Ichthyoplankton studies as referential for the management and monitoring of fishery resources in the Brazilian Amazon basin

Zacardi, Diego Maia; Santos, Joyce Andreia dos; Oliveira, Lucas Silva de; Cajado, Ruineris Almada

doi:10.1590/s2179-975x6619

Cited by 14 publications

(19 citation statements)

References 38 publications

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“…However, work on describing the early stages of the fish life cycle has grown in this region (Machado‐Allison et al., 2020; Nakatani et al., 2001; Orsi et al., 2016; Ponton & Mérigoux, 2001). In Brazil, studies of this nature they can be considered incipient, as they encompass approximately 4% of valid species, and are often incomplete and/or do not include details of the different stages of development (Orsi et al., 2016; Reynalte‐Tataje et al., 2020; Zacardi, Santos, et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

Early development of the Neotropical fish known as long sardine Triportheus auritus (Valenciennes 1850) (Characiformes, Triportheidae)

et al. 2021

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Larvae and juveniles of long sardine, Triportheus auritus, from the lower Amazon river was described, evaluating ontogenetic changes in their external morphology, pigmentation, fin development, morphometry, and meristics. A total of 93 individuals, 83 larvae and 10 juveniles were analyzed, they were captured monthly between 2014 and 2019 in the Amazon river channel and in macrophytes aquatic stands in the alluvial plains located in the lower Amazon River. From each specimen, morphometric and meristic data were measured and then the growth pattern between morphometric variables was analyzed. The larvae have an elongated body in a fusiform shape, superior mouth, simple nostril, pigmented spherical eyes and long intestine, surpassing the median region of the body. Initial pigmentation is scarce, but intensifies through development forming a pattern composed of three longitudinal bands concentrated in the ventral, cephalo‐dorsal and lateral line regions. There are also pigments in the mandible, surrounding the mouth, under the swim bladder, intestine and fins. The sequence of complete fin formation is: caudal, anal, dorsal, pectoral and pelvic. The total number of myomeres ranged from 45 to 48 (25–29 preanal and 17–22 postanal). Morphometric relationships indicated differential growth for measurable morphometric parameters, with abrupt growth of snout length, head length and body height in the transition from flexion to postflexion stages. The pre‐dorsal distance showed a decrease in the growth rate at the threshold from the larval to the juvenile period. The pre‐pectoral and pre‐anal distances showed negative allometric growth. In conclusion, the combination of body shape pigmentation pattern and, the formation sequence of fins allow the identification of the genus and coupled with the number of myomeres, morphometric relationships, and ray numbers of the anal fin ensure the differentiation of T. auritus from the other congeneric species. The metamorphosis occurred mainly at the end of the larval period and it is related to changes in the physiological and ecomorphological characteristics of the species.

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Section: Introductionmentioning

confidence: 99%

Early development of the Neotropical fish known as long sardine Triportheus auritus (Valenciennes 1850) (Characiformes, Triportheidae)

et al. 2021

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“…Accordingly, conservation of fish eggs and larvae is fundamental for the maintenance of fishery resources. In a paper focused on the Brazilian Amazon, Zacardi et al (2020) review the current knowledge on the ecology of early life stages of Amazon fish, discussing how increasing knowledge of ichthyoplankton ecology can support management strategies aimed at mitigating disturbances across the basin.…”

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confidence: 99%

Editorial: Freshwater sustainability and aquatic ecology in a fast-changing world

et al. 2020

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“…However, many studies of this nature address only larval and juvenile development. Precisely because most studies are carried out with specimens collected in natural environments, whose identification of eggs at species or even genus level becomes an arduous and often impossible task without the use of genetics, due to the intense interspecific similarity between freshwater fish eggs, especially migratory (Reynalte‐Tataje et al, 2020; Zacardi et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…The absence of studies of this nature is associated with the lack of literature that helps the correct identification of fish eggs and larvae in the natural environment (Reynalte‐Tataje et al, 2020). It is emphasized that although the Amazon region has the greatest fish biodiversity in the world, there are still few studies that address the description of the early ontogeny of fish species (Zacardi et al, 2020). However, knowledge of larval phases is pivotal to assist in the management and conservation of tropical fishery stocks (Cajado et al, 2021; Oliveira et al, 2021; Silva et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Early development ofProchilodus nigricansSpix & Agassiz 1829 (Characiformes: Prochilodontidae) in captivity

Silva

Cajado

Oliveira

et al. 2022

Aquaculture Research

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The initial ontogeny of black prochilodus (Prochilodus nigricans Spix & Agassiz 1829) was described through morphological, meristic and morphometric characters. The biological material used was from captivity. 41 eggs, 151 larvae and 10 juveniles were analysed. The eggs were spherical, transparent, nonadhesive and pelagic, with a wide perivitelline space and an average diameter of 2.62 mm. Hatching occurs between 17 and 18 h after fertilization. The standard length of larvae varied from 3.28 to 26.73 mm and that of juveniles from 28.99 to 42.90 mm. The larvae showed an elongated and fusiform body, a convex dorsal profile, a long intestine, extending beyond the median region of the body, a terminal mouth and fleshy lips. The complete sequence of fin rays formation was caudal, dorsal (I,11), anal (I,11), pelvic (9) and pectoral (I,16–17). The number of myomeres ranged from 44 to 46, with mode 45 (n = 122). Growth analyses indicated early and late developmental metamorphosis. P. nigricans presents embryonic and larval development characteristic of fish with telolecithal eggs, in which the newly hatched larva does not yet have all the organic systems fully formed, is limited to a few organs and is still dependent on the yolk for its nutrition.

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Ichthyoplankton studies as referential for the management and monitoring of fishery resources in the Brazilian Amazon basin

Cited by 14 publications

References 38 publications

Early development of the Neotropical fish known as long sardine Triportheus auritus (Valenciennes 1850) (Characiformes, Triportheidae)

Early development of the Neotropical fish known as long sardine Triportheus auritus (Valenciennes 1850) (Characiformes, Triportheidae)

Editorial: Freshwater sustainability and aquatic ecology in a fast-changing world

Early development ofProchilodus nigricansSpix & Agassiz 1829 (Characiformes: Prochilodontidae) in captivity

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