Conservation Strategies in the South American Annual Killifish of the Austrolebias sensu lato Linked to the Riparian Wetlands Zones

Aquatic Conservation Marine and Freshwater Ecosystems, Journal Year: 2025, Volume and Issue: 35(4)

Published: April 1, 2025

ABSTRACT The South American annual killifish of the Austrolebias sensu lato constitute an extensive species group and serve as a remarkable evolutionary model, inhabiting riparian wetlands in La Plata River grasslands. This region contains three major areas with allopatrically distributed local regional endemic assemblages. At present, IUCN Red List includes nearly 75% genus group. A synapomorphic characteristic this is their expanded genome size. Vicariance/dispersal secondary contact have played key roles diversification most genera within group, explaining current distribution across areas. Riparian are transitional zones that support exceptionally high levels biodiversity productivity. effective conservation these enhances connectivity between river corridors floodplains, linking aquatic wetland habitats where inhabit, while ensuring long‐term potential populations. Due to unique characteristics, could be umbrella species, providing benefits temperate regions grasslands, both biota integrity processes.

Language: Английский

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Hitting and Unhitting the Pause Button: Variable Hatching Patterns of Annual Killifish Embryos Over a Wetland Wet–Dry Cycle

Ecology Of Freshwater Fish, Journal Year: 2024, Volume and Issue: 34(1)

Published: Sept. 20, 2024

ABSTRACT Hatching dynamics is key to population structure of annual fishes in temporary wetlands. Given the risk false starts due unpredictable hydroperiods, fish may employ risk‐spreading strategies their hatching patterns consistent with bet hedging (such as partial egg bank and variable number cues) after being exposed floods. However, extent which resort (as well potential drivers) over a wet–dry cycle poorly understood. We assessed South American killifish ( Matilebias cyaneus ; Cyprinodontiformes: Rivulidae) collected at different hydrological phases wetland test for variation cycle. incubated wild eggs M . obtained from male–female pairings separately reared tanks originating ‘early‐wet’, ‘drying’ ‘late‐wet’ examined across sequence hydration trials under common‐garden conditions. found (i) hatched unhatched (ii) among clutches each phase (while controlling parentage). Our results show that variably commit bet‐hedging cycle, suggest environmental conditions specific periods year parental age are produced drive patterns.

Language: Английский

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Land cover is the main driver of the distribution patterns of larval Odonata assemblages in freshwater wetlands of the Brazilian Pampa

Ecological Research, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 6, 2024

Language: Английский

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The Campos Sulinos: Introduction to the Book

Springer eBooks, Journal Year: 2023, Volume and Issue: unknown, P. 3 - 13

Published: Dec. 15, 2023

Language: Английский

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