Photoperiod influence on the cultivation of Steindachneridion scriptum (Pisces, Pimelodidae) juvenile

Zaniboni‐Filho, Evoy; Reynalte‐Tataje, David Augusto; Nuñer, Alex Pires de Oliveira; Meurer, Samira

doi:10.1590/s1516-89132008000300016

Cited by 7 publications

(9 citation statements)

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“…Furthermore, reproductive status of broodstock when reared under different rearing systems and hormonal treatment (hormone stimulation techniques to induce ovulation and spermiation) of Pimelodidae species were also described (Batlouni et al, 2006;Andrade et al, 2010;Romagosa, 2010). On the other hand, considering the number of species and their threatened situation, similar to the genus Steindachneridion, there is little descriptive information on reproduction and early development stages of this genus, such as: S. melanodermatum (Ludwig et al, 2005;Feiden et al, 2006); S. scripta (Adamante et al, 2007;Zaniboni-Filho et al, 2008), and no information is available to S. parahybae. According to Feiden et al (2006), it is very important to study embryos and larvae development, within two main goals, conservation and commercial fish farming.…”

Section: Introductionmentioning

confidence: 99%

“…Studies on the early development of fish not only yield information on spawning locations and the development features of the different species, but also allow comparisons between normal and altered development patterns (Meijide & Guerrero, 2000), and/or environmental influences (i.e., temperature and photoperiod), on the mechanisms of development during early-life stages (Feiden et al, 2006;Schütz et al, 2008;Zaniboni-Filho et al, 2008). These data will be also of great use in determining the biological changes when the wild broodstocks are transferred to captivity; therefore, they have a practical application in fish farming and fisheries biology (Meijide & Guerrero, 2000;Wikelski & Cooke, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Embryonic development and larval stages of Steindachneridion parahybae (Siluriformes: Pimelodidae): implications for the conservation and rearing of this endangered Neotropical species

et al. 2012

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Steindachneridion parahybae is a freshwater catfish endemic to the Paraíba do Sul River and is classified as an endangered Neotropical species. An increasing number of conservation biologists are incorporating morphological and physiological research data to help conservation managers in rescue these endangered species. This study investigated the embryonic and larval development of S. parahybae in captivity, with emphasis in major events during the ontogeny of S. parahybae. Broodstocks were artificially induced to reproduce, and the extrusion occurred 200-255 degree-hours after hormonal induction at 24°C. Larval ontogeny was evaluated every 10 minutes under microscopic/stereomicroscopic using fresh eggs samples. The main embryogenic development stages were identified: zygote, cleavage, including the morula, blastula, gastrula phase, organogenesis, and hatching. The extruded oocytes showed an average diameter of 1.10 ± 0.10 mm, and after fertilization and hydration of eggs, the average diameter of eggs increased to about 1.90 ± 0.60 mm, characterized by a large perivitelline space that persisted up to embryo development, the double chorion, and the poles (animal and vegetative). Cell division started about 2 minutes after fertilization (AF), resulting in 2, 4, 8 (4 x 2 arrangement of cells), 16 (4 x 4), 32 (4 x 8) and 64 (2 x 4 x 8) cells. Furthermore, the blastula and gastrula stages followed after these cells divisions. The closed blastopore occurred at 11 h 20 min AF; following the development, the organogenetic stages were identified and subdivided respectively in: early segmentation phase and late segmentation phase. In the early segmentation phase, there was the establishment of the embryonic axis, and it was possible to distinguish between the cephalic and caudal regions; somites, and the optic vesicles developed about 20 h AF. Total hatching occurred at 54 h AF, and the larvae average length was 4.30 ± 0.70 mm. Gradual yolk sac reduction was observed during the first two days of larval development. The first feeding occurred at the end of the second day. During the larval phase, cannibalism, heterogeneous larval growth and photophobia were also observed. This information will be important in improving the artificial reproduction protocols of S. parahybae in controlled breeding programs.Steindachneridion parahybae é um bagre de água doce, endêmico do rio Paraíba do Sul e é classificado como espécie neotropical ameaçada. Um número crescente de biólogos conservacionistas estão incorporando dados de pesquisas morfológicas e fisiológicas para ajudar os gestores de conservação no resgate destas espécies ameaçadas de extinção. Este estudo investigou o desenvolvimento embrionário e larval de S. parahybae em cativeiro, com ênfase nos principais eventos durante a ontogenia de S. parahybae. Reprodutores foram artificialmente induzidos à reprodução e a extrusão ocorreu com 200-255 horas-graus após a indução hormonal a 24°C. A ontogenia larval foi avaliada a cada 10 minutos sob microscópio/ estereomicroscópio, utiliz...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Embryonic development and larval stages of Steindachneridion parahybae (Siluriformes: Pimelodidae): implications for the conservation and rearing of this endangered Neotropical species

et al. 2012

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“…The feed was offered until apparent satiety during the dark phase of the photoperiod since the species consume more food during the night or under dim light when grown in a photoperiod of 12:12h (Zaniboni-Filho et al, 2008). The completion of feeding management in the absence of light was adjusted during acclimatization and was enough to observe the feeding activity of the fish and do not disturb them.…”

Section: Experimental Design and Feed Managementmentioning

confidence: 99%

“…In aquaculture, the species exhibits docile behavior during handling, high rates of survival, tolerance to low temperatures (Zaniboni-Filho et al, 2008), and constant 2/7 growth between the sexes during breeding (Maghelly et al, 2014). Studies on the cultivation of S. scriptum in cages revealed that the species has excellent performance for breeding in this production system (Zaniboni-Filho et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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FREQUíÅ NCIA ALIMENTAR NA CRIAÇÃO DE JUVENIS DE SURUVI <i>Steindachneridion scriptum</i>

Viana¹,

Sterzelecki²,

Sugai³

et al. 2020

Bol. Inst. Pesca

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The present study aimed to determine the ideal feeding frequency of feeding for suruvi juvenile. A study was conducted over 60 days to determine the effects of feeding frequency on growth metrics, body composition, and digestive enzyme activity of juvenile suruvi (initial mean weight: 60.19 ± 10.67 g). The experimental units were 1.0 m3 circular tanks, stocked with 94 fish, connected to a recirculating aquaculture system. The feed was offered during the dark phase of the 12:12 photoperiod with the following treatments in triplicate: FF1 = once a day at 20:00; FF2 = twice a day at 20:00 h and 06:00 h; and FF3 = three times a day at 20:00 h, 01:00 h, and 06:00 h. The fish fed a commercial carnivorous fish feed, comprised of 42% crude protein, 11% lipids, 20% carbohydrates, and 4,380 kcal kg-1 of crude energy in 6.0 mm pellets. At the end of the feeding, no significant differences were observed in the growth variables, body composition of proteins and lipids, and alkaline proteases and lipase activity (p>0.05) between treatments. However, there were significant differences in amylase activity (p<0.05). Our findings demonstrated that suruvi juveniles could be sustainably fed only once a day.

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Recruitment of migratory fish in free‐flowing rivers with limited floodplain development

Pachla

Hartmann

Massaro

et al. 2022

Aquatic Conservation

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1. Hydrological connectivity is a basic feature of river ecosystems, responsible for important ecological processes. Human activities, however, have progressively modified natural connectivity, threatening the maintenance of aquatic biodiversity.2. Neotropical potamodromous fish depend heavily on fluvial connectivity to complete their life cycles. However, important ecological aspects remain poorly understood, especially in river systems with limited floodplain development (i.e. channelized rivers and drylands), where the environment poses constraints to fish recruitment. The Uruguay River Basin is such a system, with several migratory fish, small floodplain areas, and limited information about recruitment dynamics and nursery grounds. 3. The lack of information on critical habitats limits conservation and management actions, especially in scenarios of increasing environmental degradation and river regulation. This study investigated recruitment dynamics of migratory fishes in the Middle Uruguay River, a long fluvial segment targeted for hydropower development. The study investigated spatial variations in the abundance, composition and size structure of juvenile fish among different sites along an extensive fluvial gradient (ca. 650 km), comparing the main channel with tributaries.4. Juveniles of migratory fish were widely distributed in the region, totalling nine species, with a predominance of Characiformes. Spatial distribution was variable among species and size classes, with a differential use of tributaries, wetlands and the main channel. Juvenile composition differed between sampling sites and environments, and was correlated with different limnological and spatial variables.Greater abundances occurred in the mouth of a tributary where a small floodplain develops during the wet season.5. The results emphasize the importance of fluvial connectivity for fish migration, dispersal and recruitment, providing valuable information about migratory fishes in river systems with limited wetland development. These findings have significance for the management and conservation of migratory fish under scenarios of hydropower expansion, as comprehensive studies on recruitment are rare in free-flowing rivers.

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Photoperiod influence on the cultivation of Steindachneridion scriptum (Pisces, Pimelodidae) juvenile

Abstract: ABSTRACT

Cited by 7 publications

References 20 publications

Embryonic development and larval stages of Steindachneridion parahybae (Siluriformes: Pimelodidae): implications for the conservation and rearing of this endangered Neotropical species

Embryonic development and larval stages of Steindachneridion parahybae (Siluriformes: Pimelodidae): implications for the conservation and rearing of this endangered Neotropical species

FREQUíÅ NCIA ALIMENTAR NA CRIAÇÃO DE JUVENIS DE SURUVI <i>Steindachneridion scriptum</i>

Recruitment of migratory fish in free‐flowing rivers with limited floodplain development

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Photoperiod influence on the cultivation of Steindachneridion scriptum (Pisces, Pimelodidae) juvenile

Abstract: ABSTRACT

Cited by 7 publications

References 20 publications

Embryonic development and larval stages of Steindachneridion parahybae (Siluriformes: Pimelodidae): implications for the conservation and rearing of this endangered Neotropical species

Embryonic development and larval stages of Steindachneridion parahybae (Siluriformes: Pimelodidae): implications for the conservation and rearing of this endangered Neotropical species

FREQUí­Å NCIA ALIMENTAR NA CRIAÇÃO DE JUVENIS DE SURUVI <i>Steindachneridion scriptum</i>

Recruitment of migratory fish in free‐flowing rivers with limited floodplain development

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Product

Resources

About

FREQUíÅ NCIA ALIMENTAR NA CRIAÇÃO DE JUVENIS DE SURUVI <i>Steindachneridion scriptum</i>