Population Dynamics and Spatial Distribution of Coral Reef Fishes: Comparison Between Continuous and Isolated Habitats

Nanami, Atsushi; Nishihira, Moritaka

doi:10.1023/b:ebfi.0000003799.77382.de

Cited by 21 publications

(27 citation statements)

References 39 publications

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“…the magnitude of temporal changes in assemblage structure) at each habitat, two indexes proposed by Nanami & Nishihira (2003) were employed. The first index (temporal fluctuation) was used to determine the extent to which assemblage composition fluctuated between the two periods, whereas the second index (temporal stability) was calculated for determining the degree of constancy in the assemblage between periods.…”

Section: Discussionmentioning

confidence: 99%

“…The two indexes of temporal dynamics (fluctuation and stability) (Nanami & Nishihira, 2003) strongly distinguished between fish assemblages at the CS and US stations. It is likely that the higher availability of shelter and food at CS stations may reduce competition and predation, therefore decreasing temporal fluctuations.…”

Section: Temporal Dynamics In the Structure Of Fish Assemblagesmentioning

confidence: 98%

“…This gap was originally recognized by Ault & Johnson (1998), who experimentally compared reef fish assemblages on both continuous and isolated patch reefs with varying degrees of connectivity, concluding that greater reef size and connectivity enhances the ability of sedentary species to select more favorable microhabitats. As pinpointed by these authors and, more recently, by Nanami & Nishihira (2003), results obtained from isolated patch reefs may not always be extrapolated to fish assemblages on continuous areas. In other words, the factors responsible for the composition and distribution of fishes in continuous areas may be different from those operating on isolated areas.…”

Section: Introductionmentioning

confidence: 97%

“…Sale, 1977;Talbot et al, 1978;Wellington & Victor, 1985;Hixon, 1991), and only few studies have investigated barrier-free, continuous reefs (e.g. Ault & Johnson, 1998;Nanami & Nishihira, 2003). This gap was originally recognized by Ault & Johnson (1998), who experimentally compared reef fish assemblages on both continuous and isolated patch reefs with varying degrees of connectivity, concluding that greater reef size and connectivity enhances the ability of sedentary species to select more favorable microhabitats.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of fish assemblages on a continuous rocky reef and adjacent unconsolidated habitats at Fernando de Noronha Archipelago, tropical western Atlantic

2011

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In recent years, many studies investigated how density-dependent factors, such as shortages in microhabitat and food availability influence the structure of reef fish assemblages. Most of what is currently known, however, comes from comparisons of isolated patch reefs and from correlations between fish abundance and one or few microhabitat variables. In addition, most studies were done in the Caribbean and Indo-Pacific regions, whereas the South Atlantic region has been, to date, understudied. The present study evaluated spatial and temporal variations in reef fish abundance and species richness in a continuous rocky reef and adjacent unconsolidated habitats in a Southwestern Atlantic reef, using underwater techniques to assess both fish numbers and microhabitat variables (depth, rugosity, number of crevices and percent cover of live benthic organisms, bare rock, sand, and limestone). Higher species richness was observed at consolidated substratum stations on both sampling periods (May and October), but fish abundance did not show a significant spatial variation. Topographical complexity and percent cover of algae (except coralline algae) were amongst the most important determinants of species richness, and correlations between fish size and refuge crevice size were observed. The non-random patterns of spatial variation in species richness, and to a lesser extent, fish abundance, were related to differences in substratum characteristics and the inherent characteristics of fishes (i.e. habitat preferences) and not to geographical barriers restraining fish movement. This study highlights the importance of concomitantly assessing several microhabitat variables to determine their relative influence in reef fish assemblages.Em anos recentes, vários estudos investigaram como os fatores dependentes da densidade, por exemplo, a diminuição na disponibilidade de microhabitats e alimento, influenciam a estrutura das assembleias de peixes. A maior parte do que é atualmente conhecida, no entanto, é oriunda de comparações de recifes isolados e de correlações entre abundância de peixes e uma ou poucas variáveis relacionadas ao microhabitat. Ainda, a maior parte dos estudos foi realizada nas regiões do Caribe e do Indo-Pacífico, enquanto a região do Atlântico Sul tem sido, até o momento, subestimada. O presente estudo avaliou as variações espaciais e temporais da abundância de peixes recifais e da riqueza de espécies em um recife rochoso contínuo e em habitats não-consolidados adjacentes em um recife do Atlântico Sudoeste, utilizando técnicas subaquáticas para avaliar tanto os valores dos peixes como as variáveis do microhabitat (profundidade, rugosidade, número de fendas e porcentagem de cobertura de organismos bênticos vivos, rocha nua, areia e cascalho). Uma maior riqueza de espécies foi observada nos pontos de substrato consolidado em ambos os períodos de amostragem (maio e outubro), mas a abundância de peixes não mostrou uma variação espacial significativa. A complexidade topográfica e a porcentagem de cobertura de alga (e...

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Section: Discussionmentioning

confidence: 99%

Section: Temporal Dynamics In the Structure Of Fish Assemblagesmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamics of fish assemblages on a continuous rocky reef and adjacent unconsolidated habitats at Fernando de Noronha Archipelago, tropical western Atlantic

2011

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“…However, patterns described for particular species are supported by the literature where they are known. For example, Marnane (2001) and Nanami & Nishihira (2003) and the similarity in microhabitat associations between it and C. artus (Marnane & Bellwood 2002). It is not known to what degree patterns in Kimbe Bay represent true habitat specialisation or an apparent specialisation that reflects historic changes in the availability of preferred corals.…”

Section: Discussionmentioning

confidence: 99%

Habitat specialisation and overlap in a guild of coral reef cardinalfishes (Apogonidae)

Gardiner¹,

Jones²

2005

Mar. Ecol. Prog. Ser.

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The nocturnally foraging cardinalfishes are known to exhibit a high degree of fidelity to their daytime resting sites. However, the microhabitats chosen as resting sites, the degree of specialisation on live coral substrata and the degree of overlap among apogonid species have not been described. These patterns potentially affect how declining coral availability will impact the diversity and abundance of apogonid assemblages. Here, microhabitat use, abundances and patterns of cooccurrence are examined for 10 common reef-dwelling apogonids in Kimbe Bay, Papua New Guinea. Nine of the 10 species were strongly associated with live scleractinian corals, with more than 80% of the individuals resting in branching forms. The exception was Apogon nigrofasciatus, a specialist on cave or crevice habitats. Among the available coral species, the vast majority of cardinalfishes were associated with a single coral species (Porites cylindrica), although the degree of specialisation varied among species. Apogon leptacanthus and Sphaeramia nematoptera were almost always only found on P. cylindrica, while Apogon bandanensis, Apogon compressus, Apogon fragilis, Archamia fucata, Archamia zosterophora, Cheilodipterus artus and C. quinquelineatus also used a range of other corals. There was a positive relationship between the range of substratum types used and the number of groups of each species observed. The 9 coral-dwelling apogonids exhibited a high degree of overlap in depth range and in the use of coral microhabitats. Over 75% of aggregations were made up of more than one fish species. The high level of both specialisation and overlap in habitat use suggests that the future biodiversity of cardinalfishes in Kimbe Bay could be linked to the fate of a single coral species.

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Using patterns of reef fish assemblages to refine a Habitat Classification System for marine parks in NSW, Australia

Malcolm

Smith

Jordan

2009

Aquatic Conservation

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ABSTRACT1. The Solitary Islands Marine Park (SIMP) in New South Wales (NSW), Australia, is located in a tropicaltemperate biotone, with variable influence of the tropical East Australian Current (EAC) from inshore to offshore. Marine communities on the extensive, subtidal, rocky reefs are poorly described. As a result, the current Habitat Classification System (HCS) used as part of the process to determine the marine park zoning arrangements, which places all shallow reef (o25 m) in the same category, is unlikely to represent real biotic patterns.2. To evaluate the influence of five key factors (distance from shore, reef type, dominant benthos, latitude, and depth range) fish assemblages were widely surveyed, using 30-minute timed counts, at 68 sites across the extent of shallow reef within the park. Relationships between assemblage patterns and levels of the different factors were subsequently examined using multivariate analyses.3. Patterns of reef fish assemblages were most strongly correlated with distance from shore. Three distinct assemblages occurred on inshore (o1.5 km), mid-shelf (1.5-6 km), and offshore (46 km) reefs. Differences in assemblage structure by reef type were also apparent on inshore and offshore reefs, but not on mid-shelf reefs. Correlations with the other factors were weak. The cross-shelf pattern was persistent over the scale of years.4. The results of the study provide strong support for incorporating distance-from-shore categories into a refined HCS. This will improve its ability to represent biological diversity as reflected by patterns of reef fish assemblages. Further research is required to determine the wider application of the HCS to other marine parks in NSW and to determine if it also, effectively, represents other components of biodiversity.

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Population Dynamics and Spatial Distribution of Coral Reef Fishes: Comparison Between Continuous and Isolated Habitats

Cited by 21 publications

References 39 publications

Dynamics of fish assemblages on a continuous rocky reef and adjacent unconsolidated habitats at Fernando de Noronha Archipelago, tropical western Atlantic

Dynamics of fish assemblages on a continuous rocky reef and adjacent unconsolidated habitats at Fernando de Noronha Archipelago, tropical western Atlantic

Habitat specialisation and overlap in a guild of coral reef cardinalfishes (Apogonidae)

Using patterns of reef fish assemblages to refine a Habitat Classification System for marine parks in NSW, Australia

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