scholarly journals The Spatial Variation of Acoustic Water Column Data and Its Relationship with Reef-Associated Fish Recorded by Baited Remote Underwater Stereo-Videos off the Western Australia Coast

2022 ◽  
Vol 10 (1) ◽  
pp. 52
Author(s):  
Marcela Montserrat Landero Figueroa ◽  
Miles J. G. Parsons ◽  
Benjamin J. Saunders ◽  
Iain M. Parnum
Keyword(s):  
Species Abundance ◽  
Fish Distribution ◽  
Spatially Explicit ◽  
Effective Management ◽  
Small Areas ◽  
Marine Park ◽  
Coral Fish ◽  
Abundance And Distribution ◽  
Distribution Of Fish ◽  
Potential Use

Spatially explicit information on coral fish species abundance and distribution is required for effective management. Nonextractive techniques, including echosounders and video census, can be particularly useful in marine reserves where the use of extractive methods is restricted. This study aimed to investigate the possibility of combining echosounders and baited remote underwater stereo-videos (stereo-BRUVs) in providing more holistic information on the distribution of demersal and semidemersal reef-associated fish. The spatial distribution of fish biomass was assessed using both methods in two small areas, one in Cockburn Sound (CS), a temperate body of water, and the other in the tropical waters of the Ningaloo Marine Park (NMP). The results showed high correlations between the acoustic and stereo-BRUV data in CS, suggesting the potential use of both for a better estimation of biomass in the area. The results for the NMP showed weaker correlations between the two datasets and highlighted the high variability of the system. Further studies are required, but our initial findings suggest a potential benefit of combining both techniques in the reef-associated fish distribution assessment.

Fish Abundance and Distribution Near Three Heated Effluents to Lake Michigan

1982 ◽  
Vol 39 (2) ◽  
pp. 305-315 ◽  
Author(s):  
S. A. Spigarelli ◽  
R. M. Goldstein ◽  
W. Prepejchal ◽  
M. M. Thommes
Keyword(s):  
Power Plants ◽  
Lake Michigan ◽  
Fish Distribution ◽  
General Distribution ◽  
Mapping Technique ◽  
Alosa Pseudoharengus ◽  
Increasing Temperature ◽  
Abundance And Distribution ◽  
Distribution Of Fish ◽  
Reference Areas

A combined echo location–temperature mapping technique was used to determine the abundance and distribution of fish with depth and temperature in locally heated and unheated areas of Lake Michigan. Surveys were conducted between April and October at two adjacent power plants in the southern basin and at one plant in the northern basin of the lake. Fish densities in plume and reference areas differed seasonally. Densities typically differed by a factor of 2–4 although on one occasion plume area density was 90 times greater. Highest plume densities occurred during late spring when alewife (Alosa pseudoharengus) were spawning inshore. Consistently dense congregations of fish were found downstream of the interfaces between ambient shore-parallel currents and discharge flows. The general distribution of fish with depth was similar in all areas. Differences between plume and reference areas were related to the discharge type: at canal discharges fish tended to congregate inshore while at the offshore discharge they congregated in deeper zones. Fish also tended to occupy shallower depth strata in all plume areas. Positive correlation between fish density and increasing temperature was common at both plume and reference areas during all three seasons, but more frequent at plume areas. Temperatures selected by fish in plume areas were 1–3 °C higher than maximum ambient temperatures.Key words: fish distribution, thermal outfall, temperature, depth, discharge type, Lake Michigan

scholarly journals COMMUNITY STRUCTURE AND SPATIAL DISTRIBUTION OF FISH JUVENILE IN MANGROVE AND SEAGRASS HABITATS IN PRAMUKA ISLAND

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
Fathul Amin ◽  
M Mukhlis Kamal ◽  
Am Azbas Taurusman
Keyword(s):  
Spatial Distribution ◽  
Community Structure ◽  
Fish Species ◽  
Species Abundance ◽  
Fish Distribution ◽  
Line Transect ◽  
Observation Area ◽  
Significant Difference ◽  
Line Transect Method ◽  
Distribution Of Fish

<p><em>This study was aimed to investigate the community structure of fish juvenile, spatial distribution and similarity from both adjacent habitats </em><em>of</em><em> mangrove and seagrass. This study was conducted in the eastern part of Pramuka island from April to June 2015. The samples were </em><em>collected</em><em> by using line transect method in three observation area</em><em>s</em><em> </em><em>that </em><em>were spatially connected </em><em>i.e.,</em><em> mangrove, transition and seagrass zones. The result of the study from three observation zones revealed that there w</em><em>ere</em><em> found 24 species</em><em> </em><em>of fishes from 15 families </em><em>i.e.,</em><em> Siganidae (4 species), Apogonidae (3 species), Ger</em><em>-</em><em>reidae</em><em> (2 species)</em><em>, Terapontidae</em><em> (2 species)</em><em>, Gobiidae</em><em> (2 species),</em><em> Labridae (2 species), Mugilidae, Nemipteridae, Hemiramphidae, Sphyraenidae, Monacanthidae, Atherinidae, Pomacentridae, Lut</em><em>-</em><em>janidae</em><em>,</em><em> and Lethrinidae (</em><em>each of them </em><em>1 species).</em><em> </em><em>According to community structure, the </em><em>adjacent </em><em>ob</em><em>-</em><em>servation zone</em><em>s</em><em> did not </em><em>show</em><em> a significant difference </em><em>in</em><em> the number of species, abundance</em><em>,</em><em> and bio</em><em>-</em><em>mass. According to fish distribution, fish species in transition zone and seagrass zone were relatively </em><em>similar and</em><em> dominated by <span style="text-decoration: underline;">Gerres</span> <span style="text-decoration: underline;">oblongus</span>, <span style="text-decoration: underline;">Fibramia</span> <span style="text-decoration: underline;">lateralis</span></em><em>,</em><em> </em><em>and <span style="text-decoration: underline;">Siganus</span> <span style="text-decoration: underline;">canaliculatus</span>. Mean</em><em>-</em><em>while, </em><em>in </em><em>mangrove zone </em><em>revealed a significant different of fish species than in transition and seagrass zones.  In mangrove zone, fish species </em><em>was dominated by <span style="text-decoration: underline;">Gerres oblongus</span> and <span style="text-decoration: underline;">Siganus</span> <span style="text-decoration: underline;">guttatus</span>. </em></p><p><em> </em><strong><em>Keywords:</em></strong><em> spatial distribution, juvenile, mangrove, seagrass, pramuka Island, Siganidae</em></p>

scholarly journals Fish distribution in watersheds of the eastern part of the Serra da Mantiqueira (state of São Paulo)

2014 ◽  
Vol 74 (2) ◽  
pp. 302-310
Author(s):  
FMS. Braga ◽  
AL. Carmassi ◽  
G. Rondineli ◽  
JMRMF. Lourenço
Keyword(s):  
Species Abundance ◽  
Fish Fauna ◽  
Abundant Species ◽  
Physical Structure ◽  
Sao Paulo ◽  
Fish Distribution ◽  
São Paulo ◽  
Species Dominance ◽  
Morphological Adaptations ◽  
Distribution Of Fish

The present work aims to analyse jointly four contiguous watersheds in the eastern part of the Serra da Mantiqueira with respect to the distribution of fish fauna and physical structure. The watersheds of Piracuama river, Ribeirão Grande, Buenos and Guaratinguetá are located in Pindamonhangaba, Campos do Jordão and Guaratinguetá municipalities, in the state of São Paulo. Data were collected between the years 2001 and 2010, with collections distributed throughout the seasons, including sites located on the slope and piedmont. The limnological parameters analysed were different between watersheds and habitat structure was different only for the slope segments between Ribeirão Grande and Buenos watersheds, and between Ribeirão Grande and Piracuama watersheds. Thirty-five species of fish were caught, with the highest species richness found in the Ribeirão Grande watershed (30 species), followed by the Piracuama (23 species) and Buenos and Guaratinguetá (21 species each). The most abundant species in both the segments (slope and piedmont) was Trichomycterus itatiayae. The highest degree of species dominance occurred in the Guaratinguetá watershed and in the segment slope, being T. itatiayae the dominant species. Species diversity was lower at the slope than the piedmont, indicating variability in species abundance. Again T. itatiayae was the most abundant species in both segments, showing to be a well adapted species to these streams systems by presenting, as well as other species, morphological adaptations to the stream environment.

scholarly journals Distribution of Fish Target Strength in Malang Rapat Seawater of Bintan Island, Kepulauan Riau Province

2020 ◽  
Vol 4 (1) ◽  
pp. 265-270
Author(s):  
Andi Yaodi Nurani Yamin ◽  
Henry M Manik ◽  
Sri Pujiyati
Keyword(s):  
Coastal Communities ◽  
Fish Distribution ◽  
Target Strength ◽  
Fish Length ◽  
Primary Sector ◽  
Strength Based ◽  
Public Revenue ◽  
Abundance And Distribution ◽  
Distribution Of Fish ◽  
Distribution Behavior

Malang Rapat is an area located in east Bintan Island. As a part of coastal communities, fisheries were the primary sector for public revenue in Malang Rapat. A qualified method is needed to determine the abundance and distribution of fish were required. Hydroacoustic technology is one method to solve this problem. This research aimed was to determine the value of fish target strength and to determine the pattern of fish distribution behavior in Malang Rapat, Kepulauan Riau Province, on September 23 and 24, 2016, using scientific echosounder Simrad EK15. The result indicated that fish target strength in Malang Rapat was -60 dB to -42 dB. This value was useful to estimate the length of fish ranged from 3 cm to 31 cm. The highest mean target strength based on depth was -48 dB at 10 m in the daytime and -52 dB at 3 m in the nighttime. The abundance of fish was found at night, precisely 3 meters from the surface of the water. The highest frequency appearance target strength range from -60 dB to -58 dB with 3.94 to 4.95 cm estimated fish length.

COMMUNITY STRUCTURE AND SPATIAL DISTRIBUTION OF FISH JUVENILE IN MANGROVE AND SEAGRASS HABITATS IN PRAMUKA ISLAND

2016 ◽  
Vol 8 (1) ◽  
pp. 187-199 ◽  
Author(s):  
Fathul Amin ◽  
M Mukhlis Kamal ◽  
Am Azbas Taurusman
Keyword(s):  
Spatial Distribution ◽  
Community Structure ◽  
Fish Species ◽  
Species Abundance ◽  
Fish Distribution ◽  
Line Transect ◽  
Siganus Canaliculatus ◽  
Significant Difference ◽  
Line Transect Method ◽  
Distribution Of Fish

This study was aimed to investigate the community structure of fish juvenile, spatial distribution and similarity from both adjacent habitats of mangrove and seagrass. This study was conducted in the eastern part of Pramuka island from April to June 2015. The samples were collected by using line transect method in three observation areas that were spatially connected i.e., mangrove, transition and seagrass zones. The result of the study from three observation zones revealed that there were found 24 species of fishes from 15 families i.e., Siganidae (4 species), Apogonidae (3 species), Ger-reidae (2 species), Terapontidae (2 species), Gobiidae (2 species), Labridae (2 species), Mugilidae, Nemipteridae, Hemiramphidae, Sphyraenidae, Monacanthidae, Atherinidae, Pomacentridae, Lut-janidae, and Lethrinidae (each of them 1 species). According to community structure, the adjacent ob-servation zones did not show a significant difference in the number of species, abundance, and bio-mass. According to fish distribution, fish species in transition zone and seagrass zone were relatively similar and dominated by Gerres oblongus, Fibramia lateralis, and Siganus canaliculatus. Mean-while, in mangrove zone revealed a significant different of fish species than in transition and seagrass zones.  In mangrove zone, fish species was dominated by Gerres oblongus and Siganus guttatus.  Keywords: spatial distribution, juvenile, mangrove, seagrass, pramuka Island, Siganidae

scholarly journals SEBARAN LARVA IKAN DAN KAITANNYA DENGAN KONDISI OSEANOGRAFI LAUT SULAWESI

2015 ◽  
Vol 21 (2) ◽  
pp. 103
Author(s):  
Khairul Amri ◽  
Atiah Al Mutoharoh ◽  
Dwi Ernaningsih
Keyword(s):  
Spatial Distribution ◽  
High Salinity ◽  
Fish Larvae ◽  
Species Abundance ◽  
Demersal Fish ◽  
Pelagic Fish ◽  
Salinity Condition ◽  
Distribution Mapping ◽  
Abundance And Distribution ◽  
Distribution Of Fish

<p>Laut Sulawesi diketahui sebagai daerah penangkapan ikan yang potensial sekaligus diduga sebagai lokasi pemijahan. Berbagai jenis larva ikan pelagis maupun demersal ditemukan di perairan ini. Kelimpahan dan sebaran larva ikan di suatu perairan sangat dipengaruhi oleh kondisi oseanografi seperti temperatur, salinitas dan sejumlah parameter lainnya termasuk ketersediaan pakan. Untuk mengetahui pengaruh parameter oseanografi terhadap kelimpahan dan sebaran spasial larva ikan di Laut Sulawesi, telah dilakukan penelitian menggunakan kapal riset KR Baruna Jaya VII pada Oktober 2012. Parameter oseanografi yaitu temperatur dan salinitas diukur menggunakan iCTD dan sampling larva menggunakan bonggo net pada 18 stasiun pengukuran. Analisa hubungan kondisi oseanografi dengan sebaran larva dilakukan secara deskriptif dan pemetaan sebarannya dilakukan secara spasial. Hasil menunjukan keterkaitan sejumlah parameter oseanografi dengan kelimpahan dan sebaran spasial larva ikan. Sebaran larva famili Scombroidae dominan berada pada perairan bersalinitas tinggi karena merupakan jenis ikan oseanik. Larva ikan demersal banyak ditemukan di perairan sekitar Kep.Sangihe Talaud. Kelimpahan larva tertinggi ditemukan di perairan bagian utara dan barat lokasi penelitian dimana kelimpahan plankton tinggi ditemukan.</p><p> </p><p>Celebes Sea is known as a potential fishing and spawning grounds for several pelagic fish species. Abundance and distribution of fish larvae are allegedly linked to oceanographic conditions such as temperature, salinity and others oceanographic parameters including food availablity. To see the effect of oceanographic on the abundance and spatial distribution of fish larvae in the Celebes Sea, has conducted a research in October 2012using the research vessel KR Baruna Jaya VII. The measurement of oceanographic parameters including temperature and salinity and larval sampling were done respectively by using iCTD and Bonggo net at 18 measuring stations. The analysis of data was carried out for dertemining the effect of oceanographic condition to the fish larvae distribution and distribution mapping spatially of larvae abundance. Results show that there were a connection between fish larvae abundance and spatial distribution with oceanographic parameters. Scombridae larvae distribution was dominant at waters with high salinity condition because they are oceanic. Demersal fish larvae are mostly found in waters around Sangihe-Talaud islands. Highest abundance of fish larvae was found at northern and western part of research locations where the higher plankton concentration was found.</p>

Preliminary observations on abundance and distribution of fish fauna in a canyon of the Bay of Biscay (ICES Division 8c)

2021 ◽  
pp. 1-10
Author(s):  
G. Diez ◽  
L. Arregi ◽  
M. Basterretxea ◽  
E. Cuende ◽  
I. Oyarzabal
Keyword(s):  
Deep Sea ◽  
Basque Country ◽  
Fish Fauna ◽  
Fishing Effort ◽  
Fishing Gear ◽  
Clear Trend ◽  
Depth Ranges ◽  
Abundance And Distribution ◽  
Sea Fish ◽  
Distribution Of Fish

Abstract The changes in abundance and biodiversity of deep-sea fish fauna are described based on an annual deep-water longline survey with data collected during the period 2015–2019 in the Basque Country continental Slope (ICES Division 8c). The sampling scheme included hauls in four 400 m strata, from 650–2250 m deep. The DST sensors installed in the main line have allowed us to set an accurate soak time for each haul, and they were used to calculate fishing effort and CPUE by haul. The catchability of the fishing gear indicated that 15% of the total hooks deployed in the five-year period were able to fish, and that the bottom longline was very effective in fishing a wide number of different species in all depth ranges. The fishing gear caught 14 different species of sharks (13 deepwater and one pelagic), two chimaeras and nine teleosts. The abundance and biomass registered on the hooks attached to the bottom were between three and four times higher than in the floating sections, and the highest CPUE and biomass were recorded between 1051–1450 m, from 2015 to 2017, and in the 1451–1850 m strata, but they do not show any clear trend throughout the five years of the series.

scholarly journals Fish Ecology of the Alto Madre de Dios River Basin (Peru): Notes on Electrofishing Surveys, Elevation, Palm Swamp and Headwater Fishes

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1038
Author(s):  
Ibon Tobes ◽  
Adrián Ramos-Merchante ◽  
Julio Araujo-Flores ◽  
Andrea Pino-del-Carpio ◽  
Hernán Ortega ◽  
...  
Keyword(s):  
Environmental Variables ◽  
Biosphere Reserve ◽  
Fish Distribution ◽  
Fish Diversity ◽  
Fish Ecology ◽  
Aquatic Habitats ◽  
Madre De Dios ◽  
Distribution Of Fish ◽  
Important Shift ◽  
Electric Fishing

Our study analyzes the distribution of fish communities related to the environmental variables of the Alto Madre de Dios River, an Andean-Amazon watershed of southern Peru, between 300 and 2811 m a.s.l. within the Manu Biosphere Reserve. We provide new ecological and diversity data on fishes for these poorly studied rivers and new data for palm swamp habitats. With electric fishing techniques, we collected a total of 1934 fish specimens belonging to 78 species, 42 genera and 15 families. To assess main patterns of diversity we combined SIMPER and ANOSIM with canonical correspondence analysis to obtain an overview of the community structure of fish and their distribution related to aquatic habitats. Our results show an important shift on fish diversity at 700 m a.s.l. separating headwater and middle-lowland communities. Electrofishing was a hindrance due to the depth, flow and low conductivity of the rivers, but also allowed us to capture fish not observed with other techniques. We also compared the use of elevation with slope as an alternative variable for statistical analysis. Our results show that slope offers a solid and equivalent explanation for fish distribution variability, avoids redundance, and instead of giving geographical data offers ecologically solid information.

scholarly journals The contribution of environmental factors to fish assemblages in the Río Acahuapa, a small drainage in Central America

2017 ◽  
Vol 15 (3) ◽  
Author(s):  
Francisco S. Álvarez ◽  
Wilfredo A. Matamoros ◽  
Francisco A. Chicas
Keyword(s):  
Fish Species ◽  
Habitat Structure ◽  
Fish Assemblages ◽  
Species Abundance ◽  
Main Channel ◽  
Estuarine Fish ◽  
Species Origin ◽  
High Temperature Water ◽  
Distribution Of Fish ◽  
Temperature Water

ABSTRACT The ichthyofauna of the Río Acahuapa was analyzed sampling 17 sites that included the basin main channel and its tributaries. Fish were collected using dip-nets, seine-nets and electrofishing. Fish standard length and species abundance were recorded. Species origin and salinity tolerance criteria were used to classify fish species. Water physicochemical variables, habitat structure and sampling sites elevation were recorded. A total of 33 fish species were registered, 12.1% are primary, 45.5% are secondary and 42.4% are of marine derivation. Fish species richness declined with increase of elevation (R2=0.55, p=0.0006). Two assemblages of fishes were identified: the first one associated to sites of low elevations (19-184 masl), composed mainly of secondary and marine-estuarine fish species related with high temperature, water velocity, river width, dissolved oxygen and low sand and silt substrate cover; the second one associated to sites of middle and higher elevations (185-519 masl), composed by primary and secondary freshwater fishes related with high pH, logs and rocks substrate cover. In summary, elevation and environmental variables contributed to the composition and distribution of fish in the Río Acahuapa.

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