scholarly journals Invasive lionfish had no measurable effect on prey fish community structure across the Belizean Barrier Reef

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3270 ◽  
Author(s):  
Serena Hackerott ◽  
Abel Valdivia ◽  
Courtney E. Cox ◽  
Nyssa J. Silbiger ◽  
John F. Bruno
Keyword(s):  
Community Structure ◽  
Reef Fish ◽  
Fish Community ◽  
Fish Communities ◽  
Reef Fishes ◽  
Barrier Reef ◽  
Fish Community Structure ◽  
Prey Fish ◽  
Invasive Lionfish ◽  
Study Sites

Invasive lionfish are assumed to significantly affect Caribbean reef fish communities. However, evidence of lionfish effects on native reef fishes is based on uncontrolled observational studies or small-scale, unrepresentative experiments, with findings ranging from no effect to large effects on prey density and richness. Moreover, whether lionfish affect populations and communities of native reef fishes at larger, management-relevant scales is unknown. The purpose of this study was to assess the effects of lionfish on coral reef prey fish communities in a natural complex reef system. We quantified lionfish and the density, richness, and composition of native prey fishes (0–10 cm total length) at sixteen reefs along ∼250 km of the Belize Barrier Reef from 2009 to 2013. Lionfish invaded our study sites during this four-year longitudinal study, thus our sampling included fish community structure before and after our sites were invaded, i.e., we employed a modified BACI design. We found no evidence that lionfish measurably affected the density, richness, or composition of prey fishes. It is possible that higher lionfish densities are necessary to detect an effect of lionfish on prey populations at this relatively large spatial scale. Alternatively, negative effects of lionfish on prey could be small, essentially undetectable, and ecologically insignificant at our study sites. Other factors that influence the dynamics of reef fish populations including reef complexity, resource availability, recruitment, predation, and fishing could swamp any effects of lionfish on prey populations.

Community changes of coral reef fishes in Bunaken National Park, North Sulawesi, Indonesia

2013 ◽  
Vol 1 (2) ◽  
pp. 117
Author(s):  
Fakhrizal Setiawan ◽  
Janny D Kusen ◽  
Georis JF Kaligis
Keyword(s):  
Reef Fish ◽  
National Park ◽  
Fish Community ◽  
Time Series Data ◽  
Coral Cover ◽  
Fish Communities ◽  
Reef Fishes ◽  
Series Data ◽  
Fish Community Structure ◽  
Reef Fish Community

In order to look at changes in coral and reef fish communities during the period of 2006 to 2013, this research was carried out at Bunaken National Park (BNP) with 26 observation sites. The existing data and information of reef fish communities in the park generally could not be used as representative for describing the whole region. Percentage of coral cover and fish abundance during the study period shows that Bunaken Island is more similar to other locations. Reef fish community structure as seen from ecological index (H' at all sites being categorized, E category labile and low category C) shows the condition of the reef fish community is still good. Changes in the structure of reef fish communities showed declining conditions compared to 2006, and coral cover continued to decrease compared to 1998 and 2007. Good overall reef fish and coral cover have decreased; it is thought to be related to the pressure in BNP. Some of the pressures in the region were (i) increasing numbers of domestic as well as foreign visitors, (ii) increasing number of residents in the region, as well as the burden of waste and trash from the Bay of Manado. Penelitian dilakukan di Taman Nasional Bunaken (Utara dan Selatan)   pada 26 lokasi  pengamatan untuk menganalisis perubahan struktur komunitas ikan karang melalui kajian dari suatu time series data dari beberapa penelitian sebelumnya. Data primer mengenai ikan-ikan karang diperoleh melalui visual sensus bawah air yang bersamaan dengan observasi terumbu karang menggunakan point intercept transect. Nilai persentase tutupan karang dan kelimpahan ikan menunjukkan bahwa pada lokasi pengamatan Pulau Bunaken paling baik dibandingan lokasi lainnya. Struktur komunitas ikan karang yang dianalisis dengan indeks ekologi menunjukkan indeks keanekaragaman (H’) di semua site masuk kategori sedang, indeks kesamaan (E) kategori labil dan indeks Dominansi (C) kategori rendah. Hasil penelitian ini menunjukkan bahwa kondisi komunitas ikan karang masih baik, sekalipun  perubahan struktur komunitas ikan karang menunjukkan kondisi yang menurun dibandingkan tahun 2006, begitu juga tutupan karang yang terus turun dibandingkan tahun 1998 dan 2007. Secara keseluruhan baik ikan karang maupun tutupan karang mengalami penurunan, hal ini diduga terkait dengan tekanan yang dialami kawasan TN. Bunaken. Salah satu tekanan terhadap kawasan adalah jumlah turis dari dalam maupun luar negeri yang semakin meningkat tiap tahunnya, penambahan jumlah penduduk di dalam kawasan, serta beban limbah dan sampah dari Teluk Manado.

scholarly journals Reef fish community structure in the islands of Paraja Bay, Pandeglang District, Banten, Indonesia

2021 ◽  
Vol 22 (10) ◽  
Author(s):  
MUJIYANTO MUJIYANTO ◽  
YAYUK SUGIANTI ◽  
YUSUF ARIEF AFANDY ◽  
RISNAWATI RAHAYU ◽  
R. ARIEF BUDIKUSUMA ◽  
...  
Keyword(s):  
Community Structure ◽  
Reef Fish ◽  
Fish Species ◽  
Fish Community ◽  
Reef Fishes ◽  
Small Islands ◽  
Fish Community Structure ◽  
Evenness Index ◽  
Reef Fish Community ◽  
Low Diversity

Abstract. Mujiyanto, Sugianti Y, Afandy YA, Rahayu R, Bidikusuma RA, Nasriri AS, Syam AR, Purnaningtyas SE. 2021. Reef fish community structure in the islands of Paraja Bay, Pandeglang District, Banten, Indonesia. Biodiversitas 22: 4402-4413. Paraja Bay waters have five small islands that coexist with Ujung Kulon National Marine Park and act as a buffer zone for the diversity of fishery resources. This study aimed to assess the reef fishes community structure at small islands in Paraja Bay. Observations were made in 20 locations during August and September 2019 in the five small islands. Reef fishes community structure showed 106 species as included major group (54 species), indicator group (24 species) and target group (28 species), among five small islands, i.e. Badul, Mangir, Oar, Sumur and Umang Islands. The highest reef fishes abundance was founded in Umang Island waters. Several target fish species recorded during the study were mature fish (such as those targeted by fishermen). Only a small proportion were juveniles. Reef fish community structure was categorized as stress community to stable community with its indication was low diversity value, high evenness index, and low dominance. The low diversity index value illustrates that the level of uniformity of reef fish species in Paraja Bay waters is high. This condition is evidenced by each coral fish group's evenness index included in the main species group around 0.93 to 0.98. The target species is 0.88 to 0.99.

scholarly journals Community structure and niche breadth of some fish in Pangelang Protected Lake, Kapuas Hulu District

2021 ◽  
Vol 21 (2) ◽  
pp. 105-115
Author(s):  
Sri Endah Purnamaningtyas ◽  
Dimas Angga Hedianto ◽  
Nurfiarini Nurfiarini
Keyword(s):  
Community Structure ◽  
Fish Community ◽  
Niche Breadth ◽  
Fish Communities ◽  
Food Preferences ◽  
Survey Method ◽  
Fish Community Structure ◽  
Regional Patterns ◽  
Weather Changes ◽  
Detritivorous Fish

Ecologically, weather changes cause local deviations from regional patterns in waters. So that there will be changes in fish types and food habits.The purpose of this study was to determine changes in fish community structure, food preferences, and area of niches for each type of fish in Pangelang Protected Lake. The research was conducted using a survey method in October 2016 (low tide), June 2018 (transition) and September (flood) 2018. The results obtained: 1. Fish communities in Lake Pangelang obtained a total of 12 families, 30 genera, and 37 species. In the low tide season, there are 21 species of fish caught, 17 species of transition season and 16 types of flood during low tide. 2. In the low tide season, the fish community in Pangelang Lake is dominated by detritivorous fish. In the transitional season, the fish community in Pangelang Lake experiences changes with an increase in the union of phytoplanktivore and insectivore fish. During the flood season, the fish communities in Lake Pangelang underwent a change again where the union of herbivores that used plants increased.

Community structure of reef fishes on a remote oceanic island (St Peter and St Paul’s Archipelago, equatorial Atlantic): the relative influence of abiotic and biotic variables

2015 ◽  
Vol 66 (8) ◽  
pp. 739 ◽  
Author(s):  
Osmar J. Luiz ◽  
Thiago C. Mendes ◽  
Diego R. Barneche ◽  
Carlos G. W. Ferreira ◽  
Ramon Noguchi ◽  
...  
Keyword(s):  
Community Structure ◽  
Fish Community ◽  
Explanatory Variable ◽  
Reef Fishes ◽  
Boosted Regression Trees ◽  
Fish Community Structure ◽  
Equatorial Atlantic ◽  
Topographic Complexity ◽  
Abiotic And Biotic Factors ◽  
Natural Laboratory

This study investigates the reef fish community structure of the world’s smallest remote tropical island, the St Peter and St Paul’s Archipelago, in the equatorial Atlantic. The interplay between isolation, high endemism and low species richness makes the St Peter and St Paul’s Archipelago ecologically simpler than larger and highly connected shelf reef systems, making it an important natural laboratory for ecology and biogeography, particularly with respect to the effects of abiotic and biotic factors, and the functional organisation of such a depauperate community. Boosted regression trees were used to associate density, biomass and diversity of reef fishes with six abiotic and biotic variables, considering the community both as a whole and segregated into seven trophic groups. Depth was the most important explanatory variable across all models, although the direction of its effect varied with the type of response variable. Fish density peaked at intermediate depths, whereas biomass and biodiversity were respectively positively and negatively correlated with depth. Topographic complexity and wave exposure were less important in explaining variance within the fish community than depth. No effects of the predictor biotic variables were detected. Finally, we notice that most functional groups are represented by very few species, highlighting potential vulnerability to disturbances.

Reef fish community structure on coastal islands of the southeastern Brazil: the influence of exposure and benthic cover

2006 ◽  
Vol 78 (2) ◽  
pp. 147-160 ◽  
Author(s):  
Sergio R. Floeter ◽  
Werther Krohling ◽  
João Luiz Gasparini ◽  
Carlos E. L. Ferreira ◽  
Ilana R. Zalmon
Keyword(s):  
Community Structure ◽  
Reef Fish ◽  
Fish Community ◽  
Southeastern Brazil ◽  
Fish Community Structure ◽  
Reef Fish Community

scholarly journals REEF FISHES BIODIVERSITY IN MARINE SANCTUARY AT MINAHASA UTARA DISTRICT, NORTH SULAWESI

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
Fakhrizal Setiawan ◽  
Sonny Tasidjawa ◽  
Efra Wantah ◽  
Hendri Johanis
Keyword(s):  
Reef Fish ◽  
Fish Species ◽  
Fish Community ◽  
Coral Cover ◽  
Good Condition ◽  
Reef Fishes ◽  
Fish Community Structure ◽  
North Sulawesi ◽  
Reef Fish Community ◽  
Reef Fish Species

<p align="center"><strong><em>ABSTRACT</em></strong></p><p><em>There are </em><em>some marine sanctuaries (DPL) which are managed together by its societies in North Minahasa regency. From 19 villages with DPL, we conducted surveys using point intercept transect in 14 villages both inside and outside DPL in the subdistrict West Likupang and East Likupang, North Minahasa. Result showed that l</em><em>ive coral cover was in general in moderate to excellent conditions both inside and outside DPL. Reef fish recorded in the study areas consisted of 267 reef fish species which categorized into 40 families. Bahoi village had the highest abundance and biomass within the DPL due to a very good condition of coral reef ecosystemn (&gt;75% coral cover) both inside and outside DPL. Biomass of reef fish outside DPL of Bahoi was small but its abundance was the highest. This conditions indicated that the size of reef fish outside of Bahoi DPL was small and this gave a positive perspective to supply fishes into the outside region of Bahoi DPL. Overall, marine sanctuary in North Minahasa contained reef fish community structure in good condition, moderate diversity, relatively labile of evenness index, and low dominance. </em><em>Grouping</em><em> by similarity, reef fish species were generally similar in all locations. The separation of DPL locations produced some different fishes group due to its different location, oceanographic conditions, and characters.</em><em></em></p><p> </p><p><strong><em>Keywords</em></strong><em>: Marine sanctuary, reef fish community, North Minahasa.</em></p>

Spatial and temporal variability of fish communities of the Upper Mississippi River, USA

2009 ◽  
Vol 59 (1) ◽  
pp. 67-85 ◽  
Author(s):  
Ayhan Yildirim ◽  
Mark Pegg
Keyword(s):  
Life History ◽  
Community Structure ◽  
Mississippi River ◽  
Fish Community ◽  
Fish Communities ◽  
Morphological Characteristics ◽  
River System ◽  
Functional Composition ◽  
Upper Mississippi River ◽  
Fish Community Structure

AbstractFish community structure, morphological characteristics, functional composition, and life history attributes in relation to three aquatic habitats, backwater shoreline (BWS), main channel borders (MCB), and side channel borders (SCB) in Pool 4 of the Upper Mississippi River System (UMRS) were assessed. Fish communities were sampled annually using standardized electrofishing techniques from 1994 to 2004. We found significant differences in community composition and abundance, and the clearest pattern was that diversity and fish community structure in BWS were different from those in both MCB and SCB. We also found morphological characteristics, functional composition, and life-history differences among the habitats, with fish communities from BWS having a number of different characteristics from both MCB and SCB. Temporal changes in fish abundance, community structure, morphological, functional and life-history attributes from each habitat may reflect both human impact and environmental factors on the Upper Mississippi River System.

scholarly journals Fish Community Structure in Seagrass Beds of Doreri Bay Manokwari Regency

2020 ◽  
pp. 17-29
Author(s):  
Wilhelmus Reinaldo Pattipeilohy ◽  
Thomas Frans Pattiasina ◽  
Simon Petrus Octavianus Leatemia ◽  
Selfanie Talakua
Keyword(s):  
Community Structure ◽  
Coastal Waters ◽  
Fish Community ◽  
Fish Communities ◽  
Seagrass Beds ◽  
Fish Community Structure ◽  
Fish Resources ◽  
Seagrass Ecosystems ◽  
Observation Times ◽  
Descriptive Method

One of the coastal ecosystems that has a high primary productivity, seagrass, makes it a places to find foods (feeding ground), spawn (spawning ground), and shelter for most fish. Whether the structure of fish communities on seagrass beds in the coastal waters of Doreri Bay based on day and night observation times is different from previous studies. This study aims to examine the structure of fish communities on seagrass beds in the coastal waters of Doreri Bay, between the time of observation and compared to previous studies. Data collection takes place during April-May 2019. The method used in this study is a descriptive method, using 1 and 1.5 inch gills net. The results of the study found that seagrass beds in Doreri Bay waters were more than in previous studies, which consisted of 10 species of seagrasses from 2 families (Hydrocharitaceae and Cymodoceaceae). The composition of fish is 56 species with a total of 91 individuals during the day and 189 individuals at night. Fish community structure in Doreri Bay waters has moderate diversity and uniformity while low dominance. Efforts should be made to protect seagrass ecosystems so that fish resources in the Doreri Bay region are maintained.

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