Modelling the spatio-temporal bycatch dynamics in an estuarine small-scale shrimp trawl fishery

Rezende, Gabriela A. De; Rufener, Marie-Christine; Ortega, Ileana; Ruas, Vinicius Mendes; Dumont, Luiz Felipe Cestari

doi:10.1016/j.fishres.2019.105336

Cited by 10 publications

(6 citation statements)

References 44 publications

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“…This species was captured in 81% of the trawls in varying conditions of water quality within the estuary, which suggests a tolerance of this species to a wide range of water quality conditions. Previous studies reported the same pattern for resident species in Buenaventura Bay (Duque et al, 2020;Molina et al, 2020) and other estuaries around the world (Jiang et al, 2014;Ke et al, 2016;Rezende et al, 2019). These species are characterized as having wide physiological tolerance ranges, enabling them to predominate in these highly variable ecosystems.…”

Section: Discussionsupporting

confidence: 58%

Influence of water quality on the macroinvertebrate community in a tropical estuary (Buenaventura Bay)

Duque

Gamboa-García

Molina

et al. 2021

Integr Envir Assess & Manag

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The anthropogenic discharges of inorganic nutrients impact water quality, affecting the macroinvertebrate assemblage and food safety. The main objective of this study was to examine the seawater quality and macroinvertebrate dynamics in muddy habitats of Buenaventura Bay, Colombian Pacific. Macroinvertebrates were captured using artisanal trawl nets during different seasons and along four sampling sites. Multivariate analyses (canonical correspondence analysis and generalized additive model) were used to assess the effects of variations in nitrite, nitrates, phosphate concentrations, and physicochemical variables (salinity, pH, dissolved oxygen [DO], temperature, and total dissolved solids [TDS]) of water on the macroinvertebrate assemblage. Richness was the highest at sites with high salinity and temperature and low concentrations of nitrites and TDS. The densities of the commercial shrimp species Xiphopenaeus riveti and Rimapenaeus byrdi were the highest at sites with higher DO and alkalinity, and lower nitrate concentrations. The swimming crab Callinectes arcuatus was dominant at sites with low water quality. In summary, in the transitional season and at the inner sites of Buenaventura Bay, it was observed the lowest water quality due to high nitrate concentration. High nitrate concentration was highlighted as the main anthropogenic factor that could decrease the capture of target macroinvertebrate species for food and livelihoods of artisanal fishermen and their families. Thus, macroinvertebrate communities may be vulnerable to increased inorganic nutrient inputs, which could affect estuarine water quality and ecosystems services.

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Section: Discussionsupporting

confidence: 58%

Influence of water quality on the macroinvertebrate community in a tropical estuary (Buenaventura Bay)

Duque

Gamboa-García

Molina

et al. 2021

Integr Envir Assess & Manag

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“…Compared with the mainland, wide zones of oceans remains unexplored. In fact, there are few studies based on fishery‐independent sampling (Pennino et al, 2019), which makes observations in many instances dependent on fisheries (e.g., Lezama‐Ochoa et al, 2020; Rezende et al, 2019; Rufener et al, 2017). In many countries, fishery data are the only source available to scientists, which requires their careful and validated use due to its commercially‐driven nature, resulting in possible distribution bias (i.e., preferential sampling) (Alglave et al, 2022; Rufener et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Modelling the distribution of marine fishery resources: Where are we?

et al. 2022

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Ecological niche models (ENMs) and species distribution models (SDMs) have been widely applied to various studies relevant to biogeography, conservation biology, and ecology. These modelling techniques seek to develop spatial maps for projecting, among others past, current, and future species distributions. Born in the field of terrestrial ecology, only in recent years have these models been applied to marine environmental issues, especially to improve the forecasting of the distribution of occurrences and capturing of fishery resources. This study aimed to present through bibliometric analysis the characteristics of articles related to the use of ENMs and SDMs in marine fishery resources considering three main points: (1) state of the art: number of articles over the years, journals, countries, collaborations, and focus of research; (2) characteristics linked to fishery resources: marine biogeographic realms, taxonomic groups, life phases, oceanographic zones, and behaviours; (3) characteristics linked to methods: type of method, type of biological and, environmental data. We provide a list of 378 articles (derived from 930 screened ones), the results, and a discussion of our findings, which represent a baseline for the current status (strengths, limits, and gaps) of the interface between ENMs/SDMs and fishery resources.

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“…The presence of non-target species with commercial value (incidental) and non-commercial value (discard) is the most important shing challenge in areas with high diversity such as tropical areas (Hall et al 2005; Rezende et al 2019). Several factors such as hauling depth, net hauling time (day or night), water physicochemical factors, bed type, net hauling duration, and other factors are effective in the catch composition of caught species by trawl nets (Gorelli et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Several factors such as hauling depth, net hauling time (day or night), water physicochemical factors, bed type, net hauling duration, and other factors are effective in the catch composition of caught species by trawl nets (Gorelli et al 2016). Ecological factors can affect catch per unit effort (CPUE), catch composition, and length frequency of caught species (Samanta et al 2018;Rezende et al 2019). The selectivity of the trawl net as an active and pursuit shing tool is weak and often depends on the target catch (Andrew and Pepperell 1992).…”

Section: Introductionmentioning

confidence: 99%

Trawl Fishery Bycatch in Marine Protected Areas of the Northern Persian Gulf: A Case Study of Dayyer-Nakhiloo and Mond

Darvishi

Kamrani

Safaei

et al. 2023

Preprint

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This study investigates the composition of bycatch and the maturity status of some commercial fish caught by fishing boats equipped with shrimp trawls in the Dayyer-Nakhiloo and Mond marine protected areas in Bushehr, located in the north of the Persian Gulf. Cruises were conducted by fishing boats equipped with 27-foot length and 115-horsepower engines between August 18th and September 20th in 2020 and 2021. The trawl nets were made of polyamide (PA) and had mesh sizes of 50 mm in the body and 40 mm in the bag (STR). After 32 haulings, a total of 37 aquatic species were caught as bycatch. Greater lizardfish (Saurida tumbil), largescale tonguesole (Cynoglossus arel), blue swimming crab (Portunus segnis), whipfin silver-biddy (Gerres filamentosus), spotted sicklefish (Drepane punctata), elongate sole (Solea elongata), and orange-spotted grouper (Epinephelus coioides) were the most frequently caught species in all seasons. The results of the bycatch weight showed that the highest and lowest amounts of bycatch weight were observed in the 18th and 3rd fishing operations in the Mond region, respectively, with 234 kg and 4 kg. Similarly, the highest and lowest amounts of catch per unit effort (CPUE) were observed in the 18th and 9th fishing operations in the Mond region, respectively, with 234 kg h-1 and 3.25 kg h-1. The bycatch to shrimp ratio (r) was computed as 2.32:1. The results of species dominance showed that Acanthopagrus arabicus (9.4%), Scomberomorus commerson (7.75%), and Saurida tumbil (6.05%) had the highest percentage of abundance during the study period. Length frequency data of commercial fish caught showed that Parastromateus niger (44.19%) and Acanthopagrus arabicus (33.81%) had the highest percentage of mature fish in the specimens, while Scomberomorus commerson and Epinephelus coioides had the highest percentage of immature fish (100%). Overall, the present study indicates that bottom trawling by fishing boats in Dayyer-Nakhiloo and Mond marine protected areas poses a threat to the biodiversity of the Persian Gulf. An efficient management approach is therefore essential to promote responsible fisheries in the region.

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Modelling the spatio-temporal bycatch dynamics in an estuarine small-scale shrimp trawl fishery

Cited by 10 publications

References 44 publications

Influence of water quality on the macroinvertebrate community in a tropical estuary (Buenaventura Bay)

Influence of water quality on the macroinvertebrate community in a tropical estuary (Buenaventura Bay)

Modelling the distribution of marine fishery resources: Where are we?

Trawl Fishery Bycatch in Marine Protected Areas of the Northern Persian Gulf: A Case Study of Dayyer-Nakhiloo and Mond

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