Nonmating behavioural differences between male tactics in the invasive round goby

Synyshyn, Caitlyn; Green-Pucella, Alexandra E.; Balshine, Sigal

doi:10.1016/j.anbehav.2021.09.007

Cited by 5 publications

(2 citation statements)

References 63 publications

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“…These ARTs have been studied in round goby in both fresh and brackish waters, e.g. Lake Ontario [41,42,44,45], the Rhine, Elbe and Danube rivers, and the Bay of Lübeck [46][47][48]. ARTs have also been investigated in many other gobies, including the common goby, Pomatoschistus microps [49], the black goby, Gobius niger [50] and the sand goby, Pomatoschistus minutus [51].…”

Section: The Round Gobymentioning

confidence: 99%

Modelling the impacts of male alternative reproductive tactics on population dynamics

Young,

Balshine,

Earn

2023

J. R. Soc. Interface.

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Observations of male alternative reproductive tactics (ARTs) in a variety of species have stimulated the development of mathematical models that can account for the evolution and stable coexistence of multiple male phenotypes. However, little attention has been given to the population dynamic consequences of ARTs. We present a population model that takes account of the existence of two male ARTs (guarders and sneakers), assuming that tactic frequencies are environmentally determined and tactic reproductive success depends on the densities of both types. The presence of sneakers typically increases overall population density. However, if sneakers comprise a sufficiently large proportion of the population—or, equivalently, if guarders are sufficiently rare—then it is possible for the total population to crash to extinction (in this extreme regime, there is also an Allee effect, i.e. a threshold density below which the population will go extinct). We apply the model to the example of the invasive round goby ( Neogobius melanostomus ). We argue that ARTs can dramatically influence population dynamics and suggest that considering such phenotypic plasticity in population models is potentially important, especially for species of conservation or commercial importance.

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Section: The Round Gobymentioning

confidence: 99%

Modelling the impacts of male alternative reproductive tactics on population dynamics

Young,

Balshine,

Earn

2023

J. R. Soc. Interface.

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“…ARTs are extremely common in some families of fish such as sunfishes and salmonids (Gross, 1984; Oliveira et al, 2008) and have also been reported in several members of the family Gobiidae, such as black goby, Gobius niger (Rasotto & Mazzoldi, 2002); common goby, Pomatoschistus microps (Magnhagen, 1992); sand goby, Pomatoschistus minutus (Svensson, 2004); grass goby, Zosterisessor ophiocephalus (Mazzoldi et al, 2000); and invasive round goby, Neogobius melanostomus (Bleeker et al, 2017; Marentette et al, 2009; McCallum et al, 2019). Because males adopting the different tactics may differ in their movement propensity, survivability, and reproductive success (Córdoba‐Aguilar & Munguía‐Steyer, 2015; Schulte‐Hostedde et al, 2002; Synyshyn et al, 2021), determining whether ARTs exist is important for understanding a species reproductive ecology and a species potential to be invasive.…”

Section: Introductionmentioning

confidence: 99%

Alternative reproductive tactics in goby fishes of the Caspian Sea

Zarini

Poli

Balshine

2023

Journal of Fish Biology

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Here we report on the reproductive morphology and histology of three gobiidae species (the Caspian monkey goby, Neogobius pallasi, the Caspian goby, Neogobius caspius and the round goby, Neogobius melanostomus) from the Iranian coastline of the Caspian Sea. Based on aging, reproductive histology, internal and external morphological measures, it appears that all three of these goby species have two types of reproductive males, a large courting, territorial, male type and a small cuckolding parasitic male type, a phenomenon known as alternative reproductive tactics (ARTs). Although ARTs have been reported previously for one of these species, the round goby, all reports stem from its invasive range; ARTs have never been reported before in any fish species in the Caspian Sea. In all three goby species there was a large, older male type, with a wide head, dark body colouration and a large investment in accessory glands, an organ important for female attraction and parental care. But there was also as a small, light, younger male type, with a narrow head, longer urogenital papilla and little investment in accessory glands. The Caspian monkey goby were the largest of the three species, and in this species the smaller, lighter, presumably cuckolding male morph was quite rare (only ~5% of the reproductive male population). In contrast, many of the round goby and monkey goby males were the small, lighter parasitic type, making up nearly half the population of reproductive males (48% and 40% respectively). Round goby and Caspian goby males had a prominent mesorchial gland, a fibrous sheath of pheromone releasing connective tissue that attaches the testes to the dorsal body wall, but the monkey goby specimens examined all lacked this structure. Although ARTs are well documented across fish species and appear to be particularly common in gobies, our study provides the first evidence for ARTs in goby fishes from the Caspian Sea.This article is protected by copyright. All rights reserved.

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Personalities are not associated with different reproductive tactics in male Cape ground squirrels, Xerus inauris

et al. 2022

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Nonmating behavioural differences between male tactics in the invasive round goby

Cited by 5 publications

References 63 publications

Modelling the impacts of male alternative reproductive tactics on population dynamics

Modelling the impacts of male alternative reproductive tactics on population dynamics

Alternative reproductive tactics in goby fishes of the Caspian Sea

Personalities are not associated with different reproductive tactics in male Cape ground squirrels, Xerus inauris

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