Reproductive characteristics of pike‐characids <i>Boulengerella cuvieri</i> (Ctenoluciidae) in the middle Xingu River, Eastern Amazon

Mendes, Yanne A.; Ferreira, María Auxiliadora Pantoja; Lobato, Cleonice Maria Cardoso; Silva, G. M. F.; Montag, Luciano Fogaça de Assis; Rocha, Rossineide Martins da

doi:10.1111/jfb.13339

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…This reproductive strategy seems to be not a rare condition among the Amazonian fish species. Cordeiro et al (2020) and Mendes et al (2017), for example, described mature specimens of Astyanax bimaculatus and Boulengerella cuvieri, along the entire sampling year in Amazonian rivers. Copella arnoldi males also presented a rare type of semicystic spermatogenesis and the Type I spermiogenesis.…”

Section: Discussionmentioning

confidence: 99%

Reproductive biology of the Amazonian amphibian fish the splash tetra Copella arnoldi with emphasis to histological characterization

et al. 2022

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This study describes important components of the reproductive biology of the Amazonian amphibian fish Copella arnoldi. The species sex ratio biased to female 1.8 to 1 male and the length‐weight relationship also shown differences between sexes (b value = 1.854 for females and 2.235 for males), although both presented allometric growth (b < 3), “being lighter for its length”. The results also show the importance of the histological analysis to describe the gametogenesis and, consequently, define the reproductive cycle of a fish species. It showed both, males and females, spawning capable during a whole year, whereas the gonadosomatic index pointed spawning capable females during the winter and summer, and spawning capable males only in the autumn. The species presents the rare type of semicystic spermatogenesis and the spermatids complete their differentiation into the tubular lumen, forming a Type I spermatozoa. Both the characteristics are described for the first time for the Lebiasinidae family. Such data can contribute to the discussions about the position of the Lebiasinidae family within the Characiform order, which still does not have a conclusion. Moreover, understand the reproductive biology of a fish species helps its preservation in its habitat and may be applied in restoration programs.

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Section: Discussionmentioning

confidence: 99%

Reproductive biology of the Amazonian amphibian fish the splash tetra Copella arnoldi with emphasis to histological characterization

et al. 2022

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“…Females predominated in the M. amazonicum populations in both environments through almost the entire study period. A female-biased sex ratio is common in crustaceans, given the importance of females for the recruitment process, especially in populations that breed continuously (Ayres-Santos, Freitas, & Montag, 2018;Castelo-Branco, Batista, Guerra, Soares, & Peixoto, 2015;Mendes et al, 2017;Mossolin & Bueno, 2002;Sampaio, Silva, Santos, & Sales, 2007). Even so, the males were larger than the females, which may reflect dominance behavior and territoriality, which favor larger individuals (Magalhães, Mossolin, & Mantelatto, 2012;Silva, Frédou, & Filho, 2007).…”

Section: Ta B L Ementioning

confidence: 99%

Has a river dam affected the life‐history traits of a freshwater prawn?

Silva

Andrade²,

Silva

et al. 2020

Ecology and Evolution

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In recent years, species richness and diversity in aquatic ecosystems has declined as environments are increasingly impacted by anthropic actions. Freshwater prawns are well adapted to survive in a disturbed and heterogeneous environment. For instance, Amazon river prawn (Macrobrachium amazonicum) populations vary in migratory behavior between rivers and estuaries, depending on factors such as dams. However, there is limited information on the influence of environmental conditions on life‐history traits of this species, which we investigate here using two distinct and unconnected aquatic systems, a dammed river and an estuary, in the eastern Brazilian Amazon. The biological characteristics of M. amazonicum populations in the two environments were compared and related to environmental parameters, which differed significant differences between the two environments and between seasons. Dissolved oxygen, precipitation, and temperature varied most significantly with the seasons in both the estuary and river. M. amazonicum prawns in the estuary were larger and heavier than those in the river during rainy periods. The mass–length ratios and condition factor varied significantly between the M. amazonicum populations in the estuary and river, with negative allometric growth (grows faster in length than in weight) predominating in both populations, and condition factor was better in the estuary for males and in the river for females. The relative frequencies of occurrence of the different female maturation stages and the male morphotypes were related to precipitation and turbidity in both environments and also to salinity in the estuary. In these two distinct aquatic systems, the abiotic parameters determined by the seasonal precipitation cycle profoundly influenced the development of this crustacean, despite its ecological plasticity. Overall, the study showed that river damming triggered environmental changes in the freshwater river ecosystem and played a key role in determining the life‐history characteristics of M. amazonicum in these contrasting aquatic systems.

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Sedentary fish as indicators of changes in the river flow rate after impoundment

Mendes

Oliveira

Montag

et al. 2021

Ecological Indicators

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Reproductive characteristics of pike‐characids Boulengerella cuvieri (Ctenoluciidae) in the middle Xingu River, Eastern Amazon

Cited by 4 publications

References 22 publications

Reproductive biology of the Amazonian amphibian fish the splash tetra Copella arnoldi with emphasis to histological characterization

Reproductive biology of the Amazonian amphibian fish the splash tetra Copella arnoldi with emphasis to histological characterization

Has a river dam affected the life‐history traits of a freshwater prawn?

Sedentary fish as indicators of changes in the river flow rate after impoundment

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