Zooplankton feeding in the fish Trichogaster pectoralis Regan

Boonsom, Jiamjit

doi:10.1007/978-94-017-3612-1_20

Cited by 4 publications

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“…Further, a shorter growing season requires that larger-sized fishes, obtained from hatcheries, be stocked. Farm manures should be used to promote zooplankton growth (Boonsom, 1984), and clearing the aquatic weeds from the fields in the early part of the growing season is helpful in ensuring growth and survivebility of frys and fingerlings. A controlled use of low toxicity herbicides and pesticides such as the carbamates and organophosphates (Singh etal., 1980;Arce & Cagauan, 1988) during the rice growing season should be enforced.…”

Section: Resultsmentioning

confidence: 99%

Some ecological aspects of fish populations in tropical ricefields

Ali

1990

Hydrobiologia

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Fish yields from the captural method of rice-fish farming system were monitored from 1985 to 1987. Seven species were obtained, with Trichogasterpectoralis, Clarias macrocephalus, and Channa striatus dominant and economically important. Low number of species is due to double cropping of rice resulting in increased human activities. The maximum yield obtained, 174.6 kg ha-1, is probably near the maximum for this type of rice-fish farming and the harvests have also stabilised when compared to those obtained in the early 1970s. Fish populations included more than one year-class in each harvest. A decline in individual weight, especially of herbivores, was recorded and correlated to the abundance of the species, and hence, to food supply.

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Section: Resultsmentioning

confidence: 99%

Some ecological aspects of fish populations in tropical ricefields

Ali

1990

Hydrobiologia

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“…In addition, T. pectoralis is zooplanktivorous by the early juvenile stage and subsequently omnivorous (Boonsom 1984), whereas A. testudineus is highly piscivorous, even in the larval stages smaller than 8 mm BL (Morioka et al 2009). …”

Section: Discussionmentioning

confidence: 99%

Growth and morphological development of laboratory-reared larval and juvenile snakeskin gourami Trichogaster pectoralis

2009

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Morphological development, including that of fins, labyrinth organ, body proportions, and pigmentation, in laboratory-hatched larval and juvenile snakeskin gourami Trichogaster pectoralis is described. Body lengths (BL; mean ± SD) of larvae and juveniles were 2.3 ± 0.1 mm just after hatching (day 0) and 8.2 ± 0.6 mm on day 22, reaching 14.1 ± 2.3 mm on day 48. Aggregate fin ray numbers attained their full complements in juveniles [11.8 mm BL. Preflexion larvae started feeding on day 2 following upper and lower jaw formation, the yolk being completely absorbed by day 12. Subsequently, oblong conical teeth appeared in postflexion larvae [8.2 mm BL (day 16). Melanophores on the body increased with growth, with a large dark spot developing on the lateral midline at the caudal margin of the body in flexion larvae [6.1 mm BL. Subsequently, a broad vertical dark band from the eye to the caudal peduncle developed in postflexion larvae [8.9 mm BL. Proportions of head and pre-anal lengths became constant in postflexion larvae greater than ca. 9-10 mm BL, whereas those of maximum body depth, eye diameter, and snout length failed to stabilize in fish of the size examined in this study. First soft fin ray of the pelvic fin elongated, reaching over 40% BL. The labyrinth organ differentiated in postflexion larvae [7.4 mm BL (day 22). Comparisons of larval and juvenile morphology with another anabantoid species Anabas testudineus were also made, revealing several distinct differences, particularly in the numbers of myomeres and fin rays in the dorsal/anal fins, mouth location and body shape.

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“…Dried snakeskin gourami is popular in Southeast Asia, and new advancements have resulted in higher prices for snakeskin gourami in the aquaculture market (Needham et al 2015). People in Southeast Asian nations are familiar with this species under several distinct names (Berra, 2011), i.e., sepat siam in Malaysia (Ambak et al, 2010), pla salid in Thailand, cà sac ran in Vietnam, trey kawnthor in Myanmar, and pa salid in Laos (Boonsom, 1986). It is native to Thailand's central plain, which runs from the Chao Phraya Basin to Cambodia, Vietnam, and Laos (Boonsom, 1986); however, owing to several initial introductions, it is currently widespread across Southeast Asian nations.…”

Section: Snakeskin Gouramimentioning

confidence: 99%

“…People in Southeast Asian nations are familiar with this species under several distinct names (Berra, 2011), i.e., sepat siam in Malaysia (Ambak et al, 2010), pla salid in Thailand, cà sac ran in Vietnam, trey kawnthor in Myanmar, and pa salid in Laos (Boonsom, 1986). It is native to Thailand's central plain, which runs from the Chao Phraya Basin to Cambodia, Vietnam, and Laos (Boonsom, 1986); however, owing to several initial introductions, it is currently widespread across Southeast Asian nations. Numerous research has shown that it is endemic to the Chao Phraya and Mekong basins of Laos, Thailand, Cambodia, and Vietnam (Kottelat, 2001).…”

Section: Snakeskin Gouramimentioning

confidence: 99%

“…Numerous research has shown that it is endemic to the Chao Phraya and Mekong basins of Laos, Thailand, Cambodia, and Vietnam (Kottelat, 2001). and that it has been widely introduced to Malaysia (Boonsom, 1986), India, Bangladesh, Sri Lanka, Indonesia, and the Philippines (Boonsom, 1986). This fish is both a food source and an attractive fish.…”

Section: Snakeskin Gouramimentioning

confidence: 99%

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Molecular characterization of Clinostomum spp. infecting cultured Snakeskin gourami (Trichopodus pectoralis) in Thailand

Islam

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The digeanean Clinostomum spp. is a significant parasitic pathogen of freshwater fish. It has low host specificity and a wide distribution geographically. Morphological and molecular data analyses have been performed on Clinostomum to assess its diversity. However, the molecular occurrence of Clinostomum spp. in aquaculture in Thailand has yet to be reported. Snakeskin gourami (Trichopodus pectoralis), a freshwater fish cultured in Thailand, has significant economic importance. Herein, the study focuses on describing a digenean Clinostomum in the abdominal cavity of T. pectoralis and reports the prevalence of this parasite from central Thailand. Two hundred and sixty-two 4 to 8- month-old T. pectoralis were obtained from Samut Sakorn, Samut Songkhram, Samut Prakarn, and Kanchanaburi provinces of central Thailand. We measured their overall length as well as their body weight. The body cavity of T. pectoralis was examined, and metacercariae of C. piscidium were discovered inside. In the abdominal cavity of infected fish, the parasites were discovered either free or adhered to adipose tissue and the outer membrane of the visceral organs. It was found that the total prevalence was 13.35 %, and the parasite intensities were found to be higher in the females taken from the farms than in the males (P<0.05). Pathological examination showed a few white migratory patterns on liver and spleen cells. The track presented histologically as the main central hepatic necrosis and hemorrhage surrounded�by layers�of macrophages and epithelioid cells. This metacercaria infection caused damage to the fish hosts' hepatic tissue, which disrupted their hepatic metabolism. As a result, the fish hosts experienced a slowdown in their rate of development and a reduction in their total body mass. In addition, morphological and molecular characterization of species was conducted using 18S rDNA and inter-transcribed spacer (ITS1 and ITS2) sequence data. A BLAST search of 18S rDNA sequence revealed 100% sequence similarity with C. piscidium (FJ970655) infecting banded gourami (Colisa fasciata) from India and 9098% sequence similarity with other clinostomid in Australia, USA, China, Israel, and Italy. ITS sequence data also revealed 100% sequence homology with the C. pisicidium isolated from C. fasciata from India. Based on phylogenetic analysis, this study reports the first molecular identification of C. piscidium species in cultured T. pectoralis in Thailand. �

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Zooplankton feeding in the fish Trichogaster pectoralis Regan

Cited by 4 publications

References 0 publications

Some ecological aspects of fish populations in tropical ricefields

Some ecological aspects of fish populations in tropical ricefields

Growth and morphological development of laboratory-reared larval and juvenile snakeskin gourami Trichogaster pectoralis

Molecular characterization of Clinostomum spp. infecting cultured Snakeskin gourami (Trichopodus pectoralis) in Thailand

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