Population and seasonal distribution of Procamallanus daccai in Eutropiichthys vacha in Kaptai Lake, Chittagong, Bangladesh

2005 ◽  
Vol 79 (4) ◽  
pp. 339-343
Author(s):  
A.K.M. Hafizuddin ◽  
A.K. Bashirullah
Keyword(s):  
Seasonal Distribution ◽  
Size Group ◽  
Summer Period ◽  
Female Fish ◽  
Infected Male ◽  
Male Fish ◽  
Infected Female ◽  
Male And Female ◽  
Mean Intensity ◽  
The Mean

AbstractThe population and seasonal distribution of Procamallanus daccai (Nematoda: Procamallanidae) in Eutropiichthys vacha (Siluridae) from the Kaptai Lake were studied for a period of 20 months during 1986–1987. A total of 208 fish were necropsied and 5652 worms were recovered, of which 2392 were from 87 infected male fish and 3260 were from 89 infected female fish. Prevalence values varied from 50% to 95%. The intensity and abundance of nematodes fluctuated over the study period and are statistically significant (F=14.87, P<0.0001), and showed a seasonal preference for the summer period (F=33.39, P<0.05). The mean intensity was the highest in the smallest size group at 66.3±12.7 which gradually decreased to 4±1.89 in the largest size group. No significant differences were found between parasites from male and female hosts, except in the summer. Male parasites were less abundant in the population. Female worms were grouped into immature, maturing and gravid and all these stages were present throughout the year. The highest occurrence of both immature and gravid P. daccai was found during the months of February to April each year. Peak recruitment seems to occur during this period due to the presence of high quantities of immature worms.

scholarly journals Study on infestations and biodiversity of metazoan parasites in Channa punctatus (Bloch), Mymensingh region

2019 ◽  
Vol 17 (3) ◽  
pp. 409-416
Author(s):  
Naoshin Farzana ◽  
Jasmin Naher ◽  
Md Abu Zafar ◽  
Kirtunia Juran Chandra ◽  
Gias Uddin Ahmed
Keyword(s):  
The Other ◽  
Channa Punctatus ◽  
Digenetic Trematode ◽  
Female Fish ◽  
Exotic Fish ◽  
Male Fish ◽  
Metazoan Parasites ◽  
Mean Intensity ◽  
The Mean ◽  
Day By Day

An investigation was conducted on infestation and reviewed biodiversity of metazoan parasites in Channa punctatus of Mymensingh region from July 2013 to June 2014. A total of 235 fish were examined and 9 species of four groups of parasites were recorded. They were (i) Euclinostomum multicaecum Tubangui and Masilungan, 1935 (ii) Euclinostomum heterostomum (Rudolphi, 1809) (iii) Genarchopsis goppo Ozaki, 1925 (iv) Allocreadium handiai  Pandey, 1937 (v) Senga ophiocephalina (Tseng, 1933) (vi) Porrocaecum sp. (vii) Ascaridia sp. (viii) Contracaecum sp. (ix) Pallisentis ophiocephali (Thapar, 1930).The maximum (86.67%) prevalence was found in  (86.67%) October and minimum (35.00%) in December whereas the maximum mean intensity (10) was observed in June and the minimum (1.42) was recorded from December. The prevalence was observed higher (68.85%) in smaller size of fish and in case of larger fish the prevalence was lower and the value was (53.62%). On the other hand, the mean intensity (5.45) was higher in smaller fish and lower (3.39) in medium sized fish. Both prevalence and mean intensity was found maximum in female fish than male fish. Among the four groups of parasites, infestation of Digenetic trematode is much higher than Nematoda, Cestoda and Acanthocephala. During the study, a list of parasites reported from Channa punctatus of Indian sub-continent was prepared. It was found that 38 species of Digenea, 4 species of Cestoda, 26 species of Nematoda and 5 species Acanthocephala were recorded. The Biodiversity of parasites seemed to be declined day by day. The responsible factors for this declination may be environmental degradation, entry of exotic fish and modernization of aquaculture etc. J Bangladesh Agril Univ 17(3): 409–416, 2019

Differential postspawning mortality among male and female capelin (Mallotus villosus Müller) in captivity

1998 ◽  
Vol 76 (3) ◽  
pp. 588-592 ◽  
Author(s):  
Margaret PM Burton ◽  
Shawn R Flynn
Keyword(s):  
Spawning Season ◽  
Mallotus Villosus ◽  
Female Fish ◽  
Male Fish ◽  
Spawning Period ◽  
Male And Female ◽  
Progressive Development ◽  
In Captivity ◽  
Capelin Mallotus Villosus ◽  
In The Wild

Male and female capelin (Mallotus villosus Müller) were captured in 1993 at the start of spawning and males were captured in 1995 at the end of the spawning period. All male fish from both years died within 6 weeks of capture. Spent males captured in the wild showed almost empty testes with very few residual sperm and no evidence of developing spermatocytes. All female fish survived the first 6 weeks and over 50% survived 20 weeks. Sampling of the surviving females after 20 weeks showed evidence of prior spawning and progressive development of oocytes for the next summer's spawning season. It was concluded that while males may be semelparous, females are inherently iteroparous.

Differences in the parasite infections in three-spined sticklebacks (Gasterosteus aculeatus L.) of different sex, age and size

Parasitology ◽  
1971 ◽  
Vol 63 (3) ◽  
pp. 407-418 ◽  
Author(s):  
Linda Pennycuick
Keyword(s):  
Research Council ◽  
Gasterosteus Aculeatus ◽  
Feeding Habits ◽  
Science Research ◽  
Small Fish ◽  
Female Fish ◽  
Male And Female ◽  
Schistocephalus Solidus ◽  
Parasite Infections ◽  
The Mean

A population of Gasterosteus aculeatus from Priddy pool in Somerset was infected with three species of parasites: Schistocephalus solidus, Diplostomum gasterostei and Echinorhynchus clavula. The variations in the incidence and intensity of the infections with the sex, age and size of the sticklebacks are described.The infections with the three parasites were very similar in male and female sticklebacks. The weights of Schistocephalus were greater in the females, however;the mean weight of the plerocercoids was larger suggesting that they grew more rapidly in female fish.The Schistocephalus infection increased in small fish, under 1 year of age, but in older larger ones the infection decreased. These changes can be related both to the feeding habits of the fish and to the weight relationships of host and parasite.It was found that the weight of Schistocephalus did not greatly exceed that of the fish, and also that the combined weight of fish plus Schistocephalus was rarely greater than 3 g. Therefore the proportional weight of Schistocephalus, or parasite index, was lower in sticklebacks heavier than about 1·5 g.The Diplostomum and Echinorhynchus infections both increased with age and size of fish, but the largest sticklebacks were not the most heavily infected. These increases can be related to the feeding habits of the fish in the case of Echinorhynchus and to accumulation with time in the case of Diplostomum.In all three species the largest and oldest fish were not the most heavily infected.It is suggested that the old fish are becoming senile and are therefore less able to support large parasite burdens.I am very grateful to Dr H. D. Crofton for his constant advice and encouragement during this study, and to Dr R. A. Avery for useful discussions. This work was supported by a Science Research Council research studentship and by a NATO studentship.

scholarly journals Infection status of Clinostomum complanatum (Rudolphi, 1819) metacercaria from Channa punctatus of Meerut District

2011 ◽  
Vol 3 (2) ◽  
pp. 280-283 ◽  
Author(s):  
Bindu Sharma ◽  
Vidushi Rani ◽  
Ayushi Chaudhary
Keyword(s):  
Digenetic Trematode ◽  
Infection Status ◽  
Present Communication ◽  
Female Fish ◽  
Male And Female ◽  
Mean Intensity ◽  
Length Group ◽  
Infection Susceptibility ◽  
One Year ◽  
Clinostomum Complanatum

Metacercaria Clinostomum complanatum is a digenetic trematode, which is mainly found in fresh water fishes. Present communication deals with the infection status of C. complanatum in C. punctatus of Meerut district, which is supported by the data spreading over one year. About 250 specimens of C. punctatus from different ponds of Meerut were studied through regular periodical collection in the year Jan 2010 to Dec 2010. Overall prevalence 35.6%, mean intensity 3.06 and abundance 1.09 were reported. The infection was maximum in winter and minimum in rainy season. Prevalence, intensity and abundance of the infestation were also found to be related to different length group and sex of the hosts, the medium sized fishes were more infected and the larger size fishes were less infected while the smaller size fishes showed moderate infection. Susceptibility of infection was not significantly different between male and female fish.

scholarly journals Keragaan Fenotipe Ikan Tambakan (Helostoma temminkii. Cuvier 1829) Hasil Domestikasi (Takhasi)

2017 ◽  
Vol 12 (1) ◽  
pp. 1
Author(s):  
Otong Zenal Arifin ◽  
Wahyulia Cahyanti ◽  
Jojo Subagja ◽  
Anang Hari Kristanto
Keyword(s):  
Standard Length ◽  
Body Shape ◽  
The Body ◽  
Whole Body ◽  
Female Fish ◽  
Male Fish ◽  
Yellow Colour ◽  
Male And Female ◽  
Green Colour ◽  
Freshwater Aquaculture

Ikan tambakan berpotensi dibudidayakan karena memiliki keunggulan seperti kemampuan beradaptasi terhadap perairan dengan kadar oksigen terlarut rendah dan tergolong ikan dengan nilai fekunditas yang tinggi. Penelitian untuk mengetahui keragaan fenotipe ikan tambakan hasil domestikasi telah dilakukan di Balai Riset Perikanan Budidaya Air Tawar dan Penyuluhan Perikanan, Bogor. Tujuan dari penelitian ini adalah untuk mengkarakterisasi bentuk morfologi berdasarkan morfometrik, meristik, dan warna yang berguna dalam pengelolaan pembenihan dan budidaya ikan tambakan. Pengambilan data dilakukan melalui pengamatan bentuk tubuh dan genitalia ikan jantan dan betina, pengukuran bagian tubuh, penghitungan jumlah dan jenis jari sirip, linea lateralis, warna ikan dan morfometrik. Hasil yang diperoleh menunjukkan bentuk tubuh ikan jantan lebih ramping dibanding ikan betina, ikan betina mempunyai rasio panjang standar terhadap tinggi badan sebesar 2,08±0,117; ikan jantan sebesar 2,26±0,095. Rasio panjang standar terhadap lebar badan pada ikan jantan adalah 0,95±0,018 dan ikan betina 1,01±0,025. Nilai koefisien variasi (CV) rerata seluruh karakter tubuh tergolong rendah, dengan nilai 12,2±10,73. Karakter C4 (awal sirip dorsal-akhir sirip anal) merupakan karakter nilai CV paling rendah yaitu 3,2% dan karakter D1 (akhir sirip anal-awal sirip ekor bawah) mempunyai nilai CV tertinggi yaitu 43,8%. Berdasarkan karakter meristik dan warna, tidak terdapat perbedaan antara jantan dan betina. Warna ikan tambakan terdiri atas warna punggung hijau keabuan (TC 613), warna operculum hijau keperakan (TC 613), warna perut perak sampai keabuan (TC 521) dan warna gonad kuning oranye (TC 023).Kissing gouramy has potentially to be cultivated due to the ability to adapt on swampy waters and has high eggs fecundity. Research on phenotype performance of domesticated kissing gouramy was done at the Institute for Freshwater Aquaculture Research and Development, Bogor. The purpose of this study was to characterize morphological forms based on the morphometrics, meristics, and color of domesticated fish that will be useful in the aquaculture management. The data were collected through observation of body shape and genitalia of male and female fish, measurement of body parts, counting the number and the type of fin, linea lateralis, fish color and the morphometric measurement. The obtained results showed that the body shape of the male fish was slender than that of the female fish, the female fish had a ratio of standard length to the height of 2.08 ± 0.117, male fish of 2.26 ± 0.095. The standard length ratio to body width in male fish was 0.95 ± 0.018 and female fish was 1.01 ± 0.025. The mean value of coefficient variation (CV) of the whole body character was low, with value 12,2 ± 10,73. C4 character (beginning of dorsal fin-end of anal fin) was the lowest character of CV value of 3.2% and D1 character (final anal fin-bottom caudal fin) had the highest CV value of 43.8%. Based on the meristic and color character there was no difference between male and female. The dorsal, overculum, ventral part and matured gonad of domesticated kissing gouramy fish had gray-green colour (TC 613), silver-green colour (TC 613), silver-gray to silver colour (TC 521) and orange yellow colour (TC 023) respectively.

scholarly journals Morphometrics and Growth Patterns of Halfbeak Fish (Nomorhamphus sp.) in Moramo River, South Konawe Regency

2021 ◽  
Vol 322 ◽  
pp. 01035
Author(s):  
Sjamsu Alam Lawelle ◽  
Asriyana ◽  
Andy Budi Nofrianto
Keyword(s):  
Scientific Information ◽  
Mesh Size ◽  
Freshwater Fishes ◽  
Growth Patterns ◽  
Female Fish ◽  
Male Fish ◽  
Morphometric Characters ◽  
Male And Female

Halfbeaks (Nomorhamphus sp.) are freshwater fishes that inhabit the Moramo River. Data and scientific information of this species are still limited. This study aims to determine the morphometric characters and growth patterns of halfbeak fish in the Moramo River. This research was conducted from April to June 2020. The fish was caught using a modified seine net. The length of the net is 15 m, width 1.2 m, and mesh size 0.5 x 0.5 inches. There is a pocket in the middle of the net with 40 cm of diameter and 1.5 m of length. The fish were separated by sex, weighed, and preserved using 4% formalin. Measurement of 22 morphometric characters using calipers with an accuracy of 0.1 mm. A total of 120 fish were caught, with 60 males and 60 females. Male fish have body lengths and weights ranging from 40.5-71 mm and 0.45-2.93 g, while female fish have body lengths and weights ranging from 43.5-91.5 mm and 0.5-5.74 g. The results of the growth patterns of male and female halfbeaks are negative allometric (b<3).

scholarly journals Caryophyllaeid infestations on the sex and size of Walking Catfish Clarias batrachus

2012 ◽  
Vol 40 (1-2) ◽  
pp. 56-59
Author(s):  
MS Chhanda ◽  
KJ Chandra
Keyword(s):  
Rainy Season ◽  
Winter Season ◽  
Size Group ◽  
Clarias Batrachus ◽  
Medium Size ◽  
Host Fish ◽  
Male And Female ◽  
Mean Intensity ◽  
Size Groups ◽  
Different Levels

An investigation was carried out on the caryophyllaeid infestations in walking catfish Clarias batrachus in relation to different sexes and size groups during August 2010 to July 2011. A total of 227 host fish were collected from different water bodies of Mymensingh for examination. Among them 188 C.batrachus were infested with 1432 parasites by five different caryophyllaeid cestodes species. Prevalence was 100% during November and December both in male and female hosts. In other period of the year, female were more infested. In male fishes, the highest intensity and abundance were recorded in December and index of infection in February. In female fishes, the lowest infestations were recorded during the months of August, September and October. Parasites showed different levels of infestations in different size groups of fishes. Higher prevalence was recorded in medium size fishes in winter and summer and smaller size fishes in autumn. However, the index of infestations and abundance were higher in same size group only in winter season. The lowest prevalence and mean intensity were recorded in rainy season and abundance was in summer in smaller size group of fish.DOI: http://dx.doi.org/10.3329/bjas.v40i1-2.10792Bang. J. Anim. Sci. 2011. 40 (1-2): 56-59

scholarly journals Kajian Pertumbuhan Ikan Tembakang (Helostoma temminckii) Di Rawa Bawang Latak Kabupaten Tulang Bawang, Lampung

2017 ◽  
Vol 15 (2) ◽  
Author(s):  
Bintang Ubamnata ◽  
Rara Diantari ◽  
Qadar Hasani
Keyword(s):  
Condition Factor ◽  
Growth Parameters ◽  
Economic Value ◽  
Sampling Frequency ◽  
Fish Growth ◽  
Fish Populations ◽  
Fish Length ◽  
Female Fish ◽  
Male Fish ◽  
Male And Female

Tembakang Fish (Helostoma temminckii) is one of the fish that have high economic value in Rawa Bawang Latak. Overfishing and the introduction of fish resulted tembakang number of fish populations decline, so it takes the efforts of domestication. This study aims to determine the growth pattern that includes tembakang fish length and weight relationships, growth parameters, and factor conditions. Research carried out for four months, ie in October 2013 - January 2014. Tembakang fishing done at two stations in Rawa Bawang Latak. The sampling frequency of fish is done only once a month using Sero. The results showed that the pattern of growth tembakang fish is allometric positive, condition factor values male and female fish were not significantly different, female tembakang fish growth faster than the male fish, fish tembakang males on the size of 180.6 mm was 21 months, while females in size 191.1 mm 8 months old. Keywords: Tembakang, Growth, Sero, Rawa Bawang Latak.

scholarly journals Biological Aspect of Bullet Tuna Auxis rochei (Risso, 1810) in the Makassar Strait, West Sulawesi, Indonesia

2019 ◽  
Vol 77 (3) ◽  
pp. 119-126
Author(s):  
Wayan Kantun ◽  
Indra Cahyono ◽  
Wayan Suma Arsana
Keyword(s):  
Size Distribution ◽  
Growth Pattern ◽  
Stomach Fullness ◽  
Female Fish ◽  
Male Fish ◽  
Positive Allometry ◽  
Male And Female ◽  
Total Length ◽  
Fullness Index ◽  
Fish Gut

Abstract The objectives of the present study were to determine the size distribution, growth pattern, feeding habit and stomach fullness index of bullet tuna Auxis rochei in the Makassar Strait, West Sulawesi. The research was conducted for six months between March and August 2017. Sampling collection was carried out using the handline technique. A total of 2160 fish were caught. Their total length ranged from 15.8 to 28.5 cm and weight ranged from 52.3 to 366.5 g. The total length of male fish ranged from 18.5 to 28.5 cm and weight ranged from 77.5 to 366.5 g. The total length of female fish ranged from 15.8 to 27.5 cm and weight ranged from 52.3 to 328.8 g. The growth pattern of bullet tuna for both male and female fish was classified into a positive allometry (b>3); the type of food found in the fish gut consisted of crustacean (12.50% to 25.64%), chepalopods (7.32 to 34.80%) and unidentified (47.69 to 64.51%), respectively. Nonetheless, the predominant food condition was not identified and in the gut there was generally no food present. The stomach fullness index ranged from 1.13% to 7.18%, ¾ (12.11 to 15.74%), ½ (12.27 to 23.14%) and empty (59.26 to 65.74%). The length size distribution of male bullet tuna was larger than the female with a positive allometric growth pattern. However, the growth pattern of male and female bullet tuna statistically showed no difference.

Morphological allometry and intersexuality in horsehair-worm-infected mantids, Hierodula formosana (Mantodea: Mantidae)

Parasitology ◽  
2015 ◽  
Vol 142 (8) ◽  
pp. 1130-1142
Author(s):  
MING-CHUNG CHIU ◽  
CHIN-GI HUANG ◽  
WEN-JER WU ◽  
SHIUH-FENG SHIAO
Keyword(s):  
Reproductive System ◽  
Sexual Differentiation ◽  
Morphological Alteration ◽  
Sex Characteristics ◽  
Antennal Sensilla ◽  
Infected Male ◽  
Infected Female ◽  
Male And Female ◽  
Energy Exploitation ◽  
Insect Sex

SUMMARYParasitic castration is a strategy used by parasites to minimize damage to the host by consuming its reproductive system, which results in the morphological alteration of the host. We determined that the forewing shape and density of the antennal sensilla of field-collected adult male mantids (Hierodula formosana), infected by horsehair worms (Chordodes formosanus) was partially feminized (intersexuality), and both male and female mantids infected by horsehair worms exhibited allometric changes in their wings and walking legs. In addition, the testes of most infected male adults disappeared or reduced in size, whereas the number of ovarioles in infected female adults was unaffected. The infection mainly influenced the structures related to host reproduction and locomotion, suggesting unbalanced energy exploitation and the reduction of parasitic virulence. In addition, the intersexuality of infected male adults indicated that sexual differentiation in insects, which researchers have considered to be an autonomous process, was influenced by the infection. The similarity of the antennae of infected male adults with those of last-instar female nymphs suggested that parasitic juvenilization may cause such feminization, but the mechanism of parasitic influence on insect sex characteristics should be studied further.

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