Seasonal Specialization and Selectivity of the Eastern Mosquitofish,<i>Gambusia holbrooki</i>, Toward Planktonic Prey

Dirnberger, Joseph M.; Love, Julia

doi:10.1656/058.015.0115

Cited by 6 publications

(2 citation statements)

References 43 publications

(56 reference statements)

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“…The negative impacts of G. holbrooki on native biota have led the species to be listed among the 100 most invasive species worldwide (Lowe et al, 2000). Their high reproductive potential, high dispersal capabilities, ability to live in a broad array of habitats and withstand adverse conditions such as extreme temperatures and salinities, and their broad diet have been proposed as the main factors promoting their colonization and establishment (Dirnberger & Love, 2016;Pyke, 2005).…”

Section: Introductionmentioning

confidence: 99%

Comparative gut content analysis of invasive mosquitofish from Italy and Spain

Pirroni

Dezen

Santi

et al. 2021

Ecology and Evolution

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Section: Introductionmentioning

confidence: 99%

Comparative gut content analysis of invasive mosquitofish from Italy and Spain

Pirroni

Dezen

Santi

et al. 2021

Ecology and Evolution

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“…These size‐specific reductions of prey taxa probably reflect the fact that Gambusia affinis is a gape‐limited predator (Henkanaththegedara & Stockwell, 2013; Lee et al., 2018; Tsang & Dudgeon, 2021), such that larger invertebrates are less vulnerable to being eaten, although they could remain susceptible to mosquitofish attack (Acra et al., 1986; Capps et al., 2009). In addition to being small, the high susceptibility of cyclopoid copepods observed in the present study might also have been related to their high abundance (55% of individuals in cages), as mosquitofish tends to reduce the abundance of dominant species (Preston et al., 2017), shifting its diet according to the relative abundance of prey (Dirnberger & Love, 2016; Mieiro et al., 2001; Singh & Gupta, 2010).…”

Section: Discussionmentioning

confidence: 78%

A manipulative field experiment reveals the ecological effects of invasive mosquitofish (Gambusia affinis) in a tropical wetland

Tsang

Dudgeon

2021

Freshwater Biology

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The mosquitofish (Gambusia affinis: Poeciliidae) is one of the world's most widespread invaders, but our ability to predict the consequences for native species in the tropics is limited by a paucity of research and a lack of knowledge of how environmental factors influence mosquitofish impacts. We undertook a field experiment using cages to manipulate mosquitofish densities in a Hong Kong wetland during the warm wet season and the cool dry season. We measured fish effects on invertebrates and periphyton, and tested whether the results were affected by vegetation type (sedge vs. water lily). Mosquitofish reduced abundance and richness of invertebrates, and altered assemblage composition, but had no effect on periphyton biomass. Effects on invertebrate abundance were consistent between seasons, but mosquitofish reduced invertebrate richness only during the wet season, when effects on assemblage composition were more obvious. Vegetation type had no influence on the experimental results. This study adds to the few tropical, or Asian, field studies of the ecological impacts of mosquitofish, and is, as far as we are aware, the only such study measuring their seasonal variability. While we detected some cage effects during our field experiment, they were insufficient to obscure the strong influence of mosquitofish on invertebrate abundance and composition.

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Growth and diet of the invasive mosquitofish Gambusia affinis in lotic and lentic habitats in Japan

Hashimoto,

Kaneko,

Chiba

2024

Biol Invasions

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To understand the success of non-native sh invasions, it is important to clarify their tolerance to habitat differences and their adaptations to these habitats with regard to feeding habits. In this study, the invasive characteristics of the non-native sh Gambusia a nis were examined in order to determine its growth and feeding habits in different habitats (lotic and lentic). Fish specimens were collected from October 2021 to November 2022 from the Nakaibori Stream (lotic) and from May to December 2022 from the Nagatsugawa Reservoir (lentic). Growth indices (total length: TL, eviscerated weight: EW, and condition factor: CF) for both habitats showed that TL and EW were signi cantly lower for lotic than for lentic habitats. However, the CF of the lotic habitat was higher than that of the lentic habitat. The vacuity index (VI) for the lotic habitat was more than ve times higher than that for the lentic habitat. The food range of G. a nis in the lentic habitat comprised 14 food items, which mainly included members of Diptera. However, in the lotic habitat, only eight of these were consumed, with members of Formicidae being the most common, followed by plants (mostly lamentous algae). Zooplankton were not consumed in the lotic habitat. Both the lotic and lentic habitats had relatively low niche breadths (0.39). The feeding strategy of G. a nis was determined to be closely related to changes in habitat prey assemblages and possibly indicates competition for food with native sh species.

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Seasonal Specialization and Selectivity of the Eastern Mosquitofish,Gambusia holbrooki, Toward Planktonic Prey

Cited by 6 publications

References 43 publications

Comparative gut content analysis of invasive mosquitofish from Italy and Spain

Comparative gut content analysis of invasive mosquitofish from Italy and Spain

A manipulative field experiment reveals the ecological effects of invasive mosquitofish (Gambusia affinis) in a tropical wetland

Growth and diet of the invasive mosquitofish Gambusia affinis in lotic and lentic habitats in Japan

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