Short‐lived fishes: Annual and multivoltine strategies

Žák, Jakub; Vrtílek, Milan; Polačik, Matěj; Blažek, Radim; Reichard, Martin

doi:10.1111/faf.12535

Cited by 8 publications

(2 citation statements)

References 115 publications

(218 reference statements)

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“…Assuming that both estimates are consistent, the generation time of M. rubescens is estimated to be approximately 0.3 years (approximately 4 months) (Table 3). This value is within the expected range of generation times for small cyprinid fishes (2-12 months, e.g., Lawrence et al, 2012;Nakajima and Onikura, 2009;Onikura et al, 2009;Žák et al, 2021). Although uncertainties remain regarding molecular evolutionary rates and generation times of M. rubescens, consistent results from different approaches support the validity of the inferred population differentiation timescales dating to the early Pleistocene.…”

Section: Inlecypris Auropurpureussupporting

confidence: 78%

Cryptic genetic divergence of the red dwarf rasbora,Microrasbora rubescens, in and around Inle Lake: implications for the origin of endemicity in the ancient lake in Myanmar

Fuke

Kano

Tun

et al. 2022

Journal of Fish Biology

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Inle Lake, an ancient lake located in the Shan Plateau of Myanmar, is a biogeographically attractive region with high fish endemism. Some endemic species inhabit the lake as well as the surrounding areas. The genetic and ecological relationships between populations in the lake and surrounding areas provide important insights into the process underlying ichthyofaunal formation in Inle Lake. In this study, the authors focused on red dwarf rasbora Microrasbora rubescens, an endemic genus and species in this region, and estimated its population structure and evolutionary scenario based on genome-wide polymorphism, mtDNA and geometric morphometric analyses using samples from Inle Lake and three areas surrounding the lake. The results showed that M. rubescens comprises at least three genetically divergent lineages (Inle, Heho and Hopong) with distinct geographic structures consistent with nuclear and mtDNA data.In contrast, there was no clear regional differentiation in morphology. The divergence time estimation based on mtDNA suggests that the Hopong lineage diverged at 2.7 Ma and the Inle and Heho lineages diverged at 1.9 Maconsistent with the nuclear DNA results. The deep divergence observed in the endemic species supports the ancient history of ichthyofaunal development in this region. The distinct regional differentiation and morphological conservatism of this species might have been shaped by niche conservatism in stagnant water environments that limit dispersal and morphological diversification. Future comprehensive genetic and morphological analyses and comparisons for other native species should reveal the geographic and ecological processes that shaped the ichthyofauna in this region.

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Section: Inlecypris Auropurpureussupporting

confidence: 78%

Cryptic genetic divergence of the red dwarf rasbora,Microrasbora rubescens, in and around Inle Lake: implications for the origin of endemicity in the ancient lake in Myanmar

Fuke

Kano

Tun

et al. 2022

Journal of Fish Biology

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“…Precision is necessary for the amount and timing of harvest for short-lived species with essentially a single age or size class, e.g., small-bodied fish, some crabs, many shrimp, and many cephalopods (Robert et al, 2010;Arkhipkin et al, 2015;Sauer et al, 2021;Žák et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Examining the performance of alternative harvest regulations for short-lived taxa: A case study of Florida Bay scallop management

et al. 2023

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Reproductive Strategy of the Annual Fish Leptopanchax Opalescens (Rivulidae) and Trade-Off Between Egg Size and Maximum Body Length in Temporary Wetlands

et al. 2023

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Leptopanchax opalescens is a critically endangered small annual sh. Reproductive traits of this species were studied to improve our understanding of the strategies that facilitate the occupation of temporary wetlands. We compiled egg diameter and maximum total length (TLmax) data from 132 neotropical freshwater sh (83 genera, 43 families) to establish comparisons with this species. We used the egg diameter / TLmax ratio to test the hypothesis that annual sh in temporary wetlands have relatively larger eggs than non-annual species from perennial habitats (lakes, rivers). Fish were collected from Guandu River drainages (Brazil). DNA barcoding was employed to con rm the species identity. The phases of gonadal development and spawn type were described using histological techniques. Egg size and fecundity were determined with microscopic analysis. Females with batch spawning and males with continuous spawning were detected. The bath fecundity ranged from 22-32 vitellogenic oocytes (mean 27 ± 7 SD). Annual species presented greater relative egg size than perennial species (p < 0.001), which is an indication of greater reproductive investment at the expense of somatic growth in temporary wetlands. Larger eggs are advantageous for annual sh as their lifespan is limited, and they can allocate a greater amount of yolk reserves for long periods buried in the substrate under embryonic diapause. Large relative oocytes, spawning in batches, synchronous modal development of oocytes, continued production of sperm in males, and a complex process of embryonic diapause are reproductive traits that favor resilience of L. opalescens and other annual sh in temporary wetlands. IntroductionRivulidae (Cyprinodontiformes) is the eighth most speciose sh family in the World, with 471 valid species (Fricke et al. 2022), and the rst in number of threatened species in the Neotropical Region, where they occur. The threat is such that in a megadiverse country like Brazil, a single family of freshwater sh (i.e., Rivulidae) has a higher number of threatened species (130 spp.) than all classes of marine sh combined (Actinopterygii + Chondrichthyes + Myxini = 97 spp.) (ICMBio 2018). Habitat loss is the main threat to rivulids. The swamps and temporary wetlands where many of these animals inhabit have been drastically destroyed, due to deforestation, drainage and land lling resulting from agricultural and urban expansion (Loureiro et al. 2018;Castro and Polaz 2020). Loss of temporary wetlands from land alterations has signi cant ecological and social consequences (Calhoun et al. 2017), but freshwater research, policy, and conservation have historically neglected these habitats, focusing instead on larger water bodies and agship species (

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Short‐lived fishes: Annual and multivoltine strategies

Cited by 8 publications

References 115 publications

Cryptic genetic divergence of the red dwarf rasbora,Microrasbora rubescens, in and around Inle Lake: implications for the origin of endemicity in the ancient lake in Myanmar

Cryptic genetic divergence of the red dwarf rasbora,Microrasbora rubescens, in and around Inle Lake: implications for the origin of endemicity in the ancient lake in Myanmar

Examining the performance of alternative harvest regulations for short-lived taxa: A case study of Florida Bay scallop management

Reproductive Strategy of the Annual Fish Leptopanchax Opalescens (Rivulidae) and Trade-Off Between Egg Size and Maximum Body Length in Temporary Wetlands

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