Comparison of Reef Fish Catch per Unit Effort and Total Mortality between the 1970s and 2005-2006 in Onslow Bay, North Carolina

2008 ◽  
Vol 137 (5) ◽  
pp. 1389-1405 ◽  
Author(s):  
Paul J. Rudershausen ◽  
Erik H. Williams ◽  
Jeffrey A. Buckel ◽  
Jennifer C. Potts ◽  
Charles S. Manooch
Keyword(s):  
North Carolina ◽  
Reef Fish ◽  
Total Mortality ◽  
Catch Per Unit Effort ◽  
Unit Effort ◽  
Fish Catch

scholarly journals The effect of escape gaps of cylinder folding traps on fish catch at the coastal waters of Tuban Regency

2021 ◽  
Vol 322 ◽  
pp. 03002
Author(s):  
Farrel Nafis Adyatama ◽  
Ghassan Nurul Huda ◽  
Nahla Alfiatunnisa ◽  
Faizal Rachman ◽  
Supardjo Supardi Djasmani ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Marine Organisms ◽  
Total Weight ◽  
Total Catch ◽  
Catch Per Unit Effort ◽  
Unit Effort ◽  
Significant Difference ◽  
Fish Catch ◽  
Swimming Crabs

The purpose of this study is to determine the effect of the escape gap of cylinder folding trap on catch per unit effort (CPUE), trap rate, composition, and size of fish caught in the coastal waters of Tuban Regency. The research was conducted in November 2019 by deploying 60 units in ten experimental fishing trips at different locations. The traps were 20 units without escape gap, 20 units with an escape gap of 3 cm x 6 cm, and 20 units with an escape gap of 4 cm x 7 cm. Overall, the experiments resulted in a collection of 22 species of marine organisms, such as swimming crabs (33% of total weight), snails, shrimps, crabs, fishes (55% of total weight), and cuttlefish. The highest CPUE was found for the traps with escape gaps of 4 cm x 7 cm, i.e., 9.18 gr/trap/trip. There was no significant difference in the total catch, the weight of catches, trap rate, and catch per unit effort (CPUE) among the three types of traps.

Changes in Mortality of Lake Trout (Salvelinus namaycush) in Michigan Waters of Lake Superior in Relation to Sea Lamprey (Petromyzon marinus) Predation, 1968–78

1980 ◽  
Vol 37 (11) ◽  
pp. 2063-2073 ◽  
Author(s):  
Richard L. Pycha
Keyword(s):  
Fishery Management ◽  
Lake Trout ◽  
Lake Superior ◽  
Petromyzon Marinus ◽  
Total Mortality ◽  
Sea Lamprey ◽  
Salvelinus Namaycush ◽  
Catch Per Unit Effort ◽  
Instantaneous Rate ◽  
Unit Effort

Total mortality rates of lake trout (Salvelinus namaycush) of age VII and older from eastern Lake Superior were estimated from catch curves of age distributions each year in 1968–78. The instantaneous rate of total mortality Z varied from 0.62 to 2.31 in close synchrony with sea lamprey (Petromyzon marinus) wounding rates on lake trout. The regression of transformed Z on the index of lamprey wounding, accounted for over 89% of the variation in lake trout mortality (r2 = 0.893). An iterative method of estimating rates of exploitation u, instantaneous rates of fishing mortality F, K (a constant relating sample catch per unit effort to population size), instantaneous normal natural mortality rate M, and instantaneous rate of mortality due to sea lamprey predation L from the sample catch per unit effort and total catch by the fishery is presented. A second method using the results of a 1970–71 tagging study to estimate the mean F in 1970–77 yielded closely similar results to the above and is presented as corroboration. The estimates of u, F, and M appear to be reasonable. F ranged from 0.17 in 1974 to 0.42 in 1969 and M was estimated at 0.26. L varied from 0.21 in 1974 to 1.70 in 1968. Management implications of various policies concerning sea lamprey control, exploitation, and stocking are discussed.Key words: lake trout, sea lamprey, lamprey control, mortality, predation, Lake Superior, fishery, management

scholarly journals Comparison of catching efficiency of two Indonesian traditional traps, Ayunan and Tamba

2014 ◽  
Vol 2 (2) ◽  
pp. 113
Author(s):  
. Ahmadi ◽  
Muhammad Arief Yanuar Rachman ◽  
. Irhamsyah ◽  
Saaluddin Husin
Keyword(s):  
Fish Species ◽  
Total Weight ◽  
Catch Per Unit Effort ◽  
Large Variability ◽  
Unit Effort ◽  
Baited Traps ◽  
Fish Catch ◽  
Macrognathus Aculeatus

The catching efficiency of traditional traps: Ayunan and Tamba were tested in Sungai Batang River, South Kalimantan of Indonesia. Trials consisted of 320-trap hauls/type using 1-day submersion time of 24 hr. The baited traps sampling accounted for 82 specimens assigned to 5 species of 5 families. There was a large variability in number of catch between prawns and fish species collected (T=2.318, P<0.05). The prawns catch was represented by only the species Macrobrachium rossenbergii with total of 53 and 1,015 g weight. The prawns weight of Tamba was significantly higher than that of Ayunan (T=3.453, P<0.01).The fish catch composed of Mystus gulio 79%, Osteochilus hasselti 10%, Hypostomus plecostomus 7%, and Macrognathus aculeatus 3%, with total weight ranged from 35 to 560 g. A clear difference was found in catching efficiency. Comparative fishing trials showed that Tamba collected specimens were 1.8 times higher than Ayunan (T=2.223, P<0.05). Catch per unit effort for Tamba ranged from 58.13 to 80.00, and for Ayunan ranged from 5.31 to 7.19. The gear modifications and various treatments (e.g. bait odor, light) are necessary to be taken to increase their relative catching efficiency.

Estimating whole-lake fish catch per unit effort

2015 ◽  
Vol 172 ◽  
pp. 287-302 ◽  
Author(s):  
T.J. Alexander ◽  
P. Vonlanthen ◽  
G. Periat ◽  
F. Degiorgi ◽  
J.C. Raymond ◽  
...  
Keyword(s):  
Catch Per Unit Effort ◽  
Unit Effort ◽  
Fish Catch ◽  
Lake Fish

scholarly journals The effect of escape gap on the cube folding trap on fish catches composition and trap rate at the northern coast of Tuban regency

2021 ◽  
Vol 919 (1) ◽  
pp. 012019
Author(s):  
G N Huda ◽  
F N Adyatma ◽  
N Alfiatunnisa ◽  
F Rachman ◽  
S S Djasmani ◽  
...  
Keyword(s):  
Hermit Crab ◽  
Northern Coast ◽  
Catch Per Unit Effort ◽  
Dominant Group ◽  
Unit Effort ◽  
Long Line ◽  
Significant Difference ◽  
Fish Catch ◽  
Catch Composition

Abstract This study aims to determine the effect of escape gap on catch composition, CPUE, and trap rate at the northern coast of Tuban Regency. The research was conducted by ten trips of experimental fishing at different locations in November 2019. A total of 60 units of cube folding traps were installed long line, consisting of cube folding traps without escape gaps, cube folding traps with escape gaps 6x3 cm, cube folding traps escape gaps 7x4 cm, 20 units, respectively. The fish catch composition consists of 18 species of 6 groups, i.e., fish, swimmer crab, shrimp, hermit crab, and snail. Fish were the most dominant group captured by cube folding traps in the northern coast of Tuban Regency (59.7%), followed by swimmer crab, snail, crab, shrimp, and hermit crab. The highest catch per unit effort was found in cube folding traps with escape gaps 7x4 cm as much as 6,94 gr/traps/trip. The highest of the trap rate (18%) was obtained in the cube folding traps without escape gap. There was a significant difference (p=95%) in the weight of fish catches and CPUE between cube folding traps without escape gaps and the cube folding traps with escape gaps 7 x 4 cm.

scholarly journals STATUS STOK IKAN KARANG TARGET DI KAWASAN KONSERVASI TAMAN NASIONAL KARIMUNJAWA

2016 ◽  
Vol 22 (1) ◽  
pp. 9 ◽  
Author(s):  
Ernik Yuliana ◽  
Mennofatria Boer ◽  
Achmad Fahrudin ◽  
M Mukhlis Kamal ◽  
Efin Muttaqin
Keyword(s):  
Reef Fish ◽  
Secondary Data ◽  
Reef Fishes ◽  
Fish Mortality ◽  
Human Consumption ◽  
Fish Length ◽  
Catch Per Unit Effort ◽  
Central Java ◽  
The Status ◽  
Fish Catch

<p>Sumber daya ikan karang di Taman Nasional Karimunjawa (TNKJ) mengalami tekanan eksploitasi seiring dengan peningkatan permintaan sumber daya ikan untuk memenuhi kebutuhan konsumsi ikan. Tulisan ini bertujuan untuk menganalisis status stok ikan karang target di TNKJ. Penelitian dilakukan di TNKJ Kabupaten Jepara, Provinsi Jawa Tengah, pada April-Agustus 2015. Pengumpulan data menggunakan metode survei dan observasi, mencakup data primer dan sekunder. Empat jenis ikan karang dipilih untuk mewakili ikan karang, yaitu ekor kuning, pisang-pisang, sunu macan, dan jenggot. Hasil tangkapan dianalisis dengan CPUE dan indeks musim. Mortalitas diduga dengan kurva penangkapan yang dilinierkan berdasarkan data komposisi panjang ikan. Penilaian status stok menggunakan metode analitik dengan menghitung laju eksploitasi. Hasil penelitian menunjukkan bahwa CPUE ikan karang mempunyai tren yang meningkat. Ikan karang secara agregat tersedia pada setiap bulan sepanjang tahun, tidak ada musim puncak penangkapan dan musim paceklik. Ikan pisang-pisang dan sunu macan telah dieksploitasi melebihi batas kelestariannya, yaitu 114,50% dan 154,00%.</p><p><em><br /></em></p><p><em>Coral reef fish resources in Karimunjawa National Park (KNP) are under exploitation pressure with increasing demand of fish for human consumption. This study is aimed to analyze the status of target reef fishes in KNP. Field survey was conducted in KNP District of Jepara, Central Java, in April-August 2015. Data consists of primary and secondary data was obtained by using survey and observation method.    Four species of reef fishes were chosen to represent reef fish, namely yellow tail fusilier (Caesio cuning), blue and gold fusilier (Caesio caerulaurea), highfin coral grouper (Plectropomus oligocanthus), and dash-and-dot goatfish (Parupeneus barberinus). Reef fish catch data was analyzed using catch per unit effort (CPUE) and seasonal index. Fish mortality was predicted by catch curve based on length-converted. The results indicate increasing trend of reef fishes CPUE. Reef fishes in aggregate are available every month in year-round and there is no seasonality trend. Fish length analysis reveals that status of blue and gold fusilier and highfin coral grouper have been exploited over maximum sustainable limit, with the rate of exploitation 114.50% and 154.00%, respectively. </em></p>

scholarly journals Is natural bait type a stochastic process for size and condition of fishes in the recreational fishery of Ιzmir Bay?

2011 ◽  
Vol 12 (2) ◽  
pp. 390 ◽  
Author(s):  
I. AYDIN
Keyword(s):  
Middle Eastern ◽  
Aegean Sea ◽  
Sea Bream ◽  
Catch Per Unit Effort ◽  
Frequency Distributions ◽  
Recreational Fishery ◽  
Unit Effort ◽  
Eastern Aegean ◽  
Fish Catch ◽  
Boops Boops

Determining bait type might be one of the most important factors that influence the amount and size of the fish catch in marine recreational fishery. To this end, the relationships between two types of natural bait and catch per unit effort (CPUE), yield per unit effort (YPUE), fish size and condition (K=W/TL3) were evaluated in recreational fishery İzmir Bay (Middle Eastern Aegean Sea, Turkey). The most abundant angling species in Turkish coasts; annular sea bream (Diplodus annularis), blotched picarel (Spicara flexuosa), two banded sea bream (Diplodus vulgaris) and bogue (Boops boops) were collected by anglers between September 2006 – February 2007 with using baits; onyx (Solen vagina), and sardine (Sardina pilchardus). The average CPUE and YPUE of hooks baited with onyx were significantly higher than the bait sardine. Eventhough the averages of specimens caught with bait sardine were bigger than onyx except for bogue but, total length-frequency distributions were revealed some differences only for annular sea bream and blotched picarel between two baits. High conditioned individuals of bogue were caught with bait sardine and the rest of the other species with onyx.

Qarun Lake fisheries; Fishing gears, Species composition and Catch per unit effort

2014 ◽  
Vol 18 (2) ◽  
pp. 39-49
Author(s):  
Sabry El-Serafy ◽  
Alaa El-Haweet ◽  
Azza El-Ganiny ◽  
Alaa El-Far
Keyword(s):  
Species Composition ◽  
Catch Per Unit Effort ◽  
Unit Effort ◽  
Fishing Gears ◽  
Lake Fisheries

scholarly journals Modeling of Lake Malombe Annual Fish Landings and Catch per Unit Effort (CPUE)

Forecasting ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 39-55
Author(s):  
Rodgers Makwinja ◽  
Seyoum Mengistou ◽  
Emmanuel Kaunda ◽  
Tena Alemiew ◽  
Titus Bandulo Phiri ◽  
...  
Keyword(s):  
Time Series ◽  
Information Criterion ◽  
Coefficient Of Determination ◽  
Series Data ◽  
Efficiency Coefficient ◽  
Arima Models ◽  
Catch Per Unit Effort ◽  
Annual Fish ◽  
Unit Effort ◽  
The Mean

Forecasting, using time series data, has become the most relevant and effective tool for fisheries stock assessment. Autoregressive integrated moving average (ARIMA) modeling has been commonly used to predict the general trend for fish landings with increased reliability and precision. In this paper, ARIMA models were applied to predict Lake Malombe annual fish landings and catch per unit effort (CPUE). The annual fish landings and CPUE trends were first observed and both were non-stationary. The first-order differencing was applied to transform the non-stationary data into stationary. Autocorrelation functions (AC), partial autocorrelation function (PAC), Akaike information criterion (AIC), Bayesian information criterion (BIC), square root of the mean square error (RMSE), the mean absolute error (MAE), percentage standard error of prediction (SEP), average relative variance (ARV), Gaussian maximum likelihood estimation (GMLE) algorithm, efficiency coefficient (E2), coefficient of determination (R2), and persistent index (PI) were estimated, which led to the identification and construction of ARIMA models, suitable in explaining the time series and forecasting. According to the measures of forecasting accuracy, the best forecasting models for fish landings and CPUE were ARIMA (0,1,1) and ARIMA (0,1,0). These models had the lowest values AIC, BIC, RMSE, MAE, SEP, ARV. The models further displayed the highest values of GMLE, PI, R2, and E2. The “auto. arima ()” command in R version 3.6.3 further displayed ARIMA (0,1,1) and ARIMA (0,1,0) as the best. The selected models satisfactorily forecasted the fish landings of 2725.243 metric tons and CPUE of 0.097 kg/h by 2024.

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