Assessing patterns of fish zonation in temperate mangroves, with emphasis on evaluating sampling artefacts

Hindell, Jeremy S.; Jenkins, Gregory P.

doi:10.3354/meps290193

Cited by 18 publications

(11 citation statements)

References 47 publications

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“…The present study, like previous descriptions of mangrove and salt marsh intertidal fish communities, characterizes nekton distribution as heterogeneous (Kneib 1984, Vance et al 1996, Rönnbäck et al 1999, 2002, Meager et al 2003, Hindell & Jenkins 2005, although the heterogeneity described in our work is temporal (i.e. by tide stage).…”

Section: Implications For Sampling Designsupporting

confidence: 74%

Section: Gear Placementmentioning

confidence: 99%

“…So, block-net samples, collected at high tide, included the interior species omitted in the high-tide video and the exterior species not captured by the drop tube. Given the tempospatial heterogeneity of the fish distribution in mangrove systems (Hindell & Jenkins 2005), it appears that samples that include anything less than the complete intertidal habitat are likely to under-represent species richness.Incomplete and inaccurate descriptions of the intertidal fish community can result in a mischaracterization of the 'value' of natural systems as this valuation is often determined on the basis of 'biodiversity' (Burton et al 1992 ). For example, samples collected near high tide, using gear placed at the exterior edge of the mangroves, would omit the interior species that represented 17.1% of the fish collected in the drop-tube samples during the winter and early spring, underestimating diversity at the site (Sheridan 1992).…”

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confidence: 99%

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Tidal influence on a fringing mangrove intertidal fish community as observed by in situ video recording: implications for studies of tidally migrating nekton

Ellis¹,

Bell²

2008

Mar. Ecol. Prog. Ser.

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The vegetated intertidal zone has long been acknowledged as an important habitat for fish, but our understanding of the dynamics of intertidal migrations by these fish is limited. Using in situ video recordings, we examined fish movements into and out of the waterward margin of a fringing mangrove forest during spring tides at 27 haphazardly chosen sites throughout the Rookery Bay National Estuarine Research Reserve, Florida. Our results indicate that fish respond to tide stage in a species-specific manner. Based on the changes in relative abundance throughout the tide cycle, we identified 4 general intertidal migration patterns: (1) tide-level proportionate, with greatest abundance during high tide; (2) flood-and ebb-tide concentrated, with lowest abundance during high tide; (3) peak abundance at ebb and low tide; and (4) depth-limited but tidally independent. Given that the distribution of the fish within the intertidal zone was heterogeneous, we suggest that the placement of sampling gear within the intertidal zone and the timing of samples within the tide cycle can greatly influence the species composition of fish inventories.KEY WORDS: Fish · Tidal migration · Intertidal · Mangrove · Video · Sampling 370: 207-219, 2008 Our knowledge of the habitat use and dynamics of intertidal migrations has been limited by the logistic difficulties inherent to sampling mobile fauna in structurally complex aquatic habitats (see review by Rozas & Minello 1997). Such sampling is often laborintensive, may require habitat alteration (e.g. removal of vegetation) for the placement of sampling gear, and commonly relies on the ebbing tide to concentrate targeted species for collection. These challenges limit both spatial and temporal sampling replication, and largely prohibit in situ sequential sampling designs that are ideally suited for the study of the within-tide movements of intertidal migrants (Gibson 2003). Resale or republication not permitted without written consent of the publisherMar Ecol Prog SerIn studies of nekton associated with mangrove habitats, the sampling period, when reported, has often been restricted to a single stage of the tide cycle (usually high tide), or if sampling was conducted over multiple tide stages, results have been reported as a cumulative total of individuals captured without mention of within-tide dynamics (Table 1). Quantitative sampling in the mangrove intertidal zone (sensu Rozas & Minello 1997) using enclosure gear has been, to our knowledge, restricted to high tide (Table 1). Passive sampling gear (e.g. fyke nets and block nets, Table 1) that collects fish from generally undefined areas of the intertidal zone as they are drained is positioned at high tide or late flood tide. In each of these instances, the usually implicit, and untested, assumption upon which the sampling designs were based was that most fish swim into the mangrove habitat with the flood tide and depart the intertidal zone as it is drained during the ebb. This assumption is revealed when these studies are in...

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Section: Implications For Sampling Designsupporting

confidence: 74%

Section: Gear Placementmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Tidal influence on a fringing mangrove intertidal fish community as observed by in situ video recording: implications for studies of tidally migrating nekton

Ellis¹,

Bell²

2008

Mar. Ecol. Prog. Ser.

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“…The operation and design of pop nets is well described by Connolly (1994) and Hindell & Jenkins (2005). Briefly, each net had 5 × 5 m buoyant and weighted frames made from 20 mm PVC pipe.…”

Section: Methodsmentioning

confidence: 99%

“…Additionally, mangrove nekton are commonly sampled with semi-quantitative (measuring abundance but not density), 'passive' methods such as gill and fyke nets, which are efficient methods of sampling nekton but do not measure density. Stake, block and drop nets have been used to provide spatially explicit estimates of fish density (Thayer et al 1987, Morton 1990, Ley et al 1999, Lorenz 1999, Ronnback et al 1999), but more recently bottomless pop nets (hereafter referred to as pop nets) have shown promise in quantifying densities of juvenile fishes within mangroves (Hindell & Jenkins 2005). To date, few studies have assessed how faunal samples change between highly quantitative and qualitative methods, or discussed the implications for sampling bias in shaping our understanding of small-scale faunal-habitat associations.…”

Section: Introductionmentioning

confidence: 99%

Assessing effects of diel period, gear selectivity and predation on patterns of microhabitat use by fish in a mangrove dominated system in SE Australia

Smith¹,

Hindell²

2005

Mar. Ecol. Prog. Ser.

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The relative value of temperate mangroves to fish, and the processes driving patterns of microhabitat use within this habitat, are unknown. There are 3 quickly identifiable microhabitats within temperate Australian mangroves: (1) forest (the area of mangroves with trees); (2) pneumatophores (the area directly seaward of the forest without trees but with pneumatophores [aerial roots]); and (3) channel (the area directly seaward of the pneumatophores without gross structural attributes such as trees or pneumatophores). Duplicate fyke and gill nets were both initially used to sample fish in the 3 microhabitats described above. Sampling took place across the seaward edge of mangroves on 10 sampling occasions (5 night and 5 day), in a large estuarine system in SE Australia. Fish assemblages (693 fish from 20 species and 15 families) varied significantly (p < 0.05) between the forest and the channel, and between diel periods for each gear (net type), but there was little difference in the assemblage structure of fish between forest -pneumatophore or pneumatophore-channel microhabitats. Juvenile lifestages (61% of all fish) and commercially important taxa (76%) were common. Abundance, biomass and species richness of fish were generally lower in the forest than the other microhabitats, but this pattern varied significantly (p < 0.05) between diel periods, among sampling occasions, and with water depth. Highly quantitative pop nets provided a preliminary assessment of whether differential gear selectivity caused patterns between microhabitats, but less rich fish assemblages were again recorded in forests than in pneumatophores. The importance of predation in structuring fish assemblages across microhabitats was assessed by measuring survival of juvenile fish tethered in 3 predation treatments (predator exclusion, cage control, and uncaged). Survival rates were high across the predator treatments and did not vary among microhabitats. The variation in fish assemblages across microhabitats within mangroves was not consistent with a model of mangrove structure providing a refuge for juvenile fish from predation, but instead could indicate differences in efficiency of gear types among microhabitats and/or other 'edge effect'-driven processes such as the provision of food and/or shelter. KEY WORDS: Temperate · Mangroves · Fish assemblages · Microhabitat · Predation · DielResale or republication not permitted without written consent of the publisher

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Daily Otolith Increments in the Early Stages of Tropical Fish

Sponaugle

2009

Reviews: Methods and Technologies in Fish Biology and Fisheries

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Assessing patterns of fish zonation in temperate mangroves, with emphasis on evaluating sampling artefacts

Cited by 18 publications

References 47 publications

Tidal influence on a fringing mangrove intertidal fish community as observed by in situ video recording: implications for studies of tidally migrating nekton

Tidal influence on a fringing mangrove intertidal fish community as observed by in situ video recording: implications for studies of tidally migrating nekton

Assessing effects of diel period, gear selectivity and predation on patterns of microhabitat use by fish in a mangrove dominated system in SE Australia

Daily Otolith Increments in the Early Stages of Tropical Fish

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