Ontogenetic and seasonal changes in the diet of the halfbeak Zenarchopterus dunckeri at Iriomote Island, southern Japan

Kanai, Takahiro; Nanjo, Kishio; Kohno, Hiroyoshi; Sano, Mitsuhiko

doi:10.1007/s10228-017-0581-8

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…The pronounced foraging tactic of common halfbeak to target prey (Hymnoptera) is similar the registered by Delabie et al (2006), and is thus presumed to be related to the presence of insects on the seawater surface. This behaviour has been registered by other Hemiramphidae across different habitats (Tabassum et al 2017;Abidin et al 2019), where insects were ingested in proximity to oating objects or sucked from the water surface (Kanai et al 2017).…”

Section: Discussionsupporting

confidence: 63%

Predation risk, foraging and reproduction of an insectivore fish species associated with two estuarine habitats

Guedes

Pereira

Brito

et al. 2023

Preprint

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Pneumatophore fringes and mudflats are extremely valuable habitats and provide structures on which many fish species benefit in terms of food and reduced predation risk. We analysed the spatiotemporal patterns in feeding habits, reproductive aspects and effects of predatory fish presence to assess the ecological drivers of the common halfbeak, Hyporhamphus unifasciatus, in a Brazilian estuary. Sampling was conducted in the rainy (January to July 2016) and dry (August to December 2016) periods. Fish were collected in the two estuarine habitats using a beach seine. In summary, the results demonstrated that the number of predatory fishes was a strong predictor of population abundance and biomass, followed by pneumatophore complexity. The abundance and biomass values tended to increase with increasing habitat structural complexity towards the upper estuary. There was evidence that fish exhibited movement during the rainy season related to spawning events and subsequent juvenile recruitment in this area. Hymnoptera was the item most frequently ingested and made the greatest contributions to the volume of diet in habitat types throughout the year. There was an increase in the condition factor in the rainy season and thus was associated with energy reserves, reproduction and growth (fitness). We concluded that predation is an important ecological process that operates at local spatial scales and that together with the density of pneumatophores, predation is considered an important attractiveness that could affect the abundance of common halfbeak populations associated with estuarine habitats.

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Section: Discussionsupporting

confidence: 63%

Predation risk, foraging and reproduction of an insectivore fish species associated with two estuarine habitats

Guedes

Pereira

Brito

et al. 2023

Preprint

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“…Another halfbeak species, Zenarchopterus dunckeri, has been reported to change its diet as it grows in nature. In general, juvenile fish feed more on zooplankton and small gastropods, while larger juveniles feed land insects, such as ants and flies (Kanai et al, 2017). In another halfbeak species, Hemiramphus far, is known as an omnivorous fish, as it feeds on fish, isopods, ostracods, Daphnia, shellfish, algae, and unidentified parts of plants and animals (Tabassum et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

The ontogenic study of early life stages of culture-bred Nomorhamphus sp. (Zenarchopteridae) from Lindu, Central Sulawesi

Herjayanto,

Carman,

Tri Soelistyowati

et al. 2023

Jurnal Akuakultur Indonesia

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Nomorhamphus sp. is a freshwater fish that has been traded as an ornamental fish. This fish is unique as an endemic species with a halfbeak-like jaw and orange color on the caudal fin. However, this fish culture information needs a further information. Based on this condition, it is necessary to conduct a study as a basis for ornamental fish breeding and growing-out activities through domestication. A crucial problem in this fish is larval rearing, which can be observed through ontogeny studies. The study was conducted on the newly-born larval behavior, morphological development, andropodium development, growth, and survival rate at the early stages, namely larvae to juvenile. The results showed that the newly-born larvae of Nomorhamphus sp. Lindu had a total length of 1.6-1.8 cm. Larvae could swim four hours 22 minutes after birth and feed artemia nauplii with surface feeding type. The initial juvenile stage occurred 25 days of post-birth period with a total length of 2.0-2.2 cm. The water condition of the rearing during the study could support the larval transformation to juvenile. This study is the first report related to the aquaculture success of the early life stage of Nomorhamphus sp. Lindu at the domestication stage. Keywords: andropodium, domestication, endemic halfbeak, larva development, surface feeding ABSTRAK Nomorhamphus sp. adalah ikan air tawar yang telah diperdagangkan sebagai ikan hias. Ikan ini memiliki keunikan pada statusnya sebagai spesies endemik, bentuk mulut menyerupai paruh setengah (halfbeak), dan warna oranye pada sirip ekor. Namun informasi budidayanya belum diketahui dengan baik. Karena itu perlu dilakukan kajian sebagai dasar dalam kegiatan pengembangbiakan dan pembesaran sebagai ikan hias melalui domestikasi. Salah satu kegiatan penting dalam budidaya yaitu pemeliharaan larva yang dapat diamati melalui studi ontogeni. Kajian pada studi awal ini dilakukan pada stadia awal hidup yaitu larva sampai juvenil. Pengamatan dilakukan pada tingkah laku larva pascalahir, perkembangan morfologi, perkembangan andropodium, pertumbuhan dan sintasan pada lingkungan budidaya. Hasil penelitian menunjukkan bahwa larva Nomorhamphus sp. Lindu yang baru dilahirkan memiliki panjang total 1,6-1,8 cm. Larva telah dapat berenang pada umur empat jam 22 menit pascalahir (pcl) dan bisa makan naupli artemia dengan tipe surface feeding. Stadia awal juvenil terlihat pada umur 25 hari pcl dengan ukuran panjang total 2,0-2,2 cm. Kondisi media pemeliharaan selama penelitian dapat mendukung kehidupan larva sampai juvenil. Penelitian ini merupakan catatan pertama terkait keberhasilan budidaya stadia awal hidup Nomorhamphus sp. Lindu pada tahap domestikasi. Kata kunci: andropodium, domestikasi, ikan endemik, tipe makan permukaan, perkembangan larva

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Coastal Fishes in Mangroves

Nanjo

2022

Fish Diversity of Japan

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Ontogenetic and seasonal changes in the diet of the halfbeak Zenarchopterus dunckeri at Iriomote Island, southern Japan

Cited by 6 publications

References 9 publications

Predation risk, foraging and reproduction of an insectivore fish species associated with two estuarine habitats

Predation risk, foraging and reproduction of an insectivore fish species associated with two estuarine habitats

The ontogenic study of early life stages of culture-bred Nomorhamphus sp. (Zenarchopteridae) from Lindu, Central Sulawesi

Coastal Fishes in Mangroves

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