was not good in the Azad dam region.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"5 1","pages":"243-249"},"PeriodicalIF":0.0,"publicationDate":"2018-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46630107","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}
Ghasem Farkhondeh, M. Safaie, E. Kamrani, T. Valinassab
This study was conducted to determine some biological aspects of the tiger tooth croaker Otolithes ruber in the coastal waters of the northern Makran/Oman Sea. Monthly total length frequency data of O. ruber were collected by bottom gill-net and bottom trawl from August 2016 to August 2017. ELEFAN-I method in the software package FISAT-II was used to analyze of the length frequency data. The total length and weight relationship demonstrated that growth in this species is negative allometric. The asymptotic total length ( TL∞ ) was estimated as 60 and 65cm for males and females, respectively. The growth parameter K was calculated as 0.43 y -1 for males and 0.40 y -1 for females. The total mortality, natural mortality and fishing mortality rates were estimated as 1.85, 0.83 and 1.02 for males and 1.37, 0.77 and 0.60 for females. The exploitation rates were estimated at 0.44 for males and 0.55 for females. The sex ratio revealed that it was not a constant 1:1 throughout the year, with 58 % for females. The Gonado-Somatic Index (GSI) showed upswing trend from January to June, and the maximum GSI was 7.1±0.6 in April. The recorded result showed that the tiger tooth croaker can spawn all year round and have a spawning peak from April to June (spring season). The Lm 50 % was estimated at 43.3cm of total length.
本研究旨在确定马可兰/阿曼海北部沿海水域虎牙鱼Otolithes ruber的一些生物学方面。2016年8月至2017年8月，采用底刺网和底拖网采集了橡胶胶鱼的月总长度频次数据。采用FISAT-II软件包中的ELEFAN-I方法对长度频率数据进行分析。总长度与总重的关系表明，该物种的生长为负异速生长。雄性和雌性的渐近总长度(TL∞)分别为60和65cm。生长参数K雄性为0.43 y -1，雌性为0.40 y -1。雄性总死亡率、自然死亡率和捕捞死亡率分别为1.85、0.83和1.02，雌性分别为1.37、0.77和0.60。雄性和雌性的剥削率分别为0.44和0.55。性别比显示，全年的性别比不是1:1不变，女性的性别比为58%。性腺-躯体指数(GSI)在1 ~ 6月呈上升趋势，4月GSI最大值为7.1±0.6。记录结果表明，虎牙鱼全年可产卵，4 - 6月为产卵高峰期(春季)。50%的Lm全长估计为43.3cm。
{"title":"Population parameters and reproductive biology of Otolithes ruber (Bloch & Schneider, 1801) (Teleostei: Sciaenidae) in the northern Makran Sea","authors":"Ghasem Farkhondeh, M. Safaie, E. Kamrani, T. Valinassab","doi":"10.22034/iji.v5i3.297","DOIUrl":"https://doi.org/10.22034/iji.v5i3.297","url":null,"abstract":"This study was conducted to determine some biological aspects of the tiger tooth croaker Otolithes ruber in the coastal waters of the northern Makran/Oman Sea. Monthly total length frequency data of O. ruber were collected by bottom gill-net and bottom trawl from August 2016 to August 2017. ELEFAN-I method in the software package FISAT-II was used to analyze of the length frequency data. The total length and weight relationship demonstrated that growth in this species is negative allometric. The asymptotic total length ( TL∞ ) was estimated as 60 and 65cm for males and females, respectively. The growth parameter K was calculated as 0.43 y -1 for males and 0.40 y -1 for females. The total mortality, natural mortality and fishing mortality rates were estimated as 1.85, 0.83 and 1.02 for males and 1.37, 0.77 and 0.60 for females. The exploitation rates were estimated at 0.44 for males and 0.55 for females. The sex ratio revealed that it was not a constant 1:1 throughout the year, with 58 % for females. The Gonado-Somatic Index (GSI) showed upswing trend from January to June, and the maximum GSI was 7.1±0.6 in April. The recorded result showed that the tiger tooth croaker can spawn all year round and have a spawning peak from April to June (spring season). The Lm 50 % was estimated at 43.3cm of total length.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"5 1","pages":"173-183"},"PeriodicalIF":0.0,"publicationDate":"2018-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42483994","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 paper provides information on the osteological characterization of the genus Puntius with respect to six river systems of Southern Western Ghats. Fishes were collected using cast net, dip net, gill net and drag net from various streams and rivers of Southern Western Ghats. Clearing and staining methods was carried out for osteological study. After clearing and double staining, the specimens were observed under a stereomicroscope and photographed using a digital camera. Twenty-nine morphometric and meristic osteology characters were taken. Principal component analysis and cluster analysis were performed to group the species and to detect the similarity between the species. Comparing all the species it was observed that the species were grouped into three groups. The first class has 10 species P. mahecola, P. chola, P. bimaculatus, P. dorsalis, P. melanampyx, P. fasciatus, P. ticto, P. denisonii, P. sophore, P. conchonius. The second class has 4 species; P. filamentous, P. sarana spirulus, P.amphibious and P. ophicephalus. The third class has only one species P. carnaticus well supporting the observations of Shantakumar & Vishwanath (2006).
{"title":"Osteological characterization of the genus Puntius (Teleostei: Cyprinidae) recorded from six river systems of southern Western Ghats, India","authors":"A. Arunkumar, N. Lakshmi, A. Manimekalan","doi":"10.22034/IJI.V5I2.252","DOIUrl":"https://doi.org/10.22034/IJI.V5I2.252","url":null,"abstract":"This paper provides information on the osteological characterization of the genus Puntius with respect to six river systems of Southern Western Ghats. Fishes were collected using cast net, dip net, gill net and drag net from various streams and rivers of Southern Western Ghats. Clearing and staining methods was carried out for osteological study. After clearing and double staining, the specimens were observed under a stereomicroscope and photographed using a digital camera. Twenty-nine morphometric and meristic osteology characters were taken. Principal component analysis and cluster analysis were performed to group the species and to detect the similarity between the species. Comparing all the species it was observed that the species were grouped into three groups. The first class has 10 species P. mahecola, P. chola, P. bimaculatus, P. dorsalis, P. melanampyx, P. fasciatus, P. ticto, P. denisonii, P. sophore, P. conchonius. The second class has 4 species; P. filamentous, P. sarana spirulus, P.amphibious and P. ophicephalus. The third class has only one species P. carnaticus well supporting the observations of Shantakumar & Vishwanath (2006).","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"5 1","pages":"139-166"},"PeriodicalIF":0.0,"publicationDate":"2018-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44691063","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}
S. O. Oladipo, L. M. Nneji, A. T. Anifowoshe, I. C. Nneji, O. A. Iyiola, A. Adeola, M. Mustapha
Length-weight relationship and condition factor of seven freshwater fish species from Jebba Lake (Nigeria) were investigated. A total of 576 individuals were caught with hook and line, cast and gill nets from up and downstream sections of the lake. Sampling covered dry and raining seasons spanning across April to September 2017. The growth exponent b values of the studied species ranged between 2.23-3.89 and the condition factor between 0.47-1.61.
{"title":"Growth pattern and condition factor of seven freshwater fish species from Jebba Lake, north-central Nigeria","authors":"S. O. Oladipo, L. M. Nneji, A. T. Anifowoshe, I. C. Nneji, O. A. Iyiola, A. Adeola, M. Mustapha","doi":"10.22034/IJI.V5I2.272","DOIUrl":"https://doi.org/10.22034/IJI.V5I2.272","url":null,"abstract":"Length-weight relationship and condition factor of seven freshwater fish species from Jebba Lake (Nigeria) were investigated. A total of 576 individuals were caught with hook and line, cast and gill nets from up and downstream sections of the lake. Sampling covered dry and raining seasons spanning across April to September 2017. The growth exponent b values of the studied species ranged between 2.23-3.89 and the condition factor between 0.47-1.61.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"5 1","pages":"167-172"},"PeriodicalIF":0.0,"publicationDate":"2018-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42759022","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}
Cytological status of olfactory epithelium during different reproductive phases of Eutropiichthys vacha (Hamilton, 1822) were described by light microscopy. The olfactory organ was composed of various lamella contained two principal layer: olfactory mucosa and central core, radiated from midline raphe. A sharp divergence existed between the mucosa of the olfactory lamella and raphe. The olfactory mucosa was distinguished into sensory and non-sensory epithelium, which consisted of polymorphism of receptors, supporting, labyrinth, mucous and basal cells. The central core was made up of loosely disposed connective tissue, nerve fibres and blood capillaries. A well-developed basement membrane was clearly distinguishable in between the olfactory epithelium and central core. The seasonal changes of the olfactory mucosa during growth, maturation, spawning and post-spawning phases was characterized by considering the tallness and architecture of the receptor cells as main criteria along with commute cellular features and staining patterns of different cell types. The structural components of the olfactory epithelium were correlated with the olfaction in the life of fish concerned.
{"title":"Cellular organization of the olfactory epithelium during growth, maturation, spawning and post-spawning phases of freshwater catfish, Eutropiichthys vacha (Hamilton, 1822) (Teleostei: Siluriformes)","authors":"Saroj Kumar Ghosh","doi":"10.22034/iji.v5i2.278","DOIUrl":"https://doi.org/10.22034/iji.v5i2.278","url":null,"abstract":"Cytological status of olfactory epithelium during different reproductive phases of Eutropiichthys vacha (Hamilton, 1822) were described by light microscopy. The olfactory organ was composed of various lamella contained two principal layer: olfactory mucosa and central core, radiated from midline raphe. A sharp divergence existed between the mucosa of the olfactory lamella and raphe. The olfactory mucosa was distinguished into sensory and non-sensory epithelium, which consisted of polymorphism of receptors, supporting, labyrinth, mucous and basal cells. The central core was made up of loosely disposed connective tissue, nerve fibres and blood capillaries. A well-developed basement membrane was clearly distinguishable in between the olfactory epithelium and central core. The seasonal changes of the olfactory mucosa during growth, maturation, spawning and post-spawning phases was characterized by considering the tallness and architecture of the receptor cells as main criteria along with commute cellular features and staining patterns of different cell types. The structural components of the olfactory epithelium were correlated with the olfaction in the life of fish concerned.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"5 1","pages":"126-138"},"PeriodicalIF":0.0,"publicationDate":"2018-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47170480","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 aim of the study was to investigate the variation in diversity and abundance of food items in Hemibagrus punctatus in relation to season and also to assess its food preference and feeding behaviour which may reflect the availability of prey items in upstream and downstream areas of Hogenakkal area under the Cauvery river systems. Through its stomach content analysis, the fish has been found to be omnivorous and euryphagous, with only a few qualitative differences in the diet. Feeding rate was found to vary in relation to monsoon caused environmental changes during the course of a year. Among the wide variety of prey consumed, juvenile fishes (39.88%) formed an important dietary component. The next major food group was insects (19.50%) followed by diatoms (11.54%), green algae (8.40%), crustaceans (7.29%), blue green algae (3.98%), plant matter (2.79%), worms (2.71%), copepods (1.33%), cladocerans (1.33%), and mollusks (1.33%). All the food items of this fish (% of food- composition) was found vary in monthly. The present findings would facilitate the examination of complex food and feeding regimes of fishes and would help identify the groups of species that use similar resources within a specific community and could also serve as a reference database for feeding ecology of fishes in highly impacted tropical habitats.
{"title":"Food and feeding habits of critically endangered bagrid catfish Hemibagrus punctatus (Jerdon, 1862) (Teleostei: Bagridae) in the Cauvery River, South India","authors":"M. Raja, P. Perumal","doi":"10.22034/IJI.V5I2.260","DOIUrl":"https://doi.org/10.22034/IJI.V5I2.260","url":null,"abstract":"The aim of the study was to investigate the variation in diversity and abundance of food items in Hemibagrus punctatus in relation to season and also to assess its food preference and feeding behaviour which may reflect the availability of prey items in upstream and downstream areas of Hogenakkal area under the Cauvery river systems. Through its stomach content analysis, the fish has been found to be omnivorous and euryphagous, with only a few qualitative differences in the diet. Feeding rate was found to vary in relation to monsoon caused environmental changes during the course of a year. Among the wide variety of prey consumed, juvenile fishes (39.88%) formed an important dietary component. The next major food group was insects (19.50%) followed by diatoms (11.54%), green algae (8.40%), crustaceans (7.29%), blue green algae (3.98%), plant matter (2.79%), worms (2.71%), copepods (1.33%), cladocerans (1.33%), and mollusks (1.33%). All the food items of this fish (% of food- composition) was found vary in monthly. The present findings would facilitate the examination of complex food and feeding regimes of fishes and would help identify the groups of species that use similar resources within a specific community and could also serve as a reference database for feeding ecology of fishes in highly impacted tropical habitats.","PeriodicalId":14599,"journal":{"name":"Iranian Journal of Ichthyology","volume":"5 1","pages":"86-95"},"PeriodicalIF":0.0,"publicationDate":"2018-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49276280","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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