Comparación entre dos modelos estructurados por edades, aplicados a la pesquería de langosta, Panulirus Argus (Latreille, 1804), en la región suroriental de Cuba

La langosta común, Panulirus argus, es una de las especies con mayor valor comercial en el Atlántico Centro Occidental. En Cuba se han realizado numerosos estudios para conocer y actualizar su estado de explotación y recomendar medidas de manejo. A pesar de estas medidas, las capturas continúan disminuyendo, por lo que el objetivo del presente estudio consistió en evaluar la dinámica de la población de langosta en la región suroriental de Cuba, a través de dos estrategias analíticas diferentes. A partir de datos de captura y esfuerzo pesquero de 1979-2010, se aplicaron un análisis de población virtual (VPA) y un análisis estadístico de captura por edades (SCA). Se examinó la relación lineal entre los datos primarios y las variables estimadas por los modelos. El ajuste de los modelos lineales de los datos se evaluó mediante el Criterio de Información de Akaike corregido (AICc). Según ambos métodos de captura por edades, el tamaño poblacional y el reclutamiento de langostas con un año de edad han disminuido en la región en el período estudiado, aunque el SCA muestra estabilización en la última década. Mientras, la biomasa poblacional disminuyó hasta estabilizarse en la última década, lo cual puede relacionarse con el comportamiento histórico de la captura por unidad de esfuerzo. Existen asociaciones lineales significativas entre los datos primarios y las variables estimadas. Según los valores de Δi, el modelo VPA garantiza el mejor ajuste de las variables a las relaciones lineales estimadas. Abstract Spiny lobster, Panulirus argus, is one of the most commercially valuable species in the Western Central Atlantic. Although numerous studies have been conducted in Cuba to learn and update its exploitation status and to recommend management measures, catches continue to decline. Consequently, the objective of this study was to evaluate the dynamics of the lobster population in Cuba’s southeastern region, through two different analytical strategies. Using catch and fishing effort data from 1979-2010, a Virtual Population Analysis (VPA) and a Statistical Catch-at-age Analysis (SCA) were applied. We examined the linear relationship between raw data and the variables estimated by the models. The fit of the linear models to data was assessed using the corrected Akaike Information Criterion (AICc). According to both age-structured methods, population size and recruitment of one year old lobster have declined in the region during the study period, although the SCA shows stabilization in the last decade. Population biomass decreased to stabilize in the last decade, this may relate to the historical behavior of the catch per unit effort. There are significant linear associations between raw data and estimated variables. According to Δi values, the VPA model ensures the best fit for the variables of estimated linear relationships.

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Factors affecting relative abundance of low-mobility fishing resources: spiny lobster in the Galapagos Marine Reserve

PeerJ ◽

10.7717/peerj.7278 ◽

2019 ◽

Vol 7 ◽

pp. e7278 ◽

Cited By ~ 1

Author(s):

Juan Carlos Murillo-Posada ◽

Silvia Salas ◽

Iván Velázquez-Abunader

Keyword(s):

Monitoring System ◽

Relative Abundance ◽

Spatial Scales ◽

Marine Reserve ◽

Spiny Lobster ◽

Fishing Effort ◽

Additive Models ◽

Catch Per Unit Effort ◽

Monthly Basis ◽

Galapagos Marine Reserve

Management of low-mobility or benthic fisheries is a difficult task because variation in the spatial distribution and population dynamics of the resources make the monitoring and assessment of these fisheries challenging. We assumed that environmental, spatial, and temporal factors can contribute to the variability of the relative abundance of such species; we used Generalized Additive Models for Location Scale and Shape (GAMLSS) to test this hypothesis using as a case study the lobster fishery (targeting two species) in the Galapagos Marine Reserve, Ecuador. We gathered data on each of the two species of lobster on a monthly basis over seven years, including: (a) onboard observers’ records of catch data, fishing effort, and ground location by trip, and (b) data from interviews undertaken with fishers at their arrival to port, recording the same type of information as obtained from onboard observers. We use this information to analyze the effect of the measured variables and to standardize the Catch per Unit Effort (CPUE) in each case, using the GAMLSS. For both species, the temperature, region, fishing schedule, month, distance, and the monitoring system were significant variables of the selected models associated with the variability of the catch rate. ForPanulirus penicillatus, CPUE was higher at night than during the day, and forPanulirus gracilisit was higher during the day. Increased temperature resulted in a decrease of CPUE values. It was evident that temporal, spatial scales and monitoring system can influence the variability of this indicator. We contend that the identification of drivers of change of relative abundance in low-mobility species can help to support the development of monitoring and assessment programs for this type of fisheries.

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Problems and Perspectives Regarding Recruitment of Spiny Lobsters, Panulirus argus, to the South Florida Fishery

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f86-258 ◽

1986 ◽

Vol 43 (11) ◽

pp. 2099-2106 ◽

Cited By ~ 7

Author(s):

William G. Lyons

Keyword(s):

Carapace Length ◽

Spiny Lobster ◽

Fishing Effort ◽

International Management ◽

South Florida ◽

Panulirus Argus ◽

Minimum Size ◽

Juvenile Growth ◽

Larval Recruitment ◽

Yield Per Recruit

Inappropriate minimum size, illegal harvest, fishery-induced juvenile growth retardation and mortality, and excessive effort have reduced reproductive contributions and depressed yield-per-recruit in the overcapitalized south Florida spiny lobster (Panulirus argus) fishery. Measures recommended to improve yield-per-recruit are as follows: increase minimum legal size to 85–90 mm carapace length; require escape gaps in traps; eliminate possession of sublegal lobsters aboard vessels; prohibit harvest in nurseries; reduce fishing effort; improve enforcement of fishery regulations; and initiate programs to educate fishermen regarding impacts of fishery practices. International management is recommended to assure larval recruitment among Pan-Caribbean stocks.

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Evidence that spillover from Marine Protected Areas benefits the spiny lobster (Panulirus interruptus) fishery in southern California

Scientific Reports ◽

10.1038/s41598-021-82371-5 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Hunter S. Lenihan ◽

Jordan P. Gallagher ◽

Joseph R. Peters ◽

Adrian C. Stier ◽

Jennifer K. K. Hofmeister ◽

...

Keyword(s):

Protected Areas ◽

Marine Protected Areas ◽

Spiny Lobster ◽

Fishing Effort ◽

Fishing Ground ◽

Catch Per Unit Effort ◽

Panulirus Interruptus ◽

The Status ◽

Larval Production ◽

And Behavior

AbstractMarine Protected Areas (MPAs) are designed to enhance biodiversity and ecosystem services. Some MPAs are also established to benefit fisheries through increased egg and larval production, or the spillover of mobile juveniles and adults. Whether spillover influences fishery landings depend on the population status and movement patterns of target species both inside and outside of MPAs, as well as the status of the fishery and behavior of the fleet. We tested whether an increase in the lobster population inside two newly established MPAs influenced local catch, fishing effort, and catch-per-unit-effort (CPUE) within the sustainable California spiny lobster fishery. We found greater build-up of lobsters within MPAs relative to unprotected areas, and greater increases in fishing effort and total lobster catch, but not CPUE, in fishing zones containing MPAs vs. those without MPAs. Our results show that a 35% reduction in fishing area resulting from MPA designation was compensated for by a 225% increase in total catch after 6-years, thus indicating at a local scale that the trade-off of fishing ground for no-fishing zones benefitted the fishery.

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Simulating spatial dynamics to evaluate methods of deriving abundance indices for tropical tunas

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f10-056 ◽

2010 ◽

Vol 67 (9) ◽

pp. 1409-1427 ◽

Cited By ~ 12

Author(s):

Thomas R. Carruthers ◽

Murdoch K. McAllister ◽

Robert N. M. Ahrens

Keyword(s):

Population Dynamics ◽

Relative Abundance ◽

Spatial Dynamics ◽

Selection Criterion ◽

Information Criterion ◽

Fishing Effort ◽

Catch Per Unit Effort ◽

Applied Model ◽

Thunnus Obesus ◽

Abundance Indices

Relative abundance indices derived from nominal catch-per-unit-effort (CPUE) data are a principle source of information for the majority of stock assessments. A particular problem with formulating such abundance indices for pelagic species such as tuna is the interpretation of CPUE data from fleets that have changed distribution over time. In this research, spatial population dynamics are simulated to test the historical pattern of fishing effort as a basis for making inferences about relative abundance. A number of age-structured, spatially disaggregated population dynamics models are described for both Atlantic yellowfin tuna ( Thunnus albacares ) and bigeye tuna ( Thunnus obesus ) to account for uncertainty in spatial distribution and movement. These models are used to evaluate the reliability of standardization methods and a commonly applied model selection criterion, Akaike’s information criterion (AIC). The simulations demonstrate the pitfalls of aggregating CPUE data over spatial areas and highlight the need for data imputation. Simulations support simpler models than those selected using AIC for extracting reliable indices of relative abundance.

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Current status of the spiny lobster, Panulirus argus, fishery in the Los Roques Archipelago National Park, Venezuela

Marine and Freshwater Research ◽

10.1071/mf01212 ◽

2001 ◽

Vol 52 (8) ◽

pp. 1615

Author(s):

Mario Yallonardo ◽

Juan M. Posada ◽

Daniella M. Schweizer ◽

...

Keyword(s):

Size Distribution ◽

National Park ◽

Spiny Lobster ◽

Panulirus Argus ◽

Current Status ◽

Total Catch ◽

Catch Per Unit Effort ◽

Fishing Season ◽

Unit Effort ◽

Lobster Fishery

Los Roques Archipelago National Park traditionally accounts for 95% of the total Venezuelan catch of Panulirus argus. Lobsters are caught in traps and by skin divers, during a 6-month fishing season (1 November to 31 April). The current status of the fishery was evaluated through a comparison of the 1998–99 lobster fishing season with previous studies. Thirty trap licences and 41 skin-diving authorizations were granted in 1998–99. Catch per unit effort was estimated as 2.31 kg/trap/month and 155.66 kg/diver/month, values similar to those from the 1983–1985 and 1986–1988 seasons. Total catch for the 1998–99 season was estimated as 139.31 tonnes (67.1% from traps), 47.78% higher than official reports. Estimated total catch, however, decreased by 40% from previous scientific evaluations. This decline has been attributed to a reduction in numbers of both trap licences and active traps. Size distribution of the 665 lobsters examined was not statistically different from that found in previous studies. The similarities in catch per unit effort and size distribution between the fishing seasons 1983–1985, 1986–1988, and the present study reflect a relatively stable fishery. The spiny-lobster fishery remains the main source of income of the fishers in the archipelago.

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

Forecasting ◽

10.3390/forecast3010004 ◽

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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Directly ageing the Caribbean spiny lobster, Panulirus argus with validated band counts from gastric mill ossicles

ICES Journal of Marine Science ◽

10.1093/icesjms/fsy177 ◽

2018 ◽

Vol 76 (2) ◽

pp. 442-451 ◽

Cited By ~ 7

Author(s):

Gaya Gnanalingam ◽

Mark J Butler ◽

Thomas R Matthews ◽

Emily Hutchinson ◽

Raouf Kilada

Keyword(s):

Spiny Lobster ◽

Age Determination ◽

Florida Keys ◽

Panulirus Argus ◽

Gastric Mill ◽

Coefficients Of Variation ◽

The Caribbean ◽

First Time ◽

Reader Experience

Abstract In crustaceans, ecdysis was long believed to result in the loss and replacement of all calcified structures, precluding the use of conventional ageing methods. However, the discovery of bands in the gastric ossicles of several crustaceans with some correlation with age suggests that direct age estimation may be possible. We applied this method to a tropical spiny lobster, Panulirus argus, one of the most iconic and economically valuable species in the Caribbean. The presence of growth bands was investigated using wild lobsters of unknown age and was validated with captive reared lobsters of known age (1.5–10 years) from the Florida Keys, Florida (USA). Bands were consistently identified in ptero- and zygo-cardiac ossicles of the gastric mill and did not appear to be associated with moulting. Validation with known age animals confirms that bands form annually. Counts between independent readers were reproducible with coefficients of variation ranging from 11% to 26% depending on reader experience and the structure used. This study demonstrates, for the first time, that direct age determination of P. argus is possible.

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Estimation of abundance and spatial distribution of Panulirus argus using different methodologies in artificial shelter, trap and coral reef fisheries

Crustaceana ◽

10.1163/15685403-00003159 ◽

2013 ◽

Vol 86 (2) ◽

pp. 158-181 ◽

Cited By ~ 2

Author(s):

Raúl Cruz ◽

Carlos A. Borda

Keyword(s):

Spatial Distribution ◽

Spiny Lobster ◽

Panulirus Argus ◽

Fishing Gear ◽

Productive Capacity ◽

Fishing Pressure ◽

The West ◽

Effective Measure ◽

Protection Area ◽

Marine Protection

Estimates of spiny lobster stocks (Panulirus argus Latreille, 1804) represent a fundamental input for population assessment models and are, therefore, indispensable for proper management. In this study we analysed methodologies employed in the Gulf of Batabanó (Cuba) and Providencia and Santa Catalina (Colombian Caribbean) to estimate abundance (N) and stock productivity. We found evidence that the relative abundance (CPUE) for trap-like jaulones and skin diving in natural shelters was likely to remain high despite the decline in abundance (hyperstability). In contrast, the proportionality between CPUE and N was satisfactory in artificial shelters (Cuban pesqueros). Stock productivity was greater for jaulones (22 288 kg/km2) than for pesqueros (1309 kg/km2) or natural shelters (15.25 kg/km2), reflecting differences in the productive capacity of each type of fishing gear. In natural shelters the exploitable biomass is under great fishing pressure and the reproductive stock is likely to decrease. Thus, the West zone of Providencia and Santa Catalina, characterized by high-density seagrass and mangrove, should be designated a marine protection area to prevent a lobster fishing collapse. The most effective measure to revert the lobster fishing collapse in Cuba would be to ban the use of jaulones and liftable pesqueros, thereby reducing fishing intensity.

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