Discovery of the Critically Endangered annual killifish Austrolebias wolterstorffi (Ahl, 1924) (Cyprinodontiformes: Rivulidae) in Lagoa do Peixe National Park, Rio Grande do Sul, southern Brazil

Lanés, Luis Esteban Krause; Maltchik, Leonardo

doi:10.11609/jott.o2499.1282-5

Cited by 12 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…LPNP is located in the middle section of the external coastal plain of Rio Grande do Sul, southern Brazil (31° 02′–31° 48′ S; 50° 77′–51° 15′ W). This region supports high biological diversity and a high concentration of wetlands (Lanés & Maltchik, ; Maltchik et al , ). The LPNP covers c .…”

Section: Methodsmentioning

confidence: 82%

Seasonal dynamics in community structure, abundance, body size and sex ratio in two species of Neotropical annual fishes

Lanés

Godoy

Maltchik

et al. 2016

Journal of Fish Biology

Self Cite

View full text Add to dashboard Cite

Seven ephemeral pools on the coastal plain of southern Brazil were found to be inhabited by three annual and 22 non-annual fish species. Two common annual species (Austrolebias minuano and Cynopoecilus fulgens) exhibited clear seasonal dynamics, with the appearance of young fishes in the austral autumn (May to June) and a decline in abundance over the seasonal cycle. The third annual species, Austrolebias wolterstorffii, was rare. No seasonal dynamics were observed in non-annual fishes. The relative abundance of non-annual fishes compared with annual fishes increased over the seasonal cycle, but they coexisted widely. The size structure of annual fishes suggested the presence of a single age cohort in most pools though a second age cohort was registered in one pool in August, coinciding with a large flooding. Strong sexual dimorphism in body size was found in C. fulgens throughout the seasonal cycle, while no sexual dimorphism in body size was found in A. minuano. Female-biased sex ratios were recorded in both common annual fish species in the last three sampling dates (in spring), but not during the first two sampling dates (in winter). The natural lifespan of annual fishes was <8 months. Annual fishes disappeared before habitat desiccation in half of the pools, while non-annual fishes were still present.

show abstract

Section: Methodsmentioning

confidence: 82%

Seasonal dynamics in community structure, abundance, body size and sex ratio in two species of Neotropical annual fishes

Lanés

Godoy

Maltchik

et al. 2016

Journal of Fish Biology

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although the Jaguarão River Basin has priority areas for biodiversity conservation (MMA, ), there is no officially protected area. In addition, the wetlands are considered to be a highly degraded ecosystem of southern Brazil, and the remaining areas are at increasing risk of extinction due to the expansion of agriculture and exotic forests (Lanés and Maltchik, ; Maltchik et al., ; Volcan et al., ). In this sense, understanding the geographical distribution is essential to promote strategies and select priority areas for conservation of these ecosystems and their endemic and susceptible species, many of which are globally (Reis and Lima, ; Loureiro et al., ; Volcan et al., , ), nationally (Rosa and Lima, ) and regionally threatened (Reis et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…In the state of Rio Grande do Sul, Austrolebias species are among those highly endangered species, corresponding to 39% of freshwater fish at risk (Reis et al, 2003b), mainly because of their endemism and restriction to temporary natural wetlands, which are increasingly used for anthropogenic activities (Costa, 2002;Reis et al, 2003b). Conservative data indicate that about 90% of the wetlands in southern Brazil have disappeared (Maltchik et al, 2010) due to agricultural expansion, particularly rice plantations (Gomes and Magalha˜es, 2004).…”

Section: Introductionmentioning

confidence: 99%

Austrolebias arachanLoureiro, Azpelicueta & García 2004 (Cyprinodonfiformes: Rivulidae) in Rio Grande do Sul, Brazil: occurrence, length-weight relationships and condition factor

Lanés¹,

Gonçalves²,

Volcan³

2012

Journal of Applied Ichthyology

View full text Add to dashboard Cite

“…Moreover, ecological studies carried out in their natural habitats and based on temporal series are scarce (Arenzon et al 2001;Laufer et al 2009;Lanés 2011). In this sense, such ecological studies are essential to support conservation efforts (Lanés & Maltchik 2010). Our study reported the feeding habits of Cynopoecilus fulgens to improve knowledge of the biological and ecological traits of annual killifishes in Southern Brazil wetlands, where more than 90% of the original wetlands have been lost due to agricultural expansion (Maltchik et al 2010a).…”

Section: Conclusion and Conservation Implicationsmentioning

confidence: 99%

The diet ofCynopoecilus fulgensCosta, 2002 (Cyprinodontiformes: Rivulidae) in Southern Brazil wetlands

Keppeler

Lanés

Rolon

et al. 2013

Italian Journal of Zoology

Self Cite

View full text Add to dashboard Cite

Studies with annual fish diet have shown that the generalist habit is a dominant strategy within this group. Cynopoecilus fulgens (Cyprinodontiformes: Rivulidae) is a restricted range species, endemic to a small area in Southern Brazil, and aspects of its biology and ecology are poorly known. The main goal of the study was to determine the diet of C. fulgens throughout its life cycle and compare it with the prey availability in Southern Brazil wetlands. Specifically, we analyzed samples collected in different stages of ontogenetic development (immature and adult fishes) in various year seasons. A total of 52 food items were found in the diet of C. fulgens, and invertebrates comprised 96.4% of the counts observed. The richness of consumed and available prey changed along with the seasons. The seasonal variation of the consumed prey richness was mainly related to increase in fish size along the annual cycle. Microcrustaceans represented 75.6%, 80.9%, and 68.4% of the consumed prey in autumn, winter and spring, respectively. Prey composition varied with the seasons and it was not correlated to prey availability. Diet selectivity was different among male, female and immature fish. Our study reported the feeding habits of Cynopoecilus fulgens to improve knowledge of the biological and ecological traits of annual killifishes in Southern Brazil wetlands, where more than 90% of the original wetlands have been lost due to agricultural expansion.

show abstract

Discovery of the Critically Endangered annual killifish Austrolebias wolterstorffi (Ahl, 1924) (Cyprinodontiformes: Rivulidae) in Lagoa do Peixe National Park, Rio Grande do Sul, southern Brazil

Cited by 12 publications

References 11 publications

Seasonal dynamics in community structure, abundance, body size and sex ratio in two species of Neotropical annual fishes

Seasonal dynamics in community structure, abundance, body size and sex ratio in two species of Neotropical annual fishes

Austrolebias arachanLoureiro, Azpelicueta & García 2004 (Cyprinodonfiformes: Rivulidae) in Rio Grande do Sul, Brazil: occurrence, length-weight relationships and condition factor

The diet ofCynopoecilus fulgensCosta, 2002 (Cyprinodontiformes: Rivulidae) in Southern Brazil wetlands

Contact Info

Product

Resources

About