Spatial and temporal variation in the fish community of a South Island, New Zealand coastal lake

Kattel, Giri; Closs, Gerard P.

doi:10.1080/00288330709509891

Cited by 16 publications

(16 citation statements)

References 29 publications

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“…To ensure only adult morphology was assessed, only fish ‡35 mm standard length were used in these analyses (Stephens, 1982;McDowall, 1990;Kattel & Closs, 2007) as they display the more fully developed morphological characteristics, as observed in other species (e.g. The total amount of pore asymmetry was also recorded as the difference between the number on the left and right sides of the head.…”

Section: Methodsmentioning

confidence: 99%

Habitat‐related patterns in phenotypic variation in a New Zealand freshwater generalist fish, and comparisons with a closely related specialist

2012

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Summary 1. Within‐species phenotypic variation is hugely variable and may play a role in determining the range of habitats a species can exploit. Our study addressed two main questions: 1. does phenotypic variation allow some species (i.e. habitat‐generalists) to use heterogeneous habitats and 2. are habitat‐generalists more variable than species occupying relatively homogeneous environments (i.e. habitat‐specialists)? 2. We examined the morphology of the common bully (Gobiomorphus cotidianus), a habitat‐generalist eleotrid fish found in lakes and rivers throughout New Zealand. We also compared the level of morphological variability in common bullies with that in the closely related redfin bully (Gobiomorphus huttoni), a habitat‐specialist of moderate‐ and fast‐flowing rivers. 3. Common and redfin bullies were collected from the South Island of New Zealand. A series of body and fin measurements were made, and cephalic dorsal head pores of the mechanosensory lateral‐line system were counted. The pores and associated canal neuromasts are important for prey detection and predator avoidance in other species, particularly, in turbulent conditions where the effectiveness of superficial neuromasts may be compromised. 4. The common bully had more dorsal head pores in fish from rivers than in those from lakes. This pattern was apparent only in adults, suggesting that selective pressures associated with adult habitat, be it rivers or lakes, are responsible. 5. As expected, there was greater phenotypic variability in the generalist common bully than in the specialist redfin bully, particularly with regard to the sensory pores, suggesting their importance for survival in turbulence. 6. We identified habitat‐related patterns in phenotypic variability in a generalist species and demonstrated a link between phenotypic variability and habitat breadth. Variation in the common bully may explain its ability to occupy a range of habitats.

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Section: Methodsmentioning

confidence: 99%

Habitat‐related patterns in phenotypic variation in a New Zealand freshwater generalist fish, and comparisons with a closely related specialist

2012

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“…Seasonal changes in common bully densities are a normal feature of the fish biology owing to the periodicity of spawning and related ontogenic shifts in habitat use as juvenile fish develop (Rowe, 1994, 1999; Rowe et al. , 2001; Kattel & Closs, 2007). However, in the field, there is no correlation between the abundance of fish definitive hosts and the proportion of progenetic metacercariae (Lagrue & Poulin, 2008a).…”

Section: Introductionmentioning

confidence: 99%

Life cycle abbreviation in trematode parasites and the developmental time hypothesis: is the clock ticking?

Lagrue

Poulin

2009

J of Evolutionary Biology

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The typical multi‐host life cycle of many parasites, although conferring several advantages, presents the parasites with a highly hazardous transmission route. As a consequence, parasites have evolved various adaptations increasing their chances of transmission between the different hosts of the life cycle. Some trematode species like the opecoelid Coitocaecum parvum have adopted a more drastic alternative strategy whereby the definitive host is facultatively dropped from the cycle, resulting in a shorter, hence easier to complete, life cycle. Like other species capable of abbreviating their life cycle, C. parvum does so through progenetic development within its intermediate host. Laboratory‐reared C. parvum can modulate their developmental strategy inside the second intermediate host according to current transmission opportunities, though this ability is not apparent in natural C. parvum populations. Here we show that this difference is likely due to the time C. parvum individuals spend in their intermediate hosts in the natural environment. Although transmission opportunities, i.e. chemical cues of the presence of definitive hosts, promoted the adoption of a truncated life cycle in the early stages of infection, individuals that remained in their amphipod host for a relatively long time had a similar probability of adopting progenesis and the abbreviated cycle, regardless of the presence or absence of chemical cues from the predator definitive host. These results support the developmental time hypothesis which states that parasites capable of facultative life cycle abbreviation should eventually adopt progenesis regardless of transmission opportunities, and provide further evidence of the adaptive plasticity of parasite transmission strategies.

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“…While sensitive to the chemical cues of perch presence, bullies may rely on visual cues to motivate a move to more complex cover when vision is not impaired. Kattel and Closs (2007) also observed the avoidance of surface waters during the day by common bullies in Lake Waihola, possibly utilizing macrophyte beds to avoid visual predators. However, Kristensen and Closs (2004) observed that bullies made an initial rapid movement followed by adoption of a stationary position on the bottom in response to the introduction of perch odour.…”

Section: Discussionmentioning

confidence: 87%

“…Many studies have suggested that patterns of diel habitat use are a means of predator avoidance (e.g., Anderson et al 2007;Kattel and Closs 2007), and numerous studies have also documented an increased use of structure, or cover, by freshwater fish when exposed to the risk of predation (e.g., Eklov and Persson 1995;Stuart-Smith et al 2008). Martin et al (2010) demonstrated the increased use of cover by fish following the detection of predators by olfactory cues, but there is little experimental evidence for diel habitat use changes in response to olfactory cues alone.…”

Section: Introductionmentioning

confidence: 99%

Diel variation in use of cover and feeding activity of a benthic freshwater fish in response to olfactory cues of a diurnal predator

2011

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Some fish recognize the threat of predatory fish through chemical cues, which may result in variation in diel activity. However, there is little experimental evidence of diel shifts in activity of prey fish in response to the diel activity of a predator. We compared the total prey consumed and the use of cover by common bullies (Gobiomorphus cotidianus), a native benthic feeding eleotrid, when exposed to the odour of an exotic predator, European perch (Perca fluviatilis), over a 12-h period. Our results showed no significant effect of perch odour on feeding activity, but a significant increase in the use of cover at night and a decrease in the use of cover by day. While common bullies may recognize the presence of a predator through chemical cues, dark conditions may inhibit this and other sensory mechanisms, affecting their ability to recognize the proximity of a predator. For example, during the daytime they may rely on visual cues to initiate cover-seeking behavior, but in the dark, vision is impaired giving them less warning of predators, thus potentially making them more vulnerable.

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Spatial and temporal variation in the fish community of a South Island, New Zealand coastal lake

Cited by 16 publications

References 29 publications

Habitat‐related patterns in phenotypic variation in a New Zealand freshwater generalist fish, and comparisons with a closely related specialist

Habitat‐related patterns in phenotypic variation in a New Zealand freshwater generalist fish, and comparisons with a closely related specialist

Life cycle abbreviation in trematode parasites and the developmental time hypothesis: is the clock ticking?

Diel variation in use of cover and feeding activity of a benthic freshwater fish in response to olfactory cues of a diurnal predator

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