Intralacustrine movements of Galaxias maculatus (Galaxiidae) and Ondontesthes microlepidotus (Atherinidae) during their early life history

Cussac, Víctor E.; Cervellini, Patricia Marta; Battini, Miguel Ángel

doi:10.1007/bf00002189

Cited by 56 publications

(66 citation statements)

References 25 publications

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“…The length of newly mature females and males, indicates G. maculatus matures at 1 year of age. The large number of mature G. maculatus captured in the littoral zone and at a depth of 10 m suggests, in agreement with Cussac et al (1992) and Battini (1997), that it uses the shallower zones of the lake as a spawning area. The absence of captures in the baited traps 1 m deep during the 2000 spawning season cannot be assigned to a non-feeding condition of mature fish, because most of them (captured with seine net) had food in their guts.…”

Section: Discussionsupporting

confidence: 84%

“…In the Andes, their ontogenetic habitat shifts have only been studied in a very small, shallow lake (6 ha surface area, 3 m max. depth) (Cussac et al 1992). G. maculatus movements and ontogenetic diet shifts (Cervellini et al 1993) are similar to those observed for Galaxias gracilis by Rowe & Chisnall (1996).…”

Section: Introductionsupporting

confidence: 69%

“…Then they were covered with a drop of polystyrene solution, following Pannella (1971), Geffen (1987), and Battini et al (1995). We recorded the diameter (OD) containing the escisura, the diameter perpendicular to the escisura, and the number of growth rings, counted under optic microscope (lOOOx) following Cussac et al (1992) and Battini et al (1995).…”

Section: Early Lifementioning

confidence: 99%

“…Then, as they develop into juveniles, pigmentation develops rapidly, head length increases, and a pouch-like stomach develops (McDowall 1968). Larvae of landlocked G. maculatus forms are smaller than their marine counterparts (Ringuelet et al 1967;Benzie 1968;McDowall 1968McDowall , 1971Pollard 1971;Campos 1974;Cussac et al 1992;Cervellini et al 1993). In the Andes, their ontogenetic habitat shifts have only been studied in a very small, shallow lake (6 ha surface area, 3 m max.…”

Section: Introductionmentioning

confidence: 99%

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Spatial and temporal distribution of landlockedGalaxias maculatusandGalaxias platei(Pisces: Galaxiidae) in a lake in the South American Andes

Barriga¹,

Battini²,

Macchi³

et al. 2002

New Zealand Journal of Marine and Freshwater Research

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127

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Galaxiids are present in many of the Andean lakes in southern South America. We studied landlocked Galaxias maculatus (Jenyns) and Galaxias platei Steindachner populations in a deep oligotrophic lake (Lake Gutiérrez, Patagonia, Argentina). Their temporal and spatial distribution, intralacustrine movements (horizontal and vertical), and spawning periods were analysed using several sampling techniques (ichthyoplankton net, seine net, gill net, and baited benthic taps). We identified the early life stages of both species based on their morphology and otolith shape. The free embryos of both species migrate to the limnetic zone, where they coexist as larvae, facing the same food availability and probably the same predation risk. Each species then moves on to its own juvenile and adult habitat: the littoral and benthic zone for G. maculatus and only the deeper benthic zone for G. platei. Their adult habitats and part of their spawning periods partly overlap.

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Section: Discussionsupporting

confidence: 84%

Section: Introductionsupporting

confidence: 69%

Section: Early Lifementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spatial and temporal distribution of landlockedGalaxias maculatusandGalaxias platei(Pisces: Galaxiidae) in a lake in the South American Andes

Barriga¹,

Battini²,

Macchi³

et al. 2002

New Zealand Journal of Marine and Freshwater Research

Self Cite

127

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“…In temperate regions, mean air and water temperatures are likely to correspond most closely in midsummer (Livingstone & Lotter, 1998). Odontesthes hatcheri breed in late spring to early summer (Cussac et al, 1992) and O. bonariensis in spring and autumn . As Cussac et al (2009) have already suggested, the results of this survey (Ameghino reservoir being the southernmost locality) confirm that O. bonariensis is absent when mean summer air temperatures are lower than 20ºC (www.smn.…”

Section: Discussionmentioning

confidence: 99%

Populations of Odontesthes (Teleostei: Atheriniformes) in the Andean region of Southern South America: body shape and hybrid individuals

et al. 2015

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The original distribution area of the Patagonian 'pejerrey' Odontesthes hatcheri has been subjected to the introduction of a related species; the Bonaerensean 'pejerrey' Odontesthes bonariensis. This species currently coexists with O. hatcheri in lakes and reservoirs, and can interbreed and produce fertile hybrid offspring. The purposes of this study were; a) the extensive sampling of Patagonian and Andean-Cuyan populations of pejerrey, b) the species identification according to taxonomic key, c) validation of taxonomic results on the basis of mitochondrial DNA composition, and d) applying morphometric analysis to explore the effects of hybridization and environmental conditions on body shape. Cytochrome b sequence analysis showed a high degree of genetic divergence between species and low intraspecific variation in O. hatcheri. Geometric Morphometric Analyses detected shape differences in agreement with diagnostic characteristics of each species. Putative hybrids exhibiting intermediate diagnostic characteristics were identified by Geometric Morphometric Analysis. Significant regressions between body shape and total phosphorus and altitude were found, suggesting a dependence on trophic web structure. This multi-level approach suggests the introgression of O. bonariensis into several O. hatcheri populations throughout Patagonia. Managers should take this into account when considering further exotic introductions into regions where non-native fishes have not yet become established.La distribución original del 'pejerrey' patagónico Odontesthes hatcheri ha sido sometida en las últimas décadas a la introducción de una especie relacionada; el 'pejerrey' Bonaerense Odontesthes bonariensis. Ambas especies coexisten actualmente en algunos lagos y embalses debido a prácticas de siembra y pueden cruzarse y producir progenie híbrida y fértil. Los propósitos de este estudio fueron a) un amplio muestreo de las poblaciones patagónicas y andino-cuyanas del pejerrey, b) la identificación de las especies de acuerdo con la clave taxonómica, c) la validación de los resultados taxonómicos sobre la base de la composición del ADN mitocondrial y d) aplicar el análisis morfométrico para explorar los efectos de la hibridización y las condiciones ambientales sobre la forma corporal. El análisis de la secuencia del Citocromo b mostró un alto grado de divergencia genética entre ambas especies y una muy baja variación intraespecífica en O. hatcheri. El análisis de la Morfometría Geométrica detectó diferencias de forma coincidentes con las características diagnósticas de cada especie. Presuntos híbridos exhibiendo características diagnósticas intermedias fueron identificados por el análisis de la Morfometría Geométrica. Regresiones significativas entre la forma corporal y la concentración total de fósforo y la altitud fueron halladas, sugiriendo una dependencia con la estructura de la trama trófica. Este enfoque múltiple sugiere la introgresión de genes de O. bonariensis dentro de varias poblaciones de O. hatcheri a lo largo de la Patagonia....

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Fish and Fisheries of the Patagonian Steppe

Baigún

Casalinuovo²,

Quiroga

et al. 2022

Natural and Social Sciences of Patagonia

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Intralacustrine movements of Galaxias maculatus (Galaxiidae) and Ondontesthes microlepidotus (Atherinidae) during their early life history

Cited by 56 publications

References 25 publications

Spatial and temporal distribution of landlockedGalaxias maculatusandGalaxias platei(Pisces: Galaxiidae) in a lake in the South American Andes

Spatial and temporal distribution of landlockedGalaxias maculatusandGalaxias platei(Pisces: Galaxiidae) in a lake in the South American Andes

Populations of Odontesthes (Teleostei: Atheriniformes) in the Andean region of Southern South America: body shape and hybrid individuals

Fish and Fisheries of the Patagonian Steppe

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